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, showexit; 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 showexit = 0; 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 showexit = 1; 203 fprintf(fscript, "Command: "); 204 for (k = 0 ; argv[k] ; ++k) 205 fprintf(fscript, "%s%s", k ? " " : "", 206 argv[k]); 207 fprintf(fscript, "\n"); 208 } 209 } 210 fflush(fscript); 211 if (fflg) { 212 (void)printf("Filemon started, output file is %s\n", 213 fmfname); 214 } 215 } 216 if (ttyflg) { 217 rtt = tt; 218 cfmakeraw(&rtt); 219 rtt.c_lflag &= ~ECHO; 220 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 221 } 222 223 child = fork(); 224 if (child < 0) { 225 warn("fork"); 226 done(1); 227 } 228 if (child == 0) { 229 if (fflg) { 230 int pid; 231 232 pid = getpid(); 233 if (ioctl(fm_fd, FILEMON_SET_PID, &pid) < 0) 234 err(1, "Cannot set filemon PID"); 235 } 236 237 doshell(argv); 238 } 239 close(slave); 240 241 start = tvec = time(0); 242 readstdin = 1; 243 for (;;) { 244 FD_ZERO(&rfd); 245 FD_SET(master, &rfd); 246 if (readstdin) 247 FD_SET(STDIN_FILENO, &rfd); 248 if (!readstdin && ttyflg) { 249 tv.tv_sec = 1; 250 tv.tv_usec = 0; 251 tvp = &tv; 252 readstdin = 1; 253 } else if (flushtime > 0) { 254 tv.tv_sec = flushtime - (tvec - start); 255 tv.tv_usec = 0; 256 tvp = &tv; 257 } else { 258 tvp = NULL; 259 } 260 n = select(master + 1, &rfd, 0, 0, tvp); 261 if (n < 0 && errno != EINTR) 262 break; 263 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 264 cc = read(STDIN_FILENO, ibuf, BUFSIZ); 265 if (cc < 0) 266 break; 267 if (cc == 0) { 268 if (tcgetattr(master, &stt) == 0 && 269 (stt.c_lflag & ICANON) != 0) { 270 (void)write(master, &stt.c_cc[VEOF], 1); 271 } 272 readstdin = 0; 273 } 274 if (cc > 0) { 275 if (rawout) 276 record(fscript, ibuf, cc, 'i'); 277 (void)write(master, ibuf, cc); 278 if (kflg && tcgetattr(master, &stt) >= 0 && 279 ((stt.c_lflag & ECHO) == 0)) { 280 (void)fwrite(ibuf, 1, cc, fscript); 281 } 282 } 283 } 284 if (n > 0 && FD_ISSET(master, &rfd)) { 285 cc = read(master, obuf, sizeof (obuf)); 286 if (cc <= 0) 287 break; 288 (void)write(STDOUT_FILENO, obuf, cc); 289 if (rawout) 290 record(fscript, obuf, cc, 'o'); 291 else 292 (void)fwrite(obuf, 1, cc, fscript); 293 } 294 tvec = time(0); 295 if (tvec - start >= flushtime) { 296 fflush(fscript); 297 start = tvec; 298 } 299 if (Fflg) 300 fflush(fscript); 301 } 302 finish(); 303 done(0); 304 } 305 306 static void 307 usage(void) 308 { 309 (void)fprintf(stderr, 310 "usage: script [-adfkpqr] [-t time] [file [command ...]]\n"); 311 exit(1); 312 } 313 314 static void 315 finish(void) 316 { 317 int e, status; 318 319 if (waitpid(child, &status, 0) == child) { 320 if (WIFEXITED(status)) 321 e = WEXITSTATUS(status); 322 else if (WIFSIGNALED(status)) 323 e = WTERMSIG(status); 324 else /* can't happen */ 325 e = 1; 326 done(e); 327 } 328 } 329 330 static void 331 doshell(char **av) 332 { 333 const char *shell; 334 335 shell = getenv("SHELL"); 336 if (shell == NULL) 337 shell = _PATH_BSHELL; 338 339 (void)close(master); 340 (void)fclose(fscript); 341 free(fmfname); 342 login_tty(slave); 343 setenv("SCRIPT", fname, 1); 344 if (av[0]) { 345 execvp(av[0], av); 346 warn("%s", av[0]); 347 } else { 348 execl(shell, shell, "-i", (char *)NULL); 349 warn("%s", shell); 350 } 351 exit(1); 352 } 353 354 static void 355 done(int eno) 356 { 357 time_t tvec; 358 359 if (ttyflg) 360 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 361 tvec = time(NULL); 362 if (rawout) 363 record(fscript, NULL, 0, 'e'); 364 if (!qflg) { 365 if (!rawout) { 366 if (showexit) 367 (void)fprintf(fscript, "\nCommand exit status:" 368 " %d", eno); 369 (void)fprintf(fscript,"\nScript done on %s", 370 ctime(&tvec)); 371 } 372 (void)printf("\nScript done, output file is %s\n", fname); 373 if (fflg) { 374 (void)printf("Filemon done, output file is %s\n", 375 fmfname); 376 } 377 } 378 (void)fclose(fscript); 379 (void)close(master); 380 exit(eno); 381 } 382 383 static void 384 record(FILE *fp, char *buf, size_t cc, int direction) 385 { 386 struct iovec iov[2]; 387 struct stamp stamp; 388 struct timeval tv; 389 390 (void)gettimeofday(&tv, NULL); 391 stamp.scr_len = cc; 392 stamp.scr_sec = tv.tv_sec; 393 stamp.scr_usec = tv.tv_usec; 394 stamp.scr_direction = direction; 395 iov[0].iov_len = sizeof(stamp); 396 iov[0].iov_base = &stamp; 397 iov[1].iov_len = cc; 398 iov[1].iov_base = buf; 399 if (writev(fileno(fp), &iov[0], 2) == -1) 400 err(1, "writev"); 401 } 402 403 static void 404 consume(FILE *fp, off_t len, char *buf, int reg) 405 { 406 size_t l; 407 408 if (reg) { 409 if (fseeko(fp, len, SEEK_CUR) == -1) 410 err(1, NULL); 411 } 412 else { 413 while (len > 0) { 414 l = MIN(DEF_BUF, len); 415 if (fread(buf, sizeof(char), l, fp) != l) 416 err(1, "cannot read buffer"); 417 len -= l; 418 } 419 } 420 } 421 422 #define swapstamp(stamp) do { \ 423 if (stamp.scr_direction > 0xff) { \ 424 stamp.scr_len = bswap64(stamp.scr_len); \ 425 stamp.scr_sec = bswap64(stamp.scr_sec); \ 426 stamp.scr_usec = bswap32(stamp.scr_usec); \ 427 stamp.scr_direction = bswap32(stamp.scr_direction); \ 428 } \ 429 } while (0/*CONSTCOND*/) 430 431 static void 432 playback(FILE *fp) 433 { 434 struct timespec tsi, tso; 435 struct stamp stamp; 436 struct stat pst; 437 char buf[DEF_BUF]; 438 off_t nread, save_len; 439 size_t l; 440 time_t tclock; 441 int reg; 442 443 if (fstat(fileno(fp), &pst) == -1) 444 err(1, "fstat failed"); 445 446 reg = S_ISREG(pst.st_mode); 447 448 for (nread = 0; !reg || nread < pst.st_size; nread += save_len) { 449 if (fread(&stamp, sizeof(stamp), 1, fp) != 1) { 450 if (reg) 451 err(1, "reading playback header"); 452 else 453 break; 454 } 455 swapstamp(stamp); 456 save_len = sizeof(stamp); 457 458 if (reg && stamp.scr_len > 459 (uint64_t)(pst.st_size - save_len) - nread) 460 errx(1, "invalid stamp"); 461 462 save_len += stamp.scr_len; 463 tclock = stamp.scr_sec; 464 tso.tv_sec = stamp.scr_sec; 465 tso.tv_nsec = stamp.scr_usec * 1000; 466 467 switch (stamp.scr_direction) { 468 case 's': 469 if (!qflg) 470 (void)printf("Script started on %s", 471 ctime(&tclock)); 472 tsi = tso; 473 (void)consume(fp, stamp.scr_len, buf, reg); 474 break; 475 case 'e': 476 if (!qflg) 477 (void)printf("\nScript done on %s", 478 ctime(&tclock)); 479 (void)consume(fp, stamp.scr_len, buf, reg); 480 break; 481 case 'i': 482 /* throw input away */ 483 (void)consume(fp, stamp.scr_len, buf, reg); 484 break; 485 case 'o': 486 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 487 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 488 if (tsi.tv_nsec < 0) { 489 tsi.tv_sec -= 1; 490 tsi.tv_nsec += 1000000000; 491 } 492 if (usesleep) 493 (void)nanosleep(&tsi, NULL); 494 tsi = tso; 495 while (stamp.scr_len > 0) { 496 l = MIN(DEF_BUF, stamp.scr_len); 497 if (fread(buf, sizeof(char), l, fp) != l) 498 err(1, "cannot read buffer"); 499 500 (void)write(STDOUT_FILENO, buf, l); 501 stamp.scr_len -= l; 502 } 503 break; 504 default: 505 errx(1, "invalid direction"); 506 } 507 } 508 (void)fclose(fp); 509 exit(0); 510 } 511