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