shadow/lib/putgrent.c

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/*
* Copyright 1990 - 1994, Julianne Frances Haugh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <config.h>
#include <stdio.h>
#include <grp.h>
#include "prototypes.h"
#include "defines.h"
int
putgrent(const struct group *g, FILE *f)
{
char *buf, *cp;
int i;
size_t size;
if (!g || !f)
return -1;
/* calculate the required buffer size (40 is added for the
numeric GID, colons, newline, and terminating NUL). */
size = strlen(g->gr_name) + strlen(g->gr_passwd) + 40;
for (i = 0; g->gr_mem && g->gr_mem[i]; i++)
size += strlen(g->gr_mem[i]) + 1;
buf = malloc(size);
if (!buf)
return -1;
sprintf(buf, "%s:%s:%ld:", g->gr_name, g->gr_passwd, (long) g->gr_gid);
cp = buf + strlen(buf);
for (i = 0; g->gr_mem && g->gr_mem[i]; i++) {
if (i > 0)
*cp++ = ',';
strcpy(cp, g->gr_mem[i]);
cp += strlen(cp);
}
*cp++ = '\n';
*cp = '\0';
if (fputsx(buf, f) == EOF || ferror(f)) {
free(buf);
return -1;
}
free(buf);
return 0;
}