Damien Miller | 7e6e42f | 2013-12-08 08:23:08 +1100 | [diff] [blame] | 1 | /* $Id: bsd-setres_id.c,v 1.2 2013/12/07 21:23:09 djm Exp $ */ |
Darren Tucker | f96ff18 | 2012-11-05 17:04:37 +1100 | [diff] [blame] | 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> |
Damien Miller | 7e6e42f | 2013-12-08 08:23:08 +1100 | [diff] [blame] | 25 | #include <string.h> |
Darren Tucker | f96ff18 | 2012-11-05 17:04:37 +1100 | [diff] [blame] | 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 |