1 /* $NetBSD: setproctitle.c,v 1.10 1997/10/20 22:05:34 thorpej 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 1.10 1997/10/20 22:05:34 thorpej 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 63 /* 64 * For compatibility with old versions of crt0 that didn't define __ps_strings, 65 * define it as a common here. 66 */ 67 struct ps_strings *__ps_strings; 68 69 void 70 #if __STDC__ 71 setproctitle(const char *fmt, ...) 72 #else 73 setproctitle(fmt, va_alist) 74 const char *fmt; 75 va_dcl 76 #endif 77 { 78 va_list ap; 79 static char buf[MAX_PROCTITLE], *bufp = buf; 80 int used; 81 82 #if __STDC__ 83 va_start(ap, fmt); 84 #else 85 va_start(ap); 86 #endif 87 if (fmt != NULL) { 88 used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname); 89 (void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap); 90 } else 91 (void)snprintf(buf, MAX_PROCTITLE, "%s", __progname); 92 va_end(ap); 93 94 /* 95 * For compatibility with old versions of crt0 and old kernels, set 96 * __ps_strings to a default value if it's null. 97 */ 98 if (__ps_strings == 0) 99 __ps_strings = PS_STRINGS; 100 101 __ps_strings->ps_nargvstr = 1; 102 __ps_strings->ps_argvstr = &bufp; 103 } 104