Mercurial > cpython-lru_cache-weakref

annotate Modules/getpath.c @ 7278:59d2761ba1cf legacy-trunk

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Remove obsolete pagenumbering / pagestyle cruft.
author Fred Drake <fdrake@acm.org>
date Fri, 13 Feb 1998 07:08:56 +0000
parents c9fe35a8298a
children c28b0538a446
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Return the initial module search path. */
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33
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34 #include "Python.h"
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35 #include "osdefs.h"
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36
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37 #include <sys/types.h>
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38 #include <sys/stat.h>
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39 #include <string.h>
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40
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41 #if HAVE_UNISTD_H
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42 #include <unistd.h>
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43 #endif /* HAVE_UNISTD_H */
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44
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45 /* Search in some common locations for the associated Python libraries.
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46 *
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47 * Two directories must be found, the platform independent directory
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48 * (prefix), containing the common .py and .pyc files, and the platform
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49 * dependent directory (exec_prefix), containing the shared library
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50 * modules. Note that prefix and exec_prefix can be the same directory,
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51 * but for some installations, they are different.
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52 *
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53 * Py_GetPath() carries out separate searches for prefix and exec_prefix.
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54 * Each search tries a number of different locations until a ``landmark''
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55 * file or directory is found. If no prefix or exec_prefix is found, a
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56 * warning message is issued and the preprocessor defined PREFIX and
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57 * EXEC_PREFIX are used (even though they will not work); python carries on
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58 * as best as is possible, but most imports will fail.
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59 *
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60 * Before any searches are done, the location of the executable is
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61 * determined. If argv[0] has one or more slashs in it, it is used
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62 * unchanged. Otherwise, it must have been invoked from the shell's path,
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63 * so we search $PATH for the named executable and use that. If the
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64 * executable was not found on $PATH (or there was no $PATH environment
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65 * variable), the original argv[0] string is used.
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66 *
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67 * Next, the executable location is examined to see if it is a symbolic
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68 * link. If so, the link is chased (correctly interpreting a relative
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69 * pathname if one is found) and the directory of the link target is used.
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70 *
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71 * Finally, argv0_path is set to the directory containing the executable
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72 * (i.e. the last component is stripped).
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73 *
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74 * With argv0_path in hand, we perform a number of steps. The same steps
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75 * are performed for prefix and for exec_prefix, but with a different
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76 * landmark.
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77 *
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78 * Step 1. Are we running python out of the build directory? This is
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79 * checked by looking for a different kind of landmark relative to
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80 * argv0_path. For prefix, the landmark's path is derived from the VPATH
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81 * preprocessor variable (taking into account that its value is almost, but
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82 * not quite, what we need). For exec_prefix, the landmark is
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83 * Modules/Setup. If the landmark is found, we're done.
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84 *
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85 * For the remaining steps, the prefix landmark will always be
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86 * lib/python$VERSION/string.py and the exec_prefix will always be
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87 * lib/python$VERSION/lib-dynload, where $VERSION is Python's version
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88 * number as supplied by the Makefile. Note that this means that no more
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89 * build directory checking is performed; if the first step did not find
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90 * the landmarks, the assumption is that python is running from an
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91 * installed setup.
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92 *
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93 * Step 2. See if the $PYTHONHOME environment variable points to the
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94 * installed location of the Python libraries. If $PYTHONHOME is set, then
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95 * it points to prefix and exec_prefix. $PYTHONHOME can be a single
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96 * directory, which is used for both, or the prefix and exec_prefix
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97 * directories separated by a colon.
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98 *
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99 * Step 3. Try to find prefix and exec_prefix relative to argv0_path,
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100 * backtracking up the path until it is exhausted. This is the most common
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101 * step to succeed. Note that if prefix and exec_prefix are different,
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102 * exec_prefix is more likely to be found; however if exec_prefix is a
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103 * subdirectory of prefix, both will be found.
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104 *
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105 * Step 4. Search the directories pointed to by the preprocessor variables
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106 * PREFIX and EXEC_PREFIX. These are supplied by the Makefile but can be
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107 * passed in as options to the configure script.
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108 *
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109 * That's it!
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110 *
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111 * Well, almost. Once we have determined prefix and exec_prefix, the
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112 * preprocesor variable PYTHONPATH is used to construct a path. Each
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113 * relative path on PYTHONPATH is prefixed with prefix. Then the directory
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114 * containing the shared library modules is appended. The environment
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115 * variable $PYTHONPATH is inserted in front of it all. Finally, the
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116 * prefix and exec_prefix globals are tweaked so they reflect the values
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117 * expected by other code, by stripping the "lib/python$VERSION/..." stuff
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118 * off. If either points to the build directory, the globals are reset to
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119 * the corresponding preprocessor variables (so sys.prefix will reflect the
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120 * installation location, even though sys.path points into the build
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121 * directory). This seems to make more sense given that currently the only
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122 * known use of sys.prefix and sys.exec_prefix is for the ILU installation
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123 * process to find the installed Python tree.
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124 */
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125
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126 #ifndef VERSION
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127 #define VERSION "1.5"
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128 #endif
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129
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130 #ifndef VPATH
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131 #define VPATH "."
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132 #endif
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133
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134 #ifndef PREFIX
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135 #define PREFIX "/usr/local"
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136 #endif
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137
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138 #ifndef EXEC_PREFIX
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139 #define EXEC_PREFIX PREFIX
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140 #endif
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141
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142 #ifndef PYTHONPATH
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143 /* I know this isn't K&R C, but the Makefile specifies it anyway */
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144 #define PYTHONPATH PREFIX "/lib/python" VERSION ":" \
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145 EXEC_PREFIX "/lib/python" VERSION "/lib-dynload"
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146 #endif
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147
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148 #ifndef LANDMARK
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149 #define LANDMARK "string.py"
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150 #endif
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151
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152 static char prefix[MAXPATHLEN+1];
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153 static char exec_prefix[MAXPATHLEN+1];
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154 static char progpath[MAXPATHLEN+1];
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155 static char *module_search_path = NULL;
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156 static char lib_python[20]; /* Dynamically set to "lib/python" VERSION */
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157
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158 static void
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159 reduce(dir)
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160 char *dir;
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161 {
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162 int i = strlen(dir);
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163 while (i > 0 && dir[i] != SEP)
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164 --i;
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165 dir[i] = '\0';
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166 }
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167
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168
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169 #ifndef S_ISREG
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170 #define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
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171 #endif
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172
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173 #ifndef S_ISDIR
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174 #define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
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175 #endif
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176
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177 static int
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178 isfile(filename) /* Is file, not directory */
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179 char *filename;
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180 {
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181 struct stat buf;
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182 if (stat(filename, &buf) != 0)
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183 return 0;
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184 if (!S_ISREG(buf.st_mode))
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185 return 0;
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186 return 1;
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187 }
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188
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189
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190 static int
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191 ismodule(filename) /* Is module -- check for .pyc/.pyo too */
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192 char *filename;
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193 {
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194 if (isfile(filename))
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195 return 1;
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196
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197 /* Check for the compiled version of prefix. */
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198 if (strlen(filename) < MAXPATHLEN) {
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199 strcat(filename, Py_OptimizeFlag ? "o" : "c");
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200 if (isfile(filename))
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201 return 1;
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202 }
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203 return 0;
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204 }
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205
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206
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207 static int
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208 isxfile(filename) /* Is executable file */
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209 char *filename;
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210 {
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211 struct stat buf;
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212 if (stat(filename, &buf) != 0)
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213 return 0;
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214 if (!S_ISREG(buf.st_mode))
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215 return 0;
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216 if ((buf.st_mode & 0111) == 0)
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217 return 0;
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218 return 1;
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219 }
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220
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
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221
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222 static int
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223 isdir(filename) /* Is directory */
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224 char *filename;
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225 {
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226 struct stat buf;
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227 if (stat(filename, &buf) != 0)
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228 return 0;
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229 if (!S_ISDIR(buf.st_mode))
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230 return 0;
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
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231 return 1;
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232 }
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233
e77942562dd3 Completely revamped the way the default path is constructed.
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234
e77942562dd3 Completely revamped the way the default path is constructed.
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235 static void
6121
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236 joinpath(buffer, stuff)
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237 char *buffer;
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238 char *stuff;
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239 {
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240 int n, k;
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241 if (stuff[0] == SEP)
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242 n = 0;
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243 else {
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244 n = strlen(buffer);
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245 if (n > 0 && buffer[n-1] != SEP && n < MAXPATHLEN)
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diff changeset
246 buffer[n++] = SEP;
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247 }
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248 k = strlen(stuff);
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249 if (n + k > MAXPATHLEN)
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250 k = MAXPATHLEN - n;
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diff changeset
251 strncpy(buffer+n, stuff, k);
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252 buffer[n+k] = '\0';
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253 }
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254
e77942562dd3 Completely revamped the way the default path is constructed.
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255
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
256 static int
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257 search_for_prefix(argv0_path, home)
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258 char *argv0_path;
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259 char *home;
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260 {
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261 int n;
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262 char *vpath;
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263
5482
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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264 /* Check to see if argv[0] is in the build directory */
5300
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diff changeset
265 strcpy(prefix, argv0_path);
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266 joinpath(prefix, "Modules/Setup");
7117
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267 if (isfile(prefix)) {
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diff changeset
268 /* Check VPATH to see if argv0_path is in the build directory.
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269 * Complication: the VPATH passed in is relative to the
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
270 * Modules build directory and points to the Modules source
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
271 * directory; we need it relative to the build tree and
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
Guido van Rossum <guido@python.org>
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diff changeset
272 * pointing to the source tree. Solution: chop off a leading
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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273 * ".." (but only if it's there -- it could be an absolute
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
274 * path) and chop off the final component (assuming it's
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
275 * "Modules").
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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276 */
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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277 vpath = VPATH;
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
278 if (vpath[0] == '.' && vpath[1] == '.' && vpath[2] == '/')
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
279 vpath += 3;
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
280 strcpy(prefix, argv0_path);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
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281 joinpath(prefix, vpath);
5482
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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diff changeset
282 reduce(prefix);
6121
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diff changeset
283 joinpath(prefix, "Lib");
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
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284 joinpath(prefix, LANDMARK);
7117
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
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diff changeset
285 if (ismodule(prefix))
5482
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
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286 return -1;
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287 }
5300
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288
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
289 if (home) {
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diff changeset
290 /* Check $PYTHONHOME */
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diff changeset
291 char *delim;
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diff changeset
292 strcpy(prefix, home);
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293 delim = strchr(prefix, DELIM);
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diff changeset
294 if (delim)
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295 *delim = '\0';
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296 joinpath(prefix, lib_python);
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297 joinpath(prefix, LANDMARK);
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298 if (ismodule(prefix))
5300
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299 return 1;
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300 }
e77942562dd3 Completely revamped the way the default path is constructed.
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301
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
302 /* Search from argv0_path, until root is found */
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diff changeset
303 strcpy(prefix, argv0_path);
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
304 do {
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
305 n = strlen(prefix);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
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diff changeset
306 joinpath(prefix, lib_python);
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diff changeset
307 joinpath(prefix, LANDMARK);
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diff changeset
308 if (ismodule(prefix))
5300
e77942562dd3 Completely revamped the way the default path is constructed.
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309 return 1;
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diff changeset
310 prefix[n] = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
311 reduce(prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
312 } while (prefix[0]);
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
313
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
314 /* Look at configure's PREFIX */
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
315 strcpy(prefix, PREFIX);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
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diff changeset
316 joinpath(prefix, lib_python);
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
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diff changeset
317 joinpath(prefix, LANDMARK);
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diff changeset
318 if (ismodule(prefix))
5300
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
319 return 1;
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
320
5483
73509efa724b Another change suggested by Donn Cave -- forget "step 5", which
Guido van Rossum <guido@python.org>
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321 /* Fail */
5300
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
322 return 0;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
323 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
324
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
325
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
326 static int
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
327 search_for_exec_prefix(argv0_path, home)
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
328 char *argv0_path;
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
329 char *home;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
330 {
5500
821912fd965a Keep gcc -Wall happy.
Guido van Rossum <guido@python.org>
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diff changeset
331 int n;
5300
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
332
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
333 /* Check to see if argv[0] is in the build directory */
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
334 strcpy(exec_prefix, argv0_path);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
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diff changeset
335 joinpath(exec_prefix, "Modules/Setup");
7117
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
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diff changeset
336 if (isfile(exec_prefix)) {
5300
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
337 reduce(exec_prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
338 return -1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
339 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
340
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
341 if (home) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
342 /* Check $PYTHONHOME */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
343 char *delim;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
344 delim = strchr(home, DELIM);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
345 if (delim)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
346 strcpy(exec_prefix, delim+1);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
347 else
e77942562dd3 Completely revamped the way the default path is constructed.
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diff changeset
348 strcpy(exec_prefix, home);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
Guido van Rossum <guido@python.org>
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diff changeset
349 joinpath(exec_prefix, lib_python);
6498
4981fd2b3211 Change sharedmodules to lib-dynload.
Guido van Rossum <guido@python.org>
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diff changeset
350 joinpath(exec_prefix, "lib-dynload");
7117
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
Guido van Rossum <guido@python.org>
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diff changeset
351 if (isdir(exec_prefix))
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
352 return 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
353 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
354
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
355 /* Search from argv0_path, until root is found */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
356 strcpy(exec_prefix, argv0_path);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
357 do {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
358 n = strlen(exec_prefix);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
Guido van Rossum <guido@python.org>
parents: 5698
diff changeset
359 joinpath(exec_prefix, lib_python);
6498
4981fd2b3211 Change sharedmodules to lib-dynload.
Guido van Rossum <guido@python.org>
parents: 6121
diff changeset
360 joinpath(exec_prefix, "lib-dynload");
7117
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
Guido van Rossum <guido@python.org>
parents: 6823
diff changeset
361 if (isdir(exec_prefix))
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
362 return 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
363 exec_prefix[n] = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
364 reduce(exec_prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
365 } while (exec_prefix[0]);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
366
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
367 /* Look at configure's EXEC_PREFIX */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
368 strcpy(exec_prefix, EXEC_PREFIX);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
Guido van Rossum <guido@python.org>
parents: 5698
diff changeset
369 joinpath(exec_prefix, lib_python);
6498
4981fd2b3211 Change sharedmodules to lib-dynload.
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parents: 6121
diff changeset
370 joinpath(exec_prefix, "lib-dynload");
7117
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
Guido van Rossum <guido@python.org>
parents: 6823
diff changeset
371 if (isdir(exec_prefix))
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
372 return 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
373
5483
73509efa724b Another change suggested by Donn Cave -- forget "step 5", which
Guido van Rossum <guido@python.org>
parents: 5482
diff changeset
374 /* Fail */
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
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diff changeset
375 return 0;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
376 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
377
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
378
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
379 static void
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
380 calculate_path()
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
381 {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
382 extern char *Py_GetProgramName();
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
383
5568
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
384 static char delimiter[2] = {DELIM, '\0'};
139ab21d2629 Make delimiter and separator static for K&R C.
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parents: 5500
diff changeset
385 static char separator[2] = {SEP, '\0'};
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
386 char *pythonpath = PYTHONPATH;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
387 char *rtpypath = getenv("PYTHONPATH");
7209
c9fe35a8298a - Use Py_GetPythonHome() instead of getenv("PYTHONHOME").
Guido van Rossum <guido@python.org>
parents: 7117
diff changeset
388 char *home = Py_GetPythonHome();
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
389 char *path = getenv("PATH");
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
390 char *prog = Py_GetProgramName();
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
391 char argv0_path[MAXPATHLEN+1];
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
392 int pfound, efound; /* 1 if found; -1 if found build directory */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
393 char *buf;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
394 int bufsz;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
395 int prefixsz;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
396 char *defpath = pythonpath;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
397
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
398 /* Initialize this dynamically for K&R C */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
399 sprintf(lib_python, "lib/python%s", VERSION);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
400
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
401 /* If there is no slash in the argv0 path, then we have to
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
402 * assume python is on the user's $PATH, since there's no
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
403 * other way to find a directory to start the search from. If
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
404 * $PATH isn't exported, you lose.
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
405 */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
406 if (strchr(prog, SEP))
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
407 strcpy(progpath, prog);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
408 else if (path) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
409 while (1) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
410 char *delim = strchr(path, DELIM);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
411
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
412 if (delim) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
413 int len = delim - path;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
414 strncpy(progpath, path, len);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
415 *(progpath + len) = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
416 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
417 else
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
418 strcpy(progpath, path);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
419
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
Guido van Rossum <guido@python.org>
parents: 5698
diff changeset
420 joinpath(progpath, prog);
7117
419dca2b3a61 Instead of a single exists(), differentiate between files, modules,
Guido van Rossum <guido@python.org>
parents: 6823
diff changeset
421 if (isxfile(progpath))
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
422 break;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
423
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
424 if (!delim) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
425 progpath[0] = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
426 break;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
427 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
428 path = delim + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
429 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
430 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
431 else
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
432 progpath[0] = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
433
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
434 strcpy(argv0_path, progpath);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
435
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
436 #if HAVE_READLINK
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
437 {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
438 char tmpbuffer[MAXPATHLEN+1];
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
439 int linklen = readlink(progpath, tmpbuffer, MAXPATHLEN);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
440 if (linklen != -1) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
441 /* It's not null terminated! */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
442 tmpbuffer[linklen] = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
443 if (tmpbuffer[0] == SEP)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
444 strcpy(argv0_path, tmpbuffer);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
445 else {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
446 /* Interpret relative to progpath */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
447 reduce(argv0_path);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
Guido van Rossum <guido@python.org>
parents: 5698
diff changeset
448 joinpath(argv0_path, tmpbuffer);
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
449 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
450 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
451 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
452 #endif /* HAVE_READLINK */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
453
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
454 reduce(argv0_path);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
455
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
456 if (!(pfound = search_for_prefix(argv0_path, home))) {
7209
c9fe35a8298a - Use Py_GetPythonHome() instead of getenv("PYTHONHOME").
Guido van Rossum <guido@python.org>
parents: 7117
diff changeset
457 if (!Py_FrozenFlag)
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
458 fprintf(stderr,
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
459 "Could not find platform independent libraries <prefix>\n");
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
460 strcpy(prefix, PREFIX);
6121
df028bc54e6f Globally renamed join() to joinpath() to avoid compilation error on Cray.
Guido van Rossum <guido@python.org>
parents: 5698
diff changeset
461 joinpath(prefix, lib_python);
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
462 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
463 else
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
464 reduce(prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
465
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
466 if (!(efound = search_for_exec_prefix(argv0_path, home))) {
7209
c9fe35a8298a - Use Py_GetPythonHome() instead of getenv("PYTHONHOME").
Guido van Rossum <guido@python.org>
parents: 7117
diff changeset
467 if (!Py_FrozenFlag)
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
468 fprintf(stderr,
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
469 "Could not find platform dependent libraries <exec_prefix>\n");
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
470 strcpy(exec_prefix, EXEC_PREFIX);
6498
4981fd2b3211 Change sharedmodules to lib-dynload.
Guido van Rossum <guido@python.org>
parents: 6121
diff changeset
471 joinpath(exec_prefix, "lib/lib-dynload");
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
472 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
473 /* If we found EXEC_PREFIX do *not* reduce it! (Yet.) */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
474
7209
c9fe35a8298a - Use Py_GetPythonHome() instead of getenv("PYTHONHOME").
Guido van Rossum <guido@python.org>
parents: 7117
diff changeset
475 if ((!pfound || !efound) && !Py_FrozenFlag)
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
476 fprintf(stderr,
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
477 "Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]\n");
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
478
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
479 /* Calculate size of return buffer.
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
480 */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
481 bufsz = 0;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
482
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
483 if (rtpypath)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
484 bufsz += strlen(rtpypath) + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
485
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
486 prefixsz = strlen(prefix) + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
487
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
488 while (1) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
489 char *delim = strchr(defpath, DELIM);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
490
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
491 if (defpath[0] != SEP)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
492 /* Paths are relative to prefix */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
493 bufsz += prefixsz;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
494
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
495 if (delim)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
496 bufsz += delim - defpath + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
497 else {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
498 bufsz += strlen(defpath) + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
499 break;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
500 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
501 defpath = delim + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
502 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
503
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
504 bufsz += strlen(exec_prefix) + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
505
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
506 /* This is the only malloc call in this file */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
507 buf = malloc(bufsz);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
508
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
509 if (buf == NULL) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
510 /* We can't exit, so print a warning and limp along */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
511 fprintf(stderr, "Not enough memory for dynamic PYTHONPATH.\n");
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
512 fprintf(stderr, "Using default static PYTHONPATH.\n");
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
513 module_search_path = PYTHONPATH;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
514 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
515 else {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
516 /* Run-time value of $PYTHONPATH goes first */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
517 if (rtpypath) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
518 strcpy(buf, rtpypath);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
519 strcat(buf, delimiter);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
520 }
5482
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
Guido van Rossum <guido@python.org>
parents: 5316
diff changeset
521 else
6fa29756ec6a Fix problem reported by Donn Cave: if VPATH is an absolute path, it
Guido van Rossum <guido@python.org>
parents: 5316
diff changeset
522 buf[0] = '\0';
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
523
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
524 /* Next goes merge of compile-time $PYTHONPATH with
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
525 * dynamically located prefix.
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
526 */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
527 defpath = pythonpath;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
528 while (1) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
529 char *delim = strchr(defpath, DELIM);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
530
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
531 if (defpath[0] != SEP) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
532 strcat(buf, prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
533 strcat(buf, separator);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
534 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
535
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
536 if (delim) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
537 int len = delim - defpath + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
538 int end = strlen(buf) + len;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
539 strncat(buf, defpath, len);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
540 *(buf + end) = '\0';
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
541 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
542 else {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
543 strcat(buf, defpath);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
544 break;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
545 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
546 defpath = delim + 1;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
547 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
548 strcat(buf, delimiter);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
549
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
550 /* Finally, on goes the directory for dynamic-load modules */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
551 strcat(buf, exec_prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
552
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
553 /* And publish the results */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
554 module_search_path = buf;
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
555 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
556
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
557 /* Reduce prefix and exec_prefix to their essence,
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
558 * e.g. /usr/local/lib/python1.5 is reduced to /usr/local.
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
559 * If we're loading relative to the build directory,
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
560 * return the compiled-in defaults instead.
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
561 */
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
562 if (pfound > 0) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
563 reduce(prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
564 reduce(prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
565 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
566 else
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
567 strcpy(prefix, PREFIX);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
568
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
569 if (efound > 0) {
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
570 reduce(exec_prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
571 reduce(exec_prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
572 reduce(exec_prefix);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
573 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
574 else
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
575 strcpy(exec_prefix, EXEC_PREFIX);
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
576 }
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
577
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
578
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
579 /* External interface */
2896
f0d9f800a4aa Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
580
f0d9f800a4aa Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
581 char *
3621
f158edccc72c grand renaming; added copyright to some files
Guido van Rossum <guido@python.org>
parents: 3416
diff changeset
582 Py_GetPath()
2896
f0d9f800a4aa Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
583 {
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
584 if (!module_search_path)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
585 calculate_path();
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
586 return module_search_path;
2896
f0d9f800a4aa Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
587 }
3674
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
588
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
589 char *
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
590 Py_GetPrefix()
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
591 {
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
592 if (!module_search_path)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
593 calculate_path();
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
594 return prefix;
3674
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
595 }
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
596
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
597 char *
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
598 Py_GetExecPrefix()
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
599 {
5300
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
600 if (!module_search_path)
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
601 calculate_path();
e77942562dd3 Completely revamped the way the default path is constructed.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
602 return exec_prefix;
3674
3eaf2c673a11 provide access to $(exec_)prefix
Guido van Rossum <guido@python.org>
parents: 3621
diff changeset
603 }
5568
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
604
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
605 char *
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
606 Py_GetProgramFullPath()
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
607 {
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
608 if (!module_search_path)
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
609 calculate_path();
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
610 return progpath;
139ab21d2629 Make delimiter and separator static for K&R C.
Guido van Rossum <guido@python.org>
parents: 5500
diff changeset
611 }