src/libopts/time.c

   1
   2 /**
   3  * \file time.c
   4  *
   5  *  Time-stamp:      "2012-01-29 12:52:31 bkorb"
   6  *
   7  *  This file is part of AutoOpts, a companion to AutoGen.
   8  *  AutoOpts is free software.
   9  *  AutoOpts is Copyright (c) 1992-2012 by Bruce Korb - all rights reserved
  10  *
  11  *  AutoOpts is available under any one of two licenses.  The license
  12  *  in use must be one of these two and the choice is under the control
  13  *  of the user of the license.
  14  *
  15  *   The GNU Lesser General Public License, version 3 or later
  16  *      See the files "COPYING.lgplv3" and "COPYING.gplv3"
  17  *
  18  *   The Modified Berkeley Software Distribution License
  19  *      See the file "COPYING.mbsd"
  20  *
  21  *  These files have the following md5sums:
  22  *
  23  *  43b91e8ca915626ed3818ffb1b71248b pkg/libopts/COPYING.gplv3
  24  *  06a1a2e4760c90ea5e1dad8dfaac4d39 pkg/libopts/COPYING.lgplv3
  25  *  66a5cedaf62c4b2637025f049f9b826f pkg/libopts/COPYING.mbsd
  26  */
  27
  28 /*=export_func  optionTimeVal
  29  * private:
  30  *
  31  * what:  process an option with a time duration.
  32  * arg:   + tOptions* + pOpts    + program options descriptor +
  33  * arg:   + tOptDesc* + pOptDesc + the descriptor for this arg +
  34  *
  35  * doc:
  36  *  Decipher a time duration value.
  37 =*/
  38 void
  39 optionTimeVal(tOptions * pOpts, tOptDesc * pOD)
  40 {
  41     time_t val;
  42
  43     if ((pOD->fOptState & OPTST_RESET) != 0)
  44         return;
  45
  46     val = parse_duration(pOD->optArg.argString);
  47     if (val == BAD_TIME) {
  48         fprintf(stderr, zNotDuration, pOpts->pzProgName, pOD->optArg.argString);
  49         if ((pOpts->fOptSet & OPTPROC_ERRSTOP) != 0)
  50             (*(pOpts->pUsageProc))(pOpts, EXIT_FAILURE);
  51     }
  52
  53     if (pOD->fOptState & OPTST_ALLOC_ARG) {
  54         AGFREE(pOD->optArg.argString);
  55         pOD->fOptState &= ~OPTST_ALLOC_ARG;
  56     }
  57
  58     pOD->optArg.argInt = (unsigned long)val;
  59 }
  60
  61 /*=export_func  optionTimeDate
  62  * private:
  63  *
  64  * what:  process an option with a time and date.
  65  * arg:   + tOptions* + pOpts    + program options descriptor +
  66  * arg:   + tOptDesc* + pOptDesc + the descriptor for this arg +
  67  *
  68  * doc:
  69  *  Decipher a time and date value.
  70 =*/
  71 void
  72 optionTimeDate(tOptions * pOpts, tOptDesc * pOD)
  73 {
  74 #if defined(HAVE_GETDATE_R) && defined(HAVE_PUTENV)
  75     if ((! HAS_pzPkgDataDir(pOpts)) || (pOpts->pzPkgDataDir == NULL))
  76         goto default_action;
  77
  78     /*
  79      *  Export the DATEMSK environment variable.  getdate_r() uses it to
  80      *  find the file with the strptime formats.  If we cannot find the file
  81      *  we need ($PKGDATADIR/datemsk), then fall back to just a time duration.
  82      */
  83     {
  84         static char * envptr = NULL;
  85
  86         if (envptr == NULL) {
  87             static char const fmt[] = "DATEMSK=%s/datemsk";
  88             envptr = AGALOC(sizeof(fmt) + strlen(pOpts->pzPkgDataDir), fmt);
  89             sprintf(envptr, fmt, pOpts->pzPkgDataDir);
  90
  91             putenv(envptr);
  92         }
  93
  94         if (access(envptr+8, R_OK) != 0)
  95             goto default_action;
  96     }
  97
  98     /*
  99      *  Convert the date to a time since the epoch and stash it in a long int.
 100      */
 101     {
 102         struct tm stm;
 103         time_t tm;
 104
 105         if (getdate_r(pOD->optArg.argString, &stm) != 0) {
 106             fprintf(stderr, zNotDate, pOpts->pzProgName,
 107                     pOD->optArg.argString);
 108             if ((pOpts->fOptSet & OPTPROC_ERRSTOP) != 0)
 109                 (*(pOpts->pUsageProc))(pOpts, EXIT_FAILURE);
 110             return;
 111         }
 112
 113         tm = mktime(&stm);
 114
 115         if (pOD->fOptState & OPTST_ALLOC_ARG) {
 116             AGFREE(pOD->optArg.argString);
 117             pOD->fOptState &= ~OPTST_ALLOC_ARG;
 118         }
 119
 120         pOD->optArg.argInt = tm;
 121     }
 122     return;
 123
 124 default_action:
 125
 126 #endif
 127     optionTimeVal(pOpts, pOD);
 128     if (pOD->optArg.argInt != BAD_TIME)
 129         pOD->optArg.argInt += (unsigned long)time(NULL);
 130 }
 131 /*
 132  * Local Variables:
 133  * mode: C
 134  * c-file-style: "stroustrup"
 135  * indent-tabs-mode: nil
 136  * End:
 137  * end of autoopts/time.c */