From 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Thu, 12 Jul 2007 18:26:36 +0000 Subject: 2.5-18.1 --- sysdeps/generic/setenv.c | 353 ----------------------------------------------- 1 file changed, 353 deletions(-) delete mode 100644 sysdeps/generic/setenv.c (limited to 'sysdeps/generic/setenv.c') diff --git a/sysdeps/generic/setenv.c b/sysdeps/generic/setenv.c deleted file mode 100644 index 48aaecffe0..0000000000 --- a/sysdeps/generic/setenv.c +++ /dev/null @@ -1,353 +0,0 @@ -/* Copyright (C) 1992,1995-2001,2004 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#if HAVE_CONFIG_H -# include -#endif - -#include -#if !_LIBC -# if !defined errno && !defined HAVE_ERRNO_DECL -extern int errno; -# endif -# define __set_errno(ev) ((errno) = (ev)) -#endif - -#if _LIBC || HAVE_STDLIB_H -# include -#endif -#if _LIBC || HAVE_STRING_H -# include -#endif -#if _LIBC || HAVE_UNISTD_H -# include -#endif - -#if !_LIBC -# define __environ environ -# ifndef HAVE_ENVIRON_DECL -extern char **environ; -# endif -#endif - -#if _LIBC -/* This lock protects against simultaneous modifications of `environ'. */ -# include -__libc_lock_define_initialized (static, envlock) -# define LOCK __libc_lock_lock (envlock) -# define UNLOCK __libc_lock_unlock (envlock) -#else -# define LOCK -# define UNLOCK -#endif - -/* In the GNU C library we must keep the namespace clean. */ -#ifdef _LIBC -# define setenv __setenv -# define unsetenv __unsetenv -# define clearenv __clearenv -# define tfind __tfind -# define tsearch __tsearch -#endif - -/* In the GNU C library implementation we try to be more clever and - allow arbitrarily many changes of the environment given that the used - values are from a small set. Outside glibc this will eat up all - memory after a while. */ -#if defined _LIBC || (defined HAVE_SEARCH_H && defined HAVE_TSEARCH \ - && defined __GNUC__) -# define USE_TSEARCH 1 -# include - -/* This is a pointer to the root of the search tree with the known - values. */ -static void *known_values; - -# define KNOWN_VALUE(Str) \ - ({ \ - void *value = tfind (Str, &known_values, (__compar_fn_t) strcmp); \ - value != NULL ? *(char **) value : NULL; \ - }) -# define STORE_VALUE(Str) \ - tsearch (Str, &known_values, (__compar_fn_t) strcmp) - -#else -# undef USE_TSEARCH - -# define KNOWN_VALUE(Str) NULL -# define STORE_VALUE(Str) do { } while (0) - -#endif - - -/* If this variable is not a null pointer we allocated the current - environment. */ -static char **last_environ; - - -/* This function is used by `setenv' and `putenv'. The difference between - the two functions is that for the former must create a new string which - is then placed in the environment, while the argument of `putenv' - must be used directly. This is all complicated by the fact that we try - to reuse values once generated for a `setenv' call since we can never - free the strings. */ -int -__add_to_environ (name, value, combined, replace) - const char *name; - const char *value; - const char *combined; - int replace; -{ - register char **ep; - register size_t size; - const size_t namelen = strlen (name); - const size_t vallen = value != NULL ? strlen (value) + 1 : 0; - - LOCK; - - /* We have to get the pointer now that we have the lock and not earlier - since another thread might have created a new environment. */ - ep = __environ; - - size = 0; - if (ep != NULL) - { - for (; *ep != NULL; ++ep) - if (!strncmp (*ep, name, namelen) && (*ep)[namelen] == '=') - break; - else - ++size; - } - - if (ep == NULL || __builtin_expect (*ep == NULL, 1)) - { - char **new_environ; - - /* We allocated this space; we can extend it. */ - new_environ = (char **) realloc (last_environ, - (size + 2) * sizeof (char *)); - if (new_environ == NULL) - { - UNLOCK; - return -1; - } - - /* If the whole entry is given add it. */ - if (combined != NULL) - /* We must not add the string to the search tree since it belongs - to the user. */ - new_environ[size] = (char *) combined; - else - { - /* See whether the value is already known. */ -#ifdef USE_TSEARCH -# ifdef __GNUC__ - char new_value[namelen + 1 + vallen]; -# else - char *new_value = (char *) alloca (namelen + 1 + vallen); -# endif -# ifdef _LIBC - __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1), - value, vallen); -# else - memcpy (new_value, name, namelen); - new_value[namelen] = '='; - memcpy (&new_value[namelen + 1], value, vallen); -# endif - - new_environ[size] = KNOWN_VALUE (new_value); - if (__builtin_expect (new_environ[size] == NULL, 1)) -#endif - { - new_environ[size] = (char *) malloc (namelen + 1 + vallen); - if (__builtin_expect (new_environ[size] == NULL, 0)) - { - __set_errno (ENOMEM); - UNLOCK; - return -1; - } - -#ifdef USE_TSEARCH - memcpy (new_environ[size], new_value, namelen + 1 + vallen); -#else - memcpy (new_environ[size], name, namelen); - new_environ[size][namelen] = '='; - memcpy (&new_environ[size][namelen + 1], value, vallen); -#endif - /* And save the value now. We cannot do this when we remove - the string since then we cannot decide whether it is a - user string or not. */ - STORE_VALUE (new_environ[size]); - } - } - - if (__environ != last_environ) - memcpy ((char *) new_environ, (char *) __environ, - size * sizeof (char *)); - - new_environ[size + 1] = NULL; - - last_environ = __environ = new_environ; - } - else if (replace) - { - char *np; - - /* Use the user string if given. */ - if (combined != NULL) - np = (char *) combined; - else - { -#ifdef USE_TSEARCH -# ifdef __GNUC__ - char new_value[namelen + 1 + vallen]; -# else - char *new_value = (char *) alloca (namelen + 1 + vallen); -# endif -# ifdef _LIBC - __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1), - value, vallen); -# else - memcpy (new_value, name, namelen); - new_value[namelen] = '='; - memcpy (&new_value[namelen + 1], value, vallen); -# endif - - np = KNOWN_VALUE (new_value); - if (__builtin_expect (np == NULL, 1)) -#endif - { - np = malloc (namelen + 1 + vallen); - if (__builtin_expect (np == NULL, 0)) - { - UNLOCK; - return -1; - } - -#ifdef USE_TSEARCH - memcpy (np, new_value, namelen + 1 + vallen); -#else - memcpy (np, name, namelen); - np[namelen] = '='; - memcpy (&np[namelen + 1], value, vallen); -#endif - /* And remember the value. */ - STORE_VALUE (np); - } - } - - *ep = np; - } - - UNLOCK; - - return 0; -} - -int -setenv (name, value, replace) - const char *name; - const char *value; - int replace; -{ - if (name == NULL || *name == '\0' || strchr (name, '=') != NULL) - { - __set_errno (EINVAL); - return -1; - } - - return __add_to_environ (name, value, NULL, replace); -} - -int -unsetenv (name) - 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; -} - -/* The `clearenv' was planned to be added to POSIX.1 but probably - never made it. Nevertheless the POSIX.9 standard (POSIX bindings - for Fortran 77) requires this function. */ -int -clearenv () -{ - LOCK; - - if (__environ == last_environ && __environ != NULL) - { - /* We allocated this environment so we can free it. */ - free (__environ); - last_environ = NULL; - } - - /* Clear the environment pointer removes the whole environment. */ - __environ = NULL; - - UNLOCK; - - return 0; -} -#ifdef _LIBC -libc_freeres_fn (free_mem) -{ - /* Remove all traces. */ - clearenv (); - - /* Now remove the search tree. */ - __tdestroy (known_values, free); - known_values = NULL; -} - -# undef setenv -# undef unsetenv -# undef clearenv -weak_alias (__setenv, setenv) -weak_alias (__unsetenv, unsetenv) -weak_alias (__clearenv, clearenv) -#endif -- cgit 1.4.1