Commit c7681744 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont

Replacement for setenv() and unsetenv()

parent cd5a8fd2
/*****************************************************************************
* setenv.c: POSIX setenv() & unsetenv() replacement
*****************************************************************************
* Copyright © 2010 Rémi Denis-Courmont
*
* 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 2 of the License, or
* (at your option) 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
int setenv (const char *name, const char *value, int override)
{
if (override == 0 && getenv (name) != NULL)
return 0;
size_t namelen = strlen (name);
size_t valuelen = strlen (value);
char *var = malloc (namelen + valuelen + 2);
if (var == NULL)
return -1;
sprintf (var, "%s=%s", name, value);
/* This leaks memory. This is unavoidable. */
return putenv (var);
}
int unsetenv (const char *name)
{
return setenv (name, "", 1);
}
......@@ -547,8 +547,8 @@ dnl Check for system libs needed
need_libc=false
dnl Check for usual libc functions
AC_CHECK_FUNCS([daemon fcntl fdopendir fstatvfs fork getenv getpwuid_r gettimeofday isatty lstat memalign mmap openat pread posix_fadvise posix_madvise posix_memalign setenv setlocale stricmp strnicmp uselocale])
AC_REPLACE_FUNCS([asprintf atof atoll getcwd getdelim getpid gmtime_r lldiv localtime_r nrand48 rewind strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtok_r strtoll swab tdestroy vasprintf])
AC_CHECK_FUNCS([daemon fcntl fdopendir fstatvfs fork getenv getpwuid_r gettimeofday isatty lstat memalign mmap openat pread posix_fadvise posix_madvise posix_memalign setlocale stricmp strnicmp uselocale])
AC_REPLACE_FUNCS([asprintf atof atoll getcwd getdelim getpid gmtime_r lldiv localtime_r nrand48 rewind setenv strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtok_r strtoll swab tdestroy vasprintf])
AC_CHECK_FUNCS(fdatasync,,
[AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])
])
......
......@@ -170,6 +170,11 @@ static inline char *getenv (const char *name)
}
#endif
#ifndef HAVE_SETENV
int setenv (const char *, const char *, int);
int unsetenv (const char *);
#endif
/* Alignment of critical static data structures */
#ifdef ATTRIBUTE_ALIGNED_MAX
# define ATTR_ALIGN(align) __attribute__ ((__aligned__ ((ATTRIBUTE_ALIGNED_MAX < align) ? ATTRIBUTE_ALIGNED_MAX : align)))
......
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