8f6bada139
data interleaved between chunks of actual output (and input), and teach script how to read the new format so that sessions can be played back at "proper" time.
372 lines
8.0 KiB
C
372 lines
8.0 KiB
C
/* $NetBSD: script.c,v 1.8 2002/06/21 18:46:31 atatat Exp $ */
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/*
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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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#ifndef lint
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__COPYRIGHT("@(#) 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 /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: script.c,v 1.8 2002/06/21 18:46:31 atatat Exp $");
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#endif /* not lint */
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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 <sys/uio.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 <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 <time.h>
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#include <tzfile.h>
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#include <unistd.h>
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#include <util.h>
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struct stamp {
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uint64_t scr_len; /* amount of data */
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uint64_t scr_sec; /* time it arrived in seconds... */
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uint32_t scr_usec; /* ...and microseconds */
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uint32_t scr_direction; /* 'i', 'o', etc (also indicates endianness) */
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};
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FILE *fscript;
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int master, slave;
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int child, subchild;
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int outcc;
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int usesleep, rawout;
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char *fname;
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struct termios tt;
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void done __P((void));
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void dooutput __P((void));
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void doshell __P((void));
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void fail __P((void));
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void finish __P((int));
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int main __P((int, char **));
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void scriptflush __P((int));
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void record __P((FILE *, char *, size_t, int));
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void playback __P((FILE *));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int cc;
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struct termios rtt;
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struct winsize win;
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int aflg, pflg, ch;
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char ibuf[BUFSIZ];
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aflg = 0;
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pflg = 0;
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usesleep = 1;
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rawout = 0;
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while ((ch = getopt(argc, argv, "adpr")) != -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 'd':
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usesleep = 0;
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break;
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case 'p':
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pflg = 1;
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break;
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case 'r':
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rawout = 1;
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break;
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case '?':
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default:
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(void)fprintf(stderr, "usage: script [-apr] [file]\n");
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exit(1);
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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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else
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fname = "typescript";
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if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL)
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err(1, "fopen %s", fname);
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if (pflg)
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playback(fscript);
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(void)tcgetattr(STDIN_FILENO, &tt);
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(void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win);
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if (openpty(&master, &slave, NULL, &tt, &win) == -1)
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err(1, "openpty");
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(void)printf("Script started, output file is %s\n", fname);
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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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(void)signal(SIGCHLD, finish);
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child = fork();
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if (child < 0) {
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warn("fork");
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fail();
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}
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if (child == 0) {
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subchild = child = fork();
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if (child < 0) {
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warn("fork");
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fail();
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}
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if (child)
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dooutput();
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else
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doshell();
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}
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if (!rawout)
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(void)fclose(fscript);
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while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) {
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if (rawout)
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record(fscript, ibuf, cc, 'i');
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(void)write(master, ibuf, cc);
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}
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done();
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/* NOTREACHED */
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return (0);
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}
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void
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finish(signo)
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int signo;
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{
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int die, pid, status;
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die = 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 (die)
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done();
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}
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void
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dooutput()
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{
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struct itimerval value;
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int cc;
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time_t tvec;
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char obuf[BUFSIZ];
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(void)close(STDIN_FILENO);
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tvec = time(NULL);
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if (rawout)
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record(fscript, NULL, 0, 's');
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else
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(void)fprintf(fscript, "Script started on %s", ctime(&tvec));
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(void)signal(SIGALRM, scriptflush);
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value.it_interval.tv_sec = SECSPERMIN / 2;
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value.it_interval.tv_usec = 0;
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value.it_value = value.it_interval;
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(void)setitimer(ITIMER_REAL, &value, NULL);
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for (;;) {
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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(1, obuf, cc);
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if (rawout)
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record(fscript, obuf, cc, 'o');
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else
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(void)fwrite(obuf, 1, cc, fscript);
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outcc += cc;
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}
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done();
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}
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void
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scriptflush(signo)
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int signo;
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{
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if (outcc) {
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(void)fflush(fscript);
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outcc = 0;
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}
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}
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void
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doshell()
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{
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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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execl(shell, shell, "-i", NULL);
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warn("execl %s", shell);
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fail();
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}
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void
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fail()
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{
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(void)kill(0, SIGTERM);
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done();
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}
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void
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done()
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{
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time_t tvec;
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if (subchild) {
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tvec = time(NULL);
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if (rawout)
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record(fscript, NULL, 0, 'e');
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else
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(void)fprintf(fscript,"\nScript done on %s",
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ctime(&tvec));
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(void)fclose(fscript);
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(void)close(master);
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} else {
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(void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
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(void)printf("Script done, output file is %s\n", fname);
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}
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exit(0);
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}
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void
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record(fscript, buf, cc, direction)
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FILE *fscript;
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char *buf;
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size_t cc;
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int direction;
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{
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struct iovec iov[2];
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struct stamp stamp;
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struct timeval tv;
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(void)gettimeofday(&tv, NULL);
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stamp.scr_len = cc;
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stamp.scr_sec = tv.tv_sec;
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stamp.scr_usec = tv.tv_usec;
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stamp.scr_direction = direction;
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iov[0].iov_len = sizeof(stamp);
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iov[0].iov_base = &stamp;
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iov[1].iov_len = cc;
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iov[1].iov_base = buf;
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if (writev(fileno(fscript), &iov[0], 2) == -1)
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err(1, "writev");
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}
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#define swapstamp(stamp) do { \
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if (stamp.scr_direction > 0xff) { \
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stamp.scr_len = bswap64(stamp.scr_len); \
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stamp.scr_sec = bswap64(stamp.scr_sec); \
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stamp.scr_usec = bswap32(stamp.scr_usec); \
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stamp.scr_direction = bswap32(stamp.scr_direction); \
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} \
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} while (0/*CONSTCOND*/)
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void
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playback(fscript)
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FILE *fscript;
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{
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struct timespec tsi, tso;
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struct stamp stamp;
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char buf[BUFSIZ];
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size_t l;
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time_t clock;
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do {
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if (fread(&stamp, sizeof(stamp), 1, fscript) != 1)
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err(1, "reading playback header");
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swapstamp(stamp);
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l = fread(buf, 1, stamp.scr_len, fscript);
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clock = stamp.scr_sec;
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tso.tv_sec = stamp.scr_sec;
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tso.tv_nsec = stamp.scr_usec * 1000;
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switch (stamp.scr_direction) {
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case 's':
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(void)printf("Script started on %s", ctime(&clock));
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tsi = tso;
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break;
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case 'e':
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(void)printf("\nScript done on %s", ctime(&clock));
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break;
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case 'i':
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/* throw input away */
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break;
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case 'o':
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tsi.tv_sec = tso.tv_sec - tsi.tv_sec;
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tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec;
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if (tsi.tv_nsec < 0) {
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tsi.tv_sec -= 1;
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tsi.tv_nsec += 1000000000;
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}
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if (usesleep)
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(void)nanosleep(&tsi, NULL);
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tsi = tso;
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(void)write(STDOUT_FILENO, buf, l);
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break;
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}
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} while (stamp.scr_direction != 'e');
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(void)fclose(fscript);
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exit(0);
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}
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