1 /* $NetBSD: script.c,v 1.10 2004/07/13 12:07:51 wiz 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 1.10 2004/07/13 12:07:51 wiz 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: %s [-adpr] [file]\n", 124 getprogname()); 125 exit(1); 126 } 127 argc -= optind; 128 argv += optind; 129 130 if (argc > 0) 131 fname = argv[0]; 132 else 133 fname = "typescript"; 134 135 if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL) 136 err(1, "fopen %s", fname); 137 138 if (pflg) 139 playback(fscript); 140 141 (void)tcgetattr(STDIN_FILENO, &tt); 142 (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); 143 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 144 err(1, "openpty"); 145 146 (void)printf("Script started, output file is %s\n", fname); 147 rtt = tt; 148 cfmakeraw(&rtt); 149 rtt.c_lflag &= ~ECHO; 150 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 151 152 (void)signal(SIGCHLD, finish); 153 child = fork(); 154 if (child < 0) { 155 warn("fork"); 156 fail(); 157 } 158 if (child == 0) { 159 subchild = child = fork(); 160 if (child < 0) { 161 warn("fork"); 162 fail(); 163 } 164 if (child) 165 dooutput(); 166 else 167 doshell(); 168 } 169 170 if (!rawout) 171 (void)fclose(fscript); 172 while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) { 173 if (rawout) 174 record(fscript, ibuf, cc, 'i'); 175 (void)write(master, ibuf, cc); 176 } 177 done(); 178 /* NOTREACHED */ 179 return (0); 180 } 181 182 void 183 finish(signo) 184 int signo; 185 { 186 int die, pid, status; 187 188 die = 0; 189 while ((pid = wait3(&status, WNOHANG, 0)) > 0) 190 if (pid == child) 191 die = 1; 192 193 if (die) 194 done(); 195 } 196 197 void 198 dooutput() 199 { 200 struct itimerval value; 201 int cc; 202 time_t tvec; 203 char obuf[BUFSIZ]; 204 205 (void)close(STDIN_FILENO); 206 tvec = time(NULL); 207 if (rawout) 208 record(fscript, NULL, 0, 's'); 209 else 210 (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); 211 212 (void)signal(SIGALRM, scriptflush); 213 value.it_interval.tv_sec = SECSPERMIN / 2; 214 value.it_interval.tv_usec = 0; 215 value.it_value = value.it_interval; 216 (void)setitimer(ITIMER_REAL, &value, NULL); 217 for (;;) { 218 cc = read(master, obuf, sizeof (obuf)); 219 if (cc <= 0) 220 break; 221 (void)write(1, obuf, cc); 222 if (rawout) 223 record(fscript, obuf, cc, 'o'); 224 else 225 (void)fwrite(obuf, 1, cc, fscript); 226 outcc += cc; 227 } 228 done(); 229 } 230 231 void 232 scriptflush(signo) 233 int signo; 234 { 235 if (outcc) { 236 (void)fflush(fscript); 237 outcc = 0; 238 } 239 } 240 241 void 242 doshell() 243 { 244 char *shell; 245 246 shell = getenv("SHELL"); 247 if (shell == NULL) 248 shell = _PATH_BSHELL; 249 250 (void)close(master); 251 (void)fclose(fscript); 252 login_tty(slave); 253 execl(shell, shell, "-i", NULL); 254 warn("execl %s", shell); 255 fail(); 256 } 257 258 void 259 fail() 260 { 261 262 (void)kill(0, SIGTERM); 263 done(); 264 } 265 266 void 267 done() 268 { 269 time_t tvec; 270 271 if (subchild) { 272 tvec = time(NULL); 273 if (rawout) 274 record(fscript, NULL, 0, 'e'); 275 else 276 (void)fprintf(fscript,"\nScript done on %s", 277 ctime(&tvec)); 278 (void)fclose(fscript); 279 (void)close(master); 280 } else { 281 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 282 (void)printf("Script done, output file is %s\n", fname); 283 } 284 exit(0); 285 } 286 287 void 288 record(fscript, buf, cc, direction) 289 FILE *fscript; 290 char *buf; 291 size_t cc; 292 int direction; 293 { 294 struct iovec iov[2]; 295 struct stamp stamp; 296 struct timeval tv; 297 298 (void)gettimeofday(&tv, NULL); 299 stamp.scr_len = cc; 300 stamp.scr_sec = tv.tv_sec; 301 stamp.scr_usec = tv.tv_usec; 302 stamp.scr_direction = direction; 303 iov[0].iov_len = sizeof(stamp); 304 iov[0].iov_base = &stamp; 305 iov[1].iov_len = cc; 306 iov[1].iov_base = buf; 307 if (writev(fileno(fscript), &iov[0], 2) == -1) 308 err(1, "writev"); 309 } 310 311 #define swapstamp(stamp) do { \ 312 if (stamp.scr_direction > 0xff) { \ 313 stamp.scr_len = bswap64(stamp.scr_len); \ 314 stamp.scr_sec = bswap64(stamp.scr_sec); \ 315 stamp.scr_usec = bswap32(stamp.scr_usec); \ 316 stamp.scr_direction = bswap32(stamp.scr_direction); \ 317 } \ 318 } while (0/*CONSTCOND*/) 319 320 void 321 playback(fscript) 322 FILE *fscript; 323 { 324 struct timespec tsi, tso; 325 struct stamp stamp; 326 char buf[BUFSIZ]; 327 size_t l; 328 time_t clock; 329 330 do { 331 if (fread(&stamp, sizeof(stamp), 1, fscript) != 1) 332 err(1, "reading playback header"); 333 334 swapstamp(stamp); 335 l = fread(buf, 1, stamp.scr_len, fscript); 336 clock = stamp.scr_sec; 337 tso.tv_sec = stamp.scr_sec; 338 tso.tv_nsec = stamp.scr_usec * 1000; 339 340 switch (stamp.scr_direction) { 341 case 's': 342 (void)printf("Script started on %s", ctime(&clock)); 343 tsi = tso; 344 break; 345 case 'e': 346 (void)printf("\nScript done on %s", ctime(&clock)); 347 break; 348 case 'i': 349 /* throw input away */ 350 break; 351 case 'o': 352 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 353 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 354 if (tsi.tv_nsec < 0) { 355 tsi.tv_sec -= 1; 356 tsi.tv_nsec += 1000000000; 357 } 358 if (usesleep) 359 (void)nanosleep(&tsi, NULL); 360 tsi = tso; 361 (void)write(STDOUT_FILENO, buf, l); 362 break; 363 } 364 } while (stamp.scr_direction != 'e'); 365 366 (void)fclose(fscript); 367 exit(0); 368 } 369