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