1 /* $NetBSD: setproctitle.c,v 1.20 2002/05/26 14:03:20 wiz 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 for the 18 * NetBSD Project. See http://www.netbsd.org/ for 19 * information about NetBSD. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>> 35 */ 36 37 #include <sys/cdefs.h> 38 #if defined(LIBC_SCCS) && !defined(lint) 39 __RCSID("$NetBSD: setproctitle.c,v 1.20 2002/05/26 14:03:20 wiz Exp $"); 40 #endif /* LIBC_SCCS and not lint */ 41 42 #include "namespace.h" 43 #include <sys/param.h> 44 #include <sys/types.h> 45 #include <sys/exec.h> 46 #include <stdarg.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #ifdef __weak_alias 52 __weak_alias(setproctitle,_setproctitle) 53 #endif 54 55 #define MAX_PROCTITLE 2048 56 57 /* 58 * For compatibility with old versions of crt0 that didn't define __ps_strings, 59 * define it as a common here. 60 */ 61 struct ps_strings *__ps_strings; 62 63 void 64 setproctitle(const char *fmt, ...) 65 { 66 va_list ap; 67 static char buf[MAX_PROCTITLE], *bufp; 68 int used; 69 70 va_start(ap, fmt); 71 if (fmt != NULL) { 72 used = snprintf(buf, (size_t)MAX_PROCTITLE, "%s: ", 73 getprogname()); 74 (void)vsnprintf(buf + used, (size_t)(MAX_PROCTITLE - used), 75 fmt, ap); 76 } else 77 (void)snprintf(buf, MAX_PROCTITLE, "%s", getprogname()); 78 va_end(ap); 79 80 bufp = buf; 81 82 #ifdef USRSTACK 83 /* 84 * For compatibility with old versions of crt0 and old kernels, set 85 * __ps_strings to a default value if it's null. 86 * But only if USRSTACK is defined. It might not be defined if 87 * user-level code can not assume it's a constant (i.e. m68k). 88 */ 89 if (__ps_strings == 0) 90 __ps_strings = PS_STRINGS; 91 #endif /* USRSTACK */ 92 93 if (__ps_strings != 0) { 94 __ps_strings->ps_nargvstr = 1; 95 __ps_strings->ps_argvstr = &bufp; 96 } 97 } 98