00de59a632
1997-02-11 05:27 Ulrich Drepper <drepper@cygnus.com> * locale/weight.h (collate_rules): It's an u_int32_t array. (get_weight): Compute initial SLOT value correctly. 1997-02-10 17:45 Ulrich Drepper <drepper@cygnus.com> * string/argz-ctsep.c: Initialize *LEN when successful. * libio/vsnprintf.c: If MAXLEN is 0 return 0. * stdio/vsnprintf.c: Likewise. Reported by Philip Blundell <pjb27@cam.ac.uk>. 1997-02-06 13:49 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * rellns-sh: No need to check for existance of first parameter.
78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/* Perform additional initialization for getopt functions in GNU libc.
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Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Attention: this file is *not* necessary when the GNU getopt functions
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are used outside the GNU libc. Some additional functionality of the
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getopt functions in GNU libc require this additional work. */
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#include <getopt.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "../stdio-common/_itoa.h"
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/* External variable to synchronize work. */
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extern char *__getopt_nonoption_flags;
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extern pid_t __libc_pid;
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/* Remove the environment variable "_<PID>_GNU_nonoption_argv_flags_" if
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it is still available. If the getopt functions are also used in the
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application it does not exist anymore since it was saved for the use
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in getopt. */
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void
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__getopt_clean_environment (void)
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{
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/* Bash 2.0 puts a special variable in the environment for each
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command it runs, specifying which ARGV elements are the results
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of file name wildcard expansion and therefore should not be
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considered as options. */
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static const char envvar_tail[] = "_GNU_nonoption_argv_flags_";
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char var[100];
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char *cp, **ep;
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size_t len;
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/* Generate name of the environment variable. We must know the PID
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and we must not use `sprintf'. */
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if (__libc_pid == 0)
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__libc_pid = getpid ();
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/* Construct "_<PID>_GNU_nonoption_argv_flags_" string. */
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cp = memcpy (&var[sizeof (var) - sizeof (envvar_tail)], envvar_tail,
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sizeof (envvar_tail));
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cp = _itoa_word (__libc_pid, cp, 10, 0);
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*--cp = '_';
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len = (var + sizeof (var) - 1) - cp;
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for (ep = __environ; *ep != NULL; ++ep)
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if (!strncmp (*ep, cp, len) && (*ep)[len] == '=')
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{
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/* Found it. Store this pointer and move later ones back. */
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char **dp = ep;
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__getopt_nonoption_flags = &(*ep)[len + 1];
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do
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dp[0] = dp[1];
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while (*dp++);
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/* Continue the loop in case the name appears again. */
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}
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}
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