src/src/version.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2009 */
   6 /* Copyright (c) The Exim Maintainers 2010 - 2018 */
   7 /* See the file NOTICE for conditions of use and distribution. */
   8
   9 /* Function for setting up the version string. */
  10
  11 #include "exim.h"
  12
  13 #include "version.h"
  14
  15
  16 /* The header file cnumber.h contains a single line containing the
  17 compilation number, making it easy to have it updated automatically.
  18 Hence the fudgery below to get the number turned into a string, since
  19 we can't use #include inside a macro argument list */
  20
  21 void
  22 version_init(void)
  23 {
  24 static uschar cnumber_buffer[24];
  25 static uschar date_buffer[32];
  26
  27 uschar today[20];
  28 uschar *version_cnumber_format;
  29
  30 int cnumber =
  31 #include "cnumber.h"
  32 ;
  33
  34 /* The odd magic after each of these is so they can be easily found
  35 for automatic patching to standard values when running regression tests.
  36 The reason that version_cnumber_format isn't just written inline in the
  37 sprintf() call is the gcc -Wall warns about a \0 in a format string. */
  38
  39 version_cnumber = cnumber_buffer;
  40 version_cnumber_format = US"%d\0<<eximcnumber>>";
  41 sprintf(CS version_cnumber, CS version_cnumber_format, cnumber);
  42 version_string = US EXIM_VERSION_STR "\0<<eximversion>>";
  43
  44 #ifdef EXIM_BUILD_DATE_OVERRIDE
  45 /* Reproducible build support; build tooling should have given us something looking like
  46  * "25-Feb-2017 20:15:40" in EXIM_BUILD_DATE_OVERRIDE based on $SOURCE_DATE_EPOCH in environ
  47  * per <https://reproducible-builds.org/specs/source-date-epoch/>
  48  */
  49 version_date = date_buffer;
  50 version_date[0] = 0;
  51 Ustrncat(version_date, EXIM_BUILD_DATE_OVERRIDE, sizeof(date_buffer));
  52
  53 #else
  54 Ustrcpy(today, US __DATE__);
  55 if (today[4] == ' ') today[4] = '0';
  56 today[3] = today[6] = '-';
  57
  58 version_date = date_buffer;
  59 version_date[0] = 0;
  60 Ustrncat(version_date, today+4, 3);
  61 Ustrncat(version_date, today, 4);
  62 Ustrncat(version_date, today+7, 4);
  63 Ustrcat(version_date, US" ");
  64 Ustrcat(version_date, US __TIME__);
  65 #endif
  66 }
  67
  68 /* End of version.c */