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/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* Neither the name of the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getgrent.c 5.7 (Berkeley) 6/24/90";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <stdio.h>
#include <grp.h>
#define _PATH_GROUP "/etc/group"
static FILE *_gr_fp;
static struct group _gr_group;
static int _gr_stayopen;
static char *_gr_file = _PATH_GROUP;
#define MAXGRP 200
static char *members[MAXGRP];
#define MAXLINELENGTH 1024
static char line[MAXLINELENGTH];
void endgrent();
/*
struct group *
getgrent()
{
if (!_gr_fp && !start_gr() || !grscan(0, 0, (char *)NULL))
return((struct group *)NULL);
return(&_gr_group);
}
struct group *
getgrnam(name)
char *name;
{
int rval;
if (!start_gr())
return((struct group *)NULL);
rval = grscan(1, 0, name);
if (!_gr_stayopen)
endgrent();
return(rval ? &_gr_group : (struct group *)NULL);
}
struct group *
getgrgid(gid)
int gid;
{
int rval;
if (!start_gr())
return((struct group *)NULL);
rval = grscan(1, gid, (char *)NULL);
if (!_gr_stayopen)
endgrent();
return(rval ? &_gr_group : (struct group *)NULL);
}
*/
/* static */
start_gr()
{
if (_gr_fp) {
rewind(_gr_fp);
return(1);
}
return((_gr_fp = fopen(_gr_file, "r")) ? 1 : 0);
}
/*
void setgrent()
{
return(setgroupent(0));
}
*/
setgroupent(stayopen)
int stayopen;
{
if (!start_gr())
return(0);
_gr_stayopen = stayopen;
return(1);
}
/*
void
endgrent()
{
if (_gr_fp) {
(void)fclose(_gr_fp);
_gr_fp = (FILE *)NULL;
}
}
void
setgrfile(file)
char *file;
{
_gr_file = file;
}
*/
/* static */
grscan(search, gid, name)
register int search, gid;
register char *name;
{
register char *cp, **m;
char *bp;
char *fgets(), *strsep(), *index();
for (;;) {
if (!fgets(line, sizeof(line), _gr_fp))
return(0);
bp = line;
/* skip lines that are too big */
if (!index(line, '\n')) {
int ch;
while ((ch = getc(_gr_fp)) != '\n' && ch != EOF)
;
continue;
}
_gr_group.gr_name = strsep(&bp, ":\n");
if (search && name && strcmp(_gr_group.gr_name, name))
continue;
_gr_group.gr_passwd = strsep(&bp, ":\n");
if (!(cp = strsep(&bp, ":\n")))
continue;
_gr_group.gr_gid = atoi(cp);
if (search && name == NULL && _gr_group.gr_gid != gid)
continue;
for (m = _gr_group.gr_mem = members;; ++m) {
if (m == &members[MAXGRP - 1]) {
*m = NULL;
break;
}
if ((*m = strsep(&bp, ", \n")) == NULL)
break;
}
return(1);
}
/* NOTREACHED */
}
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