1 /* 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)script.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/usr.bin/script/script.c,v 1.11.2.2 2004/03/13 09:21:00 cperciva Exp $ 36 * $DragonFly: src/usr.bin/script/script.c,v 1.9 2005/03/07 21:30:57 liamfoy Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/wait.h> 41 #include <sys/stat.h> 42 #include <sys/ioctl.h> 43 #include <sys/time.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <libutil.h> 49 #include <paths.h> 50 #include <signal.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <termios.h> 55 #include <unistd.h> 56 57 static FILE *fscript; 58 static int master, slave; 59 static pid_t child; 60 static const char *fname; 61 static int qflg, ttyflg; 62 63 struct termios tt; 64 65 static void done(int) __dead2; 66 static void doshell(char **); 67 static void fail(void); 68 static void finish(void); 69 static void usage(void); 70 71 int 72 main(int argc, char **argv) 73 { 74 int cc; 75 struct termios rtt, stt; 76 struct winsize win; 77 int aflg, kflg, ch, n; 78 struct timeval tv, *tvp; 79 time_t tvec, start; 80 char obuf[BUFSIZ]; 81 char ibuf[BUFSIZ]; 82 fd_set rfd; 83 int flushtime = 30; 84 85 aflg = kflg = 0; 86 while ((ch = getopt(argc, argv, "aqkt:")) != -1) { 87 switch(ch) { 88 case 'a': 89 aflg = 1; 90 break; 91 case 'q': 92 qflg = 1; 93 break; 94 case 'k': 95 kflg = 1; 96 break; 97 case 't': 98 flushtime = atoi(optarg); 99 if (flushtime < 0) 100 errx(1, "invalid flush time %d", flushtime); 101 break; 102 case '?': 103 default: 104 usage(); 105 } 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc > 0) { 111 fname = argv[0]; 112 argv++; 113 argc--; 114 } else 115 fname = "typescript"; 116 117 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 118 err(1, "%s", fname); 119 120 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 121 if (tcgetattr(STDIN_FILENO, &tt) == -1) 122 err(1, "tcgetattr"); 123 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 124 err(1, "ioctl"); 125 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 126 err(1, "openpty"); 127 } else { 128 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 129 err(1, "openpty"); 130 } 131 132 if (!qflg) { 133 tvec = time(NULL); 134 printf("Script started, output file is %s\n", fname); 135 fprintf(fscript, "Script started on %s", ctime(&tvec)); 136 fflush(fscript); 137 } 138 139 if (ttyflg) { 140 rtt = tt; 141 cfmakeraw(&rtt); 142 rtt.c_lflag &= ~ECHO; 143 tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 144 } 145 146 child = fork(); 147 if (child < 0) { 148 warn("fork"); 149 done(1); 150 } 151 if (child == 0) 152 doshell(argv); 153 close(slave); 154 155 if (flushtime > 0) 156 tvp = &tv; 157 else 158 tvp = NULL; 159 160 start = time(0); 161 FD_ZERO(&rfd); 162 for (;;) { 163 FD_SET(master, &rfd); 164 FD_SET(STDIN_FILENO, &rfd); 165 if (flushtime > 0) { 166 tv.tv_sec = flushtime; 167 tv.tv_usec = 0; 168 } 169 n = select(master + 1, &rfd, 0, 0, tvp); 170 if (n < 0 && errno != EINTR) 171 break; 172 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 173 cc = read(STDIN_FILENO, ibuf, sizeof(ibuf)); 174 if (cc < 0) 175 break; 176 if (cc == 0) 177 write(master, ibuf, 0); 178 if (cc > 0) { 179 write(master, ibuf, cc); 180 if (kflg && tcgetattr(master, &stt) >= 0 && 181 ((stt.c_lflag & ECHO) == 0)) { 182 fwrite(ibuf, 1, cc, fscript); 183 } 184 } 185 } 186 if (n > 0 && FD_ISSET(master, &rfd)) { 187 cc = read(master, obuf, sizeof(obuf)); 188 if (cc <= 0) 189 break; 190 write(STDOUT_FILENO, obuf, cc); 191 fwrite(obuf, 1, cc, fscript); 192 } 193 tvec = time(0); 194 if (tvec - start >= flushtime) { 195 fflush(fscript); 196 start = tvec; 197 } 198 } 199 finish(); 200 done(0); 201 } 202 203 static void 204 usage(void) 205 { 206 fprintf(stderr, 207 "usage: script [-a] [-q] [-k] [-t time] [file] [command]\n"); 208 exit(1); 209 } 210 211 static void 212 finish(void) 213 { 214 int die, e; 215 pid_t pid; 216 union wait status; 217 218 die = e = 0; 219 while ((pid = wait3((int *)&status, WNOHANG, NULL)) > 0) { 220 if (pid == child) { 221 die = 1; 222 if (WIFEXITED(status)) 223 e = WEXITSTATUS(status); 224 else if (WIFSIGNALED(status)) 225 e = WTERMSIG(status); 226 else /* can't happen */ 227 e = 1; 228 } 229 } 230 231 if (die) 232 done(e); 233 } 234 235 static void 236 doshell(char **av) 237 { 238 const char *shell; 239 240 shell = getenv("SHELL"); 241 if (shell == NULL) 242 shell = _PATH_BSHELL; 243 244 close(master); 245 fclose(fscript); 246 login_tty(slave); 247 if (av[0] != NULL) { 248 execvp(av[0], av); 249 warn("%s", av[0]); 250 } else { 251 execl(shell, shell, "-i", NULL); 252 warn("%s", shell); 253 } 254 fail(); 255 } 256 257 static void 258 fail(void) 259 { 260 kill(0, SIGTERM); 261 done(1); 262 } 263 264 static void 265 done(int eno) 266 { 267 time_t tvec; 268 269 if (ttyflg) 270 tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 271 tvec = time(NULL); 272 if (!qflg) { 273 fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 274 printf("\nScript done, output file is '%s'\n", fname); 275 } 276 fclose(fscript); 277 close(master); 278 exit(eno); 279 } 280