NetBSD/lib/libc/gen/setproctitle.c

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/* $NetBSD: setproctitle.c,v 1.11 1998/02/05 04:15:28 gwr Exp $ */
/*
* Copyright (c) 1994, 1995 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 by Christopher G. Demetriou
* for the NetBSD Project.
* 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.
*/
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#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: setproctitle.c,v 1.11 1998/02/05 04:15:28 gwr Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
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#include <sys/param.h>
#include <sys/types.h>
#include <sys/exec.h>
#include <vm/vm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#ifdef __weak_alias
__weak_alias(setproctitle,_setproctitle);
#endif
#define MAX_PROCTITLE 2048
extern char *__progname; /* Program name, from crt0. */
/*
* For compatibility with old versions of crt0 that didn't define __ps_strings,
* define it as a common here.
*/
struct ps_strings *__ps_strings;
void
#if __STDC__
setproctitle(const char *fmt, ...)
#else
setproctitle(fmt, va_alist)
const char *fmt;
va_dcl
#endif
{
va_list ap;
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static char buf[MAX_PROCTITLE], *bufp = buf;
int used;
#if __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
if (fmt != NULL) {
used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname);
(void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap);
} else
(void)snprintf(buf, MAX_PROCTITLE, "%s", __progname);
va_end(ap);
#ifdef USRSTACK
/*
* For compatibility with old versions of crt0 and old kernels, set
* __ps_strings to a default value if it's null.
* But only if USRSTACK is defined. It might not be defined if
* user-level code can not assume it's a constant (i.e. m68k).
*/
if (__ps_strings == 0)
__ps_strings = PS_STRINGS;
#endif /* USRSTACK */
if (__ps_strings != 0) {
__ps_strings->ps_nargvstr = 1;
__ps_strings->ps_argvstr = &bufp;
}
}