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annotate Python/getcwd.c @ 58664:993f703a61ba

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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
author Benjamin Peterson <benjamin@python.org>
date Wed, 03 Feb 2010 02:35:45 +0000
parents 29ae5e0fc348
children e38335d4df91 5cea27275af1
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2 /* Two PD getcwd() implementations.
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3 Author: Guido van Rossum, CWI Amsterdam, Jan 1991, <guido@cwi.nl>. */
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4
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5 #include <stdio.h>
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6 #include <errno.h>
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7
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8 #ifdef HAVE_GETWD
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9
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10 /* Version for BSD systems -- use getwd() */
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12 #ifdef HAVE_SYS_PARAM_H
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13 #include <sys/param.h>
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14 #endif
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16 #ifndef MAXPATHLEN
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17 #if defined(PATH_MAX) && PATH_MAX > 1024
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18 #define MAXPATHLEN PATH_MAX
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19 #else
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20 #define MAXPATHLEN 1024
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21 #endif
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22 #endif
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24 extern char *getwd(char *);
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26 char *
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27 getcwd(char *buf, int size)
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28 {
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29 char localbuf[MAXPATHLEN+1];
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30 char *ret;
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31
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32 if (size <= 0) {
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33 errno = EINVAL;
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34 return NULL;
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35 }
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36 ret = getwd(localbuf);
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37 if (ret != NULL && strlen(localbuf) >= (size_t)size) {
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38 errno = ERANGE;
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39 return NULL;
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40 }
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41 if (ret == NULL) {
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42 errno = EACCES; /* Most likely error */
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43 return NULL;
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44 }
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45 strncpy(buf, localbuf, size);
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46 return buf;
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47 }
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49 #else /* !HAVE_GETWD */
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50
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51 /* Version for really old UNIX systems -- use pipe from pwd */
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52
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53 #ifndef PWD_CMD
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54 #define PWD_CMD "/bin/pwd"
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55 #endif
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57 char *
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58 getcwd(char *buf, int size)
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59 {
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60 FILE *fp;
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61 char *p;
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62 int sts;
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63 if (size <= 0) {
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64 errno = EINVAL;
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65 return NULL;
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66 }
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67 if ((fp = popen(PWD_CMD, "r")) == NULL)
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68 return NULL;
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69 if (fgets(buf, size, fp) == NULL || (sts = pclose(fp)) != 0) {
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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 for (p = buf; *p != '\n'; p++) {
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74 if (*p == '\0') {
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75 errno = ERANGE;
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76 return NULL;
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77 }
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78 }
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79 *p = '\0';
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80 return buf;
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81 }
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82
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83 #endif /* !HAVE_GETWD */