406 lines
8.6 KiB
C
406 lines
8.6 KiB
C
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/*
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* Copyright (c) 2000 Satoru Takabayashi <satoru@namazu.org>
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* 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 <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <unistd.h>
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#include <termios.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <curses.h>
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#include "ttyrec.h"
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#include "io.h"
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#include "stripgfx.h"
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extern int caught_sighup;
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off_t seek_offset_clrscr;
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int bstripgfx;
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typedef double (*WaitFunc) (struct timeval prev,
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struct timeval cur, double speed);
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typedef int (*ReadFunc) (FILE * fp, Header * h, char **buf, int pread);
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typedef void (*WriteFunc) (char *buf, int len);
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typedef void (*ProcessFunc) (FILE * fp, double speed,
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ReadFunc read_func, WaitFunc wait_func);
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struct timeval
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timeval_diff (struct timeval tv1, struct timeval tv2)
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{
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struct timeval diff;
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diff.tv_sec = tv2.tv_sec - tv1.tv_sec;
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diff.tv_usec = tv2.tv_usec - tv1.tv_usec;
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if (diff.tv_usec < 0)
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{
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diff.tv_sec--;
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diff.tv_usec += 1000000;
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}
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return diff;
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}
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struct timeval
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timeval_div (struct timeval tv1, double n)
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{
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double x = ((double) tv1.tv_sec + (double) tv1.tv_usec / 1000000.0) / n;
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struct timeval div;
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div.tv_sec = (int) x;
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div.tv_usec = (x - (int) x) * 1000000;
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return div;
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}
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double
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ttywait (struct timeval prev, struct timeval cur, double speed)
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{
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struct timeval diff = timeval_diff (prev, cur);
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fd_set readfs;
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assert (speed != 0);
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diff = timeval_div (diff, speed);
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FD_SET (STDIN_FILENO, &readfs);
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select (1, &readfs, NULL, NULL, &diff); /* skip if a user hits any key */
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if (FD_ISSET (0, &readfs))
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{ /* a user hits a character? */
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char c;
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read (STDIN_FILENO, &c, 1); /* drain the character */
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switch (c)
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{
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case '+':
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case 'f':
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speed *= 2;
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break;
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case '-':
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case 's':
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speed /= 2;
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break;
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case '1':
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speed = 1.0;
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break;
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}
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}
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return speed;
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}
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double
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ttynowait (struct timeval prev, struct timeval cur, double speed)
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{
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return 0; /* Speed isn't important. */
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}
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int
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ttyread (FILE * fp, Header * h, char **buf, int pread)
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{
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long offset;
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/* do this BEFORE header read, hlen bug */
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offset = ftell (fp);
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if (read_header (fp, h) == 0)
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{
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return 0;
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}
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/* length should never be longer than one BUFSIZ */
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if (h->len > BUFSIZ)
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{
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perror ("hlen");
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exit (1);
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}
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*buf = malloc (h->len);
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if (*buf == NULL)
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{
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perror ("malloc");
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exit (1);
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}
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if (fread (*buf, 1, h->len, fp) != h->len)
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{
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fseek (fp, offset, SEEK_SET);
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return 0;
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}
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return 1;
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}
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int
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ttypread (FILE * fp, Header * h, char **buf, int pread)
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{
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int counter = 0;
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fd_set readfs;
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struct timeval zerotime;
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zerotime.tv_sec = 0;
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zerotime.tv_usec = 0;
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/*
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* Read persistently just like tail -f.
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*/
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while (ttyread (fp, h, buf, 1) == 0)
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{
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struct timeval w = { 0, 100000 };
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select (0, NULL, NULL, NULL, &w);
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clearerr (fp);
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if (counter++ > (20 * 60 * 10))
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{
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endwin ();
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printf ("Exiting due to 20 minutes of inactivity.\n");
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exit (2);
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return 0;
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}
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/* look for keypresses here. as good a place as any */
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FD_SET (STDIN_FILENO, &readfs);
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select (1, &readfs, NULL, NULL, &zerotime);
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if (FD_ISSET (0, &readfs))
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{ /* a user hits a character? */
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char c;
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read (STDIN_FILENO, &c, 1); /* drain the character */
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switch (c)
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{
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case 'q':
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return 0;
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break;
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}
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}
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}
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return 1;
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}
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void
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ttywrite (char *buf, int len)
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{
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int i;
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if (bstripgfx)
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{
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for (i = 0; i < len; i++)
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{
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buf[i] = strip_gfx (buf[i]);
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}
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}
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fwrite (buf, 1, len, stdout);
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}
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void
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ttynowrite (char *buf, int len)
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{
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/* do nothing */
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}
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void
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ttyplay (FILE * fp, double speed, ReadFunc read_func,
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WriteFunc write_func, WaitFunc wait_func, off_t offset)
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{
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int first_time = 1;
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struct timeval prev;
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setbuf (stdout, NULL);
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setbuf (fp, NULL);
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/* for dtype's attempt to get the last clrscr and playback from there */
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if (offset)
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{
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lseek (fileno (fp), offset, SEEK_SET);
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}
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while (1)
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{
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char *buf;
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Header h;
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if (read_func (fp, &h, &buf, 0) == 0)
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{
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break;
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}
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if (!first_time)
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{
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speed = wait_func (prev, h.tv, speed);
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}
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first_time = 0;
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write_func (buf, h.len);
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prev = h.tv;
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free (buf);
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}
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}
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void
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set_seek_offset_clrscr (FILE * fp)
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{
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off_t raw_seek_offset = 0;
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char *buf;
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struct stat mystat;
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int state = 0;
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int i;
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int bytesread;
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lseek (fileno (fp), 0, SEEK_SET);
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fstat (fileno (fp), &mystat);
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buf = malloc (mystat.st_size);
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bytesread = read (fileno (fp), buf, mystat.st_size);
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/* one byte at at time sucks, but is a simple hack for the temp
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* being to avoid looking for wraparounds */
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for (i = 0; i < bytesread; i++)
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{
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if (buf[i] == 0x1b)
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{
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state = 1;
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}
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else if ((buf[i] == 0x5b) && (state == 1))
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{
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state = 2;
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}
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else if ((buf[i] == 0x32) && (state == 2))
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{
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state = 3;
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}
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else if ((buf[i] == 0x4a) && ((state == 2) || (state == 3)))
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{
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state = 4;
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}
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else
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{
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state = 0;
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}
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if (state == 4)
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{
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raw_seek_offset = i - 2;
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}
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}
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free (buf);
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/* now find last filepos that is less than seek offset */
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lseek (fileno (fp), 0, SEEK_SET);
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while (1)
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{
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char *buf;
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Header h;
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if (ttyread (fp, &h, &buf, 0) == 0)
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{
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break;
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}
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if (lseek (fileno (fp), 0, SEEK_CUR) < raw_seek_offset)
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{
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seek_offset_clrscr = lseek (fileno (fp), 0, SEEK_CUR);
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}
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free (buf);
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}
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}
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void
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ttyskipall (FILE * fp)
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{
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/*
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* Skip all records.
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*/
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ttyplay (fp, 0, ttyread, ttynowrite, ttynowait, 0);
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}
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void
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ttyplayback (FILE * fp, double speed, ReadFunc read_func, WaitFunc wait_func)
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{
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ttyplay (fp, speed, ttyread, ttywrite, wait_func, 0);
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}
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void
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ttypeek (FILE * fp, double speed, ReadFunc read_func, WaitFunc wait_func)
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{
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ttyskipall (fp);
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set_seek_offset_clrscr (fp);
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if (seek_offset_clrscr)
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{
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ttyplay (fp, 0, ttyread, ttywrite, ttynowait, seek_offset_clrscr);
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}
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ttyplay (fp, speed, ttypread, ttywrite, ttynowait, 0);
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}
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void
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usage (void)
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{
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printf ("Usage: ttyplay [OPTION] [FILE]\n");
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printf (" -s SPEED Set speed to SPEED [1.0]\n");
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printf (" -n No wait mode\n");
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printf (" -p Peek another person's ttyrecord\n");
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exit (EXIT_FAILURE);
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}
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int
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ttyplay_main (char *ttyfile, int mode, int rstripgfx)
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{
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double speed = 1.0;
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ReadFunc read_func = ttyread;
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WaitFunc wait_func = ttywait;
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ProcessFunc process = ttyplayback;
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FILE *input = stdin;
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struct termios old, new;
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/* strip graphics mode flag */
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bstripgfx = rstripgfx;
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if (bstripgfx)
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populate_gfx_array (DEC_GRAPHICS);
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seek_offset_clrscr = 0;
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if (mode == 1)
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process = ttypeek;
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input = efopen (ttyfile, "r");
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tcgetattr (0, &old); /* Get current terminal state */
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new = old; /* Make a copy */
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new.c_lflag &= ~(ICANON | ECHO | ECHONL); /* unbuffered, no echo */
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tcsetattr (0, TCSANOW, &new); /* Make it current */
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process (input, speed, read_func, wait_func);
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tcsetattr (0, TCSANOW, &old); /* Return terminal state */
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return 0;
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}
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