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286 lines
6.3 KiB
C
286 lines
6.3 KiB
C
/*
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* Copyright (c) 1980, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93";
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#endif
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libutil.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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FILE *fscript;
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int master, slave;
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int child;
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const char *fname;
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int qflg, ttyflg;
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struct termios tt;
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void done(int) __dead2;
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void dooutput(void);
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void doshell(char **);
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void fail(void);
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void finish(void);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int cc;
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struct termios rtt, stt;
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struct winsize win;
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int aflg, kflg, ch, n;
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struct timeval tv, *tvp;
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time_t tvec, start;
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char obuf[BUFSIZ];
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char ibuf[BUFSIZ];
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fd_set rfd;
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int flushtime = 30;
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aflg = kflg = 0;
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while ((ch = getopt(argc, argv, "aqkt:")) != -1)
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switch(ch) {
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case 'a':
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aflg = 1;
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break;
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case 'q':
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qflg = 1;
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break;
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case 'k':
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kflg = 1;
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break;
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case 't':
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flushtime = atoi(optarg);
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if (flushtime < 0)
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err(1, "invalid flush time %d", flushtime);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc > 0) {
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fname = argv[0];
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argv++;
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argc--;
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} else
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fname = "typescript";
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if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL)
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err(1, "%s", fname);
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if ((ttyflg = isatty(STDIN_FILENO)) != 0) {
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if (tcgetattr(STDIN_FILENO, &tt) == -1)
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err(1, "tcgetattr");
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1)
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err(1, "ioctl");
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if (openpty(&master, &slave, NULL, &tt, &win) == -1)
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err(1, "openpty");
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} else {
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if (openpty(&master, &slave, NULL, NULL, NULL) == -1)
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err(1, "openpty");
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}
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if (!qflg) {
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tvec = time(NULL);
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(void)printf("Script started, output file is %s\n", fname);
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(void)fprintf(fscript, "Script started on %s", ctime(&tvec));
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fflush(fscript);
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}
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if (ttyflg) {
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rtt = tt;
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cfmakeraw(&rtt);
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rtt.c_lflag &= ~ECHO;
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(void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
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}
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child = fork();
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if (child < 0) {
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warn("fork");
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done(1);
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}
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if (child == 0)
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doshell(argv);
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close(slave);
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if (flushtime > 0)
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tvp = &tv;
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else
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tvp = NULL;
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start = time(0);
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FD_ZERO(&rfd);
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for (;;) {
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FD_SET(master, &rfd);
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FD_SET(STDIN_FILENO, &rfd);
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if (flushtime > 0) {
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tv.tv_sec = flushtime;
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tv.tv_usec = 0;
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}
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n = select(master + 1, &rfd, 0, 0, tvp);
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if (n < 0 && errno != EINTR)
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break;
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if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) {
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cc = read(STDIN_FILENO, ibuf, BUFSIZ);
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if (cc < 0)
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break;
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if (cc == 0)
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(void)write(master, ibuf, 0);
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if (cc > 0) {
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(void)write(master, ibuf, cc);
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if (kflg && tcgetattr(master, &stt) >= 0 &&
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((stt.c_lflag & ECHO) == 0)) {
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(void)fwrite(ibuf, 1, cc, fscript);
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}
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}
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}
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if (n > 0 && FD_ISSET(master, &rfd)) {
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cc = read(master, obuf, sizeof (obuf));
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if (cc <= 0)
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break;
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(void)write(STDOUT_FILENO, obuf, cc);
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(void)fwrite(obuf, 1, cc, fscript);
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}
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tvec = time(0);
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if (tvec - start >= flushtime) {
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fflush(fscript);
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start = tvec;
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}
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}
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finish();
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done(0);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: script [-akq] [-t time] [file [command ...]]\n");
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exit(1);
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}
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void
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finish(void)
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{
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pid_t pid;
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int die, e, status;
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die = e = 0;
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while ((pid = wait3(&status, WNOHANG, 0)) > 0)
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if (pid == child) {
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die = 1;
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if (WIFEXITED(status))
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e = WEXITSTATUS(status);
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else if (WIFSIGNALED(status))
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e = WTERMSIG(status);
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else /* can't happen */
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e = 1;
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}
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if (die)
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done(e);
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}
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void
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doshell(char **av)
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{
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const char *shell;
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shell = getenv("SHELL");
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if (shell == NULL)
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shell = _PATH_BSHELL;
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(void)close(master);
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(void)fclose(fscript);
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login_tty(slave);
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if (av[0]) {
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execvp(av[0], av);
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warn("%s", av[0]);
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} else {
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execl(shell, shell, "-i", (char *)NULL);
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warn("%s", shell);
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}
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fail();
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}
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void
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fail(void)
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{
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(void)kill(0, SIGTERM);
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done(1);
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}
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void
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done(int eno)
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{
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time_t tvec;
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if (ttyflg)
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(void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
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tvec = time(NULL);
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if (!qflg) {
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(void)fprintf(fscript,"\nScript done on %s", ctime(&tvec));
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(void)printf("\nScript done, output file is %s\n", fname);
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}
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(void)fclose(fscript);
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(void)close(master);
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exit(eno);
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}
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