1 /* $NetBSD: script.c,v 1.11 2006/03/29 15:40:49 rpaulo 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 1.11 2006/03/29 15:40:49 rpaulo 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(void); 83 void dooutput(void); 84 void doshell(void); 85 void fail(void); 86 void finish(int); 87 int main(int, char **); 88 void scriptflush(int); 89 void record(FILE *, char *, size_t, int); 90 void playback(FILE *); 91 92 int 93 main(int argc, char *argv[]) 94 { 95 int cc; 96 struct termios rtt; 97 struct winsize win; 98 int aflg, pflg, ch; 99 char ibuf[BUFSIZ]; 100 101 aflg = 0; 102 pflg = 0; 103 usesleep = 1; 104 rawout = 0; 105 while ((ch = getopt(argc, argv, "adpr")) != -1) 106 switch(ch) { 107 case 'a': 108 aflg = 1; 109 break; 110 case 'd': 111 usesleep = 0; 112 break; 113 case 'p': 114 pflg = 1; 115 break; 116 case 'r': 117 rawout = 1; 118 break; 119 case '?': 120 default: 121 (void)fprintf(stderr, "usage: %s [-adpr] [file]\n", 122 getprogname()); 123 exit(1); 124 } 125 argc -= optind; 126 argv += optind; 127 128 if (argc > 0) 129 fname = argv[0]; 130 else 131 fname = "typescript"; 132 133 if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL) 134 err(1, "fopen %s", fname); 135 136 if (pflg) 137 playback(fscript); 138 139 (void)tcgetattr(STDIN_FILENO, &tt); 140 (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); 141 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 142 err(1, "openpty"); 143 144 (void)printf("Script started, output file is %s\n", fname); 145 rtt = tt; 146 cfmakeraw(&rtt); 147 rtt.c_lflag &= ~ECHO; 148 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 149 150 (void)signal(SIGCHLD, finish); 151 child = fork(); 152 if (child < 0) { 153 warn("fork"); 154 fail(); 155 } 156 if (child == 0) { 157 subchild = child = fork(); 158 if (child < 0) { 159 warn("fork"); 160 fail(); 161 } 162 if (child) 163 dooutput(); 164 else 165 doshell(); 166 } 167 168 if (!rawout) 169 (void)fclose(fscript); 170 while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) { 171 if (rawout) 172 record(fscript, ibuf, cc, 'i'); 173 (void)write(master, ibuf, cc); 174 } 175 done(); 176 /* NOTREACHED */ 177 return (0); 178 } 179 180 void 181 finish(int signo) 182 { 183 int die, pid, status; 184 185 die = 0; 186 while ((pid = wait3(&status, WNOHANG, 0)) > 0) 187 if (pid == child) 188 die = 1; 189 190 if (die) 191 done(); 192 } 193 194 void 195 dooutput() 196 { 197 struct itimerval value; 198 int cc; 199 time_t tvec; 200 char obuf[BUFSIZ]; 201 202 (void)close(STDIN_FILENO); 203 tvec = time(NULL); 204 if (rawout) 205 record(fscript, NULL, 0, 's'); 206 else 207 (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); 208 209 (void)signal(SIGALRM, scriptflush); 210 value.it_interval.tv_sec = SECSPERMIN / 2; 211 value.it_interval.tv_usec = 0; 212 value.it_value = value.it_interval; 213 (void)setitimer(ITIMER_REAL, &value, NULL); 214 for (;;) { 215 cc = read(master, obuf, sizeof (obuf)); 216 if (cc <= 0) 217 break; 218 (void)write(1, obuf, cc); 219 if (rawout) 220 record(fscript, obuf, cc, 'o'); 221 else 222 (void)fwrite(obuf, 1, cc, fscript); 223 outcc += cc; 224 } 225 done(); 226 } 227 228 void 229 scriptflush(int signo) 230 { 231 if (outcc) { 232 (void)fflush(fscript); 233 outcc = 0; 234 } 235 } 236 237 void 238 doshell() 239 { 240 char *shell; 241 242 shell = getenv("SHELL"); 243 if (shell == NULL) 244 shell = _PATH_BSHELL; 245 246 (void)close(master); 247 (void)fclose(fscript); 248 login_tty(slave); 249 execl(shell, shell, "-i", NULL); 250 warn("execl %s", shell); 251 fail(); 252 } 253 254 void 255 fail() 256 { 257 258 (void)kill(0, SIGTERM); 259 done(); 260 } 261 262 void 263 done() 264 { 265 time_t tvec; 266 267 if (subchild) { 268 tvec = time(NULL); 269 if (rawout) 270 record(fscript, NULL, 0, 'e'); 271 else 272 (void)fprintf(fscript,"\nScript done on %s", 273 ctime(&tvec)); 274 (void)fclose(fscript); 275 (void)close(master); 276 } else { 277 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 278 (void)printf("Script done, output file is %s\n", fname); 279 } 280 exit(0); 281 } 282 283 void 284 record(FILE *fscript, char *buf, size_t cc, int direction) 285 { 286 struct iovec iov[2]; 287 struct stamp stamp; 288 struct timeval tv; 289 290 (void)gettimeofday(&tv, NULL); 291 stamp.scr_len = cc; 292 stamp.scr_sec = tv.tv_sec; 293 stamp.scr_usec = tv.tv_usec; 294 stamp.scr_direction = direction; 295 iov[0].iov_len = sizeof(stamp); 296 iov[0].iov_base = &stamp; 297 iov[1].iov_len = cc; 298 iov[1].iov_base = buf; 299 if (writev(fileno(fscript), &iov[0], 2) == -1) 300 err(1, "writev"); 301 } 302 303 #define swapstamp(stamp) do { \ 304 if (stamp.scr_direction > 0xff) { \ 305 stamp.scr_len = bswap64(stamp.scr_len); \ 306 stamp.scr_sec = bswap64(stamp.scr_sec); \ 307 stamp.scr_usec = bswap32(stamp.scr_usec); \ 308 stamp.scr_direction = bswap32(stamp.scr_direction); \ 309 } \ 310 } while (0/*CONSTCOND*/) 311 312 void 313 playback(FILE *fscript) 314 { 315 struct timespec tsi, tso; 316 struct stamp stamp; 317 char buf[BUFSIZ]; 318 size_t l; 319 time_t clock; 320 321 do { 322 if (fread(&stamp, sizeof(stamp), 1, fscript) != 1) 323 err(1, "reading playback header"); 324 325 swapstamp(stamp); 326 l = fread(buf, 1, stamp.scr_len, fscript); 327 clock = stamp.scr_sec; 328 tso.tv_sec = stamp.scr_sec; 329 tso.tv_nsec = stamp.scr_usec * 1000; 330 331 switch (stamp.scr_direction) { 332 case 's': 333 (void)printf("Script started on %s", ctime(&clock)); 334 tsi = tso; 335 break; 336 case 'e': 337 (void)printf("\nScript done on %s", ctime(&clock)); 338 break; 339 case 'i': 340 /* throw input away */ 341 break; 342 case 'o': 343 tsi.tv_sec = tso.tv_sec - tsi.tv_sec; 344 tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec; 345 if (tsi.tv_nsec < 0) { 346 tsi.tv_sec -= 1; 347 tsi.tv_nsec += 1000000000; 348 } 349 if (usesleep) 350 (void)nanosleep(&tsi, NULL); 351 tsi = tso; 352 (void)write(STDOUT_FILENO, buf, l); 353 break; 354 } 355 } while (stamp.scr_direction != 'e'); 356 357 (void)fclose(fscript); 358 exit(0); 359 } 360