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/* $Id: bsd-setres_id.c,v 1.2 2013/12/07 21:23:09 djm Exp $ */
/*
* Copyright (c) 2012 Darren Tucker (dtucker at zip com au).
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#include <sys/types.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include "log.h"
#if !defined(HAVE_SETRESGID) || defined(BROKEN_SETRESGID)
int
setresgid(gid_t rgid, gid_t egid, gid_t sgid)
{
int ret = 0, saved_errno;
if (rgid != sgid) {
errno = ENOSYS;
return -1;
}
#if defined(HAVE_SETREGID) && !defined(BROKEN_SETREGID)
if (setregid(rgid, egid) < 0) {
saved_errno = errno;
error("setregid %u: %.100s", rgid, strerror(errno));
errno = saved_errno;
ret = -1;
}
#else
if (setegid(egid) < 0) {
saved_errno = errno;
error("setegid %u: %.100s", (u_int)egid, strerror(errno));
errno = saved_errno;
ret = -1;
}
if (setgid(rgid) < 0) {
saved_errno = errno;
error("setgid %u: %.100s", rgid, strerror(errno));
errno = saved_errno;
ret = -1;
}
#endif
return ret;
}
#endif
#if !defined(HAVE_SETRESUID) || defined(BROKEN_SETRESUID)
int
setresuid(uid_t ruid, uid_t euid, uid_t suid)
{
int ret = 0, saved_errno;
if (ruid != suid) {
errno = ENOSYS;
return -1;
}
#if defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID)
if (setreuid(ruid, euid) < 0) {
saved_errno = errno;
error("setreuid %u: %.100s", ruid, strerror(errno));
errno = saved_errno;
ret = -1;
}
#else
# ifndef SETEUID_BREAKS_SETUID
if (seteuid(euid) < 0) {
saved_errno = errno;
error("seteuid %u: %.100s", euid, strerror(errno));
errno = saved_errno;
ret = -1;
}
# endif
if (setuid(ruid) < 0) {
saved_errno = errno;
error("setuid %u: %.100s", ruid, strerror(errno));
errno = saved_errno;
ret = -1;
}
#endif
return ret;
}
#endif
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