src/external/heimdal/roken/setprogname.c

   1 /*
   2  * Copyright (c) 1995-2004 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <config.h>
  35
  36 #include "roken.h"
  37
  38 #ifndef HAVE___PROGNAME
  39 extern const char *__progname;
  40 #endif
  41
  42 #ifndef HAVE_SETPROGNAME
  43
  44 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
  45 setprogname(const char *argv0)
  46 {
  47
  48 #ifndef HAVE___PROGNAME
  49
  50     const char *p;
  51     if(argv0 == NULL)
  52         return;
  53     p = strrchr(argv0, '/');
  54
  55 #ifdef BACKSLASH_PATH_DELIM
  56     {
  57         const char * pb;
  58
  59         pb = strrchr((p != NULL)? p : argv0, '\\');
  60         if (pb != NULL)
  61             p = pb;
  62     }
  63 #endif
  64
  65     if(p == NULL)
  66         p = argv0;
  67     else
  68         p++;
  69
  70 #ifdef _WIN32
  71     {
  72         char * fn = strdup(p);
  73         char * ext;
  74
  75         strlwr(fn);
  76         ext = strrchr(fn, '.');
  77         if (ext != NULL && !strcmp(ext, ".exe"))
  78             *ext = '\0';
  79
  80         __progname = fn;
  81     }
  82 #else
  83
  84     __progname = p;
  85
  86 #endif
  87
  88 #endif  /* HAVE___PROGNAME */
  89 }
  90
  91 #endif /* HAVE_SETPROGNAME */