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setproctitle.c revision 1.9 
      1 /*	$NetBSD: setproctitle.c,v 1.9 1997/10/16 23:05:33 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994, 1995 Christopher G. Demetriou
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Christopher G. Demetriou
     18  *	for the NetBSD Project.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 #if defined(LIBC_SCCS) && !defined(lint)
     36 __RCSID("$NetBSD: setproctitle.c,v 1.9 1997/10/16 23:05:33 christos Exp $");
     37 #endif /* LIBC_SCCS and not lint */
     38 
     39 #include "namespace.h"
     40 #include <sys/param.h>
     41 #include <sys/types.h>
     42 #include <sys/exec.h>
     43 #include <vm/vm.h>
     44 
     45 #include <stdio.h>
     46 #include <stdlib.h>
     47 #include <string.h>
     48 
     49 #ifdef __STDC__
     50 #include <stdarg.h>
     51 #else
     52 #include <varargs.h>
     53 #endif
     54 
     55 #ifdef __weak_alias
     56 __weak_alias(setproctitle,_setproctitle);
     57 #endif
     58 
     59 #define	MAX_PROCTITLE	2048
     60 
     61 extern char *__progname;		/* Program name, from crt0. */
     62 extern struct ps_strings *__ps_strings;	/* Ps strings, from crt0 */
     63 
     64 void
     65 #if __STDC__
     66 setproctitle(const char *fmt, ...)
     67 #else
     68 setproctitle(fmt, va_alist)
     69 	const char *fmt;
     70 	va_dcl
     71 #endif
     72 {
     73 	va_list ap;
     74 	static char buf[MAX_PROCTITLE], *bufp = buf;
     75 	int used;
     76 
     77 #if __STDC__
     78 	va_start(ap, fmt);
     79 #else
     80 	va_start(ap);
     81 #endif
     82 	if (fmt != NULL) {
     83 		used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname);
     84 		(void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap);
     85 	} else
     86 		(void)snprintf(buf, MAX_PROCTITLE, "%s", __progname);
     87 	va_end(ap);
     88 
     89 	__ps_strings->ps_nargvstr = 1;
     90 	__ps_strings->ps_argvstr = &bufp;
     91 }
     92