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authorUlrich Drepper <drepper@redhat.com>1997-02-11 04:45:23 +0000
committerUlrich Drepper <drepper@redhat.com>1997-02-11 04:45:23 +0000
commit00de59a632eecc23a5eb1ddbadb8a770cd481f43 (patch)
tree294dd1ff7c4394efd3fa17639e9d4e269c68d2c1 /posix/getopt_init.c
parent7cc27f440c2f709fda63af7ecb3747deeeb799f0 (diff)
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update from main archive 970210cvs/libc-970212cvs/libc-970211
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.
Diffstat (limited to 'posix/getopt_init.c')
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diff --git a/posix/getopt_init.c b/posix/getopt_init.c
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+/* Perform additional initialization for getopt functions in GNU libc.
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Attention: this file is *not* necessary when the GNU getopt functions
+ are used outside the GNU libc. Some additional functionality of the
+ getopt functions in GNU libc require this additional work. */
+
+#include <getopt.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "../stdio-common/_itoa.h"
+
+/* External variable to synchronize work. */
+extern char *__getopt_nonoption_flags;
+
+extern pid_t __libc_pid;
+
+
+/* Remove the environment variable "_<PID>_GNU_nonoption_argv_flags_" if
+ it is still available. If the getopt functions are also used in the
+ application it does not exist anymore since it was saved for the use
+ in getopt. */
+void
+__getopt_clean_environment (void)
+{
+ /* Bash 2.0 puts a special variable in the environment for each
+ command it runs, specifying which ARGV elements are the results
+ of file name wildcard expansion and therefore should not be
+ considered as options. */
+ static const char envvar_tail[] = "_GNU_nonoption_argv_flags_";
+ char var[100];
+ char *cp, **ep;
+ size_t len;
+
+ /* Generate name of the environment variable. We must know the PID
+ and we must not use `sprintf'. */
+ if (__libc_pid == 0)
+ __libc_pid = getpid ();
+
+ /* Construct "_<PID>_GNU_nonoption_argv_flags_" string. */
+ cp = memcpy (&var[sizeof (var) - sizeof (envvar_tail)], envvar_tail,
+ sizeof (envvar_tail));
+ cp = _itoa_word (__libc_pid, cp, 10, 0);
+ *--cp = '_';
+ len = (var + sizeof (var) - 1) - cp;
+
+ for (ep = __environ; *ep != NULL; ++ep)
+ if (!strncmp (*ep, cp, len) && (*ep)[len] == '=')
+ {
+ /* Found it. Store this pointer and move later ones back. */
+ char **dp = ep;
+ __getopt_nonoption_flags = &(*ep)[len + 1];
+ do
+ dp[0] = dp[1];
+ while (*dp++);
+ /* Continue the loop in case the name appears again. */
+ }
+}