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/* $OpenBSD: setproctitle.c,v 1.15 2016/03/13 18:34:20 guenther 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.
*/
#include <sys/types.h>
#include <sys/exec.h>
#include <sys/sysctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#define MAX_PROCTITLE 2048
void
setproctitle(const char *fmt, ...)
{
static struct ps_strings *ps;
va_list ap;
static char buf[MAX_PROCTITLE], *bufp = buf;
int used;
va_start(ap, fmt);
if (fmt != NULL) {
used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname);
if (used >= MAX_PROCTITLE)
used = MAX_PROCTITLE - 1;
else if (used < 0)
used = 0;
(void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap);
} else
(void)snprintf(buf, MAX_PROCTITLE, "%s", __progname);
va_end(ap);
if (ps == NULL) {
struct _ps_strings _ps;
int mib[2];
size_t len;
mib[0] = CTL_VM;
mib[1] = VM_PSSTRINGS;
len = sizeof(_ps);
if (sysctl(mib, 2, &_ps, &len, NULL, 0) != 0)
return;
ps = (struct ps_strings *)_ps.val;
}
ps->ps_nargvstr = 1;
ps->ps_argvstr = &bufp;
}