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