1 /* $OpenBSD: script.c,v 1.11 2000/03/22 20:25:19 ericj 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 1.11 2000/03/22 20:25:19 ericj 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 #include <util.h> 68 #include <err.h> 69 70 FILE *fscript; 71 int master, slave; 72 int child, subchild; 73 int outcc; 74 char *fname; 75 76 struct termios tt; 77 78 __dead void done __P((int)); 79 void dooutput __P((void)); 80 void doshell __P((void)); 81 void fail __P((void)); 82 void finish __P((int)); 83 void scriptflush __P((int)); 84 85 int 86 main(argc, argv) 87 int argc; 88 char *argv[]; 89 { 90 register int cc; 91 struct termios rtt; 92 struct winsize win; 93 int aflg, ch; 94 char ibuf[BUFSIZ]; 95 96 aflg = 0; 97 while ((ch = getopt(argc, argv, "a")) != -1) 98 switch(ch) { 99 case 'a': 100 aflg = 1; 101 break; 102 case '?': 103 default: 104 (void)fprintf(stderr, "usage: script [-a] [file]\n"); 105 exit(1); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc > 0) 111 fname = argv[0]; 112 else 113 fname = "typescript"; 114 115 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 116 err(1, fname); 117 118 (void)tcgetattr(STDIN_FILENO, &tt); 119 (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); 120 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 121 err(1, "openpty"); 122 123 (void)printf("Script started, output file is %s\n", fname); 124 rtt = tt; 125 cfmakeraw(&rtt); 126 rtt.c_lflag &= ~ECHO; 127 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 128 129 (void)signal(SIGCHLD, finish); 130 child = fork(); 131 if (child < 0) { 132 perror("fork"); 133 fail(); 134 } 135 if (child == 0) { 136 subchild = child = fork(); 137 if (child < 0) { 138 perror("fork"); 139 fail(); 140 } 141 if (child) 142 dooutput(); 143 else 144 doshell(); 145 } 146 147 (void)fclose(fscript); 148 while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) 149 (void)write(master, ibuf, cc); 150 done(0); 151 } 152 153 void 154 finish(signo) 155 int signo; 156 { 157 register int die, pid; 158 int save_errno = errno; 159 int status, e; 160 161 die = e = 0; 162 while ((pid = wait3(&status, WNOHANG, 0)) > 0) 163 if (pid == child) { 164 die = 1; 165 if (WIFEXITED(status)) 166 e = WEXITSTATUS(status); 167 else 168 e = 1; 169 } 170 171 if (die) 172 done(e); 173 errno = save_errno; 174 } 175 176 void 177 dooutput() 178 { 179 struct itimerval value; 180 register int cc; 181 time_t tvec; 182 char obuf[BUFSIZ]; 183 184 (void)close(STDIN_FILENO); 185 tvec = time(NULL); 186 (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); 187 188 (void)signal(SIGALRM, scriptflush); 189 value.it_interval.tv_sec = SECSPERMIN / 2; 190 value.it_interval.tv_usec = 0; 191 value.it_value = value.it_interval; 192 (void)setitimer(ITIMER_REAL, &value, NULL); 193 for (;;) { 194 cc = read(master, obuf, sizeof (obuf)); 195 if (cc <= 0) 196 break; 197 (void)write(1, obuf, cc); 198 (void)fwrite(obuf, 1, cc, fscript); 199 outcc += cc; 200 } 201 done(0); 202 } 203 204 void 205 scriptflush(signo) 206 int signo; 207 { 208 int save_errno = errno; 209 210 if (outcc) { 211 (void)fflush(fscript); 212 outcc = 0; 213 } 214 errno = save_errno; 215 } 216 217 void 218 doshell() 219 { 220 char *shell; 221 222 shell = getenv("SHELL"); 223 if (shell == NULL) 224 shell = _PATH_BSHELL; 225 226 (void)close(master); 227 (void)fclose(fscript); 228 login_tty(slave); 229 execl(shell, shell, "-i", NULL); 230 perror(shell); 231 fail(); 232 } 233 234 void 235 fail() 236 { 237 238 (void)kill(0, SIGTERM); 239 done(1); 240 } 241 242 void 243 done(eval) 244 int eval; 245 { 246 time_t tvec; 247 248 if (subchild) { 249 tvec = time(NULL); 250 (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 251 (void)fclose(fscript); 252 (void)close(master); 253 } else { 254 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 255 (void)printf("Script done, output file is %s\n", fname); 256 } 257 exit(eval); 258 } 259 260