libexplain  1.4.D001
libexplain/ftime_or_die.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2009-2013 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/time.h>
00021 #include <libexplain/ac/sys/timeb.h>
00022 
00023 #include <libexplain/ftime.h>
00024 #include <libexplain/output.h>
00025 #include <libexplain/is_efault.h>
00026 
00027 
00028 void
00029 explain_ftime_or_die(struct timeb *tp)
00030 {
00031     if (explain_ftime_on_error(tp) < 0)
00032     {
00033         explain_output_exit_failure();
00034     }
00035 }
00036 
00037 
00038 #ifndef HAVE_FTIME
00039 
00040 int
00041 ftime(timebuf)
00042      struct timeb *timebuf;
00043 {
00044     struct timeval tv;
00045     struct timezone tz;
00046 
00047     if (explain_is_efault_pointer(timebuf, sizeof(*timebuf)))
00048     {
00049         errno = EFAULT;
00050         return -1;
00051     }
00052     if (gettimeofday(&tv, &tz) < 0)
00053         return -1;
00054     timebuf->time = tv.tv_sec;
00055     timebuf->millitm = tv.tv_usec / 1000;
00056     timebuf->timezone = tz.tz_minuteswest;
00057     timebuf->dstflag = tz.tz_dsttime;
00058     return 0;
00059 }
00060 
00061 #endif
00062 
00063 
00064 int
00065 explain_ftime_on_error(struct timeb *tp)
00066 {
00067     int             result;
00068 
00069     result = ftime(tp);
00070     if (result < 0)
00071     {
00072         int             hold_errno;
00073 
00074         hold_errno = errno;
00075         explain_output_error("%s", explain_errno_ftime(hold_errno, tp));
00076         errno = hold_errno;
00077     }
00078     return result;
00079 }
00080 
00081 
00082 /* vim: set ts=8 sw=4 et : */