misc/init-misc.c

   1 /* Define and initialize `__progname' et. al.
   2    Copyright (C) 1994-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <string.h>
  20 #include <libc-internal.h>
  21
  22 char *__progname_full = (char *) "";
  23 char *__progname = (char *) "";
  24 weak_alias (__progname_full, program_invocation_name)
  25 weak_alias (__progname, program_invocation_short_name)
  26
  27
  28 void
  29 __init_misc (int argc, char **argv, char **envp)
  30 {
  31   if (argv && argv[0])
  32     {
  33       char *p = strrchr (argv[0], '/');
  34       if (p == NULL)
  35         __progname = argv[0];
  36       else
  37         __progname = p + 1;
  38       __progname_full = argv[0];
  39     }
  40 }