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