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 <stdarg.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <unistd.h> 42 #ifdef HAVE_SYS_PSTAT_H 43 #include <sys/pstat.h> 44 #endif 45 #include <string.h> 46 47 #include <vis.h> 48 49 #define SPT_NONE 0 /* don't use it at all */ 50 #define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */ 51 #define SPT_REUSEARGV 2 /* cover argv with title information */ 52 53 #ifndef SPT_TYPE 54 # define SPT_TYPE SPT_NONE 55 #endif 56 57 #ifndef SPT_PADCHAR 58 # define SPT_PADCHAR '\0' 59 #endif 60 61 #if SPT_TYPE == SPT_REUSEARGV 62 static char *argv_start = NULL; 63 static size_t argv_env_len = 0; 64 #endif 65 66 #endif /* HAVE_SETPROCTITLE */ 67 68 void 69 compat_init_setproctitle(int argc, char *argv[]) 70 { 71 #if !defined(HAVE_SETPROCTITLE) && \ 72 defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV 73 extern char **environ; 74 char *lastargv = NULL; 75 char **envp = environ; 76 int i; 77 78 /* 79 * NB: This assumes that argv has already been copied out of the 80 * way. This is true for sshd, but may not be true for other 81 * programs. Beware. 82 */ 83 84 if (argc == 0 || argv[0] == NULL) 85 return; 86 87 /* Fail if we can't allocate room for the new environment */ 88 for (i = 0; envp[i] != NULL; i++) 89 ; 90 if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) { 91 environ = envp; /* put it back */ 92 return; 93 } 94 95 /* 96 * Find the last argv string or environment variable within 97 * our process memory area. 98 */ 99 for (i = 0; i < argc; i++) { 100 if (lastargv == NULL || lastargv + 1 == argv[i]) 101 lastargv = argv[i] + strlen(argv[i]); 102 } 103 for (i = 0; envp[i] != NULL; i++) { 104 if (lastargv + 1 == envp[i]) 105 lastargv = envp[i] + strlen(envp[i]); 106 } 107 108 argv[1] = NULL; 109 argv_start = argv[0]; 110 argv_env_len = lastargv - argv[0] - 1; 111 112 /* 113 * Copy environment 114 * XXX - will truncate env on strdup fail 115 */ 116 for (i = 0; envp[i] != NULL; i++) 117 environ[i] = strdup(envp[i]); 118 environ[i] = NULL; 119 #endif /* SPT_REUSEARGV */ 120 } 121 122 #ifndef HAVE_SETPROCTITLE 123 void 124 setproctitle(const char *fmt, ...) 125 { 126 #if SPT_TYPE != SPT_NONE 127 va_list ap; 128 char buf[1024], ptitle[1024]; 129 size_t len = 0; 130 int r; 131 extern char *__progname; 132 #if SPT_TYPE == SPT_PSTAT 133 union pstun pst; 134 #endif 135 136 #if SPT_TYPE == SPT_REUSEARGV 137 if (argv_env_len <= 0) 138 return; 139 #endif 140 141 strlcpy(buf, __progname, sizeof(buf)); 142 143 r = -1; 144 va_start(ap, fmt); 145 if (fmt != NULL) { 146 len = strlcat(buf, ": ", sizeof(buf)); 147 if (len < sizeof(buf)) 148 r = vsnprintf(buf + len, sizeof(buf) - len , fmt, ap); 149 } 150 va_end(ap); 151 if (r == -1 || (size_t)r >= sizeof(buf) - len) 152 return; 153 strnvis(ptitle, buf, sizeof(ptitle), 154 VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL); 155 156 #if SPT_TYPE == SPT_PSTAT 157 pst.pst_command = ptitle; 158 pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0); 159 #elif SPT_TYPE == SPT_REUSEARGV 160 /* debug("setproctitle: copy \"%s\" into len %d", 161 buf, argv_env_len); */ 162 len = strlcpy(argv_start, ptitle, argv_env_len); 163 for(; len < argv_env_len; len++) 164 argv_start[len] = SPT_PADCHAR; 165 #endif 166 167 #endif /* SPT_NONE */ 168 } 169 170 #endif /* HAVE_SETPROCTITLE */ 171