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 if (fflg) { 229 int pid; 230 231 pid = getpid(); 232 if (ioctl(fm_fd, FILEMON_SET_PID, &pid) < 0) 233 err(1, "Cannot set filemon PID"); 234 } 235 236 doshell(argv); 237 } 238 close(slave); 239 240 start = tvec = time(0); 241 readstdin = 1; 242 for (;;) { 243 FD_ZERO(&rfd); 244 FD_SET(master, &rfd); 245 if (readstdin) 246 FD_SET(STDIN_FILENO, &rfd); 247 if (!readstdin && ttyflg) { 248 tv.tv_sec = 1; 249 tv.tv_usec = 0; 250 tvp = &tv; 251 readstdin = 1; 252 } else if (flushtime > 0) { 253 tv.tv_sec = flushtime - (tvec - start); 254 tv.tv_usec = 0; 255 tvp = &tv; 256 } else { 257 tvp = NULL; 258 } 259 n = select(master + 1, &rfd, 0, 0, tvp); 260 if (n < 0 && errno != EINTR) 261 break; 262 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 263 cc = read(STDIN_FILENO, ibuf, BUFSIZ); 264 if (cc < 0) 265 break; 266 if (cc == 0) { 267 if (tcgetattr(master, &stt) == 0 && 268 (stt.c_lflag & ICANON) != 0) { 269 (void)write(master, &stt.c_cc[VEOF], 1); 270 } 271 readstdin = 0; 272 } 273 if (cc > 0) { 274 if (rawout) 275 record(fscript, ibuf, cc, 'i'); 276 (void)write(master, ibuf, cc); 277 if (kflg && tcgetattr(master, &stt) >= 0 && 278 ((stt.c_lflag & ECHO) == 0)) { 279 (void)fwrite(ibuf, 1, cc, fscript); 280 } 281 } 282 } 283 if (n > 0 && FD_ISSET(master, &rfd)) { 284 cc = read(master, obuf, sizeof (obuf)); 285 if (cc <= 0) 286 break; 287 (void)write(STDOUT_FILENO, obuf, cc); 288 if (rawout) 289 record(fscript, obuf, cc, 'o'); 290 else 291 (void)fwrite(obuf, 1, cc, fscript); 292 } 293 tvec = time(0); 294 if (tvec - start >= flushtime) { 295 fflush(fscript); 296 start = tvec; 297 } 298 if (Fflg) 299 fflush(fscript); 300 } 301 finish(); 302 done(0); 303 } 304 305 static void 306 usage(void) 307 { 308 (void)fprintf(stderr, 309 "usage: script [-adfkpqr] [-t time] [file [command ...]]\n"); 310 exit(1); 311 } 312 313 static void 314 finish(void) 315 { 316 int e, status; 317 318 if (waitpid(child, &status, 0) == child) { 319 if (WIFEXITED(status)) 320 e = WEXITSTATUS(status); 321 else if (WIFSIGNALED(status)) 322 e = WTERMSIG(status); 323 else /* can't happen */ 324 e = 1; 325 done(e); 326 } 327 } 328 329 static void 330 doshell(char **av) 331 { 332 const char *shell; 333 334 shell = getenv("SHELL"); 335 if (shell == NULL) 336 shell = _PATH_BSHELL; 337 338 (void)close(master); 339 (void)fclose(fscript); 340 free(fmfname); 341 login_tty(slave); 342 setenv("SCRIPT", fname, 1); 343 if (av[0]) { 344 execvp(av[0], av); 345 warn("%s", av[0]); 346 } else { 347 execl(shell, shell, "-i", (char *)NULL); 348 warn("%s", shell); 349 } 350 fail(); 351 } 352 353 static void 354 fail(void) 355 { 356 (void)kill(0, SIGTERM); 357 done(1); 358 } 359 360 static void 361 done(int eno) 362 { 363 time_t tvec; 364 365 if (ttyflg) 366 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 367 tvec = time(NULL); 368 if (rawout) 369 record(fscript, NULL, 0, 'e'); 370 if (!qflg) { 371 if (!rawout) 372 (void)fprintf(fscript,"\nScript done on %s", 373 ctime(&tvec)); 374 (void)printf("\nScript done, output file is %s\n", fname); 375 if (fflg) { 376 (void)printf("Filemon done, output file is %s\n", 377 fmfname); 378 } 379 } 380 (void)fclose(fscript); 381 (void)close(master); 382 exit(eno); 383 } 384 385 static void 386 record(FILE *fp, char *buf, size_t cc, int direction) 387 { 388 struct iovec iov[2]; 389 struct stamp stamp; 390 struct timeval tv; 391 392 (void)gettimeofday(&tv, NULL); 393 stamp.scr_len = cc; 394 stamp.scr_sec = tv.tv_sec; 395 stamp.scr_usec = tv.tv_usec; 396 stamp.scr_direction = direction; 397 iov[0].iov_len = sizeof(stamp); 398 iov[0].iov_base = &stamp; 399 iov[1].iov_len = cc; 400 iov[1].iov_base = buf; 401 if (writev(fileno(fp), &iov[0], 2) == -1) 402 err(1, "writev"); 403 } 404 405 static void 406 consume(FILE *fp, off_t len, char *buf, int reg) 407 { 408 size_t l; 409 410 if (reg) { 411 if (fseeko(fp, len, SEEK_CUR) == -1) 412 err(1, NULL); 413 } 414 else { 415 while (len > 0) { 416 l = MIN(DEF_BUF, len); 417 if (fread(buf, sizeof(char), l, fp) != l) 418 err(1, "cannot read buffer"); 419 len -= l; 420 } 421 } 422 } 423 424 #define swapstamp(stamp) do { \ 425 if (stamp.scr_direction > 0xff) { \ 426 stamp.scr_len = bswap64(stamp.scr_len); \ 427 stamp.scr_sec = bswap64(stamp.scr_sec); \ 428 stamp.scr_usec = bswap32(stamp.scr_usec); \ 429 stamp.scr_direction = bswap32(stamp.scr_direction); \ 430 } \ 431 } while (0/*CONSTCOND*/) 432 433 static void 434 playback(FILE *fp) 435 { 436 struct timespec tsi, tso; 437 struct stamp stamp; 438 struct stat pst; 439 char buf[DEF_BUF]; 440 off_t nread, save_len; 441 size_t l; 442 time_t tclock; 443 int reg; 444 445 if (fstat(fileno(fp), &pst) == -1) 446 err(1, "fstat failed"); 447 448 reg = S_ISREG(pst.st_mode); 449 450 for (nread = 0; !reg || nread < pst.st_size; nread += save_len) { 451 if (fread(&stamp, sizeof(stamp), 1, fp) != 1) { 452 if (reg) 453 err(1, "reading playback header"); 454 else 455 break; 456 } 457 swapstamp(stamp); 458 save_len = sizeof(stamp); 459 460 if (reg && stamp.scr_len > 461 (uint64_t)(pst.st_size - save_len) - nread) 462 errx(1, "invalid stamp"); 463 464 save_len += stamp.scr_len; 465 tclock = stamp.scr_sec; 466 tso.tv_sec = stamp.scr_sec; 467 tso.tv_nsec = stamp.scr_usec * 1000; 468 469 switch (stamp.scr_direction) { 470 case 's': 471 if (!qflg) 472 (void)printf("Script started on %s", 473 ctime(&tclock)); 474 tsi = tso; 475 (void)consume(fp, stamp.scr_len, buf, reg); 476 break; 477 case 'e': 478 if (!qflg) 479 (void)printf("\nScript done on %s", 480 ctime(&tclock)); 481 (void)consume(fp, stamp.scr_len, buf, reg); 482 break; 483 case 'i': 484 /* throw input away */ 485 (void)consume(fp, stamp.scr_len, buf, reg); 486 break; 487 case 'o': 488 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 489 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 490 if (tsi.tv_nsec < 0) { 491 tsi.tv_sec -= 1; 492 tsi.tv_nsec += 1000000000; 493 } 494 if (usesleep) 495 (void)nanosleep(&tsi, NULL); 496 tsi = tso; 497 while (stamp.scr_len > 0) { 498 l = MIN(DEF_BUF, stamp.scr_len); 499 if (fread(buf, sizeof(char), l, fp) != l) 500 err(1, "cannot read buffer"); 501 502 (void)write(STDOUT_FILENO, buf, l); 503 stamp.scr_len -= l; 504 } 505 break; 506 default: 507 errx(1, "invalid direction"); 508 } 509 } 510 (void)fclose(fp); 511 exit(0); 512 } 513