1 /* $NetBSD: script.c,v 1.9 2003/08/07 11:15:48 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1992, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 __RCSID("$NetBSD: script.c,v 1.9 2003/08/07 11:15:48 agc Exp $"); 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/wait.h> 47 #include <sys/stat.h> 48 #include <sys/ioctl.h> 49 #include <sys/time.h> 50 #include <sys/uio.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <paths.h> 56 #include <signal.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <termios.h> 61 #include <time.h> 62 #include <tzfile.h> 63 #include <unistd.h> 64 #include <util.h> 65 66 struct stamp { 67 uint64_t scr_len; /* amount of data */ 68 uint64_t scr_sec; /* time it arrived in seconds... */ 69 uint32_t scr_usec; /* ...and microseconds */ 70 uint32_t scr_direction; /* 'i', 'o', etc (also indicates endianness) */ 71 }; 72 73 FILE *fscript; 74 int master, slave; 75 int child, subchild; 76 int outcc; 77 int usesleep, rawout; 78 char *fname; 79 80 struct termios tt; 81 82 void done __P((void)); 83 void dooutput __P((void)); 84 void doshell __P((void)); 85 void fail __P((void)); 86 void finish __P((int)); 87 int main __P((int, char **)); 88 void scriptflush __P((int)); 89 void record __P((FILE *, char *, size_t, int)); 90 void playback __P((FILE *)); 91 92 int 93 main(argc, argv) 94 int argc; 95 char *argv[]; 96 { 97 int cc; 98 struct termios rtt; 99 struct winsize win; 100 int aflg, pflg, ch; 101 char ibuf[BUFSIZ]; 102 103 aflg = 0; 104 pflg = 0; 105 usesleep = 1; 106 rawout = 0; 107 while ((ch = getopt(argc, argv, "adpr")) != -1) 108 switch(ch) { 109 case 'a': 110 aflg = 1; 111 break; 112 case 'd': 113 usesleep = 0; 114 break; 115 case 'p': 116 pflg = 1; 117 break; 118 case 'r': 119 rawout = 1; 120 break; 121 case '?': 122 default: 123 (void)fprintf(stderr, "usage: script [-apr] [file]\n"); 124 exit(1); 125 } 126 argc -= optind; 127 argv += optind; 128 129 if (argc > 0) 130 fname = argv[0]; 131 else 132 fname = "typescript"; 133 134 if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL) 135 err(1, "fopen %s", fname); 136 137 if (pflg) 138 playback(fscript); 139 140 (void)tcgetattr(STDIN_FILENO, &tt); 141 (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); 142 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 143 err(1, "openpty"); 144 145 (void)printf("Script started, output file is %s\n", fname); 146 rtt = tt; 147 cfmakeraw(&rtt); 148 rtt.c_lflag &= ~ECHO; 149 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 150 151 (void)signal(SIGCHLD, finish); 152 child = fork(); 153 if (child < 0) { 154 warn("fork"); 155 fail(); 156 } 157 if (child == 0) { 158 subchild = child = fork(); 159 if (child < 0) { 160 warn("fork"); 161 fail(); 162 } 163 if (child) 164 dooutput(); 165 else 166 doshell(); 167 } 168 169 if (!rawout) 170 (void)fclose(fscript); 171 while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) { 172 if (rawout) 173 record(fscript, ibuf, cc, 'i'); 174 (void)write(master, ibuf, cc); 175 } 176 done(); 177 /* NOTREACHED */ 178 return (0); 179 } 180 181 void 182 finish(signo) 183 int signo; 184 { 185 int die, pid, status; 186 187 die = 0; 188 while ((pid = wait3(&status, WNOHANG, 0)) > 0) 189 if (pid == child) 190 die = 1; 191 192 if (die) 193 done(); 194 } 195 196 void 197 dooutput() 198 { 199 struct itimerval value; 200 int cc; 201 time_t tvec; 202 char obuf[BUFSIZ]; 203 204 (void)close(STDIN_FILENO); 205 tvec = time(NULL); 206 if (rawout) 207 record(fscript, NULL, 0, 's'); 208 else 209 (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); 210 211 (void)signal(SIGALRM, scriptflush); 212 value.it_interval.tv_sec = SECSPERMIN / 2; 213 value.it_interval.tv_usec = 0; 214 value.it_value = value.it_interval; 215 (void)setitimer(ITIMER_REAL, &value, NULL); 216 for (;;) { 217 cc = read(master, obuf, sizeof (obuf)); 218 if (cc <= 0) 219 break; 220 (void)write(1, obuf, cc); 221 if (rawout) 222 record(fscript, obuf, cc, 'o'); 223 else 224 (void)fwrite(obuf, 1, cc, fscript); 225 outcc += cc; 226 } 227 done(); 228 } 229 230 void 231 scriptflush(signo) 232 int signo; 233 { 234 if (outcc) { 235 (void)fflush(fscript); 236 outcc = 0; 237 } 238 } 239 240 void 241 doshell() 242 { 243 char *shell; 244 245 shell = getenv("SHELL"); 246 if (shell == NULL) 247 shell = _PATH_BSHELL; 248 249 (void)close(master); 250 (void)fclose(fscript); 251 login_tty(slave); 252 execl(shell, shell, "-i", NULL); 253 warn("execl %s", shell); 254 fail(); 255 } 256 257 void 258 fail() 259 { 260 261 (void)kill(0, SIGTERM); 262 done(); 263 } 264 265 void 266 done() 267 { 268 time_t tvec; 269 270 if (subchild) { 271 tvec = time(NULL); 272 if (rawout) 273 record(fscript, NULL, 0, 'e'); 274 else 275 (void)fprintf(fscript,"\nScript done on %s", 276 ctime(&tvec)); 277 (void)fclose(fscript); 278 (void)close(master); 279 } else { 280 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 281 (void)printf("Script done, output file is %s\n", fname); 282 } 283 exit(0); 284 } 285 286 void 287 record(fscript, buf, cc, direction) 288 FILE *fscript; 289 char *buf; 290 size_t cc; 291 int direction; 292 { 293 struct iovec iov[2]; 294 struct stamp stamp; 295 struct timeval tv; 296 297 (void)gettimeofday(&tv, NULL); 298 stamp.scr_len = cc; 299 stamp.scr_sec = tv.tv_sec; 300 stamp.scr_usec = tv.tv_usec; 301 stamp.scr_direction = direction; 302 iov[0].iov_len = sizeof(stamp); 303 iov[0].iov_base = &stamp; 304 iov[1].iov_len = cc; 305 iov[1].iov_base = buf; 306 if (writev(fileno(fscript), &iov[0], 2) == -1) 307 err(1, "writev"); 308 } 309 310 #define swapstamp(stamp) do { \ 311 if (stamp.scr_direction > 0xff) { \ 312 stamp.scr_len = bswap64(stamp.scr_len); \ 313 stamp.scr_sec = bswap64(stamp.scr_sec); \ 314 stamp.scr_usec = bswap32(stamp.scr_usec); \ 315 stamp.scr_direction = bswap32(stamp.scr_direction); \ 316 } \ 317 } while (0/*CONSTCOND*/) 318 319 void 320 playback(fscript) 321 FILE *fscript; 322 { 323 struct timespec tsi, tso; 324 struct stamp stamp; 325 char buf[BUFSIZ]; 326 size_t l; 327 time_t clock; 328 329 do { 330 if (fread(&stamp, sizeof(stamp), 1, fscript) != 1) 331 err(1, "reading playback header"); 332 333 swapstamp(stamp); 334 l = fread(buf, 1, stamp.scr_len, fscript); 335 clock = stamp.scr_sec; 336 tso.tv_sec = stamp.scr_sec; 337 tso.tv_nsec = stamp.scr_usec * 1000; 338 339 switch (stamp.scr_direction) { 340 case 's': 341 (void)printf("Script started on %s", ctime(&clock)); 342 tsi = tso; 343 break; 344 case 'e': 345 (void)printf("\nScript done on %s", ctime(&clock)); 346 break; 347 case 'i': 348 /* throw input away */ 349 break; 350 case 'o': 351 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 352 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 353 if (tsi.tv_nsec < 0) { 354 tsi.tv_sec -= 1; 355 tsi.tv_nsec += 1000000000; 356 } 357 if (usesleep) 358 (void)nanosleep(&tsi, NULL); 359 tsi = tso; 360 (void)write(STDOUT_FILENO, buf, l); 361 break; 362 } 363 } while (stamp.scr_direction != 'e'); 364 365 (void)fclose(fscript); 366 exit(0); 367 } 368