dump/unctime.c

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <pop@cybercable.fr>, 1999
   6  *
   7  */
   8
   9 /*-
  10  * Copyright (c) 1980, 1993
  11  *      The Regents of the University of California.  All rights reserved.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  */
  41
  42 #ifndef lint
  43 #if 0
  44 static char sccsid[] = "@(#)unctime.c   8.2 (Berkeley) 6/14/94";
  45 #endif
  46 static const char rcsid[] =
  47         "$Id: unctime.c,v 1.2 1999/10/11 12:53:23 stelian Exp $";
  48 #endif /* not lint */
  49
  50 #include <time.h>
  51 #ifdef __STDC__
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #endif
  55
  56 /*
  57  * Convert a ctime(3) format string into a system format date.
  58  * Return the date thus calculated.
  59  *
  60  * Return -1 if the string is not in ctime format.
  61  */
  62
  63 /*
  64  * Offsets into the ctime string to various parts.
  65  */
  66
  67 #define E_MONTH         4
  68 #define E_DAY           8
  69 #define E_HOUR          11
  70 #define E_MINUTE        14
  71 #define E_SECOND        17
  72 #define E_YEAR          20
  73
  74 static  int lookup __P((char *));
  75
  76
  77 time_t
  78 unctime(str)
  79         char *str;
  80 {
  81         struct tm then;
  82         char dbuf[26];
  83
  84         (void) strncpy(dbuf, str, sizeof(dbuf) - 1);
  85         dbuf[sizeof(dbuf) - 1] = '\0';
  86         dbuf[E_MONTH+3] = '\0';
  87         if ((then.tm_mon = lookup(&dbuf[E_MONTH])) < 0)
  88                 return (-1);
  89         then.tm_mday = atoi(&dbuf[E_DAY]);
  90         then.tm_hour = atoi(&dbuf[E_HOUR]);
  91         then.tm_min = atoi(&dbuf[E_MINUTE]);
  92         then.tm_sec = atoi(&dbuf[E_SECOND]);
  93         then.tm_year = atoi(&dbuf[E_YEAR]) - 1900;
  94         then.tm_isdst = -1;
  95         return(mktime(&then));
  96 }
  97
  98 static char months[] =
  99         "JanFebMarAprMayJunJulAugSepOctNovDec";
 100
 101 static int
 102 lookup(str)
 103         char *str;
 104 {
 105         register char *cp, *cp2;
 106
 107         for (cp = months, cp2 = str; *cp != '\0'; cp += 3)
 108                 if (strncmp(cp, cp2, 3) == 0)
 109                         return((cp-months) / 3);
 110         return(-1);
 111 }