/* $OpenBSD: script.c,v 1.14 2001/01/11 19:26:01 deraadt Exp $ */ /* $NetBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc Exp $ */ /* * Copyright (c) 1980, 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1980, 1992, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93"; #endif static char rcsid[] = "$OpenBSD: script.c,v 1.14 2001/01/11 19:26:01 deraadt Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include FILE *fscript; int master, slave; int child, subchild; int outcc; char *fname; struct termios tt; __dead void done __P((int)); void dooutput __P((void)); void doshell __P((void)); void fail __P((void)); void finish __P((int)); void scriptflush __P((int)); void handlesigwinch __P((int)); int main(argc, argv) int argc; char *argv[]; { register int cc; struct termios rtt; struct winsize win; int aflg, ch; char ibuf[BUFSIZ]; aflg = 0; while ((ch = getopt(argc, argv, "a")) != -1) switch(ch) { case 'a': aflg = 1; break; case '?': default: (void)fprintf(stderr, "usage: script [-a] [file]\n"); exit(1); } argc -= optind; argv += optind; if (argc > 0) fname = argv[0]; else fname = "typescript"; if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) err(1, "%s", fname); (void)tcgetattr(STDIN_FILENO, &tt); (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win); if (openpty(&master, &slave, NULL, &tt, &win) == -1) err(1, "openpty"); (void)printf("Script started, output file is %s\n", fname); rtt = tt; cfmakeraw(&rtt); rtt.c_lflag &= ~ECHO; (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); (void)signal(SIGWINCH, handlesigwinch); (void)signal(SIGCHLD, finish); child = fork(); if (child < 0) { perror("fork"); fail(); } if (child == 0) { subchild = child = fork(); if (child < 0) { perror("fork"); fail(); } if (child) dooutput(); else doshell(); } (void)fclose(fscript); while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) (void)write(master, ibuf, cc); done(0); } void finish(signo) int signo; { register int die, pid; int save_errno = errno; int status, e; die = e = 0; while ((pid = wait3(&status, WNOHANG, 0)) > 0) if (pid == child) { die = 1; if (WIFEXITED(status)) e = WEXITSTATUS(status); else e = 1; } if (die) done(e); errno = save_errno; } void handlesigwinch(signo) int signo; { struct winsize win; pid_t pgrp; int save_errno = errno; if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) != -1) { ioctl(slave, TIOCSWINSZ, &win); if (ioctl(slave, TIOCGPGRP, &pgrp) != -1) killpg(pgrp, SIGWINCH); } errno = save_errno; } void dooutput() { struct itimerval value; register int cc; time_t tvec; char obuf[BUFSIZ]; (void)close(STDIN_FILENO); tvec = time(NULL); (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); (void)signal(SIGALRM, scriptflush); value.it_interval.tv_sec = SECSPERMIN / 2; value.it_interval.tv_usec = 0; value.it_value = value.it_interval; (void)setitimer(ITIMER_REAL, &value, NULL); for (;;) { cc = read(master, obuf, sizeof (obuf)); if (cc <= 0) break; (void)write(1, obuf, cc); (void)fwrite(obuf, 1, cc, fscript); outcc += cc; } done(0); } /* XXX totally illegal race */ void scriptflush(signo) int signo; { int save_errno = errno; if (outcc) { (void)fflush(fscript); outcc = 0; } errno = save_errno; } void doshell() { char *shell; shell = getenv("SHELL"); if (shell == NULL) shell = _PATH_BSHELL; (void)close(master); (void)fclose(fscript); login_tty(slave); execl(shell, shell, "-i", NULL); perror(shell); fail(); } void fail() { (void)kill(0, SIGTERM); done(1); } void done(eval) int eval; { time_t tvec; if (subchild) { tvec = time(NULL); (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec)); (void)fclose(fscript); (void)close(master); } else { (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); (void)printf("Script done, output file is %s\n", fname); } exit(eval); }