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(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV 71 extern char **environ; 72 char *lastargv = NULL; 73 char **envp = environ; 74 int i; 75 76 /* 77 * NB: This assumes that argv has already been copied out of the 78 * way. This is true for sshd, but may not be true for other 79 * programs. Beware. 80 */ 81 82 if (argc == 0 || argv[0] == NULL) 83 return; 84 85 /* Fail if we can't allocate room for the new environment */ 86 for (i = 0; envp[i] != NULL; i++) 87 ; 88 if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) { 89 environ = envp; /* put it back */ 90 return; 91 } 92 93 /* 94 * Find the last argv string or environment variable within 95 * our process memory area. 96 */ 97 for (i = 0; i < argc; i++) { 98 if (lastargv == NULL || lastargv + 1 == argv[i]) 99 lastargv = argv[i] + strlen(argv[i]); 100 } 101 for (i = 0; envp[i] != NULL; i++) { 102 if (lastargv + 1 == envp[i]) 103 lastargv = envp[i] + strlen(envp[i]); 104 } 105 106 argv[1] = NULL; 107 argv_start = argv[0]; 108 argv_env_len = lastargv - argv[0] - 1; 109 110 /* 111 * Copy environment 112 * XXX - will truncate env on strdup fail 113 */ 114 for (i = 0; envp[i] != NULL; i++) 115 environ[i] = strdup(envp[i]); 116 environ[i] = NULL; 117 #endif /* SPT_REUSEARGV */ 118 } 119 120 #ifndef HAVE_SETPROCTITLE 121 void 122 setproctitle(const char *fmt, ...) 123 { 124 #if SPT_TYPE != SPT_NONE 125 va_list ap; 126 char buf[1024], ptitle[1024]; 127 size_t len; 128 extern char *__progname; 129 #if SPT_TYPE == SPT_PSTAT 130 union pstun pst; 131 #endif 132 133 #if SPT_TYPE == SPT_REUSEARGV 134 if (argv_env_len <= 0) 135 return; 136 #endif 137 138 strlcpy(buf, __progname, sizeof(buf)); 139 140 va_start(ap, fmt); 141 if (fmt != NULL) { 142 len = strlcat(buf, ": ", sizeof(buf)); 143 if (len < sizeof(buf)) 144 vsnprintf(buf + len, sizeof(buf) - len , fmt, ap); 145 } 146 va_end(ap); 147 strnvis(ptitle, buf, sizeof(ptitle), 148 VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL); 149 150 #if SPT_TYPE == SPT_PSTAT 151 pst.pst_command = ptitle; 152 pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0); 153 #elif SPT_TYPE == SPT_REUSEARGV 154 /* debug("setproctitle: copy \"%s\" into len %d", 155 buf, argv_env_len); */ 156 len = strlcpy(argv_start, ptitle, argv_env_len); 157 for(; len < argv_env_len; len++) 158 argv_start[len] = SPT_PADCHAR; 159 #endif 160 161 #endif /* SPT_NONE */ 162 } 163 164 #endif /* HAVE_SETPROCTITLE */ 165
