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 1.5 2004/06/09 07:53:55 cpressey 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 FILE *fscript; 58 int master, slave; 59 int child; 60 char *fname; 61 int qflg, ttyflg; 62 63 struct termios tt; 64 65 static void done(int) __dead2; 66 static void dooutput(void); 67 static void doshell(char **); 68 static void fail(void); 69 static void finish(void); 70 static void usage(void); 71 72 int 73 main(int argc, char **argv) 74 { 75 int cc; 76 struct termios rtt, stt; 77 struct winsize win; 78 int aflg, kflg, ch, n; 79 struct timeval tv, *tvp; 80 time_t tvec, start; 81 char obuf[BUFSIZ]; 82 char ibuf[BUFSIZ]; 83 fd_set rfd; 84 int flushtime = 30; 85 int lastc = 1000; 86 87 aflg = kflg = 0; 88 while ((ch = getopt(argc, argv, "aqkt:")) != -1) 89 switch(ch) { 90 case 'a': 91 aflg = 1; 92 break; 93 case 'q': 94 qflg = 1; 95 break; 96 case 'k': 97 kflg = 1; 98 break; 99 case 't': 100 flushtime = atoi(optarg); 101 if (flushtime < 0) 102 err(1, "invalid flush time %d", flushtime); 103 break; 104 case '?': 105 default: 106 usage(); 107 } 108 argc -= optind; 109 argv += optind; 110 111 if (argc > 0) { 112 fname = argv[0]; 113 argv++; 114 argc--; 115 } else 116 fname = "typescript"; 117 118 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 119 err(1, "%s", fname); 120 121 if (ttyflg = isatty(STDIN_FILENO)) { 122 if (tcgetattr(STDIN_FILENO, &tt) == -1) 123 err(1, "tcgetattr"); 124 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 125 err(1, "ioctl"); 126 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 127 err(1, "openpty"); 128 } else { 129 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 130 err(1, "openpty"); 131 } 132 133 if (!qflg) { 134 tvec = time(NULL); 135 printf("Script started, output file is %s\n", fname); 136 fprintf(fscript, "Script started on %s", ctime(&tvec)); 137 fflush(fscript); 138 } 139 140 if (ttyflg) { 141 rtt = tt; 142 cfmakeraw(&rtt); 143 rtt.c_lflag &= ~ECHO; 144 tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 145 } 146 147 child = fork(); 148 if (child < 0) { 149 warn("fork"); 150 done(1); 151 } 152 if (child == 0) 153 doshell(argv); 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 void 212 finish(void) 213 { 214 int die, e, pid; 215 union wait status; 216 217 die = e = 0; 218 while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0) 219 if (pid == child) { 220 die = 1; 221 if (WIFEXITED(status)) 222 e = WEXITSTATUS(status); 223 else if (WIFSIGNALED(status)) 224 e = WTERMSIG(status); 225 else /* can't happen */ 226 e = 1; 227 } 228 229 if (die) 230 done(e); 231 } 232 233 void 234 doshell(char **av) 235 { 236 char *shell; 237 238 shell = getenv("SHELL"); 239 if (shell == NULL) 240 shell = _PATH_BSHELL; 241 242 close(master); 243 fclose(fscript); 244 login_tty(slave); 245 if (av[0]) { 246 execvp(av[0], av); 247 warn("%s", av[0]); 248 } else { 249 execl(shell, shell, "-i", NULL); 250 warn("%s", shell); 251 } 252 fail(); 253 } 254 255 void 256 fail(void) 257 { 258 kill(0, SIGTERM); 259 done(1); 260 } 261 262 void 263 done(int eno) 264 { 265 time_t tvec; 266 267 if (ttyflg) 268 tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 269 tvec = time(NULL); 270 if (!qflg) { 271 fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 272 printf("\nScript done, output file is %s\n", fname); 273 } 274 fclose(fscript); 275 close(master); 276 exit(eno); 277 } 278