setproctitle.c revision 126274
1183873Sraj/* Based on conf.c from UCB sendmail 8.8.8 */ 2183873Sraj 3183873Sraj/* 4183873Sraj * Copyright 2003 Damien Miller 5183873Sraj * Copyright (c) 1983, 1995-1997 Eric P. Allman 6183873Sraj * Copyright (c) 1988, 1993 7183873Sraj * The Regents of the University of California. All rights reserved. 8183873Sraj * 9183873Sraj * Redistribution and use in source and binary forms, with or without 10191954Skuriyama * modification, are permitted provided that the following conditions 11185478Ssam * are met: 12183873Sraj * 1. Redistributions of source code must retain the above copyright 13183873Sraj * notice, this list of conditions and the following disclaimer. 14183873Sraj * 2. Redistributions in binary form must reproduce the above copyright 15183873Sraj * notice, this list of conditions and the following disclaimer in the 16183873Sraj * documentation and/or other materials provided with the distribution. 17183873Sraj * 3. Neither the name of the University nor the names of its contributors 18183873Sraj * may be used to endorse or promote products derived from this software 19183873Sraj * without specific prior written permission. 20183873Sraj * 21191954Skuriyama * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22183873Sraj * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23191954Skuriyama * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24191954Skuriyama * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25191954Skuriyama * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26191954Skuriyama * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27183873Sraj * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28191954Skuriyama * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29183873Sraj * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30183873Sraj * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31183873Sraj * SUCH DAMAGE. 32183873Sraj */ 33183873Sraj 34183873Sraj#include "includes.h" 35191954Skuriyama 36183873Sraj#ifndef HAVE_SETPROCTITLE 37183873Sraj 38183873Sraj#include <unistd.h> 39183873Sraj#ifdef HAVE_SYS_PSTAT_H 40191954Skuriyama#include <sys/pstat.h> 41191954Skuriyama#endif 42203758Sattilio 43191954Skuriyama#define SPT_NONE 0 /* don't use it at all */ 44183873Sraj#define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */ 45183873Sraj#define SPT_REUSEARGV 2 /* cover argv with title information */ 46191954Skuriyama 47183873Sraj#ifndef SPT_TYPE 48183873Sraj# define SPT_TYPE SPT_NONE 49191954Skuriyama#endif 50183873Sraj 51185090Sraj#ifndef SPT_PADCHAR 52185090Sraj# define SPT_PADCHAR '\0' 53183873Sraj#endif 54183873Sraj 55183873Sraj#if SPT_TYPE == SPT_REUSEARGV 56183873Srajstatic char *argv_start = NULL; 57183873Srajstatic size_t argv_env_len = 0; 58183873Sraj#endif 59183873Sraj 60183873Sraj#endif /* HAVE_SETPROCTITLE */ 61183873Sraj 62183873Srajvoid 63183873Srajcompat_init_setproctitle(int argc, char *argv[]) 64183873Sraj{ 65183873Sraj#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV 66183873Sraj extern char **environ; 67183873Sraj char *lastargv = NULL; 68183873Sraj char **envp = environ; 69183873Sraj int i; 70183873Sraj 71183873Sraj /* 72183873Sraj * NB: This assumes that argv has already been copied out of the 73183873Sraj * way. This is true for sshd, but may not be true for other 74183873Sraj * programs. Beware. 75183873Sraj */ 76183873Sraj 77183873Sraj if (argc == 0 || argv[0] == NULL) 78183873Sraj return; 79183873Sraj 80183873Sraj /* Fail if we can't allocate room for the new environment */ 81194845Sraj for (i = 0; envp[i] != NULL; i++) 82194845Sraj ; 83194845Sraj if ((environ = malloc(sizeof(*environ) * (i + 1))) == NULL) { 84194845Sraj environ = envp; /* put it back */ 85 return; 86 } 87 88 /* 89 * Find the last argv string or environment variable within 90 * our process memory area. 91 */ 92 for (i = 0; i < argc; i++) { 93 if (lastargv == NULL || lastargv + 1 == argv[i]) 94 lastargv = argv[i] + strlen(argv[i]); 95 } 96 for (i = 0; envp[i] != NULL; i++) { 97 if (lastargv + 1 == envp[i]) 98 lastargv = envp[i] + strlen(envp[i]); 99 } 100 101 argv[1] = NULL; 102 argv_start = argv[0]; 103 argv_env_len = lastargv - argv[0] - 1; 104 105 /* 106 * Copy environment 107 * XXX - will truncate env on strdup fail 108 */ 109 for (i = 0; envp[i] != NULL; i++) 110 environ[i] = strdup(envp[i]); 111 environ[i] = NULL; 112#endif /* SPT_REUSEARGV */ 113} 114 115#ifndef HAVE_SETPROCTITLE 116void 117setproctitle(const char *fmt, ...) 118{ 119#if SPT_TYPE != SPT_NONE 120 va_list ap; 121 char buf[1024]; 122 size_t len; 123 extern char *__progname; 124#if SPT_TYPE == SPT_PSTAT 125 union pstun pst; 126#endif 127 128#if SPT_TYPE == SPT_REUSEARGV 129 if (argv_env_len <= 0) 130 return; 131#endif 132 133 strlcpy(buf, __progname, sizeof(buf)); 134 135 va_start(ap, fmt); 136 if (fmt != NULL) { 137 len = strlcat(buf, ": ", sizeof(buf)); 138 if (len < sizeof(buf)) 139 vsnprintf(buf + len, sizeof(buf) - len , fmt, ap); 140 } 141 va_end(ap); 142 143#if SPT_TYPE == SPT_PSTAT 144 pst.pst_command = buf; 145 pstat(PSTAT_SETCMD, pst, strlen(buf), 0, 0); 146#elif SPT_TYPE == SPT_REUSEARGV 147/* debug("setproctitle: copy \"%s\" into len %d", 148 buf, argv_env_len); */ 149 len = strlcpy(argv_start, buf, argv_env_len); 150 for(; len < argv_env_len; len++) 151 argv_start[len] = SPT_PADCHAR; 152#endif 153 154#endif /* SPT_NONE */ 155} 156 157#endif /* HAVE_SETPROCTITLE */ 158