mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-12-28 07:29:34 +00:00
448 lines
9.2 KiB
C
448 lines
9.2 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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 BY THE REGENTS 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 THE REGENTS 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.
|
|
*/
|
|
|
|
/*
|
|
* This file is formatted with tab stops every 8 columns.
|
|
*
|
|
* $Id: getgrent.c,v 1.2 1997/09/21 06:05:00 gdr Exp $
|
|
*/
|
|
|
|
#ifdef __ORCAC__
|
|
segment "libc_gen__";
|
|
#endif
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)getgrent.c 8.2 (Berkeley) 3/21/94";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <paths.h>
|
|
#include <grp.h>
|
|
|
|
static FILE *_gr_fp;
|
|
static struct group _gr_group;
|
|
static int _gr_stayopen;
|
|
static int grscan(register int search, register int gid,
|
|
register const char *name);
|
|
static int start_gr(void);
|
|
#ifdef YP
|
|
#include <rpc/rpc.h>
|
|
#include <rpcsvc/yp_prot.h>
|
|
#include <rpcsvc/ypclnt.h>
|
|
static int _gr_stepping_yp;
|
|
static int _gr_yp_enabled;
|
|
static int _getypgroup(struct group *, const char *, char *);
|
|
static int _nextypgroup(struct group *);
|
|
#endif
|
|
|
|
#define MAXGRP 200
|
|
static char *members[MAXGRP];
|
|
#define MAXLINELENGTH 1024
|
|
static char line[MAXLINELENGTH];
|
|
|
|
struct group *
|
|
getgrent(void)
|
|
{
|
|
if (!_gr_fp && !start_gr()) {
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef YP
|
|
if (_gr_stepping_yp) {
|
|
if (_nextypgroup(&_gr_group))
|
|
return(&_gr_group);
|
|
}
|
|
tryagain:
|
|
#endif
|
|
|
|
if (!grscan(0, 0, NULL))
|
|
return(NULL);
|
|
#ifdef YP
|
|
if(_gr_group.gr_name[0] == '+' && _gr_group.gr_name[1]) {
|
|
_getypgroup(&_gr_group, &_gr_group.gr_name[1],
|
|
"group.byname");
|
|
} else if(_gr_group.gr_name[0] == '+') {
|
|
if (!_nextypgroup(&_gr_group))
|
|
goto tryagain;
|
|
else
|
|
return(&_gr_group);
|
|
}
|
|
#endif
|
|
return(&_gr_group);
|
|
}
|
|
|
|
struct group *
|
|
getgrnam(const char *name)
|
|
{
|
|
int rval;
|
|
|
|
if (!start_gr())
|
|
return(NULL);
|
|
#ifdef YP
|
|
tryagain:
|
|
#endif
|
|
rval = grscan(1, 0, name);
|
|
#ifdef YP
|
|
if(rval == -1 && (_gr_yp_enabled < 0 || (_gr_yp_enabled &&
|
|
_gr_group.gr_name[0] == '+'))) {
|
|
if (!(rval = _getypgroup(&_gr_group, name, "group.byname")))
|
|
goto tryagain;
|
|
}
|
|
#endif
|
|
if (!_gr_stayopen)
|
|
endgrent();
|
|
return(rval ? &_gr_group : NULL);
|
|
}
|
|
|
|
struct group *
|
|
#ifdef __STDC__
|
|
getgrgid(gid_t gid)
|
|
#else
|
|
getgrgid(gid)
|
|
gid_t gid;
|
|
#endif
|
|
{
|
|
int rval;
|
|
|
|
if (!start_gr())
|
|
return(NULL);
|
|
#ifdef YP
|
|
tryagain:
|
|
#endif
|
|
rval = grscan(1, gid, NULL);
|
|
#ifdef YP
|
|
if(rval == -1 && _gr_yp_enabled) {
|
|
char buf[16];
|
|
snprintf(buf, sizeof buf, "%d", (unsigned)gid);
|
|
if (!(rval = _getypgroup(&_gr_group, buf, "group.bygid")))
|
|
goto tryagain;
|
|
}
|
|
#endif
|
|
if (!_gr_stayopen)
|
|
endgrent();
|
|
return(rval ? &_gr_group : NULL);
|
|
}
|
|
|
|
static int
|
|
start_gr(void)
|
|
{
|
|
if (_gr_fp) {
|
|
rewind(_gr_fp);
|
|
return(1);
|
|
}
|
|
_gr_fp = fopen(_PATH_GROUP, "r");
|
|
if(!_gr_fp) return 0;
|
|
#ifdef YP
|
|
/*
|
|
* This is a disgusting hack, used to determine when YP is enabled.
|
|
* This would be easier if we had a group database to go along with
|
|
* the password database.
|
|
*/
|
|
{
|
|
char *line;
|
|
size_t linelen;
|
|
_gr_yp_enabled = 0;
|
|
while((line = fgetln(_gr_fp, &linelen)) != NULL) {
|
|
if(line[0] == '+') {
|
|
if(line[1] && !_gr_yp_enabled) {
|
|
_gr_yp_enabled = 1;
|
|
} else {
|
|
_gr_yp_enabled = -1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
rewind(_gr_fp);
|
|
}
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
setgrent(void)
|
|
{
|
|
return(setgroupent(0));
|
|
}
|
|
|
|
int
|
|
setgroupent(int stayopen)
|
|
{
|
|
if (!start_gr())
|
|
return(0);
|
|
_gr_stayopen = stayopen;
|
|
#ifdef YP
|
|
_gr_stepping_yp = 0;
|
|
#endif
|
|
return(1);
|
|
}
|
|
|
|
void
|
|
endgrent(void)
|
|
{
|
|
#ifdef YP
|
|
_gr_stepping_yp = 0;
|
|
#endif
|
|
if (_gr_fp) {
|
|
(void)fclose(_gr_fp);
|
|
_gr_fp = NULL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
grscan(register int search, register int gid, register const char *name)
|
|
{
|
|
register char *cp, **m;
|
|
char *bp;
|
|
#ifdef YP
|
|
int _ypfound = 0;
|
|
#endif
|
|
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;
|
|
}
|
|
if ((_gr_group.gr_name = strsep(&bp, ":\n")) == NULL)
|
|
break;
|
|
#ifdef YP
|
|
/*
|
|
* XXX We need to be careful to avoid proceeding
|
|
* past this point under certain circumstances or
|
|
* we risk dereferencing null pointers down below.
|
|
*/
|
|
if (_gr_group.gr_name[0] == '+') {
|
|
if (strlen(_gr_group.gr_name) == 1) {
|
|
switch(search) {
|
|
case 0:
|
|
return(1);
|
|
case 1:
|
|
return(-1);
|
|
default:
|
|
return(0);
|
|
}
|
|
} else {
|
|
if (!_getypgroup(&_gr_group, &_gr_group.gr_name[1],
|
|
"group.byname"))
|
|
continue;
|
|
/* We're going to override -- tell the world. */
|
|
members[0] = NULL;
|
|
_ypfound++;
|
|
}
|
|
}
|
|
#else
|
|
if (_gr_group.gr_name[0] == '+')
|
|
continue;
|
|
#endif /* YP */
|
|
if (search && name) {
|
|
if(strcmp(_gr_group.gr_name, name)) {
|
|
continue;
|
|
}
|
|
}
|
|
if ((_gr_group.gr_passwd = strsep(&bp, ":\n")) == NULL)
|
|
break;;
|
|
if (!(cp = strsep(&bp, ":\n")))
|
|
continue;
|
|
#ifdef YP
|
|
if (!_ypfound)
|
|
#endif
|
|
_gr_group.gr_gid = atoi(cp);
|
|
if (search && name == NULL && _gr_group.gr_gid != gid)
|
|
continue;
|
|
cp = NULL;
|
|
for (m = _gr_group.gr_mem = members;; bp++) {
|
|
if (m == &members[MAXGRP - 1])
|
|
break;
|
|
if (*bp == ',') {
|
|
if (cp) {
|
|
*bp = '\0';
|
|
*m++ = cp;
|
|
cp = NULL;
|
|
}
|
|
} else if (*bp == '\0' || *bp == '\n' || *bp == ' ') {
|
|
if (cp) {
|
|
*bp = '\0';
|
|
*m++ = cp;
|
|
}
|
|
break;
|
|
} else if (cp == NULL)
|
|
cp = bp;
|
|
}
|
|
*m = NULL;
|
|
return(1);
|
|
}
|
|
/* NOTREACHED */
|
|
return (0);
|
|
}
|
|
|
|
#ifdef YP
|
|
|
|
static int
|
|
_gr_breakout_yp(struct group *gr, char *result)
|
|
{
|
|
char *s, *cp;
|
|
char **m;
|
|
|
|
/*
|
|
* XXX If 's' ends up being a NULL pointer, punt on this group.
|
|
* It means the NIS group entry is badly formatted and should
|
|
* be skipped.
|
|
*/
|
|
if ((s = strsep(&result, ":")) == NULL) return 0; /* name */
|
|
gr->gr_name = s;
|
|
|
|
if ((s = strsep(&result, ":")) == NULL) return 0; /* password */
|
|
gr->gr_passwd = s;
|
|
|
|
if ((s = strsep(&result, ":")) == NULL) return 0; /* gid */
|
|
gr->gr_gid = atoi(s);
|
|
|
|
if ((s = result) == NULL) return 0;
|
|
cp = 0;
|
|
|
|
for (m = _gr_group.gr_mem = members; /**/; s++) {
|
|
if (m == &members[MAXGRP - 1]) {
|
|
break;
|
|
}
|
|
if (*s == ',') {
|
|
if (cp) {
|
|
*s = '\0';
|
|
*m++ = cp;
|
|
cp = NULL;
|
|
}
|
|
} else if (*s == '\0' || *s == '\n' || *s == ' ') {
|
|
if (cp) {
|
|
*s = '\0';
|
|
*m++ = cp;
|
|
}
|
|
break;
|
|
} else if (cp == NULL) {
|
|
cp = s;
|
|
}
|
|
}
|
|
*m = NULL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static char *_gr_yp_domain;
|
|
|
|
static int
|
|
_getypgroup(struct group *gr, const char *name, char *map)
|
|
{
|
|
char *result, *s;
|
|
static char resultbuf[1024];
|
|
int resultlen;
|
|
|
|
if(!_gr_yp_domain) {
|
|
if(yp_get_default_domain(&_gr_yp_domain))
|
|
return 0;
|
|
}
|
|
|
|
if(yp_match(_gr_yp_domain, map, name, strlen(name),
|
|
&result, &resultlen))
|
|
return 0;
|
|
|
|
s = strchr(result, '\n');
|
|
if(s) *s = '\0';
|
|
|
|
if(resultlen >= sizeof resultbuf) return 0;
|
|
strcpy(resultbuf, result);
|
|
result = resultbuf;
|
|
return(_gr_breakout_yp(gr, resultbuf));
|
|
|
|
}
|
|
|
|
|
|
static int
|
|
_nextypgroup(struct group *gr)
|
|
{
|
|
static char *key;
|
|
static int keylen;
|
|
char *lastkey, *result;
|
|
static char resultbuf[1024];
|
|
int resultlen;
|
|
int rv;
|
|
|
|
if(!_gr_yp_domain) {
|
|
if(yp_get_default_domain(&_gr_yp_domain))
|
|
return 0;
|
|
}
|
|
|
|
if(!_gr_stepping_yp) {
|
|
if(key) free(key);
|
|
rv = yp_first(_gr_yp_domain, "group.byname",
|
|
&key, &keylen, &result, &resultlen);
|
|
if(rv) {
|
|
return 0;
|
|
}
|
|
_gr_stepping_yp = 1;
|
|
goto unpack;
|
|
} else {
|
|
tryagain:
|
|
lastkey = key;
|
|
rv = yp_next(_gr_yp_domain, "group.byname", key, keylen,
|
|
&key, &keylen, &result, &resultlen);
|
|
free(lastkey);
|
|
unpack:
|
|
if(rv) {
|
|
_gr_stepping_yp = 0;
|
|
return 0;
|
|
}
|
|
|
|
if(resultlen > sizeof(resultbuf)) {
|
|
free(result);
|
|
goto tryagain;
|
|
}
|
|
|
|
strcpy(resultbuf, result);
|
|
free(result);
|
|
if((result = strchr(resultbuf, '\n')) != NULL)
|
|
*result = '\0';
|
|
if (_gr_breakout_yp(gr, resultbuf))
|
|
return(1);
|
|
else
|
|
goto tryagain;
|
|
}
|
|
}
|
|
|
|
#endif /* YP */
|