minix/lib/libc/other/getprogname.c

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/* $NetBSD: getprogname.c,v 1.3 2003/07/26 19:24:42 salo Exp $ */
/*
* Copyright (c) 2001 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the
* NetBSD Project. See http://www.NetBSD.org/ for
* information about NetBSD.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: getprogname.c,v 1.3 2003/07/26 19:24:42 salo Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <stdlib.h>
#include <string.h>
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#if defined(__ELF__)
extern const char *__progname;
const char *
getprogname(void)
{
return (__progname);
}
void
setprogname(const char *progname)
{
const char *p;
p = strrchr(progname, '/');
if (p != NULL)
__progname = p + 1;
else
__progname = progname;
}
#else
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static const char *theprogname = NULL;
extern const char **__prognamep; /* Copy of argv[]. */
extern int __argc; /* Copy of argc. */
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const char *
getprogname(void)
{
const char *pn = NULL, *component;
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if(theprogname)
return theprogname;
if(__argc > 0 && __prognamep)
pn = __prognamep[0];
else
return NULL;
if((component=strrchr(pn, '/')))
return component+1;
return pn;
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}
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void
setprogname(const char *newprogname)
{
theprogname = newprogname;
}
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#endif