1 /* Based on conf.c from UCB sendmail 8.8.8 */ 2 3 /* 4 * Copyright 2003 Damien Miller 5 * Copyright (c) 1983, 1995-1997 Eric P. Allman 6 * Copyright (c) 1988, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "includes.h" 35 36 #ifndef HAVE_SETPROCTITLE 37 38 #include <unistd.h> 39 #ifdef HAVE_SYS_PSTAT_H 40 #include <sys/pstat.h> 41 #endif 42 43 #define SPT_NONE 0 /* don't use it at all */ 44 #define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */ 45 #define SPT_REUSEARGV 2 /* cover argv with title information */ 46 47 #ifndef SPT_TYPE 48 # define SPT_TYPE SPT_NONE 49 #endif 50 51 #ifndef SPT_PADCHAR 52 # define SPT_PADCHAR '\0' 53 #endif 54 55 #if SPT_TYPE == SPT_REUSEARGV 56 static char *argv_start = NULL; 57 static size_t argv_env_len = 0; 58 #endif 59 60 #endif /* HAVE_SETPROCTITLE */ 61 62 void 63 compat_init_setproctitle(int argc, char *argv[]) 64 { 65 #if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV 66 extern char **environ; 67 char *lastargv = NULL; 68 char **envp = environ; 69 int i; 70 71 /* 72 * NB: This assumes that argv has already been copied out of the 73 * way. This is true for sshd, but may not be true for other 74 * programs. Beware. 75 */ 76 77 if (argc == 0 || argv[0] == NULL) 78 return; 79 80 /* Fail if we can't allocate room for the new environment */ 81 for (i = 0; envp[i] != NULL; i++) 82 ; 83 if ((environ = malloc(sizeof(*environ) * (i + 1))) == NULL) { 84 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 116 void 117 setproctitle(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