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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
commit | 2de9abc5c9d40b3c716307d67d16146f823fd554 (patch) | |
tree | 6979db67934ddc8b564150b465846a383b428ff8 /gnulib/lib/putenv.c | |
parent | 33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff) | |
download | patch-baserock/bootstrap.tar.gz |
add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap
Diffstat (limited to 'gnulib/lib/putenv.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/putenv.c | 134 |
2 files changed, 134 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/putenv.c b/gnulib/lib/putenv.c new file mode 100644 index 0000000..2da3376 --- /dev/null +++ b/gnulib/lib/putenv.c @@ -0,0 +1,134 @@ +/* Copyright (C) 1991, 1994, 1997-1998, 2000, 2003-2011 Free Software + Foundation, Inc. + + NOTE: The canonical source of this file is maintained with the GNU C + Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu. + + This program is free software: you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 3 of the License, or any + later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include <stdlib.h> + +#include <stddef.h> + +/* Include errno.h *after* sys/types.h to work around header problems + on AIX 3.2.5. */ +#include <errno.h> +#ifndef __set_errno +# define __set_errno(ev) ((errno) = (ev)) +#endif + +#include <string.h> +#include <unistd.h> + +#if _LIBC +# if HAVE_GNU_LD +# define environ __environ +# else +extern char **environ; +# endif +#endif + +#if _LIBC +/* This lock protects against simultaneous modifications of `environ'. */ +# include <bits/libc-lock.h> +__libc_lock_define_initialized (static, envlock) +# define LOCK __libc_lock_lock (envlock) +# define UNLOCK __libc_lock_unlock (envlock) +#else +# define LOCK +# define UNLOCK +#endif + +static int +_unsetenv (const char *name) +{ + size_t len; + char **ep; + + if (name == NULL || *name == '\0' || strchr (name, '=') != NULL) + { + __set_errno (EINVAL); + return -1; + } + + len = strlen (name); + + LOCK; + + ep = environ; + while (*ep != NULL) + if (!strncmp (*ep, name, len) && (*ep)[len] == '=') + { + /* Found it. Remove this pointer by moving later ones back. */ + char **dp = ep; + + do + dp[0] = dp[1]; + while (*dp++); + /* Continue the loop in case NAME appears again. */ + } + else + ++ep; + + UNLOCK; + + return 0; +} + + +/* Put STRING, which is of the form "NAME=VALUE", in the environment. + If STRING contains no `=', then remove STRING from the environment. */ +int +putenv (char *string) +{ + const char *const name_end = strchr (string, '='); + register size_t size; + register char **ep; + + if (name_end == NULL) + { + /* Remove the variable from the environment. */ + return _unsetenv (string); + } + + size = 0; + for (ep = environ; *ep != NULL; ++ep) + if (!strncmp (*ep, string, name_end - string) && + (*ep)[name_end - string] == '=') + break; + else + ++size; + + if (*ep == NULL) + { + static char **last_environ = NULL; + char **new_environ = (char **) malloc ((size + 2) * sizeof (char *)); + if (new_environ == NULL) + return -1; + (void) memcpy ((void *) new_environ, (void *) environ, + size * sizeof (char *)); + new_environ[size] = (char *) string; + new_environ[size + 1] = NULL; + free (last_environ); + last_environ = new_environ; + environ = new_environ; + } + else + *ep = string; + + return 0; +} |