libexplain  1.4.D001
libexplain/pathconf_on_error.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2009, 2010, 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,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Lesser 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/pathconf.h>
00023 #include <libexplain/output.h>
00024 
00025 
00026 long
00027 explain_pathconf_on_error(const char *pathname, int name)
00028 {
00029     long            result;
00030     int             hold_errno;
00031 
00032     hold_errno = errno;
00033 #ifdef IRIX
00034     errno = EINVAL; /* IRIX fails to set EINVAL ever */
00035 #else
00036     errno = 0;
00037 #endif
00038     result = pathconf(pathname, name);
00039     if (result == -1 && errno != 0)
00040     {
00041         hold_errno = errno;
00042         explain_output_message
00043         (
00044             explain_errno_pathconf(hold_errno, pathname, name)
00045         );
00046     }
00047     errno = hold_errno;
00048     return result;
00049 }
00050 
00051 
00052 /* vim: set ts=8 sw=4 et : */