1 /* $Id: bsd-setres_id.c,v 1.1 2012/11/05 06:04:37 dtucker 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 26 #include "log.h" 27 28 #if !defined(HAVE_SETRESGID) || defined(BROKEN_SETRESGID) 29 int 30 setresgid(gid_t rgid, gid_t egid, gid_t sgid) 31 { 32 int ret = 0, saved_errno; 33 34 if (rgid != sgid) { 35 errno = ENOSYS; 36 return -1; 37 } 38 #if defined(HAVE_SETREGID) && !defined(BROKEN_SETREGID) 39 if (setregid(rgid, egid) < 0) { 40 saved_errno = errno; 41 error("setregid %u: %.100s", rgid, strerror(errno)); 42 errno = saved_errno; 43 ret = -1; 44 } 45 #else 46 if (setegid(egid) < 0) { 47 saved_errno = errno; 48 error("setegid %u: %.100s", (u_int)egid, strerror(errno)); 49 errno = saved_errno; 50 ret = -1; 51 } 52 if (setgid(rgid) < 0) { 53 saved_errno = errno; 54 error("setgid %u: %.100s", rgid, strerror(errno)); 55 errno = saved_errno; 56 ret = -1; 57 } 58 #endif 59 return ret; 60 } 61 #endif 62 63 #if !defined(HAVE_SETRESUID) || defined(BROKEN_SETRESUID) 64 int 65 setresuid(uid_t ruid, uid_t euid, uid_t suid) 66 { 67 int ret = 0, saved_errno; 68 69 if (ruid != suid) { 70 errno = ENOSYS; 71 return -1; 72 } 73 #if defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID) 74 if (setreuid(ruid, euid) < 0) { 75 saved_errno = errno; 76 error("setreuid %u: %.100s", ruid, strerror(errno)); 77 errno = saved_errno; 78 ret = -1; 79 } 80 #else 81 82 # ifndef SETEUID_BREAKS_SETUID 83 if (seteuid(euid) < 0) { 84 saved_errno = errno; 85 error("seteuid %u: %.100s", euid, strerror(errno)); 86 errno = saved_errno; 87 ret = -1; 88 } 89 # endif 90 if (setuid(ruid) < 0) { 91 saved_errno = errno; 92 error("setuid %u: %.100s", ruid, strerror(errno)); 93 errno = saved_errno; 94 ret = -1; 95 } 96 #endif 97 return ret; 98 } 99 #endif 100