1 /* $Id: bsd-setres_id.c,v 1.2 2013/12/07 21:23:09 djm Exp $ */ 2 3 /* 4 * Copyright (c) 2012 Darren Tucker (dtucker at zip com au). 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include "includes.h" 20 21 #include <sys/types.h> 22 23 #include <stdarg.h> 24 #include <unistd.h> 25 #include <string.h> 26 27 #include "log.h" 28 29 #if !defined(HAVE_SETRESGID) || defined(BROKEN_SETRESGID) 30 int 31 setresgid(gid_t rgid, gid_t egid, gid_t sgid) 32 { 33 int ret = 0, saved_errno; 34 35 if (rgid != sgid) { 36 errno = ENOSYS; 37 return -1; 38 } 39 #if defined(HAVE_SETREGID) && !defined(BROKEN_SETREGID) 40 if (setregid(rgid, egid) < 0) { 41 saved_errno = errno; 42 error("setregid %u: %.100s", rgid, strerror(errno)); 43 errno = saved_errno; 44 ret = -1; 45 } 46 #else 47 if (setegid(egid) < 0) { 48 saved_errno = errno; 49 error("setegid %u: %.100s", (u_int)egid, strerror(errno)); 50 errno = saved_errno; 51 ret = -1; 52 } 53 if (setgid(rgid) < 0) { 54 saved_errno = errno; 55 error("setgid %u: %.100s", rgid, strerror(errno)); 56 errno = saved_errno; 57 ret = -1; 58 } 59 #endif 60 return ret; 61 } 62 #endif 63 64 #if !defined(HAVE_SETRESUID) || defined(BROKEN_SETRESUID) 65 int 66 setresuid(uid_t ruid, uid_t euid, uid_t suid) 67 { 68 int ret = 0, saved_errno; 69 70 if (ruid != suid) { 71 errno = ENOSYS; 72 return -1; 73 } 74 #if defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID) 75 if (setreuid(ruid, euid) < 0) { 76 saved_errno = errno; 77 error("setreuid %u: %.100s", ruid, strerror(errno)); 78 errno = saved_errno; 79 ret = -1; 80 } 81 #else 82 83 # ifndef SETEUID_BREAKS_SETUID 84 if (seteuid(euid) < 0) { 85 saved_errno = errno; 86 error("seteuid %u: %.100s", euid, strerror(errno)); 87 errno = saved_errno; 88 ret = -1; 89 } 90 # endif 91 if (setuid(ruid) < 0) { 92 saved_errno = errno; 93 error("setuid %u: %.100s", ruid, strerror(errno)); 94 errno = saved_errno; 95 ret = -1; 96 } 97 #endif 98 return ret; 99 } 100 #endif 101