/crypto/heimdal/lib/roken/setprogname.c

 1/*
 2 * Copyright (c) 1995-2004 Kungliga Tekniska Hรถgskolan
 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
39extern const char *__progname;
40#endif
41
42#ifndef HAVE_SETPROGNAME
43
44ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
45setprogname(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 */