release/src-rt-6.x.4708/tools/misc/xz/src/common/tuklib_progname.c

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       tuklib_progname.c
   4 /// \brief      Program name to be displayed in messages
   5 //
   6 //  Author:     Lasse Collin
   7 //
   8 //  This file has been put into the public domain.
   9 //  You can do whatever you want with this file.
  10 //
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #include "tuklib_progname.h"
  14 #include <string.h>
  15
  16
  17 #if !HAVE_DECL_PROGRAM_INVOCATION_NAME
  18 char *progname = NULL;
  19 #endif
  20
  21
  22 extern void
  23 tuklib_progname_init(char **argv)
  24 {
  25 #ifdef TUKLIB_DOSLIKE
  26         // On these systems, argv[0] always has the full path and .exe
  27         // suffix even if the user just types the plain program name.
  28         // We modify argv[0] to make it nicer to read.
  29
  30         // Strip the leading path.
  31         char *p = argv[0] + strlen(argv[0]);
  32         while (argv[0] < p && p[-1] != '/' && p[-1] != '\\')
  33                 --p;
  34
  35         argv[0] = p;
  36
  37         // Strip the .exe suffix.
  38         p = strrchr(p, '.');
  39         if (p != NULL)
  40                 *p = '\0';
  41
  42         // Make it lowercase.
  43         for (p = argv[0]; *p != '\0'; ++p)
  44                 if (*p >= 'A' && *p <= 'Z')
  45                         *p = *p - 'A' + 'a';
  46 #endif
  47
  48         progname = argv[0];
  49         return;
  50 }