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 finish(void); 84 static void record(FILE *, char *, size_t, int); 85 static void consume(FILE *, off_t, char *, int); 86 static void playback(FILE *) __dead2; 87 static void usage(void); 88 89 int 90 main(int argc, char *argv[]) 91 { 92 int cc; 93 struct termios rtt, stt; 94 struct winsize win; 95 struct timeval tv, *tvp; 96 time_t tvec, start; 97 char obuf[BUFSIZ]; 98 char ibuf[BUFSIZ]; 99 fd_set rfd; 100 int aflg, Fflg, kflg, pflg, ch, k, n; 101 int flushtime, readstdin; 102 int fm_fd, fm_log; 103 104 aflg = Fflg = kflg = pflg = 0; 105 usesleep = 1; 106 rawout = 0; 107 flushtime = 30; 108 fm_fd = -1; /* Shut up stupid "may be used uninitialized" GCC 109 warning. (not needed w/clang) */ 110 111 while ((ch = getopt(argc, argv, "adFfkpqrt:")) != -1) 112 switch(ch) { 113 case 'a': 114 aflg = 1; 115 break; 116 case 'd': 117 usesleep = 0; 118 break; 119 case 'F': 120 Fflg = 1; 121 break; 122 case 'f': 123 fflg = 1; 124 break; 125 case 'k': 126 kflg = 1; 127 break; 128 case 'p': 129 pflg = 1; 130 break; 131 case 'q': 132 qflg = 1; 133 break; 134 case 'r': 135 rawout = 1; 136 break; 137 case 't': 138 flushtime = atoi(optarg); 139 if (flushtime < 0) 140 err(1, "invalid flush time %d", flushtime); 141 break; 142 case '?': 143 default: 144 usage(); 145 } 146 argc -= optind; 147 argv += optind; 148 149 if (argc > 0) { 150 fname = argv[0]; 151 argv++; 152 argc--; 153 } else 154 fname = "typescript"; 155 156 if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL) 157 err(1, "%s", fname); 158 159 if (fflg) { 160 asprintf(&fmfname, "%s.filemon", fname); 161 if (!fmfname) 162 err(1, "%s.filemon", fname); 163 if ((fm_fd = open("/dev/filemon", O_RDWR)) == -1) 164 err(1, "open(\"/dev/filemon\", O_RDWR)"); 165 if ((fm_log = open(fmfname, O_WRONLY | O_CREAT | O_TRUNC, 166 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1) 167 err(1, "open(%s)", fmfname); 168 if (ioctl(fm_fd, FILEMON_SET_FD, &fm_log) < 0) 169 err(1, "Cannot set filemon log file descriptor"); 170 171 /* Set up these two fd's to close on exec. */ 172 (void)fcntl(fm_fd, F_SETFD, FD_CLOEXEC); 173 (void)fcntl(fm_log, F_SETFD, FD_CLOEXEC); 174 } 175 176 if (pflg) 177 playback(fscript); 178 179 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 180 if (tcgetattr(STDIN_FILENO, &tt) == -1) 181 err(1, "tcgetattr"); 182 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 183 err(1, "ioctl"); 184 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 185 err(1, "openpty"); 186 } else { 187 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 188 err(1, "openpty"); 189 } 190 191 if (rawout) 192 record(fscript, NULL, 0, 's'); 193 194 if (!qflg) { 195 tvec = time(NULL); 196 (void)printf("Script started, output file is %s\n", fname); 197 if (!rawout) { 198 (void)fprintf(fscript, "Script started on %s", 199 ctime(&tvec)); 200 if (argv[0]) { 201 fprintf(fscript, "command: "); 202 for (k = 0 ; argv[k] ; ++k) 203 fprintf(fscript, "%s%s", k ? " " : "", 204 argv[k]); 205 fprintf(fscript, "\n"); 206 } 207 } 208 fflush(fscript); 209 if (fflg) { 210 (void)printf("Filemon started, output file is %s\n", 211 fmfname); 212 } 213 } 214 if (ttyflg) { 215 rtt = tt; 216 cfmakeraw(&rtt); 217 rtt.c_lflag &= ~ECHO; 218 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 219 } 220 221 child = fork(); 222 if (child < 0) { 223 warn("fork"); 224 done(1); 225 } 226 if (child == 0) { 227 if (fflg) { 228 int pid; 229 230 pid = getpid(); 231 if (ioctl(fm_fd, FILEMON_SET_PID, &pid) < 0) 232 err(1, "Cannot set filemon PID"); 233 } 234 235 doshell(argv); 236 } 237 close(slave); 238 239 start = tvec = time(0); 240 readstdin = 1; 241 for (;;) { 242 FD_ZERO(&rfd); 243 FD_SET(master, &rfd); 244 if (readstdin) 245 FD_SET(STDIN_FILENO, &rfd); 246 if (!readstdin && ttyflg) { 247 tv.tv_sec = 1; 248 tv.tv_usec = 0; 249 tvp = &tv; 250 readstdin = 1; 251 } else if (flushtime > 0) { 252 tv.tv_sec = flushtime - (tvec - start); 253 tv.tv_usec = 0; 254 tvp = &tv; 255 } else { 256 tvp = NULL; 257 } 258 n = select(master + 1, &rfd, 0, 0, tvp); 259 if (n < 0 && errno != EINTR) 260 break; 261 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 262 cc = read(STDIN_FILENO, ibuf, BUFSIZ); 263 if (cc < 0) 264 break; 265 if (cc == 0) { 266 if (tcgetattr(master, &stt) == 0 && 267 (stt.c_lflag & ICANON) != 0) { 268 (void)write(master, &stt.c_cc[VEOF], 1); 269 } 270 readstdin = 0; 271 } 272 if (cc > 0) { 273 if (rawout) 274 record(fscript, ibuf, cc, 'i'); 275 (void)write(master, ibuf, cc); 276 if (kflg && tcgetattr(master, &stt) >= 0 && 277 ((stt.c_lflag & ECHO) == 0)) { 278 (void)fwrite(ibuf, 1, cc, fscript); 279 } 280 } 281 } 282 if (n > 0 && FD_ISSET(master, &rfd)) { 283 cc = read(master, obuf, sizeof (obuf)); 284 if (cc <= 0) 285 break; 286 (void)write(STDOUT_FILENO, obuf, cc); 287 if (rawout) 288 record(fscript, obuf, cc, 'o'); 289 else 290 (void)fwrite(obuf, 1, cc, fscript); 291 } 292 tvec = time(0); 293 if (tvec - start >= flushtime) { 294 fflush(fscript); 295 start = tvec; 296 } 297 if (Fflg) 298 fflush(fscript); 299 } 300 finish(); 301 done(0); 302 } 303 304 static void 305 usage(void) 306 { 307 (void)fprintf(stderr, 308 "usage: script [-adfkpqr] [-t time] [file [command ...]]\n"); 309 exit(1); 310 } 311 312 static void 313 finish(void) 314 { 315 int e, status; 316 317 if (waitpid(child, &status, 0) == child) { 318 if (WIFEXITED(status)) 319 e = WEXITSTATUS(status); 320 else if (WIFSIGNALED(status)) 321 e = WTERMSIG(status); 322 else /* can't happen */ 323 e = 1; 324 done(e); 325 } 326 } 327 328 static void 329 doshell(char **av) 330 { 331 const char *shell; 332 333 shell = getenv("SHELL"); 334 if (shell == NULL) 335 shell = _PATH_BSHELL; 336 337 (void)close(master); 338 (void)fclose(fscript); 339 free(fmfname); 340 login_tty(slave); 341 setenv("SCRIPT", fname, 1); 342 if (av[0]) { 343 execvp(av[0], av); 344 warn("%s", av[0]); 345 } else { 346 execl(shell, shell, "-i", (char *)NULL); 347 warn("%s", shell); 348 } 349 exit(1); 350 } 351 352 static void 353 done(int eno) 354 { 355 time_t tvec; 356 357 if (ttyflg) 358 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 359 tvec = time(NULL); 360 if (rawout) 361 record(fscript, NULL, 0, 'e'); 362 if (!qflg) { 363 if (!rawout) 364 (void)fprintf(fscript,"\nScript done on %s", 365 ctime(&tvec)); 366 (void)printf("\nScript done, output file is %s\n", fname); 367 if (fflg) { 368 (void)printf("Filemon done, output file is %s\n", 369 fmfname); 370 } 371 } 372 (void)fclose(fscript); 373 (void)close(master); 374 exit(eno); 375 } 376 377 static void 378 record(FILE *fp, char *buf, size_t cc, int direction) 379 { 380 struct iovec iov[2]; 381 struct stamp stamp; 382 struct timeval tv; 383 384 (void)gettimeofday(&tv, NULL); 385 stamp.scr_len = cc; 386 stamp.scr_sec = tv.tv_sec; 387 stamp.scr_usec = tv.tv_usec; 388 stamp.scr_direction = direction; 389 iov[0].iov_len = sizeof(stamp); 390 iov[0].iov_base = &stamp; 391 iov[1].iov_len = cc; 392 iov[1].iov_base = buf; 393 if (writev(fileno(fp), &iov[0], 2) == -1) 394 err(1, "writev"); 395 } 396 397 static void 398 consume(FILE *fp, off_t len, char *buf, int reg) 399 { 400 size_t l; 401 402 if (reg) { 403 if (fseeko(fp, len, SEEK_CUR) == -1) 404 err(1, NULL); 405 } 406 else { 407 while (len > 0) { 408 l = MIN(DEF_BUF, len); 409 if (fread(buf, sizeof(char), l, fp) != l) 410 err(1, "cannot read buffer"); 411 len -= l; 412 } 413 } 414 } 415 416 #define swapstamp(stamp) do { \ 417 if (stamp.scr_direction > 0xff) { \ 418 stamp.scr_len = bswap64(stamp.scr_len); \ 419 stamp.scr_sec = bswap64(stamp.scr_sec); \ 420 stamp.scr_usec = bswap32(stamp.scr_usec); \ 421 stamp.scr_direction = bswap32(stamp.scr_direction); \ 422 } \ 423 } while (0/*CONSTCOND*/) 424 425 static void 426 playback(FILE *fp) 427 { 428 struct timespec tsi, tso; 429 struct stamp stamp; 430 struct stat pst; 431 char buf[DEF_BUF]; 432 off_t nread, save_len; 433 size_t l; 434 time_t tclock; 435 int reg; 436 437 if (fstat(fileno(fp), &pst) == -1) 438 err(1, "fstat failed"); 439 440 reg = S_ISREG(pst.st_mode); 441 442 for (nread = 0; !reg || nread < pst.st_size; nread += save_len) { 443 if (fread(&stamp, sizeof(stamp), 1, fp) != 1) { 444 if (reg) 445 err(1, "reading playback header"); 446 else 447 break; 448 } 449 swapstamp(stamp); 450 save_len = sizeof(stamp); 451 452 if (reg && stamp.scr_len > 453 (uint64_t)(pst.st_size - save_len) - nread) 454 errx(1, "invalid stamp"); 455 456 save_len += stamp.scr_len; 457 tclock = stamp.scr_sec; 458 tso.tv_sec = stamp.scr_sec; 459 tso.tv_nsec = stamp.scr_usec * 1000; 460 461 switch (stamp.scr_direction) { 462 case 's': 463 if (!qflg) 464 (void)printf("Script started on %s", 465 ctime(&tclock)); 466 tsi = tso; 467 (void)consume(fp, stamp.scr_len, buf, reg); 468 break; 469 case 'e': 470 if (!qflg) 471 (void)printf("\nScript done on %s", 472 ctime(&tclock)); 473 (void)consume(fp, stamp.scr_len, buf, reg); 474 break; 475 case 'i': 476 /* throw input away */ 477 (void)consume(fp, stamp.scr_len, buf, reg); 478 break; 479 case 'o': 480 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 481 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 482 if (tsi.tv_nsec < 0) { 483 tsi.tv_sec -= 1; 484 tsi.tv_nsec += 1000000000; 485 } 486 if (usesleep) 487 (void)nanosleep(&tsi, NULL); 488 tsi = tso; 489 while (stamp.scr_len > 0) { 490 l = MIN(DEF_BUF, stamp.scr_len); 491 if (fread(buf, sizeof(char), l, fp) != l) 492 err(1, "cannot read buffer"); 493 494 (void)write(STDOUT_FILENO, buf, l); 495 stamp.scr_len -= l; 496 } 497 break; 498 default: 499 errx(1, "invalid direction"); 500 } 501 } 502 (void)fclose(fp); 503 exit(0); 504 } 505