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, 1995, 1996
   5  *
   6  */
   7
   8 /*-
   9  * Copyright (c) 1980, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #ifndef lint
  42 static char sccsid[] = "@(#)unctime.c   8.2 (Berkeley) 6/14/94";
  43 #endif /* not lint */
  44
  45 #include <sys/types.h>
  46
  47 #include <stdio.h>
  48 #include <time.h>
  49 #ifdef __STDC__
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #endif
  53
  54 #ifndef __P
  55 #include <sys/cdefs.h>
  56 #endif
  57
  58 /*
  59  * Convert a ctime(3) format string into a system format date.
  60  * Return the date thus calculated.
  61  *
  62  * Return -1 if the string is not in ctime format.
  63  */
  64
  65 /*
  66  * Offsets into the ctime string to various parts.
  67  */
  68
  69 #define E_MONTH         4
  70 #define E_DAY           8
  71 #define E_HOUR          11
  72 #define E_MINUTE        14
  73 #define E_SECOND        17
  74 #define E_YEAR          20
  75
  76 static  int lookup __P((char *));
  77
  78
  79 time_t
  80 unctime(str)
  81         char *str;
  82 {
  83         struct tm then;
  84         char dbuf[26];
  85
  86         (void) strncpy(dbuf, str, sizeof(dbuf) - 1);
  87         dbuf[sizeof(dbuf) - 1] = '\0';
  88         dbuf[E_MONTH+3] = '\0';
  89         if ((then.tm_mon = lookup(&dbuf[E_MONTH])) < 0)
  90                 return (-1);
  91         then.tm_mday = atoi(&dbuf[E_DAY]);
  92         then.tm_hour = atoi(&dbuf[E_HOUR]);
  93         then.tm_min = atoi(&dbuf[E_MINUTE]);
  94         then.tm_sec = atoi(&dbuf[E_SECOND]);
  95         then.tm_year = atoi(&dbuf[E_YEAR]) - 1900;
  96         then.tm_isdst = -1;
  97         return(mktime(&then));
  98 }
  99
 100 static char months[] =
 101         "JanFebMarAprMayJunJulAugSepOctNovDec";
 102
 103 static int
 104 lookup(str)
 105         char *str;
 106 {
 107         register char *cp, *cp2;
 108
 109         for (cp = months, cp2 = str; *cp != '\0'; cp += 3)
 110                 if (strncmp(cp, cp2, 3) == 0)
 111                         return((cp-months) / 3);
 112         return(-1);
 113 }