1 /* 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)script.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/usr.bin/script/script.c,v 1.11.2.2 2004/03/13 09:21:00 cperciva Exp $ 36 * $DragonFly: src/usr.bin/script/script.c,v 1.10 2005/03/16 06:26:49 cpressey Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/wait.h> 41 #include <sys/stat.h> 42 #include <sys/ioctl.h> 43 #include <sys/time.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <libutil.h> 49 #include <paths.h> 50 #include <signal.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <termios.h> 55 #include <unistd.h> 56 57 static FILE *fscript; 58 static int master, slave; 59 static const char *fname; 60 static int qflg, ttyflg; 61 62 struct termios tt; 63 64 static void done(int) __dead2; 65 static void doshell(char **); 66 static int reap(pid_t); 67 static void usage(void); 68 69 int 70 main(int argc, char **argv) 71 { 72 int cc; 73 struct termios rtt, stt; 74 struct winsize win; 75 int aflg, kflg, ch, n; 76 struct timeval tv, *tvp; 77 time_t tvec, start; 78 char obuf[BUFSIZ]; 79 char ibuf[BUFSIZ]; 80 fd_set rfd; 81 int flushtime = 30; 82 pid_t child; 83 84 aflg = kflg = 0; 85 while ((ch = getopt(argc, argv, "aqkt:")) != -1) { 86 switch(ch) { 87 case 'a': 88 aflg = 1; 89 break; 90 case 'q': 91 qflg = 1; 92 break; 93 case 'k': 94 kflg = 1; 95 break; 96 case 't': 97 flushtime = atoi(optarg); 98 if (flushtime < 0) 99 errx(1, "invalid flush time %d", flushtime); 100 break; 101 case '?': 102 default: 103 usage(); 104 } 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (argc > 0) { 110 fname = argv[0]; 111 argv++; 112 argc--; 113 } else 114 fname = "typescript"; 115 116 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 117 err(1, "%s", fname); 118 119 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 120 if (tcgetattr(STDIN_FILENO, &tt) == -1) 121 err(1, "tcgetattr"); 122 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 123 err(1, "ioctl"); 124 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 125 err(1, "openpty"); 126 } else { 127 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 128 err(1, "openpty"); 129 } 130 131 if (!qflg) { 132 tvec = time(NULL); 133 printf("Script started, output file is %s\n", fname); 134 fprintf(fscript, "Script started on %s", ctime(&tvec)); 135 fflush(fscript); 136 } 137 138 if (ttyflg) { 139 rtt = tt; 140 cfmakeraw(&rtt); 141 rtt.c_lflag &= ~ECHO; 142 tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 143 } 144 145 child = fork(); 146 if (child < 0) { 147 warn("fork"); 148 done(1); 149 } 150 if (child == 0) 151 doshell(argv); 152 close(slave); 153 154 if (flushtime > 0) 155 tvp = &tv; 156 else 157 tvp = NULL; 158 159 start = time(0); 160 FD_ZERO(&rfd); 161 for (;;) { 162 FD_SET(master, &rfd); 163 FD_SET(STDIN_FILENO, &rfd); 164 if (flushtime > 0) { 165 tv.tv_sec = flushtime; 166 tv.tv_usec = 0; 167 } 168 n = select(master + 1, &rfd, 0, 0, tvp); 169 if (n < 0 && errno != EINTR) 170 break; 171 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 172 cc = read(STDIN_FILENO, ibuf, sizeof(ibuf)); 173 if (cc < 0) 174 break; 175 if (cc == 0) 176 write(master, ibuf, 0); 177 if (cc > 0) { 178 write(master, ibuf, cc); 179 if (kflg && tcgetattr(master, &stt) >= 0 && 180 ((stt.c_lflag & ECHO) == 0)) { 181 fwrite(ibuf, 1, cc, fscript); 182 } 183 } 184 } 185 if (n > 0 && FD_ISSET(master, &rfd)) { 186 cc = read(master, obuf, sizeof(obuf)); 187 if (cc <= 0) 188 break; 189 write(STDOUT_FILENO, obuf, cc); 190 fwrite(obuf, 1, cc, fscript); 191 } 192 tvec = time(0); 193 if (tvec - start >= flushtime) { 194 fflush(fscript); 195 start = tvec; 196 } 197 } 198 done(reap(child)); 199 } 200 201 static void 202 usage(void) 203 { 204 fprintf(stderr, 205 "usage: script [-a] [-q] [-k] [-t time] [file] [command]\n"); 206 exit(1); 207 } 208 209 static int 210 reap(pid_t child) 211 { 212 int e; 213 pid_t pid; 214 union wait status; 215 216 e = 0; 217 while ((pid = wait3((int *)&status, WNOHANG, NULL)) > 0) { 218 if (pid == child) { 219 if (WIFEXITED(status)) 220 e = WEXITSTATUS(status); 221 else if (WIFSIGNALED(status)) 222 e = WTERMSIG(status); 223 else /* can't happen */ 224 e = 1; 225 } 226 } 227 228 return(e); 229 } 230 231 static void 232 doshell(char **av) 233 { 234 const char *shell; 235 236 shell = getenv("SHELL"); 237 if (shell == NULL) 238 shell = _PATH_BSHELL; 239 240 close(master); 241 fclose(fscript); 242 login_tty(slave); 243 if (av[0] != NULL) { 244 execvp(av[0], av); 245 warn("%s", av[0]); 246 } else { 247 execl(shell, shell, "-i", NULL); 248 warn("%s", shell); 249 } 250 kill(0, SIGTERM); 251 done(1); 252 } 253 254 static void 255 done(int eno) 256 { 257 time_t tvec; 258 259 if (ttyflg) 260 tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 261 tvec = time(NULL); 262 if (!qflg) { 263 fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 264 printf("\nScript done, output file is '%s'\n", fname); 265 } 266 fclose(fscript); 267 close(master); 268 exit(eno); 269 } 270