/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Get Supplementary IDs
*
* @ingroup libcsupport
*/
/*
* COPYRIGHT (C) 1989-1999 On-Line Applications Research Corporation (OAR).
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <grp.h>
#include <pwd.h>
#include <string.h>
#include <unistd.h>
#include <rtems/seterr.h>
/**
* 4.2.3 Get Supplementary IDs, P1003.1b-1993, p. 86
*/
int getgroups(
int gidsetsize,
gid_t grouplist[]
)
{
int rv;
struct passwd pwd;
struct passwd *pwd_res;
char buf[256];
gid_t gid;
const char *user;
struct group *grp;
rv = getpwuid_r(getuid(), &pwd, &buf[0], sizeof(buf), &pwd_res);
if (rv != 0) {
return rv;
}
gid = pwd.pw_gid;
user = pwd.pw_name;
setgrent();
while ((grp = getgrent()) != NULL) {
char **mem = &grp->gr_mem[0];
if (grp->gr_gid == gid) {
continue;
}
while (*mem != NULL) {
if (strcmp(*mem, user) == 0) {
if (rv < gidsetsize) {
grouplist[rv] = grp->gr_gid;
}
++rv;
break;
}
++mem;
}
}
endgrent();
if (gidsetsize == 0 || rv <= gidsetsize) {
return rv;
} else {
rtems_set_errno_and_return_minus_one(EINVAL);
}
}
