1 /* $NetBSD: script.c,v 1.5 1997/10/19 22:57:49 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) 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 __RCSID("$NetBSD: script.c,v 1.5 1997/10/19 22:57:49 lukem 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 <err.h> 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 #include <util.h> 67 68 FILE *fscript; 69 int master, slave; 70 int child, subchild; 71 int outcc; 72 char *fname; 73 74 struct termios tt; 75 76 void done __P((void)); 77 void dooutput __P((void)); 78 void doshell __P((void)); 79 void fail __P((void)); 80 void finish __P((int)); 81 int main __P((int, char **)); 82 void scriptflush __P((int)); 83 84 int 85 main(argc, argv) 86 int argc; 87 char *argv[]; 88 { 89 int cc; 90 struct termios rtt; 91 struct winsize win; 92 int aflg, ch; 93 char ibuf[BUFSIZ]; 94 95 aflg = 0; 96 while ((ch = getopt(argc, argv, "a")) != -1) 97 switch(ch) { 98 case 'a': 99 aflg = 1; 100 break; 101 case '?': 102 default: 103 (void)fprintf(stderr, "usage: script [-a] [file]\n"); 104 exit(1); 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (argc > 0) 110 fname = argv[0]; 111 else 112 fname = "typescript"; 113 114 if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) 115 err(1, "fopen %s", fname); 116 117 (void)tcgetattr(STDIN_FILENO, &tt); 118 (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); 119 if (openpty(&master, &slave, NULL, &tt, &win) == -1) 120 err(1, "openpty"); 121 122 (void)printf("Script started, output file is %s\n", fname); 123 rtt = tt; 124 cfmakeraw(&rtt); 125 rtt.c_lflag &= ~ECHO; 126 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); 127 128 (void)signal(SIGCHLD, finish); 129 child = fork(); 130 if (child < 0) { 131 warn("fork"); 132 fail(); 133 } 134 if (child == 0) { 135 subchild = child = fork(); 136 if (child < 0) { 137 warn("fork"); 138 fail(); 139 } 140 if (child) 141 dooutput(); 142 else 143 doshell(); 144 } 145 146 (void)fclose(fscript); 147 while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) 148 (void)write(master, ibuf, cc); 149 done(); 150 /* NOTREACHED */ 151 return (0); 152 } 153 154 void 155 finish(signo) 156 int signo; 157 { 158 int die, pid; 159 union wait status; 160 161 die = 0; 162 while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0) 163 if (pid == child) 164 die = 1; 165 166 if (die) 167 done(); 168 } 169 170 void 171 dooutput() 172 { 173 struct itimerval value; 174 int cc; 175 time_t tvec; 176 char obuf[BUFSIZ]; 177 178 (void)close(STDIN_FILENO); 179 tvec = time(NULL); 180 (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); 181 182 (void)signal(SIGALRM, scriptflush); 183 value.it_interval.tv_sec = SECSPERMIN / 2; 184 value.it_interval.tv_usec = 0; 185 value.it_value = value.it_interval; 186 (void)setitimer(ITIMER_REAL, &value, NULL); 187 for (;;) { 188 cc = read(master, obuf, sizeof (obuf)); 189 if (cc <= 0) 190 break; 191 (void)write(1, obuf, cc); 192 (void)fwrite(obuf, 1, cc, fscript); 193 outcc += cc; 194 } 195 done(); 196 } 197 198 void 199 scriptflush(signo) 200 int signo; 201 { 202 if (outcc) { 203 (void)fflush(fscript); 204 outcc = 0; 205 } 206 } 207 208 void 209 doshell() 210 { 211 char *shell; 212 213 shell = getenv("SHELL"); 214 if (shell == NULL) 215 shell = _PATH_BSHELL; 216 217 (void)close(master); 218 (void)fclose(fscript); 219 login_tty(slave); 220 execl(shell, shell, "-i", NULL); 221 warn("execl %s", shell); 222 fail(); 223 } 224 225 void 226 fail() 227 { 228 229 (void)kill(0, SIGTERM); 230 done(); 231 } 232 233 void 234 done() 235 { 236 time_t tvec; 237 238 if (subchild) { 239 tvec = time(NULL); 240 (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec)); 241 (void)fclose(fscript); 242 (void)close(master); 243 } else { 244 (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); 245 (void)printf("Script done, output file is %s\n", fname); 246 } 247 exit(0); 248 } 249