lib/progname.h

   1 /* Program name management.
   2    Copyright (C) 2001-2004, 2006, 2009-2020 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2001.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _PROGNAME_H
  19 #define _PROGNAME_H
  20
  21 /* Programs using this file should do the following in main():
  22      set_program_name (argv[0]);
  23  */
  24
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30
  31 /* String containing name the program is called with.  */
  32 extern const char *program_name;
  33
  34 /* Set program_name, based on argv[0].
  35    argv0 must be a string allocated with indefinite extent, and must not be
  36    modified after this call.  */
  37 extern void set_program_name (const char *argv0);
  38
  39 #if ENABLE_RELOCATABLE
  40
  41 /* Set program_name, based on argv[0], and original installation prefix and
  42    directory, for relocatability.  */
  43 extern void set_program_name_and_installdir (const char *argv0,
  44                                              const char *orig_installprefix,
  45                                              const char *orig_installdir);
  46 #undef set_program_name
  47 #define set_program_name(ARG0) \
  48   set_program_name_and_installdir (ARG0, INSTALLPREFIX, INSTALLDIR)
  49
  50 /* Return the full pathname of the current executable, based on the earlier
  51    call to set_program_name_and_installdir.  Return NULL if unknown.  */
  52 extern char *get_full_program_name (void);
  53
  54 #endif
  55
  56
  57 #ifdef __cplusplus
  58 }
  59 #endif
  60
  61
  62 #endif /* _PROGNAME_H */