Mercurial > cpython-lru_cache-weakref

annotate Python/getcwd.c @ 10072:ecebcd84df37 legacy-trunk

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put the preferences file in a folder called "Python" inside the prefs folder, just like the IDE does -- jvr
author Just van Rossum <just@lettererror.com>
date Tue, 02 Feb 1999 15:49:03 +0000
parents 65d2d8e67da3
children 8c8de5b736dc
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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 /* Two PD getcwd() implementations.
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33 Author: Guido van Rossum, CWI Amsterdam, Jan 1991, <guido@cwi.nl>. */
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34
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35 #include <stdio.h>
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36 #include <errno.h>
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37
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38 #ifdef HAVE_GETWD
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39
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40 /* Version for BSD systems -- use getwd() */
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41
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42 #ifdef HAVE_SYS_PARAM_H
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43 #include <sys/param.h>
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44 #endif
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45
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46 #ifndef MAXPATHLEN
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47 #define MAXPATHLEN 1024
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48 #endif
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49
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50 extern char *getwd();
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51
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52 char *
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53 getcwd(buf, size)
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54 char *buf;
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55 int size;
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56 {
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57 char localbuf[MAXPATHLEN+1];
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58 char *ret;
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59
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60 if (size <= 0) {
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61 errno = EINVAL;
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62 return NULL;
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63 }
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64 ret = getwd(localbuf);
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65 if (ret != NULL && strlen(localbuf) >= size) {
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66 errno = ERANGE;
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67 return NULL;
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68 }
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69 if (ret == NULL) {
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70 errno = EACCES; /* Most likely error */
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71 return NULL;
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72 }
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73 strncpy(buf, localbuf, size);
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74 return buf;
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75 }
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76
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77 #else /* !HAVE_GETWD */
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78
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79 /* Version for really old UNIX systems -- use pipe from pwd */
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80
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81 #ifndef PWD_CMD
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82 #define PWD_CMD "/bin/pwd"
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83 #endif
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84
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85 char *
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86 getcwd(buf, size)
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87 char *buf;
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88 int size;
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89 {
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90 FILE *fp;
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91 char *p;
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92 int sts;
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93 if (size <= 0) {
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94 errno = EINVAL;
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95 return NULL;
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96 }
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97 if ((fp = popen(PWD_CMD, "r")) == NULL)
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98 return NULL;
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99 if (fgets(buf, size, fp) == NULL || (sts = pclose(fp)) != 0) {
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100 errno = EACCES; /* Most likely error */
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101 return NULL;
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102 }
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103 for (p = buf; *p != '\n'; p++) {
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104 if (*p == '\0') {
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105 errno = ERANGE;
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106 return NULL;
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107 }
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108 }
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109 *p = '\0';
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110 return buf;
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111 }
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112
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113 #endif /* !HAVE_GETWD */