1 /* $OpenBSD: script.c,v 1.2 1996/06/26 05:39:02 deraadt Exp $ */ 2 /* $NetBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1980, 1992, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93"; 46 #endif 47 static char rcsid[] = "$OpenBSD: script.c,v 1.2 1996/06/26 05:39:02 deraadt Exp $"; 48 #endif /* not lint */ 49 50 #include <sys/types.h> 51 #include <sys/wait.h> 52 #include <sys/stat.h> 53 #include <sys/ioctl.h> 54 #include <sys/time.h> 55 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <paths.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <termios.h> 64 #include <tzfile.h> 65 #include <unistd.h> 66 67 FILE *fscript; 68 int master, slave; 69 int child, subchild; 70 int outcc; 71 char *fname; 72 73 struct termios tt; 74 75 __dead void done __P((void)); 76 void dooutput __P((void)); 77 void doshell __P((void)); 78 void err __P((const char *, ...)); 79 void fail __P((void)); 80 void finish __P((int)); 81 void scriptflush __P((int)); 82 83 int 84 main(argc, argv) 85 int argc; 86 char *argv[]; 87 { 88 register int cc; 89 struct termios rtt; 90 struct winsize win; 91 int aflg, ch; 92 char ibuf[BUFSIZ]; 93 94 aflg = 0; 95 while ((ch = getopt(argc, argv, "a")) != EOF) 96 switch(ch) { 97 case 'a': 98 aflg = 1; 99 break; 100 case '?': 101 default: 102 (void)fprintf(stderr, "usage: script [-a] [file]\n"); 103 exit(1); 104 } 105 argc -= optind; 106 argv += optind; 107 108 if (argc > 0) 109 fname = argv[0]; 110 else 111 fname = "typescript"; 112 113 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 114 err("%s: %s", fname, strerror(errno)); 115 116 (void)tcgetattr(STDIN_FILENO, &tt); 117 (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); 118 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 119 err("openpty: %s", strerror(errno)); 120 121 (void)printf("Script started, output file is %s\n", fname); 122 rtt = tt; 123 cfmakeraw(&rtt); 124 rtt.c_lflag &= ~ECHO; 125 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 126 127 (void)signal(SIGCHLD, finish); 128 child = fork(); 129 if (child < 0) { 130 perror("fork"); 131 fail(); 132 } 133 if (child == 0) { 134 subchild = child = fork(); 135 if (child < 0) { 136 perror("fork"); 137 fail(); 138 } 139 if (child) 140 dooutput(); 141 else 142 doshell(); 143 } 144 145 (void)fclose(fscript); 146 while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) 147 (void)write(master, ibuf, cc); 148 done(); 149 } 150 151 void 152 finish(signo) 153 int signo; 154 { 155 register int die, pid; 156 union wait status; 157 158 die = 0; 159 while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0) 160 if (pid == child) 161 die = 1; 162 163 if (die) 164 done(); 165 } 166 167 void 168 dooutput() 169 { 170 struct itimerval value; 171 register int cc; 172 time_t tvec; 173 char obuf[BUFSIZ]; 174 175 (void)close(STDIN_FILENO); 176 tvec = time(NULL); 177 (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); 178 179 (void)signal(SIGALRM, scriptflush); 180 value.it_interval.tv_sec = SECSPERMIN / 2; 181 value.it_interval.tv_usec = 0; 182 value.it_value = value.it_interval; 183 (void)setitimer(ITIMER_REAL, &value, NULL); 184 for (;;) { 185 cc = read(master, obuf, sizeof (obuf)); 186 if (cc <= 0) 187 break; 188 (void)write(1, obuf, cc); 189 (void)fwrite(obuf, 1, cc, fscript); 190 outcc += cc; 191 } 192 done(); 193 } 194 195 void 196 scriptflush(signo) 197 int signo; 198 { 199 if (outcc) { 200 (void)fflush(fscript); 201 outcc = 0; 202 } 203 } 204 205 void 206 doshell() 207 { 208 char *shell; 209 210 shell = getenv("SHELL"); 211 if (shell == NULL) 212 shell = _PATH_BSHELL; 213 214 (void)close(master); 215 (void)fclose(fscript); 216 login_tty(slave); 217 execl(shell, "sh", "-i", NULL); 218 perror(shell); 219 fail(); 220 } 221 222 void 223 fail() 224 { 225 226 (void)kill(0, SIGTERM); 227 done(); 228 } 229 230 void 231 done() 232 { 233 time_t tvec; 234 235 if (subchild) { 236 tvec = time(NULL); 237 (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 238 (void)fclose(fscript); 239 (void)close(master); 240 } else { 241 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 242 (void)printf("Script done, output file is %s\n", fname); 243 } 244 exit(0); 245 } 246 247 #if __STDC__ 248 #include <stdarg.h> 249 #else 250 #include <varargs.h> 251 #endif 252 253 void 254 #if __STDC__ 255 err(const char *fmt, ...) 256 #else 257 err(fmt, va_alist) 258 char *fmt; 259 va_dcl 260 #endif 261 { 262 va_list ap; 263 #if __STDC__ 264 va_start(ap, fmt); 265 #else 266 va_start(ap); 267 #endif 268 (void)fprintf(stderr, "script: "); 269 (void)vfprintf(stderr, fmt, ap); 270 va_end(ap); 271 (void)fprintf(stderr, "\n"); 272 exit(1); 273 /* NOTREACHED */ 274 } 275