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 * $DragonFly: src/usr.bin/script/script.c,v 1.10 2005/03/16 06:26:49 cpressey Exp $ 33 */ 34 35 #include <sys/types.h> 36 #include <sys/wait.h> 37 #include <sys/stat.h> 38 #include <sys/ioctl.h> 39 #include <sys/time.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <libutil.h> 45 #include <paths.h> 46 #include <signal.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <termios.h> 51 #include <unistd.h> 52 53 static FILE *fscript; 54 static int master, slave; 55 static const char *fname; 56 static int qflg, ttyflg; 57 58 struct termios tt; 59 60 static void done(int) __dead2; 61 static void doshell(char **); 62 static int reap(pid_t); 63 static void usage(void); 64 65 int 66 main(int argc, char **argv) 67 { 68 int cc; 69 struct termios rtt, stt; 70 struct winsize win; 71 int aflg, kflg, ch, n; 72 struct timeval tv, *tvp; 73 time_t tvec, start; 74 char obuf[BUFSIZ]; 75 char ibuf[BUFSIZ]; 76 fd_set rfd; 77 int flushtime = 30; 78 pid_t child; 79 80 aflg = kflg = 0; 81 while ((ch = getopt(argc, argv, "aqkt:")) != -1) { 82 switch(ch) { 83 case 'a': 84 aflg = 1; 85 break; 86 case 'q': 87 qflg = 1; 88 break; 89 case 'k': 90 kflg = 1; 91 break; 92 case 't': 93 flushtime = atoi(optarg); 94 if (flushtime < 0) 95 errx(1, "invalid flush time %d", flushtime); 96 break; 97 case '?': 98 default: 99 usage(); 100 } 101 } 102 argc -= optind; 103 argv += optind; 104 105 if (argc > 0) { 106 fname = argv[0]; 107 argv++; 108 argc--; 109 } else 110 fname = "typescript"; 111 112 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 113 err(1, "%s", fname); 114 115 if ((ttyflg = isatty(STDIN_FILENO)) != 0) { 116 if (tcgetattr(STDIN_FILENO, &tt) == -1) 117 err(1, "tcgetattr"); 118 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) 119 err(1, "ioctl"); 120 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 121 err(1, "openpty"); 122 } else { 123 if (openpty(&master, &slave, NULL, NULL, NULL) == -1) 124 err(1, "openpty"); 125 } 126 127 if (!qflg) { 128 tvec = time(NULL); 129 printf("Script started, output file is %s\n", fname); 130 fprintf(fscript, "Script started on %s", ctime(&tvec)); 131 fflush(fscript); 132 } 133 134 if (ttyflg) { 135 rtt = tt; 136 cfmakeraw(&rtt); 137 rtt.c_lflag &= ~ECHO; 138 tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 139 } 140 141 child = fork(); 142 if (child < 0) { 143 warn("fork"); 144 done(1); 145 } 146 if (child == 0) 147 doshell(argv); 148 close(slave); 149 150 if (flushtime > 0) 151 tvp = &tv; 152 else 153 tvp = NULL; 154 155 start = time(0); 156 FD_ZERO(&rfd); 157 for (;;) { 158 FD_SET(master, &rfd); 159 FD_SET(STDIN_FILENO, &rfd); 160 if (flushtime > 0) { 161 tv.tv_sec = flushtime; 162 tv.tv_usec = 0; 163 } 164 n = select(master + 1, &rfd, 0, 0, tvp); 165 if (n < 0 && errno != EINTR) 166 break; 167 if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { 168 cc = read(STDIN_FILENO, ibuf, sizeof(ibuf)); 169 if (cc < 0) 170 break; 171 if (cc == 0) 172 write(master, ibuf, 0); 173 if (cc > 0) { 174 write(master, ibuf, cc); 175 if (kflg && tcgetattr(master, &stt) >= 0 && 176 ((stt.c_lflag & ECHO) == 0)) { 177 fwrite(ibuf, 1, cc, fscript); 178 } 179 } 180 } 181 if (n > 0 && FD_ISSET(master, &rfd)) { 182 cc = read(master, obuf, sizeof(obuf)); 183 if (cc <= 0) 184 break; 185 write(STDOUT_FILENO, obuf, cc); 186 fwrite(obuf, 1, cc, fscript); 187 } 188 tvec = time(0); 189 if (tvec - start >= flushtime) { 190 fflush(fscript); 191 start = tvec; 192 } 193 } 194 done(reap(child)); 195 } 196 197 static void 198 usage(void) 199 { 200 fprintf(stderr, 201 "usage: script [-a] [-q] [-k] [-t time] [file] [command]\n"); 202 exit(1); 203 } 204 205 static int 206 reap(pid_t child) 207 { 208 int e; 209 pid_t pid; 210 union wait status; 211 212 e = 0; 213 while ((pid = wait3((int *)&status, WNOHANG, NULL)) > 0) { 214 if (pid == child) { 215 if (WIFEXITED(status)) 216 e = WEXITSTATUS(status); 217 else if (WIFSIGNALED(status)) 218 e = WTERMSIG(status); 219 else /* can't happen */ 220 e = 1; 221 } 222 } 223 224 return(e); 225 } 226 227 static void 228 doshell(char **av) 229 { 230 const char *shell; 231 232 shell = getenv("SHELL"); 233 if (shell == NULL) 234 shell = _PATH_BSHELL; 235 236 close(master); 237 fclose(fscript); 238 login_tty(slave); 239 if (av[0] != NULL) { 240 execvp(av[0], av); 241 warn("%s", av[0]); 242 } else { 243 execl(shell, shell, "-i", NULL); 244 warn("%s", shell); 245 } 246 kill(0, SIGTERM); 247 done(1); 248 } 249 250 static void 251 done(int eno) 252 { 253 time_t tvec; 254 255 if (ttyflg) 256 tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 257 tvec = time(NULL); 258 if (!qflg) { 259 fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 260 printf("\nScript done, output file is '%s'\n", fname); 261 } 262 fclose(fscript); 263 close(master); 264 exit(eno); 265 } 266