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