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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1992, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif 39 40 #ifndef lint 41 static const char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93"; 42 #endif 43 44 #include <sys/types.h> 45 #include <sys/wait.h> 46 #include <sys/stat.h> 47 #include <sys/ioctl.h> 48 #include <sys/time.h> 49 #include <sys/uio.h> 50 #include <sys/endian.h> 51 #include <sys/param.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <libutil.h> 57 #include <paths.h> 58 #include <signal.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <termios.h> 63 #include <unistd.h> 64 65 #define DEF_BUF 65536 66 67 struct stamp { 68 uint64_t scr_len; /* amount of data */ 69 uint64_t scr_sec; /* time it arrived in seconds... */ 70 uint32_t scr_usec; /* ...and microseconds */ 71 uint32_t scr_direction; /* 'i', 'o', etc (also indicates endianness) */ 72 }; 73 74 static FILE *fscript; 75 static int master, slave; 76 static int child; 77 static const char *fname; 78 static int qflg, ttyflg; 79 static int usesleep, rawout; 80 81 static struct termios tt; 82 83 static void done(int) __dead2; 84 static void doshell(char **); 85 static void fail(void); 86 static void finish(void); 87 static void record(FILE *, char *, size_t, int); 88 static void consume(FILE *, off_t, char *, int); 89 static void playback(FILE *) __dead2; 90 static void usage(void); 91 92 int 93 main(int argc, char *argv[]) 94 { 95 int cc; 96 struct termios rtt, stt; 97 struct winsize win; 98 int aflg, kflg, pflg, ch, n; 99 struct timeval tv, *tvp; 100 time_t tvec, start; 101 char obuf[BUFSIZ]; 102 char ibuf[BUFSIZ]; 103 fd_set rfd; 104 int flushtime = 30; 105 int readstdin; 106 int k; 107 108 aflg = kflg = pflg = 0; 109 usesleep = 1; 110 rawout = 0; 111 112 while ((ch = getopt(argc, argv, "adkpqrt:")) != -1) 113 switch(ch) { 114 case 'a': 115 aflg = 1; 116 break; 117 case 'd': 118 usesleep = 0; 119 break; 120 case 'k': 121 kflg = 1; 122 break; 123 case 'p': 124 pflg = 1; 125 break; 126 case 'q': 127 qflg = 1; 128 break; 129 case 'r': 130 rawout = 1; 131 break; 132 case 't': 133 flushtime = atoi(optarg); 134 if (flushtime < 0) 135 err(1, "invalid flush time %d", flushtime); 136 break; 137 case '?': 138 default: 139 usage(); 140 } 141 argc -= optind; 142 argv += optind; 143 144 if (argc > 0) { 145 fname = argv[0]; 146 argv++; 147 argc--; 148 } else 149 fname = "typescript"; 150 151 if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL) 152 err(1, "%s", fname); 153 154 if (pflg) 155 playback(fscript); 156 157 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 158 if (tcgetattr(STDIN_FILENO, &tt) == -1) 159 err(1, "tcgetattr"); 160 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 161 err(1, "ioctl"); 162 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 163 err(1, "openpty"); 164 } else { 165 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 166 err(1, "openpty"); 167 } 168 169 if (rawout) 170 record(fscript, NULL, 0, 's'); 171 172 if (!qflg) { 173 tvec = time(NULL); 174 (void)printf("Script started, output file is %s\n", fname); 175 if (!rawout) { 176 (void)fprintf(fscript, "Script started on %s", 177 ctime(&tvec)); 178 if (argv[0]) { 179 fprintf(fscript, "command: "); 180 for (k = 0 ; argv[k] ; ++k) 181 fprintf(fscript, "%s%s", k ? " " : "", 182 argv[k]); 183 fprintf(fscript, "\n"); 184 } 185 } 186 fflush(fscript); 187 } 188 if (ttyflg) { 189 rtt = tt; 190 cfmakeraw(&rtt); 191 rtt.c_lflag &= ~ECHO; 192 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 193 } 194 195 child = fork(); 196 if (child < 0) { 197 warn("fork"); 198 done(1); 199 } 200 if (child == 0) 201 doshell(argv); 202 close(slave); 203 204 start = tvec = time(0); 205 readstdin = 1; 206 for (;;) { 207 FD_ZERO(&rfd); 208 FD_SET(master, &rfd); 209 if (readstdin) 210 FD_SET(STDIN_FILENO, &rfd); 211 if ((!readstdin && ttyflg) || flushtime > 0) { 212 tv.tv_sec = !readstdin && ttyflg ? 1 : 213 flushtime - (tvec - start); 214 tv.tv_usec = 0; 215 tvp = &tv; 216 readstdin = 1; 217 } else { 218 tvp = NULL; 219 } 220 n = select(master + 1, &rfd, 0, 0, tvp); 221 if (n < 0 && errno != EINTR) 222 break; 223 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 224 cc = read(STDIN_FILENO, ibuf, BUFSIZ); 225 if (cc < 0) 226 break; 227 if (cc == 0) { 228 if (tcgetattr(master, &stt) == 0 && 229 (stt.c_lflag & ICANON) != 0) { 230 (void)write(master, &stt.c_cc[VEOF], 1); 231 } 232 readstdin = 0; 233 } 234 if (cc > 0) { 235 if (rawout) 236 record(fscript, ibuf, cc, 'i'); 237 (void)write(master, ibuf, cc); 238 if (kflg && tcgetattr(master, &stt) >= 0 && 239 ((stt.c_lflag & ECHO) == 0)) { 240 (void)fwrite(ibuf, 1, cc, fscript); 241 } 242 } 243 } 244 if (n > 0 && FD_ISSET(master, &rfd)) { 245 cc = read(master, obuf, sizeof (obuf)); 246 if (cc <= 0) 247 break; 248 (void)write(STDOUT_FILENO, obuf, cc); 249 if (rawout) 250 record(fscript, obuf, cc, 'o'); 251 else 252 (void)fwrite(obuf, 1, cc, fscript); 253 } 254 tvec = time(0); 255 if (tvec - start >= flushtime) { 256 fflush(fscript); 257 start = tvec; 258 } 259 } 260 finish(); 261 done(0); 262 } 263 264 static void 265 usage(void) 266 { 267 (void)fprintf(stderr, 268 "usage: script [-adkpqr] [-t time] [file [command ...]]\n"); 269 exit(1); 270 } 271 272 static void 273 finish(void) 274 { 275 int e, status; 276 277 if (waitpid(child, &status, 0) == child) { 278 if (WIFEXITED(status)) 279 e = WEXITSTATUS(status); 280 else if (WIFSIGNALED(status)) 281 e = WTERMSIG(status); 282 else /* can't happen */ 283 e = 1; 284 done(e); 285 } 286 } 287 288 static void 289 doshell(char **av) 290 { 291 const char *shell; 292 293 shell = getenv("SHELL"); 294 if (shell == NULL) 295 shell = _PATH_BSHELL; 296 297 (void)close(master); 298 (void)fclose(fscript); 299 login_tty(slave); 300 setenv("SCRIPT", fname, 1); 301 if (av[0]) { 302 execvp(av[0], av); 303 warn("%s", av[0]); 304 } else { 305 execl(shell, shell, "-i", (char *)NULL); 306 warn("%s", shell); 307 } 308 fail(); 309 } 310 311 static void 312 fail(void) 313 { 314 (void)kill(0, SIGTERM); 315 done(1); 316 } 317 318 static void 319 done(int eno) 320 { 321 time_t tvec; 322 323 if (ttyflg) 324 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 325 tvec = time(NULL); 326 if (rawout) 327 record(fscript, NULL, 0, 'e'); 328 if (!qflg) { 329 if (!rawout) 330 (void)fprintf(fscript,"\nScript done on %s", 331 ctime(&tvec)); 332 (void)printf("\nScript done, output file is %s\n", fname); 333 } 334 (void)fclose(fscript); 335 (void)close(master); 336 exit(eno); 337 } 338 339 static void 340 record(FILE *fp, char *buf, size_t cc, int direction) 341 { 342 struct iovec iov[2]; 343 struct stamp stamp; 344 struct timeval tv; 345 346 (void)gettimeofday(&tv, NULL); 347 stamp.scr_len = cc; 348 stamp.scr_sec = tv.tv_sec; 349 stamp.scr_usec = tv.tv_usec; 350 stamp.scr_direction = direction; 351 iov[0].iov_len = sizeof(stamp); 352 iov[0].iov_base = &stamp; 353 iov[1].iov_len = cc; 354 iov[1].iov_base = buf; 355 if (writev(fileno(fp), &iov[0], 2) == -1) 356 err(1, "writev"); 357 } 358 359 static void 360 consume(FILE *fp, off_t len, char *buf, int reg) 361 { 362 size_t l; 363 364 if (reg) { 365 if (fseeko(fp, len, SEEK_CUR) == -1) 366 err(1, NULL); 367 } 368 else { 369 while (len > 0) { 370 l = MIN(DEF_BUF, len); 371 if (fread(buf, sizeof(char), l, fp) != l) 372 err(1, "cannot read buffer"); 373 len -= l; 374 } 375 } 376 } 377 378 #define swapstamp(stamp) do { \ 379 if (stamp.scr_direction > 0xff) { \ 380 stamp.scr_len = bswap64(stamp.scr_len); \ 381 stamp.scr_sec = bswap64(stamp.scr_sec); \ 382 stamp.scr_usec = bswap32(stamp.scr_usec); \ 383 stamp.scr_direction = bswap32(stamp.scr_direction); \ 384 } \ 385 } while (0/*CONSTCOND*/) 386 387 static void 388 playback(FILE *fp) 389 { 390 struct timespec tsi, tso; 391 struct stamp stamp; 392 struct stat pst; 393 char buf[DEF_BUF]; 394 off_t nread, save_len; 395 size_t l; 396 time_t tclock; 397 int reg; 398 399 if (fstat(fileno(fp), &pst) == -1) 400 err(1, "fstat failed"); 401 402 reg = S_ISREG(pst.st_mode); 403 404 for (nread = 0; !reg || nread < pst.st_size; nread += save_len) { 405 if (fread(&stamp, sizeof(stamp), 1, fp) != 1) { 406 if (reg) 407 err(1, "reading playback header"); 408 else 409 break; 410 } 411 swapstamp(stamp); 412 save_len = sizeof(stamp); 413 414 if (reg && stamp.scr_len > 415 (uint64_t)(pst.st_size - save_len) - nread) 416 errx(1, "invalid stamp"); 417 418 save_len += stamp.scr_len; 419 tclock = stamp.scr_sec; 420 tso.tv_sec = stamp.scr_sec; 421 tso.tv_nsec = stamp.scr_usec * 1000; 422 423 switch (stamp.scr_direction) { 424 case 's': 425 if (!qflg) 426 (void)printf("Script started on %s", 427 ctime(&tclock)); 428 tsi = tso; 429 (void)consume(fp, stamp.scr_len, buf, reg); 430 break; 431 case 'e': 432 if (!qflg) 433 (void)printf("\nScript done on %s", 434 ctime(&tclock)); 435 (void)consume(fp, stamp.scr_len, buf, reg); 436 break; 437 case 'i': 438 /* throw input away */ 439 (void)consume(fp, stamp.scr_len, buf, reg); 440 break; 441 case 'o': 442 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 443 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 444 if (tsi.tv_nsec < 0) { 445 tsi.tv_sec -= 1; 446 tsi.tv_nsec += 1000000000; 447 } 448 if (usesleep) 449 (void)nanosleep(&tsi, NULL); 450 tsi = tso; 451 while (stamp.scr_len > 0) { 452 l = MIN(DEF_BUF, stamp.scr_len); 453 if (fread(buf, sizeof(char), l, fp) != l) 454 err(1, "cannot read buffer"); 455 456 (void)write(STDOUT_FILENO, buf, l); 457 stamp.scr_len -= l; 458 } 459 break; 460 default: 461 errx(1, "invalid direction"); 462 } 463 } 464 (void)fclose(fp); 465 exit(0); 466 } 467