mes/lib/posix/setenv.c
Jan Nieuwenhuizen 3480813038
mescc: Mes C Library: Populate with function tests from scaffold.
* .gitignore: Update.
* build-aux/bootstrap.sh.in: Update.
* build-aux/build-mes.sh: Update.
* build-aux/check-mescc.sh: Update.
* lib/tests/assert/50-assert.c: Move from scaffold/tests/50-assert.c.
* lib/tests/dirent/90-readdir.c: Move from scaffold/tests/99-readdir.c.
* lib/tests/dirent/readdir.dir: Move from scaffold/tests/readdir.dir.
* lib/tests/io/90-stat.c: Move from scaffold/tests/92-stat.c.
* lib/tests/mes/30-oputs.c: Move from scaffold/tests/31-oputs.c.
* lib/tests/mes/50-itoa.c: Move from scaffold/tests/51-itoa.c.
* lib/tests/posix/90-unsetenv.c: Move from scaffold/tests/94-unsetenv.c.
* lib/tests/setjmp/80-setjmp.c: Move from scaffold/tests/80-setjmp.c.
* lib/tests/signal/90-signal.c: Move from scaffold/tests/95-signal.c.
* lib/tests/stdio/70-printf-hello.c: Move from scaffold/tests/70-printf-hello.c.
* lib/tests/stdio/70-printf-simple.c: Move from scaffold/tests/70-printf-simple.c.
* lib/tests/stdio/70-printf.c: Move from scaffold/tests/70-printf.c.
* lib/tests/stdio/80-sscanf.c: Move from scaffold/tests/87-sscanf.c.
* lib/tests/stdio/90-fopen-append.c: Move from scaffold/tests/98-fopen.c.
* lib/tests/stdio/90-fopen.c: Move from scaffold/tests/97-fopen.c.
* lib/tests/stdio/90-fread-fwrite.c: Move from scaffold/tests/93-fread-fwrite.c.
* lib/tests/stdio/90-fseek.c: Move from scaffold/tests/91-fseek.c.
* lib/tests/stdlib/50-getenv.c: Move from lib/tests/stdlib/getenv.c.
* lib/tests/stdlib/50-malloc.c: Move from lib/tests/stdlib/malloc.c.
* lib/tests/stdlib/70-strtoull.c: Move from scaffold/tests/7j-strtoull.c.
* lib/tests/stdlib/80-qsort-dupes.c: Move from scaffold/tests/81-qsort-dupes.c.
* lib/tests/stdlib/80-qsort.c: Move from scaffold/tests/81-qsort.c.
* lib/tests/stdlib/90-strtol.c: Move from scaffold/tests/96-strto.c.
* lib/tests/string/30-strlen.c: Move from scaffold/tests/30-strlen.c.
* lib/tests/string/50-strcmp.c: Move from scaffold/tests/51-strcmp.c.
* lib/tests/string/50-strcpy.c: Move from scaffold/tests/53-strcpy.c.
* lib/tests/string/50-strncmp.c: Move from scaffold/tests/51-strncmp.c.
* lib/tests/string/70-strchr.c: Move from scaffold/tests/70-strchr.c.
* lib/tests/string/80-strncpy.c: Move from scaffold/tests/86-strncpy.c.
* lib/tests/string/80-strrchr.c: Move from scaffold/tests/88-strrchr.c.
* lib/tests/string/90-snprintf.c: Move from scaffold/tests/9a-snprintf.c.
* lib/tests/string/90-strpbrk.c: Move from scaffold/tests/90-strpbrk.c.
* lib/tests/string/90-strspn.c: Move from scaffold/tests/90-strspn.c.
2019-02-24 17:51:53 +01:00

45 lines
1.3 KiB
C

/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes 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 (at
* your option) any later version.
*
* GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
int
setenv (char const* s, char const* v, int overwrite_p)
{
char **p = environ;
int length = strlen (s);
while (*p)
{
if (!strncmp (s, *p, length) && *(*p + length) == '=')
break;
p++;
}
char *entry = malloc (length + strlen (v) + 2);
int end_p = *p == 0;
*p = entry;
strcpy (entry, s);
strcpy (entry + length, "=");
strcpy (entry + length + 1, v);
*(entry + length + strlen (v) + 2) = 0;
if (end_p)
*++p = 0;
return 0;
}