8d5e4a1416
Close the file descriptor to the TTY. There is no reason why the parent process should keep track of the descriptor. This ensures that the application inside properly drains the TTY during exit(2). Reported by: alfred MFC after: 2 weeks
287 lines
6.3 KiB
C
287 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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else
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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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