shadow/lib/grpack.c

96 lines
2.7 KiB
C

/*
* Copyright 1990, 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 "rcsid.h"
RCSID("$Id: grpack.c,v 1.3 1997/12/07 23:26:52 marekm Exp $")
#include <stdio.h>
#include <grp.h>
#include "defines.h"
int
gr_pack(const struct group *group, char *buf)
{
char *cp;
int i;
cp = buf;
strcpy (cp, group->gr_name);
cp += strlen (cp) + 1;
strcpy (cp, group->gr_passwd);
cp += strlen (cp) + 1;
memcpy (cp, (const char *) &group->gr_gid, sizeof group->gr_gid);
cp += sizeof group->gr_gid;
for (i = 0;group->gr_mem[i];i++) {
strcpy (cp, group->gr_mem[i]);
cp += strlen (cp) + 1;
}
*cp++ = '\0';
return cp - buf;
}
int
gr_unpack(char *buf, int len, struct group *group)
{
char *org = buf;
int i;
group->gr_name = buf;
buf += strlen (buf) + 1;
if (buf - org > len)
return -1;
group->gr_passwd = buf;
buf += strlen (buf) + 1;
if (buf - org > len)
return -1;
memcpy ((char *) &group->gr_gid, (char *) buf, sizeof group->gr_gid);
buf += sizeof group->gr_gid;
if (buf - org > len)
return -1;
for (i = 0;*buf && i < 1024;i++) {
group->gr_mem[i] = buf;
buf += strlen (buf) + 1;
if (buf - org > len)
return -1;
}
group->gr_mem[i] = (char *) 0;
return 0;
}