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/*
* SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
* SPDX-FileCopyrightText: 2005 , Tomasz Kłoczko
* SPDX-FileCopyrightText: 2008 , Nicolas François
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <config.h>
#ident "$Id$"
#include <stdio.h>
#include <sys/types.h>
#include <grp.h>
#include <string.h>
#include "alloc.h"
#include "defines.h"
#include "prototypes.h"
#define NFIELDS 4
/*
* list - turn a comma-separated string into an array of (char *)'s
*
* list() converts the comma-separated list of member names into
* an array of character pointers.
*
* FINALLY added dynamic allocation. Still need to fix sgetsgent().
* --marekm
*/
static char **
list(char *s)
{
static char **members = NULL;
static size_t size = 0; /* max members + 1 */
size_t i;
i = 0;
for (;;) {
/* check if there is room for another pointer (to a group
member name, or terminating NULL). */
if (i >= size) {
size = i + 100; /* at least: i + 1 */
members = REALLOCF(members, size, char *);
if (!members) {
size = 0;
return NULL;
}
}
if (!s || s[0] == '\0')
break;
members[i++] = strsep(&s, ",");
}
members[i] = NULL;
return members;
}
struct group *sgetgrent (const char *buf)
{
static char *grpbuf = NULL;
static size_t size = 0;
static char *grpfields[NFIELDS];
static struct group grent;
int i;
char *cp;
if (strlen (buf) + 1 > size) {
/* no need to use realloc() here - just free it and
allocate a larger block */
free (grpbuf);
size = strlen (buf) + 1000; /* at least: strlen(buf) + 1 */
grpbuf = MALLOC(size, char);
if (grpbuf == NULL) {
size = 0;
return NULL;
}
}
strcpy (grpbuf, buf);
cp = strrchr (grpbuf, '\n');
if (NULL != cp) {
*cp = '\0';
}
for (cp = grpbuf, i = 0; (i < NFIELDS) && (NULL != cp); i++)
grpfields[i] = strsep(&cp, ":");
if (i < (NFIELDS - 1) || *grpfields[2] == '\0' || cp != NULL) {
return NULL;
}
grent.gr_name = grpfields[0];
grent.gr_passwd = grpfields[1];
if (get_gid(grpfields[2], &grent.gr_gid) == -1) {
return NULL;
}
grent.gr_mem = list (grpfields[3]);
if (NULL == grent.gr_mem) {
return NULL; /* out of memory */
}
return &grent;
}
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