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