chpass.tproj/util.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*-
  25  * Copyright (c) 1988, 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #include <sys/types.h>
  58
  59 #include <ctype.h>
  60 #include <pwd.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64 #include <time.h>
  65 #include <tzfile.h>
  66 #include <unistd.h>
  67
  68 #include "chpass.h"
  69 #include "pathnames.h"
  70
  71 static int dmsize[] =
  72         { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
  73 static char *months[] =
  74         { "January", "February", "March", "April", "May", "June",
  75           "July", "August", "September", "October", "November",
  76           "December", NULL };
  77
  78 char *
  79 ttoa(tval)
  80         time_t tval;
  81 {
  82         struct tm *tp;
  83         static char tbuf[50];
  84
  85         if (tval) {
  86                 tp = localtime(&tval);
  87                 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon],
  88                     tp->tm_mday, tp->tm_year + TM_YEAR_BASE);
  89         }
  90         else
  91                 *tbuf = '\0';
  92         return (tbuf);
  93 }
  94
  95 int
  96 atot(p, store)
  97         char *p;
  98         time_t *store;
  99 {
 100         static struct tm *lt;
 101         char *t, **mp;
 102         time_t tval;
 103         int day, month, year;
 104
 105         if (!*p) {
 106                 *store = 0;
 107                 return (0);
 108         }
 109         if (!lt) {
 110                 unsetenv("TZ");
 111                 (void)time(&tval);
 112                 lt = localtime(&tval);
 113         }
 114         if (!(t = strtok(p, " \t")))
 115                 goto bad;
 116         for (mp = months;; ++mp) {
 117                 if (!*mp)
 118                         goto bad;
 119                 if (!strncasecmp(*mp, t, 3)) {
 120                         month = mp - months + 1;
 121                         break;
 122                 }
 123         }
 124         if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
 125                 goto bad;
 126         day = atoi(t);
 127         if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
 128                 goto bad;
 129         year = atoi(t);
 130         if (day < 1 || day > 31 || month < 1 || month > 12 || !year)
 131                 goto bad;
 132         if (year < 100)
 133                 year += TM_YEAR_BASE;
 134         if (year <= EPOCH_YEAR)
 135 bad:            return (1);
 136         tval = isleap(year) && month > 2;
 137         for (--year; year >= EPOCH_YEAR; --year)
 138                 tval += isleap(year) ?
 139                     DAYSPERLYEAR : DAYSPERNYEAR;
 140         while (--month)
 141                 tval += dmsize[month];
 142         tval += day;
 143         tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN;
 144         tval -= lt->tm_gmtoff;
 145         *store = tval;
 146         return (0);
 147 }
 148
 149 char *
 150 ok_shell(name)
 151         char *name;
 152 {
 153         char *p, *sh;
 154
 155         setusershell();
 156         while (sh = getusershell()) {
 157                 if (!strcmp(name, sh))
 158                         return (name);
 159                 /* allow just shell name, but use "real" path */
 160                 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
 161                         return (sh);
 162         }
 163         return (NULL);
 164 }