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 1.9 2002/02/19 19:39:36 millert 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 #include <stdarg.h> 45 46 #define MAX_PROCTITLE 2048 47 48 extern char *__progname; /* Program name, from crt0. */ 49 50 void 51 setproctitle(const char *fmt, ...) 52 { 53 static struct ps_strings *ps; 54 va_list ap; 55 56 static char buf[MAX_PROCTITLE], *bufp = buf; 57 size_t used; 58 59 va_start(ap, fmt); 60 if (fmt != NULL) { 61 used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname); 62 if (used >= MAX_PROCTITLE) 63 used = MAX_PROCTITLE - 1; 64 (void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap); 65 } else 66 (void)snprintf(buf, MAX_PROCTITLE, "%s", __progname); 67 va_end(ap); 68 69 if (ps == NULL) { 70 struct _ps_strings _ps; 71 int mib[2]; 72 size_t len; 73 74 mib[0] = CTL_VM; 75 mib[1] = VM_PSSTRINGS; 76 len = sizeof(_ps); 77 if (sysctl(mib, 2, &_ps, &len, NULL, 0) != 0) 78 return; 79 ps = (struct ps_strings *)_ps.val; 80 } 81 ps->ps_nargvstr = 1; 82 ps->ps_argvstr = &bufp; 83 } 84