1 /* 2 * Copyright (c) 1994, 1995 Christopher G. Demetriou 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Christopher G. Demetriou 16 * for the NetBSD Project. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #if defined(LIBC_SCCS) && !defined(lint) 33 static char rcsid[] = "$OpenBSD: setproctitle.c,v 1.8 2001/11/06 19:21:40 art Exp $"; 34 #endif /* LIBC_SCCS and not lint */ 35 36 #include <sys/param.h> 37 #include <sys/types.h> 38 #include <sys/exec.h> 39 #include <sys/sysctl.h> 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #ifdef __STDC__ 46 #include <stdarg.h> 47 #else 48 #include <varargs.h> 49 #endif 50 51 #define MAX_PROCTITLE 2048 52 53 extern char *__progname; /* Program name, from crt0. */ 54 55 void 56 #ifdef __STDC__ 57 setproctitle(const char *fmt, ...) 58 #else 59 setproctitle(fmt, va_alist) 60 const char *fmt; 61 va_dcl 62 #endif 63 { 64 static struct ps_strings *ps; 65 va_list ap; 66 67 static char buf[MAX_PROCTITLE], *bufp = buf; 68 size_t used; 69 70 #ifdef __STDC__ 71 va_start(ap, fmt); 72 #else 73 va_start(ap); 74 #endif 75 if (fmt != NULL) { 76 used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname); 77 if (used >= MAX_PROCTITLE) 78 used = MAX_PROCTITLE - 1; 79 (void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap); 80 } else 81 (void)snprintf(buf, MAX_PROCTITLE, "%s", __progname); 82 va_end(ap); 83 84 if (ps == NULL) { 85 struct _ps_strings _ps; 86 int mib[2]; 87 size_t len; 88 89 mib[0] = CTL_VM; 90 mib[1] = VM_PSSTRINGS; 91 len = sizeof(_ps); 92 if (sysctl(mib, 2, &_ps, &len, NULL, 0) != 0) 93 return; 94 ps = (struct ps_strings *)_ps.val; 95 } 96 ps->ps_nargvstr = 1; 97 ps->ps_argvstr = &bufp; 98 } 99