libexplain  1.4.D001
libexplain/truncate_on_error.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 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, 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/truncate.h>
00023 #include <libexplain/output.h>
00024 
00025 
00026 int
00027 explain_truncate_on_error(const char *pathname, off_t length)
00028 {
00029     int             result;
00030 
00031     result = truncate(pathname, length);
00032     if (result < 0)
00033     {
00034         int             hold_errno;
00035 
00036         hold_errno = errno;
00037         explain_output_error("%s", explain_errno_truncate(hold_errno,
00038             pathname, length));
00039         errno = hold_errno;
00040     }
00041     return result;
00042 }
00043 
00044 
00045 /* vim: set ts=8 sw=4 et : */