Mercurial > cpython-lru_cache-weakref

annotate Modules/resource.c @ 16798:258dcafe2d0b legacy-trunk

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Gustavo Niemeyer <niemeyer@conectiva.com>: Fixed recno support (keys are integers rather than strings). Work around DB bug that cause stdin to be closed by rnopen() when the DB file needed to exist but did not (no longer segfaults). This closes SF tracker patch #403445. Also wrapped some long lines and added whitespace around operators -- FLD.
author Fred Drake <fdrake@acm.org>
date Tue, 27 Feb 2001 18:56:46 +0000
parents 6f6f965c5e2d
children 619a2d6b5ea9
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1da122718598 Added std copyright notice.
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1
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2 #include "Python.h"
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3 #include <sys/resource.h>
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4 #include <sys/time.h>
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5 #include <unistd.h>
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6 #include <string.h>
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7 #include <errno.h>
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8
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9 /* On some systems, these aren't in any header file.
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10 On others they are, with inconsistent prototypes.
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11 We declare the (default) return type, to shut up gcc -Wall;
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12 but we can't declare the prototype, to avoid errors
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13 when the header files declare it different.
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14 Worse, on some Linuxes, getpagesize() returns a size_t... */
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15
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16 #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
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17
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18 static PyObject *ResourceError;
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19
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20 static PyObject *
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21 resource_getrusage(PyObject *self, PyObject *args)
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22 {
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23 int who;
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24 struct rusage ru;
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25
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26 if (!PyArg_ParseTuple(args, "i:getrusage", &who))
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27 return NULL;
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28
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29 if (getrusage(who, &ru) == -1) {
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30 if (errno == EINVAL) {
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31 PyErr_SetString(PyExc_ValueError,
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32 "invalid who parameter");
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33 return NULL;
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34 }
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35 PyErr_SetFromErrno(ResourceError);
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36 return NULL;
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37 }
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38
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39 /* Yeah, this 16-tuple is way ugly. It's probably a lot less
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40 ugly than a dictionary with keys (or object attributes)
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41 named things like 'ixrss'.
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42 */
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43 return Py_BuildValue(
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44 "ddiiiiiiiiiiiiii",
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45 doubletime(ru.ru_utime), /* user time used */
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46 doubletime(ru.ru_stime), /* system time used */
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47 ru.ru_maxrss, /* max. resident set size */
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48 ru.ru_ixrss, /* shared memory size */
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49 ru.ru_idrss, /* unshared memory size */
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50 ru.ru_isrss, /* unshared stack size */
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51 ru.ru_minflt, /* page faults not requiring I/O*/
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52 ru.ru_majflt, /* page faults requiring I/O */
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53 ru.ru_nswap, /* number of swap outs */
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54 ru.ru_inblock, /* block input operations */
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55 ru.ru_oublock, /* block output operations */
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56 ru.ru_msgsnd, /* messages sent */
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57 ru.ru_msgrcv, /* messages received */
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58 ru.ru_nsignals, /* signals received */
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59 ru.ru_nvcsw, /* voluntary context switches */
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60 ru.ru_nivcsw /* involuntary context switches */
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61 );
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62 }
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63
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64
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65 static PyObject *
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66 resource_getrlimit(PyObject *self, PyObject *args)
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67 {
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68 struct rlimit rl;
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69 int resource;
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70
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71 if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
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72 return NULL;
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73
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74 if (resource < 0 || resource >= RLIM_NLIMITS) {
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75 PyErr_SetString(PyExc_ValueError,
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76 "invalid resource specified");
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77 return NULL;
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78 }
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79
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80 if (getrlimit(resource, &rl) == -1) {
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81 PyErr_SetFromErrno(ResourceError);
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82 return NULL;
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83 }
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84
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85 #if defined(HAVE_LONG_LONG)
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86 if (sizeof(rl.rlim_cur) > sizeof(long)) {
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87 return Py_BuildValue("LL",
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88 (LONG_LONG) rl.rlim_cur,
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89 (LONG_LONG) rl.rlim_max);
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90 }
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91 #endif
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92 return Py_BuildValue("ii", (long) rl.rlim_cur, (long) rl.rlim_max);
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93 }
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94
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95 static PyObject *
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96 resource_setrlimit(PyObject *self, PyObject *args)
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97 {
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98 struct rlimit rl;
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99 int resource;
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100 PyObject *curobj, *maxobj;
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101
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102 if (!PyArg_ParseTuple(args, "i(OO):setrlimit", &resource, &curobj, &maxobj))
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103 return NULL;
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104
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105 if (resource < 0 || resource >= RLIM_NLIMITS) {
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106 PyErr_SetString(PyExc_ValueError,
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107 "invalid resource specified");
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108 return NULL;
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109 }
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110
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111 #if !defined(HAVE_LARGEFILE_SUPPORT)
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112 rl.rlim_cur = PyInt_AsLong(curobj);
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113 rl.rlim_max = PyInt_AsLong(maxobj);
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114 #else
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115 /* The limits are probably bigger than a long */
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116 rl.rlim_cur = PyLong_Check(curobj) ?
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117 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
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118 rl.rlim_max = PyLong_Check(maxobj) ?
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119 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
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120 #endif
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121
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122 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
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123 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
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124 if (setrlimit(resource, &rl) == -1) {
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125 if (errno == EINVAL)
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126 PyErr_SetString(PyExc_ValueError,
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127 "current limit exceeds maximum limit");
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128 else if (errno == EPERM)
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129 PyErr_SetString(PyExc_ValueError,
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130 "not allowed to raise maximum limit");
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131 else
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132 PyErr_SetFromErrno(ResourceError);
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133 return NULL;
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134 }
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135 Py_INCREF(Py_None);
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136 return Py_None;
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137 }
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138
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139 static PyObject *
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140 resource_getpagesize(PyObject *self, PyObject *args)
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141 {
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142 if (!PyArg_ParseTuple(args, ":getpagesize"))
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143 return NULL;
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144 return Py_BuildValue("i", getpagesize());
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145 }
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146
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147 /* List of functions */
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148
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149 static struct PyMethodDef
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150 resource_methods[] = {
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151 {"getrusage", resource_getrusage, 1},
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152 {"getrlimit", resource_getrlimit, 1},
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153 {"setrlimit", resource_setrlimit, 1},
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154 {"getpagesize", resource_getpagesize, 1},
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155 {NULL, NULL} /* sentinel */
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156 };
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157
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158
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159 /* Module initialization */
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160
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161 static void
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162 ins(PyObject *dict, char *name, int value)
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163 {
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164 PyObject *v = PyInt_FromLong((long) value);
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165 if (v) {
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166 PyDict_SetItemString(dict, name, v);
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167 Py_DECREF(v);
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168 }
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169 /* errors will be checked by initresource() */
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170 }
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171
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172 void initresource(void)
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173 {
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174 PyObject *m, *d;
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175
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176 /* Create the module and add the functions */
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177 m = Py_InitModule("resource", resource_methods);
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178
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179 /* Add some symbolic constants to the module */
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180 d = PyModule_GetDict(m);
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181 ResourceError = PyErr_NewException("resource.error", NULL, NULL);
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182 PyDict_SetItemString(d, "error", ResourceError);
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183
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184 /* insert constants */
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185 #ifdef RLIMIT_CPU
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186 ins(d, "RLIMIT_CPU", RLIMIT_CPU);
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187 #endif
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188
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189 #ifdef RLIMIT_FSIZE
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190 ins(d, "RLIMIT_FSIZE", RLIMIT_FSIZE);
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191 #endif
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192
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193 #ifdef RLIMIT_DATA
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194 ins(d, "RLIMIT_DATA", RLIMIT_DATA);
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195 #endif
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196
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197 #ifdef RLIMIT_STACK
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198 ins(d, "RLIMIT_STACK", RLIMIT_STACK);
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199 #endif
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200
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201 #ifdef RLIMIT_CORE
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202 ins(d, "RLIMIT_CORE", RLIMIT_CORE);
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203 #endif
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204
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205 #ifdef RLIMIT_NOFILE
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206 ins(d, "RLIMIT_NOFILE", RLIMIT_NOFILE);
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207 #endif
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208
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209 #ifdef RLIMIT_OFILE
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210 ins(d, "RLIMIT_OFILE", RLIMIT_OFILE);
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211 #endif
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212
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213 #ifdef RLIMIT_VMEM
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214 ins(d, "RLIMIT_VMEM", RLIMIT_VMEM);
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215 #endif
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216
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217 #ifdef RLIMIT_AS
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218 ins(d, "RLIMIT_AS", RLIMIT_AS);
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219 #endif
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220
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221 #ifdef RLIMIT_RSS
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222 ins(d, "RLIMIT_RSS", RLIMIT_RSS);
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223 #endif
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224
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225 #ifdef RLIMIT_NPROC
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226 ins(d, "RLIMIT_NPROC", RLIMIT_NPROC);
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227 #endif
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228
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229 #ifdef RLIMIT_MEMLOCK
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230 ins(d, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
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231 #endif
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232
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233 #ifdef RUSAGE_SELF
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234 ins(d, "RUSAGE_SELF", RUSAGE_SELF);
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235 #endif
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236
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237 #ifdef RUSAGE_CHILDREN
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238 ins(d, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
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239 #endif
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240
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241 #ifdef RUSAGE_BOTH
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242 ins(d, "RUSAGE_BOTH", RUSAGE_BOTH);
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243 #endif
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244 }