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Annotation of embedaddon/libiconv/srclib/progname.c, revision 1.1.1.1

1.1       misho       1: /* Program name management.
                      2:    Copyright (C) 2001-2003, 2005-2009 Free Software Foundation, Inc.
                      3:    Written by Bruno Haible <haible@clisp.cons.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 <http://www.gnu.org/licenses/>.  */
                     17: 
                     18: 
                     19: #include <config.h>
                     20: 
                     21: /* Specification.  */
                     22: #undef ENABLE_RELOCATABLE /* avoid defining set_program_name as a macro */
                     23: #include "progname.h"
                     24: 
                     25: #include <string.h>
                     26: 
                     27: 
                     28: /* String containing name the program is called with.
                     29:    To be initialized by main().  */
                     30: const char *program_name = NULL;
                     31: 
                     32: /* Set program_name, based on argv[0].  */
                     33: void
                     34: set_program_name (const char *argv0)
                     35: {
                     36:   /* libtool creates a temporary executable whose name is sometimes prefixed
                     37:      with "lt-" (depends on the platform).  It also makes argv[0] absolute.
                     38:      But the name of the temporary executable is a detail that should not be
                     39:      visible to the end user and to the test suite.
                     40:      Remove this "<dirname>/.libs/" or "<dirname>/.libs/lt-" prefix here.  */
                     41:   const char *slash;
                     42:   const char *base;
                     43: 
                     44:   slash = strrchr (argv0, '/');
                     45:   base = (slash != NULL ? slash + 1 : argv0);
                     46:   if (base - argv0 >= 7 && strncmp (base - 7, "/.libs/", 7) == 0)
                     47:     {
                     48:       argv0 = base;
                     49:       if (strncmp (base, "lt-", 3) == 0)
                     50:        argv0 = base + 3;
                     51:     }
                     52: 
                     53:   /* But don't strip off a leading <dirname>/ in general, because when the user
                     54:      runs
                     55:          /some/hidden/place/bin/cp foo foo
                     56:      he should get the error message
                     57:          /some/hidden/place/bin/cp: `foo' and `foo' are the same file
                     58:      not
                     59:          cp: `foo' and `foo' are the same file
                     60:    */
                     61: 
                     62:   program_name = argv0;
                     63: }