libexplain  1.4.D001
libexplain/setregid_or_die.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2012, 2013 Peter Miller
00004  *
00005  * This program is free software; you can redistribute it and/or modify it
00006  * under the terms of the GNU Lesser General Public License as published by
00007  * the Free Software Foundation; either version 3 of the License, or (at
00008  * your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful, but
00011  * WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
00013  * General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public License
00016  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00017  */
00018 
00019 #include <libexplain/ac/errno.h>
00020 #include <libexplain/ac/unistd.h>
00021 
00022 #include <libexplain/output.h>
00023 #include <libexplain/setregid.h>
00024 
00025 
00026 void
00027 explain_setregid_or_die(gid_t rgid, gid_t egid)
00028 {
00029     if (explain_setregid_on_error(rgid, egid) < 0)
00030     {
00031         explain_output_exit_failure();
00032     }
00033 }
00034 
00035 
00036 int
00037 explain_setregid_on_error(gid_t rgid, gid_t egid)
00038 {
00039     int             result;
00040 
00041 #ifdef HAVE_SETREGID
00042     result = setregid(rgid, egid);
00043 #else
00044     errno = ENOSYS;
00045     result = -1;
00046 #endif
00047     if (result < 0)
00048     {
00049         int             hold_errno;
00050 
00051         hold_errno = errno;
00052         explain_output_error
00053         (
00054             "%s",
00055             explain_errno_setregid(hold_errno, rgid, egid)
00056         );
00057         errno = hold_errno;
00058     }
00059     return result;
00060 }
00061 
00062 
00063 /* vim: set ts=8 sw=4 et : */