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Get putenv.c from /copies (derived from glibc).

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Hack it to work with SGI's __environ junk.
This commit is contained in:
Jim Meyering 1994-12-04 21:08:50 +00:00
parent 96dd28efa2
commit 06084cb7e8
1 changed files with 36 additions and 43 deletions
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79
lib/putenv.c
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@ -1,67 +1,59 @@
/* Copyright (C) 1991 Free Software Foundation, Inc.
/* Copyright (C) 1991, 1994 Free Software Foundation, Inc.
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, 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.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <errno.h>
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <errno.h>
#ifndef errno
extern int errno;
#endif
/* Don't include stdlib.h for non-GNU C libraries because some of them
contain conflicting prototypes for getopt.
This needs to come after some library #include
to get __GNU_LIBRARY__ defined. */
#ifdef __GNU_LIBRARY__
#if defined (__GNU_LIBRARY__) || defined (HAVE_STDLIB_H)
#include <stdlib.h>
#else
char *malloc ();
#endif /* GNU C library. */
#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
#endif
#if defined (__GNU_LIBRARY__) || defined (HAVE_STRING_H)
#include <string.h>
#else
#include <strings.h>
#ifndef strchr
#define strchr index
#endif
#ifndef memcpy
#define memcpy(d, s, n) bcopy((s), (d), (n))
#endif
#endif
#ifdef HAVE_UNISTD_H
#if defined (__GNU_LIBRARY__) || defined (HAVE_UNISTD_H)
#include <unistd.h>
#endif
#ifndef NULL
#define NULL 0
#if !defined (__GNU_LIBRARY__) && !defined (HAVE_STRCHR)
#define strchr index
#endif
#if !defined (__GNU_LIBRARY__) && !defined (HAVE_MEMCPY)
#define memcpy(d,s,n) bcopy ((s), (d), (n))
#endif
#if HAVE_GNU_LD
#define environ __environ
#else
extern char **environ;
#endif
/* Put STRING, which is of the form "NAME=VALUE", in the environment. */
int
putenv (string)
const char *string;
{
char *name_end = strchr (string, '=');
const char *const name_end = strchr (string, '=');
register size_t size;
register char **ep;
@ -96,11 +88,12 @@ putenv (string)
char **new_environ = (char **) malloc ((size + 2) * sizeof (char *));
if (new_environ == NULL)
return -1;
memcpy ((char *) new_environ, (char *) environ, size * sizeof (char *));
(void) memcpy ((void *) new_environ, (void *) environ,
size * sizeof (char *));
new_environ[size] = (char *) string;
new_environ[size + 1] = NULL;
if (last_environ != NULL)
free ((char *) last_environ);
free ((void *) last_environ);
last_environ = new_environ;
environ = new_environ;
}