id.c revision 36450
1/*- 2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: id.c,v 1.8 1998/05/21 21:45:32 brian Exp $ 27 */ 28 29#include <sys/types.h> 30#include <sys/socket.h> 31#include <sys/un.h> 32 33#include <sys/ioctl.h> 34#include <fcntl.h> 35#include <stdarg.h> 36#include <stdio.h> 37#include <string.h> 38#include <sysexits.h> 39#include <unistd.h> 40#ifdef __OpenBSD__ 41#include <util.h> 42#else 43#include <libutil.h> 44#endif 45#include <utmp.h> 46 47#include "log.h" 48#include "main.h" 49#include "id.h" 50 51static int uid; 52static int euid; 53 54void 55ID0init() 56{ 57 uid = getuid(); 58 euid = geteuid(); 59} 60 61static void 62ID0setuser(void) 63{ 64 if (seteuid(uid) == -1) { 65 log_Printf(LogERROR, "ID0setuser: Unable to seteuid!\n"); 66 AbortProgram(EX_NOPERM); 67 } 68} 69 70uid_t 71ID0realuid() 72{ 73 return uid; 74} 75 76static void 77ID0set0(void) 78{ 79 if (seteuid(euid) == -1) { 80 log_Printf(LogERROR, "ID0set0: Unable to seteuid!\n"); 81 AbortProgram(EX_NOPERM); 82 } 83} 84 85int 86ID0ioctl(int fd, unsigned long req, void *arg) 87{ 88 int ret; 89 90 ID0set0(); 91 ret = ioctl(fd, req, arg); 92 log_Printf(LogID0, "%d = ioctl(%d, %lu, %p)\n", ret, fd, req, arg); 93 ID0setuser(); 94 return ret; 95} 96 97int 98ID0unlink(const char *name) 99{ 100 int ret; 101 102 ID0set0(); 103 ret = unlink(name); 104 log_Printf(LogID0, "%d = unlink(\"%s\")\n", ret, name); 105 ID0setuser(); 106 return ret; 107} 108 109int 110ID0socket(int domain, int type, int protocol) 111{ 112 int ret; 113 114 ID0set0(); 115 ret = socket(domain, type, protocol); 116 log_Printf(LogID0, "%d = socket(%d, %d, %d)\n", ret, domain, type, protocol); 117 ID0setuser(); 118 return ret; 119} 120 121FILE * 122ID0fopen(const char *path, const char *mode) 123{ 124 FILE *ret; 125 126 ID0set0(); 127 ret = fopen(path, mode); 128 log_Printf(LogID0, "%p = fopen(\"%s\", \"%s\")\n", ret, path, mode); 129 ID0setuser(); 130 return ret; 131} 132 133int 134ID0open(const char *path, int flags, ...) 135{ 136 int ret; 137 va_list ap; 138 139 va_start(ap, flags); 140 ID0set0(); 141 ret = open(path, flags, va_arg(ap, int)); 142 log_Printf(LogID0, "%d = open(\"%s\", %d)\n", ret, path, flags); 143 ID0setuser(); 144 va_end(ap); 145 return ret; 146} 147 148int 149ID0write(int fd, const void *data, size_t len) 150{ 151 int ret; 152 153 ID0set0(); 154 ret = write(fd, data, len); 155 log_Printf(LogID0, "%d = write(%d, data, %d)\n", ret, fd, len); 156 ID0setuser(); 157 return ret; 158} 159 160int 161ID0uu_lock(const char *basettyname) 162{ 163 int ret; 164 165 ID0set0(); 166 ret = uu_lock(basettyname); 167 log_Printf(LogID0, "%d = uu_lock(\"%s\")\n", ret, basettyname); 168 ID0setuser(); 169 return ret; 170} 171 172int 173ID0uu_lock_txfr(const char *basettyname, pid_t newpid) 174{ 175 int ret; 176 177 ID0set0(); 178 ret = uu_lock_txfr(basettyname, newpid); 179 log_Printf(LogID0, "%d = uu_lock_txfr(\"%s\", %d)\n", ret, basettyname, 180 (int)newpid); 181 ID0setuser(); 182 return ret; 183} 184 185int 186ID0uu_unlock(const char *basettyname) 187{ 188 int ret; 189 190 ID0set0(); 191 ret = uu_unlock(basettyname); 192 log_Printf(LogID0, "%d = uu_unlock(\"%s\")\n", ret, basettyname); 193 ID0setuser(); 194 return ret; 195} 196 197void 198ID0login(struct utmp *ut) 199{ 200 ID0set0(); 201 if (logout(ut->ut_line)) { 202 log_Printf(LogID0, "logout(\"%s\")\n", ut->ut_line); 203 logwtmp(ut->ut_line, "", ""); 204 log_Printf(LogID0, "logwtmp(\"%s\", \"\", \"\")\n", ut->ut_line); 205 } 206 login(ut); 207 log_Printf(LogID0, "login(\"%s\", \"%.*s\")\n", 208 ut->ut_line, (int)(sizeof ut->ut_name), ut->ut_name); 209 ID0setuser(); 210} 211 212void 213ID0logout(const char *device) 214{ 215 struct utmp ut; 216 217 strncpy(ut.ut_line, device, sizeof ut.ut_line - 1); 218 ut.ut_line[sizeof ut.ut_line - 1] = '\0'; 219 220 ID0set0(); 221 if (logout(ut.ut_line)) { 222 log_Printf(LogID0, "logout(\"%s\")\n", ut.ut_line); 223 logwtmp(ut.ut_line, "", ""); 224 log_Printf(LogID0, "logwtmp(\"%s\", \"\", \"\")\n", ut.ut_line); 225 } else 226 log_Printf(LogERROR, "ID0logout: No longer logged in on %s\n", ut.ut_line); 227 ID0setuser(); 228} 229 230int 231ID0bind_un(int s, const struct sockaddr_un *name) 232{ 233 int result; 234 235 ID0set0(); 236 result = bind(s, (const struct sockaddr *)name, sizeof *name); 237 log_Printf(LogID0, "%d = bind(%d, \"%s\", %d)\n", 238 result, s, name->sun_path, sizeof *name); 239 ID0setuser(); 240 return result; 241} 242 243int 244ID0connect_un(int s, const struct sockaddr_un *name) 245{ 246 int result; 247 248 ID0set0(); 249 result = connect(s, (const struct sockaddr *)name, sizeof *name); 250 log_Printf(LogID0, "%d = connect(%d, \"%s\", %d)\n", 251 result, s, name->sun_path, sizeof *name); 252 ID0setuser(); 253 return result; 254} 255