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/*
* Copyright (c) 1999 Richard Seaman, Jr.
* 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 Richard Seaman, Jr.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RICHARD SEAMAN, Jr. 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.
*
*/
#include <sys/types.h>
#include <stddef.h>
#include <string.h>
#include <errno.h>
#include <grp.h>
#include "pthread.h"
static pthread_mutex_t getgr_mutex = PTHREAD_MUTEX_INITIALIZER;
static int
convert (struct group *ret, struct group *result,
char *buf, int buflen)
{
int len;
int count;
char **gr_mem;
char *buf1;
if (!buf) return -1;
*result = *ret;
result->gr_name = (char *) buf;
/* This is the size. */
len = strlen (ret->gr_name) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->gr_name, ret->gr_name);
result->gr_passwd = (char *) buf;
/* This is the size. */
len = strlen (ret->gr_passwd) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->gr_passwd, ret->gr_passwd);
count = 0;
gr_mem = ret->gr_mem;
while (*gr_mem){
count++;
gr_mem++;
}
len = sizeof (*gr_mem)*(count+1);
if (len > buflen) return -1;
buf1 = buf;
buflen -= len;
buf += len;
gr_mem = ret->gr_mem;
while (*gr_mem){
len = strlen (*gr_mem) + 1;
if (len > buflen) return -1;
buf1 = buf;
strcpy (buf, *gr_mem);
buflen -= len;
buf += len;
buf1 += sizeof (buf1);
gr_mem++;
}
buf1 = NULL;
return 0;
}
int getgrnam_r (const char *name, struct group *result,
char *buffer, size_t buflen,
struct group ** resptr)
{
struct group * p;
int retval;
pthread_mutex_lock (&getgr_mutex);
p = getgrnam (name);
if (p == NULL) {
*resptr = NULL;
retval = ESRCH;
} else
if (convert (p, result, buffer, buflen) != 0) {
*resptr = NULL;
retval = ERANGE;
} else {
*resptr = result;
retval = 0;
}
pthread_mutex_unlock (&getgr_mutex);
return retval;
}
int getgrgid_r (uid_t uid, struct group *result,
char *buffer, size_t buflen,
struct group ** resptr)
{
struct group * p;
int retval;
pthread_mutex_lock (&getgr_mutex);
p = getgrgid (uid);
if (p == NULL) {
*resptr = NULL;
retval = ESRCH;
} else
if (convert (p, result, buffer, buflen) != 0) {
*resptr = NULL;
retval = ERANGE;
} else {
*resptr = result;
retval = 0;
}
pthread_mutex_unlock (&getgr_mutex);
return retval;
}
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