1 /* 2 * Copyright (c) 2010, 2012 David E. O'Brien 3 * Copyright (c) 1980, 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/param.h> 32 __FBSDID("$FreeBSD$"); 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1980, 1992, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif 38 #ifndef lint 39 static const char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 42 #include <sys/wait.h> 43 #include <sys/stat.h> 44 #include <sys/ioctl.h> 45 #include <sys/time.h> 46 #include <sys/uio.h> 47 #include <sys/endian.h> 48 #include <dev/filemon/filemon.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <fcntl.h> 53 #include <libutil.h> 54 #include <paths.h> 55 #include <signal.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <termios.h> 60 #include <unistd.h> 61 62 #define DEF_BUF 65536 63 64 struct stamp { 65 uint64_t scr_len; /* amount of data */ 66 uint64_t scr_sec; /* time it arrived in seconds... */ 67 uint32_t scr_usec; /* ...and microseconds */ 68 uint32_t scr_direction; /* 'i', 'o', etc (also indicates endianness) */ 69 }; 70 71 static FILE *fscript; 72 static int master, slave; 73 static int child; 74 static const char *fname; 75 static char *fmfname; 76 static int fflg, qflg, ttyflg; 77 static int usesleep, rawout; 78 79 static struct termios tt; 80 81 static void done(int) __dead2; 82 static void doshell(char **); 83 static void fail(void); 84 static void finish(void); 85 static void record(FILE *, char *, size_t, int); 86 static void consume(FILE *, off_t, char *, int); 87 static void playback(FILE *) __dead2; 88 static void usage(void); 89 90 int 91 main(int argc, char *argv[]) 92 { 93 int cc; 94 struct termios rtt, stt; 95 struct winsize win; 96 struct timeval tv, *tvp; 97 time_t tvec, start; 98 char obuf[BUFSIZ]; 99 char ibuf[BUFSIZ]; 100 fd_set rfd; 101 int aflg, Fflg, kflg, pflg, ch, k, n; 102 int flushtime, readstdin; 103 int fm_fd, fm_log; 104 105 aflg = Fflg = kflg = pflg = 0; 106 usesleep = 1; 107 rawout = 0; 108 flushtime = 30; 109 fm_fd = -1; /* Shut up stupid "may be used uninitialized" GCC 110 warning. (not needed w/clang) */ 111 112 while ((ch = getopt(argc, argv, "adFfkpqrt:")) != -1) 113 switch(ch) { 114 case 'a': 115 aflg = 1; 116 break; 117 case 'd': 118 usesleep = 0; 119 break; 120 case 'F': 121 Fflg = 1; 122 break; 123 case 'f': 124 fflg = 1; 125 break; 126 case 'k': 127 kflg = 1; 128 break; 129 case 'p': 130 pflg = 1; 131 break; 132 case 'q': 133 qflg = 1; 134 break; 135 case 'r': 136 rawout = 1; 137 break; 138 case 't': 139 flushtime = atoi(optarg); 140 if (flushtime < 0) 141 err(1, "invalid flush time %d", flushtime); 142 break; 143 case '?': 144 default: 145 usage(); 146 } 147 argc -= optind; 148 argv += optind; 149 150 if (argc > 0) { 151 fname = argv[0]; 152 argv++; 153 argc--; 154 } else 155 fname = "typescript"; 156 157 if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL) 158 err(1, "%s", fname); 159 160 if (fflg) { 161 asprintf(&fmfname, "%s.filemon", fname); 162 if (!fmfname) 163 err(1, "%s.filemon", fname); 164 if ((fm_fd = open("/dev/filemon", O_RDWR)) == -1) 165 err(1, "open(\"/dev/filemon\", O_RDWR)"); 166 if ((fm_log = open(fmfname, O_WRONLY | O_CREAT | O_TRUNC, 167 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1) 168 err(1, "open(%s)", fmfname); 169 if (ioctl(fm_fd, FILEMON_SET_FD, &fm_log) < 0) 170 err(1, "Cannot set filemon log file descriptor"); 171 172 /* Set up these two fd's to close on exec. */ 173 (void)fcntl(fm_fd, F_SETFD, FD_CLOEXEC); 174 (void)fcntl(fm_log, F_SETFD, FD_CLOEXEC); 175 } 176 177 if (pflg) 178 playback(fscript); 179 180 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 181 if (tcgetattr(STDIN_FILENO, &tt) == -1) 182 err(1, "tcgetattr"); 183 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 184 err(1, "ioctl"); 185 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 186 err(1, "openpty"); 187 } else { 188 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 189 err(1, "openpty"); 190 } 191 192 if (rawout) 193 record(fscript, NULL, 0, 's'); 194 195 if (!qflg) { 196 tvec = time(NULL); 197 (void)printf("Script started, output file is %s\n", fname); 198 if (!rawout) { 199 (void)fprintf(fscript, "Script started on %s", 200 ctime(&tvec)); 201 if (argv[0]) { 202 fprintf(fscript, "command: "); 203 for (k = 0 ; argv[k] ; ++k) 204 fprintf(fscript, "%s%s", k ? " " : "", 205 argv[k]); 206 fprintf(fscript, "\n"); 207 } 208 } 209 fflush(fscript); 210 if (fflg) { 211 (void)printf("Filemon started, output file is %s\n", 212 fmfname); 213 } 214 } 215 if (ttyflg) { 216 rtt = tt; 217 cfmakeraw(&rtt); 218 rtt.c_lflag &= ~ECHO; 219 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 220 } 221 222 child = fork(); 223 if (child < 0) { 224 warn("fork"); 225 done(1); 226 } 227 if (child == 0) 228 doshell(argv); 229 close(slave); 230 231 if (fflg && ioctl(fm_fd, FILEMON_SET_PID, &child) < 0) 232 err(1, "Cannot set filemon PID"); 233 234 start = tvec = time(0); 235 readstdin = 1; 236 for (;;) { 237 FD_ZERO(&rfd); 238 FD_SET(master, &rfd); 239 if (readstdin) 240 FD_SET(STDIN_FILENO, &rfd); 241 if ((!readstdin && ttyflg) || flushtime > 0) { 242 tv.tv_sec = !readstdin && ttyflg ? 1 : 243 flushtime - (tvec - start); 244 tv.tv_usec = 0; 245 tvp = &tv; 246 readstdin = 1; 247 } else { 248 tvp = NULL; 249 } 250 n = select(master + 1, &rfd, 0, 0, tvp); 251 if (n < 0 && errno != EINTR) 252 break; 253 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 254 cc = read(STDIN_FILENO, ibuf, BUFSIZ); 255 if (cc < 0) 256 break; 257 if (cc == 0) { 258 if (tcgetattr(master, &stt) == 0 && 259 (stt.c_lflag & ICANON) != 0) { 260 (void)write(master, &stt.c_cc[VEOF], 1); 261 } 262 readstdin = 0; 263 } 264 if (cc > 0) { 265 if (rawout) 266 record(fscript, ibuf, cc, 'i'); 267 (void)write(master, ibuf, cc); 268 if (kflg && tcgetattr(master, &stt) >= 0 && 269 ((stt.c_lflag & ECHO) == 0)) { 270 (void)fwrite(ibuf, 1, cc, fscript); 271 } 272 } 273 } 274 if (n > 0 && FD_ISSET(master, &rfd)) { 275 cc = read(master, obuf, sizeof (obuf)); 276 if (cc <= 0) 277 break; 278 (void)write(STDOUT_FILENO, obuf, cc); 279 if (rawout) 280 record(fscript, obuf, cc, 'o'); 281 else 282 (void)fwrite(obuf, 1, cc, fscript); 283 } 284 tvec = time(0); 285 if (tvec - start >= flushtime) { 286 fflush(fscript); 287 start = tvec; 288 } 289 if (Fflg) 290 fflush(fscript); 291 } 292 finish(); 293 done(0); 294 } 295 296 static void 297 usage(void) 298 { 299 (void)fprintf(stderr, 300 "usage: script [-adfkpqr] [-t time] [file [command ...]]\n"); 301 exit(1); 302 } 303 304 static void 305 finish(void) 306 { 307 int e, status; 308 309 if (waitpid(child, &status, 0) == child) { 310 if (WIFEXITED(status)) 311 e = WEXITSTATUS(status); 312 else if (WIFSIGNALED(status)) 313 e = WTERMSIG(status); 314 else /* can't happen */ 315 e = 1; 316 done(e); 317 } 318 } 319 320 static void 321 doshell(char **av) 322 { 323 const char *shell; 324 325 shell = getenv("SHELL"); 326 if (shell == NULL) 327 shell = _PATH_BSHELL; 328 329 (void)close(master); 330 (void)fclose(fscript); 331 free(fmfname); 332 login_tty(slave); 333 setenv("SCRIPT", fname, 1); 334 if (av[0]) { 335 execvp(av[0], av); 336 warn("%s", av[0]); 337 } else { 338 execl(shell, shell, "-i", (char *)NULL); 339 warn("%s", shell); 340 } 341 fail(); 342 } 343 344 static void 345 fail(void) 346 { 347 (void)kill(0, SIGTERM); 348 done(1); 349 } 350 351 static void 352 done(int eno) 353 { 354 time_t tvec; 355 356 if (ttyflg) 357 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 358 tvec = time(NULL); 359 if (rawout) 360 record(fscript, NULL, 0, 'e'); 361 if (!qflg) { 362 if (!rawout) 363 (void)fprintf(fscript,"\nScript done on %s", 364 ctime(&tvec)); 365 (void)printf("\nScript done, output file is %s\n", fname); 366 if (fflg) { 367 (void)printf("Filemon done, output file is %s\n", 368 fmfname); 369 } 370 } 371 (void)fclose(fscript); 372 (void)close(master); 373 exit(eno); 374 } 375 376 static void 377 record(FILE *fp, char *buf, size_t cc, int direction) 378 { 379 struct iovec iov[2]; 380 struct stamp stamp; 381 struct timeval tv; 382 383 (void)gettimeofday(&tv, NULL); 384 stamp.scr_len = cc; 385 stamp.scr_sec = tv.tv_sec; 386 stamp.scr_usec = tv.tv_usec; 387 stamp.scr_direction = direction; 388 iov[0].iov_len = sizeof(stamp); 389 iov[0].iov_base = &stamp; 390 iov[1].iov_len = cc; 391 iov[1].iov_base = buf; 392 if (writev(fileno(fp), &iov[0], 2) == -1) 393 err(1, "writev"); 394 } 395 396 static void 397 consume(FILE *fp, off_t len, char *buf, int reg) 398 { 399 size_t l; 400 401 if (reg) { 402 if (fseeko(fp, len, SEEK_CUR) == -1) 403 err(1, NULL); 404 } 405 else { 406 while (len > 0) { 407 l = MIN(DEF_BUF, len); 408 if (fread(buf, sizeof(char), l, fp) != l) 409 err(1, "cannot read buffer"); 410 len -= l; 411 } 412 } 413 } 414 415 #define swapstamp(stamp) do { \ 416 if (stamp.scr_direction > 0xff) { \ 417 stamp.scr_len = bswap64(stamp.scr_len); \ 418 stamp.scr_sec = bswap64(stamp.scr_sec); \ 419 stamp.scr_usec = bswap32(stamp.scr_usec); \ 420 stamp.scr_direction = bswap32(stamp.scr_direction); \ 421 } \ 422 } while (0/*CONSTCOND*/) 423 424 static void 425 playback(FILE *fp) 426 { 427 struct timespec tsi, tso; 428 struct stamp stamp; 429 struct stat pst; 430 char buf[DEF_BUF]; 431 off_t nread, save_len; 432 size_t l; 433 time_t tclock; 434 int reg; 435 436 if (fstat(fileno(fp), &pst) == -1) 437 err(1, "fstat failed"); 438 439 reg = S_ISREG(pst.st_mode); 440 441 for (nread = 0; !reg || nread < pst.st_size; nread += save_len) { 442 if (fread(&stamp, sizeof(stamp), 1, fp) != 1) { 443 if (reg) 444 err(1, "reading playback header"); 445 else 446 break; 447 } 448 swapstamp(stamp); 449 save_len = sizeof(stamp); 450 451 if (reg && stamp.scr_len > 452 (uint64_t)(pst.st_size - save_len) - nread) 453 errx(1, "invalid stamp"); 454 455 save_len += stamp.scr_len; 456 tclock = stamp.scr_sec; 457 tso.tv_sec = stamp.scr_sec; 458 tso.tv_nsec = stamp.scr_usec * 1000; 459 460 switch (stamp.scr_direction) { 461 case 's': 462 if (!qflg) 463 (void)printf("Script started on %s", 464 ctime(&tclock)); 465 tsi = tso; 466 (void)consume(fp, stamp.scr_len, buf, reg); 467 break; 468 case 'e': 469 if (!qflg) 470 (void)printf("\nScript done on %s", 471 ctime(&tclock)); 472 (void)consume(fp, stamp.scr_len, buf, reg); 473 break; 474 case 'i': 475 /* throw input away */ 476 (void)consume(fp, stamp.scr_len, buf, reg); 477 break; 478 case 'o': 479 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 480 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 481 if (tsi.tv_nsec < 0) { 482 tsi.tv_sec -= 1; 483 tsi.tv_nsec += 1000000000; 484 } 485 if (usesleep) 486 (void)nanosleep(&tsi, NULL); 487 tsi = tso; 488 while (stamp.scr_len > 0) { 489 l = MIN(DEF_BUF, stamp.scr_len); 490 if (fread(buf, sizeof(char), l, fp) != l) 491 err(1, "cannot read buffer"); 492 493 (void)write(STDOUT_FILENO, buf, l); 494 stamp.scr_len -= l; 495 } 496 break; 497 default: 498 errx(1, "invalid direction"); 499 } 500 } 501 (void)fclose(fp); 502 exit(0); 503 } 504