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annotate Python/getopt.c @ 33940:dfd07b7be407 legacy-trunk

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SF bug 1061968: threads: segfault or Py_FatalError at exit PyGILState_Ensure(): The fix in 2.4a3 for bug 1010677 reintroduced thread shutdown race bug 225673. Repaired by (once again) ensuring the GIL is held whenever deleting a thread state. Alas, there's no useful test case for this shy bug. Four years ago, only Guido could provoke it, on his box, and today only Armin can provoke it on his box. I've never been able to provoke it (but not for lack of trying!). This is a critical fix for 2.3.5 too, since the fix for 1010677 got backported there already and so also reintroduced 225673. I don't intend to backport this fix. For whoever (if anyone) does, there are other thread fixes in 2.4 that need backporting too, and I bet they need to happen first for this patch to apply cleanly.
author Tim Peters <tim.peters@gmail.com>
date Mon, 08 Nov 2004 04:30:21 +0000
parents a826a46bae54
children 2f3f2e32dfd9
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1 /*---------------------------------------------------------------------------*
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2 * <RCS keywords>
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3 *
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4 * C++ Library
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5 *
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6 * Copyright 1992-1994, David Gottner
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7 *
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8 * All Rights Reserved
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9 *
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10 * Permission to use, copy, modify, and distribute this software and its
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11 * documentation for any purpose and without fee is hereby granted,
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12 * provided that the above copyright notice, this permission notice and
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13 * the following disclaimer notice appear unmodified in all copies.
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14 *
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15 * I DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL I
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17 * BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
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18 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER
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19 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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20 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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21 *
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22 * Nevertheless, I would like to know about bugs in this library or
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23 * suggestions for improvment. Send bug reports and feedback to
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24 * davegottner@delphi.com.
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25 *---------------------------------------------------------------------------*/
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26
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27 #include <stdio.h>
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28 #include <string.h>
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29
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30 int _PyOS_opterr = 1; /* generate error messages */
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31 int _PyOS_optind = 1; /* index into argv array */
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32 char *_PyOS_optarg = NULL; /* optional argument */
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33
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34 int _PyOS_GetOpt(int argc, char **argv, char *optstring)
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35 {
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36 static char *opt_ptr = "";
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37 char *ptr;
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38 int option;
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39
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40 if (*opt_ptr == '\0') {
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41
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42 if (_PyOS_optind >= argc || argv[_PyOS_optind][0] != '-' ||
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43 argv[_PyOS_optind][1] == '\0' /* lone dash */ )
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44 return -1;
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46 else if (strcmp(argv[_PyOS_optind], "--") == 0) {
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47 ++_PyOS_optind;
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48 return -1;
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49 }
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51 opt_ptr = &argv[_PyOS_optind++][1];
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52 }
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53
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54 if ( (option = *opt_ptr++) == '\0')
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55 return -1;
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56
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57 if ((ptr = strchr(optstring, option)) == NULL) {
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58 if (_PyOS_opterr)
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59 fprintf(stderr, "Unknown option: -%c\n", option);
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61 return '?';
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62 }
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63
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64 if (*(ptr + 1) == ':') {
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65 if (*opt_ptr != '\0') {
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66 _PyOS_optarg = opt_ptr;
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67 opt_ptr = "";
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68 }
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70 else {
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71 if (_PyOS_optind >= argc) {
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72 if (_PyOS_opterr)
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73 fprintf(stderr,
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74 "Argument expected for the -%c option\n", option);
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75 return '?';
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76 }
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78 _PyOS_optarg = argv[_PyOS_optind++];
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79 }
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80 }
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81
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82 return option;
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83 }