1/* Based on setproctitle.c from openssh-5.6p1 */ 2/* Based on conf.c from UCB sendmail 8.8.8 */ 3 4/* 5 * Copyright 2003 Damien Miller 6 * Copyright (c) 1983, 1995-1997 Eric P. Allman 7 * Copyright (c) 1988, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include "ruby.h" 36#include "ruby/util.h" 37#define compat_init_setproctitle ruby_init_setproctitle 38 39#ifndef HAVE_SETPROCTITLE 40 41#include <stdarg.h> 42#include <stdlib.h> 43#ifdef HAVE_UNISTD_H 44#include <unistd.h> 45#endif 46#ifdef HAVE_SYS_PSTAT_H 47#include <sys/pstat.h> 48#endif 49#include <string.h> 50 51#if defined(__APPLE__) 52# ifdef HAVE_CRT_EXTERNS_H 53# include <crt_externs.h> 54# undef environ 55# define environ (*_NSGetEnviron()) 56# else 57# include "crt_externs.h" 58# endif 59#endif 60 61#define SPT_NONE 0 /* don't use it at all */ 62#define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */ 63#define SPT_REUSEARGV 2 /* cover argv with title information */ 64 65#ifndef SPT_TYPE 66# define SPT_TYPE SPT_NONE 67#endif 68 69#ifndef SPT_PADCHAR 70# define SPT_PADCHAR '\0' 71#endif 72 73#if SPT_TYPE == SPT_REUSEARGV 74static char *argv_start = NULL; 75static size_t argv_env_len = 0; 76static size_t argv_len = 0; 77#endif 78 79#endif /* HAVE_SETPROCTITLE */ 80 81void 82compat_init_setproctitle(int argc, char *argv[]) 83{ 84#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV 85 extern char **environ; 86 char *lastargv = NULL; 87 char *lastenvp = NULL; 88 char **envp = environ; 89 int i; 90 91 /* 92 * NB: This assumes that argv has already been copied out of the 93 * way. This is true for sshd, but may not be true for other 94 * programs. Beware. 95 */ 96 97 if (argc == 0 || argv[0] == NULL) 98 return; 99 100 /* Fail if we can't allocate room for the new environment */ 101 for (i = 0; envp[i] != NULL; i++) 102 ; 103 if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) { 104 environ = envp; /* put it back */ 105 return; 106 } 107 108 /* 109 * Find the last argv string or environment variable within 110 * our process memory area. 111 */ 112 for (i = 0; i < argc; i++) { 113 if (lastargv == NULL || lastargv + 1 == argv[i]) 114 lastargv = argv[i] + strlen(argv[i]); 115 } 116 lastenvp = lastargv; 117 for (i = 0; envp[i] != NULL; i++) { 118 if (lastenvp + 1 == envp[i]) 119 lastenvp = envp[i] + strlen(envp[i]); 120 } 121 122 argv[1] = NULL; 123 argv_start = argv[0]; 124 argv_len = lastargv - argv[0]; 125 argv_env_len = lastenvp - argv[0]; 126 127 for (i = 0; envp[i] != NULL; i++) 128 environ[i] = ruby_strdup(envp[i]); 129 environ[i] = NULL; 130#endif /* SPT_REUSEARGV */ 131} 132 133#ifndef HAVE_SETPROCTITLE 134void 135setproctitle(const char *fmt, ...) 136{ 137#if SPT_TYPE != SPT_NONE 138 va_list ap; 139 char ptitle[1024]; 140 size_t len; 141 size_t argvlen; 142#if SPT_TYPE == SPT_PSTAT 143 union pstun pst; 144#endif 145 146#if SPT_TYPE == SPT_REUSEARGV 147 if (argv_env_len <= 0) 148 return; 149#endif 150 151 va_start(ap, fmt); 152 if (fmt != NULL) { 153 vsnprintf(ptitle, sizeof(ptitle) , fmt, ap); 154 } 155 va_end(ap); 156 157#if SPT_TYPE == SPT_PSTAT 158 pst.pst_command = ptitle; 159 pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0); 160#elif SPT_TYPE == SPT_REUSEARGV 161 len = strlcpy(argv_start, ptitle, argv_env_len); 162 argvlen = len > argv_len ? argv_env_len : argv_len; 163 for(; len < argvlen; len++) 164 argv_start[len] = SPT_PADCHAR; 165#endif 166 167#endif /* SPT_NONE */ 168} 169 170#endif /* HAVE_SETPROCTITLE */ 171