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 * 3. 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 | O_CLOEXEC)) == -1) 165 err(1, "open(\"/dev/filemon\", O_RDWR)"); 166 if ((fm_log = open(fmfname, 167 O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 168 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1) 169 err(1, "open(%s)", fmfname); 170 if (ioctl(fm_fd, FILEMON_SET_FD, &fm_log) < 0) 171 err(1, "Cannot set filemon log file descriptor"); 172 } 173 174 if (pflg) 175 playback(fscript); 176 177 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 178 if (tcgetattr(STDIN_FILENO, &tt) == -1) 179 err(1, "tcgetattr"); 180 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 181 err(1, "ioctl"); 182 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 183 err(1, "openpty"); 184 } else { 185 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 186 err(1, "openpty"); 187 } 188 189 if (rawout) 190 record(fscript, NULL, 0, 's'); 191 192 if (!qflg) { 193 tvec = time(NULL); 194 (void)printf("Script started, output file is %s\n", fname); 195 if (!rawout) { 196 (void)fprintf(fscript, "Script started on %s", 197 ctime(&tvec)); 198 if (argv[0]) { 199 showexit = 1; 200 fprintf(fscript, "Command: "); 201 for (k = 0 ; argv[k] ; ++k) 202 fprintf(fscript, "%s%s", k ? " " : "", 203 argv[k]); 204 fprintf(fscript, "\n"); 205 } 206 } 207 fflush(fscript); 208 if (fflg) { 209 (void)printf("Filemon started, output file is %s\n", 210 fmfname); 211 } 212 } 213 if (ttyflg) { 214 rtt = tt; 215 cfmakeraw(&rtt); 216 rtt.c_lflag &= ~ECHO; 217 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 218 } 219 220 child = fork(); 221 if (child < 0) { 222 warn("fork"); 223 done(1); 224 } 225 if (child == 0) { 226 if (fflg) { 227 int pid; 228 229 pid = getpid(); 230 if (ioctl(fm_fd, FILEMON_SET_PID, &pid) < 0) 231 err(1, "Cannot set filemon PID"); 232 } 233 234 doshell(argv); 235 } 236 close(slave); 237 238 start = tvec = time(0); 239 readstdin = 1; 240 for (;;) { 241 FD_ZERO(&rfd); 242 FD_SET(master, &rfd); 243 if (readstdin) 244 FD_SET(STDIN_FILENO, &rfd); 245 if (!readstdin && ttyflg) { 246 tv.tv_sec = 1; 247 tv.tv_usec = 0; 248 tvp = &tv; 249 readstdin = 1; 250 } else if (flushtime > 0) { 251 tv.tv_sec = flushtime - (tvec - start); 252 tv.tv_usec = 0; 253 tvp = &tv; 254 } else { 255 tvp = NULL; 256 } 257 n = select(master + 1, &rfd, 0, 0, tvp); 258 if (n < 0 && errno != EINTR) 259 break; 260 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 261 cc = read(STDIN_FILENO, ibuf, BUFSIZ); 262 if (cc < 0) 263 break; 264 if (cc == 0) { 265 if (tcgetattr(master, &stt) == 0 && 266 (stt.c_lflag & ICANON) != 0) { 267 (void)write(master, &stt.c_cc[VEOF], 1); 268 } 269 readstdin = 0; 270 } 271 if (cc > 0) { 272 if (rawout) 273 record(fscript, ibuf, cc, 'i'); 274 (void)write(master, ibuf, cc); 275 if (kflg && tcgetattr(master, &stt) >= 0 && 276 ((stt.c_lflag & ECHO) == 0)) { 277 (void)fwrite(ibuf, 1, cc, fscript); 278 } 279 } 280 } 281 if (n > 0 && FD_ISSET(master, &rfd)) { 282 cc = read(master, obuf, sizeof (obuf)); 283 if (cc <= 0) 284 break; 285 (void)write(STDOUT_FILENO, obuf, cc); 286 if (rawout) 287 record(fscript, obuf, cc, 'o'); 288 else 289 (void)fwrite(obuf, 1, cc, fscript); 290 } 291 tvec = time(0); 292 if (tvec - start >= flushtime) { 293 fflush(fscript); 294 start = tvec; 295 } 296 if (Fflg) 297 fflush(fscript); 298 } 299 finish(); 300 done(0); 301 } 302 303 static void 304 usage(void) 305 { 306 (void)fprintf(stderr, 307 "usage: script [-adfkpqr] [-t time] [file [command ...]]\n"); 308 exit(1); 309 } 310 311 static void 312 finish(void) 313 { 314 int e, status; 315 316 if (waitpid(child, &status, 0) == child) { 317 if (WIFEXITED(status)) 318 e = WEXITSTATUS(status); 319 else if (WIFSIGNALED(status)) 320 e = WTERMSIG(status); 321 else /* can't happen */ 322 e = 1; 323 done(e); 324 } 325 } 326 327 static void 328 doshell(char **av) 329 { 330 const char *shell; 331 332 shell = getenv("SHELL"); 333 if (shell == NULL) 334 shell = _PATH_BSHELL; 335 336 (void)close(master); 337 (void)fclose(fscript); 338 free(fmfname); 339 login_tty(slave); 340 setenv("SCRIPT", fname, 1); 341 if (av[0]) { 342 execvp(av[0], av); 343 warn("%s", av[0]); 344 } else { 345 execl(shell, shell, "-i", (char *)NULL); 346 warn("%s", shell); 347 } 348 exit(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 if (showexit) 364 (void)fprintf(fscript, "\nCommand exit status:" 365 " %d", eno); 366 (void)fprintf(fscript,"\nScript done on %s", 367 ctime(&tvec)); 368 } 369 (void)printf("\nScript done, output file is %s\n", fname); 370 if (fflg) { 371 (void)printf("Filemon done, output file is %s\n", 372 fmfname); 373 } 374 } 375 (void)fclose(fscript); 376 (void)close(master); 377 exit(eno); 378 } 379 380 static void 381 record(FILE *fp, char *buf, size_t cc, int direction) 382 { 383 struct iovec iov[2]; 384 struct stamp stamp; 385 struct timeval tv; 386 387 (void)gettimeofday(&tv, NULL); 388 stamp.scr_len = cc; 389 stamp.scr_sec = tv.tv_sec; 390 stamp.scr_usec = tv.tv_usec; 391 stamp.scr_direction = direction; 392 iov[0].iov_len = sizeof(stamp); 393 iov[0].iov_base = &stamp; 394 iov[1].iov_len = cc; 395 iov[1].iov_base = buf; 396 if (writev(fileno(fp), &iov[0], 2) == -1) 397 err(1, "writev"); 398 } 399 400 static void 401 consume(FILE *fp, off_t len, char *buf, int reg) 402 { 403 size_t l; 404 405 if (reg) { 406 if (fseeko(fp, len, SEEK_CUR) == -1) 407 err(1, NULL); 408 } 409 else { 410 while (len > 0) { 411 l = MIN(DEF_BUF, len); 412 if (fread(buf, sizeof(char), l, fp) != l) 413 err(1, "cannot read buffer"); 414 len -= l; 415 } 416 } 417 } 418 419 #define swapstamp(stamp) do { \ 420 if (stamp.scr_direction > 0xff) { \ 421 stamp.scr_len = bswap64(stamp.scr_len); \ 422 stamp.scr_sec = bswap64(stamp.scr_sec); \ 423 stamp.scr_usec = bswap32(stamp.scr_usec); \ 424 stamp.scr_direction = bswap32(stamp.scr_direction); \ 425 } \ 426 } while (0/*CONSTCOND*/) 427 428 static void 429 playback(FILE *fp) 430 { 431 struct timespec tsi, tso; 432 struct stamp stamp; 433 struct stat pst; 434 char buf[DEF_BUF]; 435 off_t nread, save_len; 436 size_t l; 437 time_t tclock; 438 int reg; 439 440 if (fstat(fileno(fp), &pst) == -1) 441 err(1, "fstat failed"); 442 443 reg = S_ISREG(pst.st_mode); 444 445 for (nread = 0; !reg || nread < pst.st_size; nread += save_len) { 446 if (fread(&stamp, sizeof(stamp), 1, fp) != 1) { 447 if (reg) 448 err(1, "reading playback header"); 449 else 450 break; 451 } 452 swapstamp(stamp); 453 save_len = sizeof(stamp); 454 455 if (reg && stamp.scr_len > 456 (uint64_t)(pst.st_size - save_len) - nread) 457 errx(1, "invalid stamp"); 458 459 save_len += stamp.scr_len; 460 tclock = stamp.scr_sec; 461 tso.tv_sec = stamp.scr_sec; 462 tso.tv_nsec = stamp.scr_usec * 1000; 463 464 switch (stamp.scr_direction) { 465 case 's': 466 if (!qflg) 467 (void)printf("Script started on %s", 468 ctime(&tclock)); 469 tsi = tso; 470 (void)consume(fp, stamp.scr_len, buf, reg); 471 break; 472 case 'e': 473 if (!qflg) 474 (void)printf("\nScript done on %s", 475 ctime(&tclock)); 476 (void)consume(fp, stamp.scr_len, buf, reg); 477 break; 478 case 'i': 479 /* throw input away */ 480 (void)consume(fp, stamp.scr_len, buf, reg); 481 break; 482 case 'o': 483 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 484 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 485 if (tsi.tv_nsec < 0) { 486 tsi.tv_sec -= 1; 487 tsi.tv_nsec += 1000000000; 488 } 489 if (usesleep) 490 (void)nanosleep(&tsi, NULL); 491 tsi = tso; 492 while (stamp.scr_len > 0) { 493 l = MIN(DEF_BUF, stamp.scr_len); 494 if (fread(buf, sizeof(char), l, fp) != l) 495 err(1, "cannot read buffer"); 496 497 (void)write(STDOUT_FILENO, buf, l); 498 stamp.scr_len -= l; 499 } 500 break; 501 default: 502 errx(1, "invalid direction"); 503 } 504 } 505 (void)fclose(fp); 506 exit(0); 507 } 508