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/*
* Copyright (C) 2008, Karel Zak <kzak@redhat.com>
* Copyright (C) 2008, James Youngman <jay@gnu.org>
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* Based on scriptreplay.pl by Joey Hess <joey@kitenet.net>
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <limits.h>
#include <math.h>
#include <sys/select.h>
#include <unistd.h>
#include <getopt.h>
#include "closestream.h"
#include "nls.h"
#include "strutils.h"
#include "c.h"
#define SCRIPT_MIN_DELAY 0.0001 /* from original sripreplay.pl */
static void __attribute__((__noreturn__))
usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %s [-t] timingfile [typescript] [divisor]\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Play back terminal typescripts, using timing information.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -t, --timing <file> script timing output file\n"
" -s, --typescript <file> script terminal session output file\n"
" -d, --divisor <num> speed up or slow down execution with time divisor\n"
" -m, --maxdelay <num> wait at most this many seconds between updates\n"
), out);
printf(USAGE_HELP_OPTIONS(25));
printf(USAGE_MAN_TAIL("scriptreplay(1)"));
exit(EXIT_SUCCESS);
}
static double
getnum(const char *s)
{
const double d = strtod_or_err(s, _("failed to parse number"));
if (isnan(d)) {
errno = EINVAL;
err(EXIT_FAILURE, "%s: %s", _("failed to parse number"), s);
}
return d;
}
static void
delay_for(double delay)
{
#ifdef HAVE_NANOSLEEP
struct timespec ts, remainder;
ts.tv_sec = (time_t) delay;
ts.tv_nsec = (delay - ts.tv_sec) * 1.0e9;
while (-1 == nanosleep(&ts, &remainder)) {
if (EINTR == errno)
ts = remainder;
else
break;
}
#else
struct timeval tv;
tv.tv_sec = (long) delay;
tv.tv_usec = (delay - tv.tv_sec) * 1.0e6;
select(0, NULL, NULL, NULL, &tv);
#endif
}
static void
emit(FILE *fd, const char *filename, size_t ct)
{
char buf[BUFSIZ];
while(ct) {
size_t len, cc;
cc = ct > sizeof(buf) ? sizeof(buf) : ct;
len = fread(buf, 1, cc, fd);
if (!len)
break;
ct -= len;
cc = write(STDOUT_FILENO, buf, len);
if (cc != len)
err(EXIT_FAILURE, _("write to stdout failed"));
}
if (!ct)
return;
if (feof(fd))
errx(EXIT_FAILURE, _("unexpected end of file on %s"), filename);
err(EXIT_FAILURE, _("failed to read typescript file %s"), filename);
}
int
main(int argc, char *argv[])
{
FILE *tfile, *sfile;
const char *sname = NULL, *tname = NULL;
double divi = 1, maxdelay = 0;
int c, diviopt = FALSE, maxdelayopt = FALSE, idx;
unsigned long line;
int ch;
static const struct option longopts[] = {
{ "timing", required_argument, 0, 't' },
{ "typescript", required_argument, 0, 's' },
{ "divisor", required_argument, 0, 'd' },
{ "maxdelay", required_argument, 0, 'm' },
{ "version", no_argument, 0, 'V' },
{ "help", no_argument, 0, 'h' },
{ NULL, 0, 0, 0 }
};
/* Because we use space as a separator, we can't afford to use any
* locale which tolerates a space in a number. In any case, script.c
* sets the LC_NUMERIC locale to C, anyway.
*/
setlocale(LC_ALL, "");
setlocale(LC_NUMERIC, "C");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((ch = getopt_long(argc, argv, "t:s:d:m:Vh", longopts, NULL)) != -1)
switch(ch) {
case 't':
tname = optarg;
break;
case 's':
sname = optarg;
break;
case 'd':
diviopt = TRUE;
divi = getnum(optarg);
break;
case 'm':
maxdelayopt = TRUE;
maxdelay = getnum(optarg);
break;
case 'V':
printf(UTIL_LINUX_VERSION);
exit(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
argc -= optind;
argv += optind;
idx = 0;
if ((argc < 1 && !tname) || argc > 3) {
warnx(_("wrong number of arguments"));
errtryhelp(EXIT_FAILURE);
}
if (!tname)
tname = argv[idx++];
if (!sname)
sname = idx < argc ? argv[idx++] : "typescript";
if (!diviopt)
divi = idx < argc ? getnum(argv[idx]) : 1;
if (maxdelay < 0)
maxdelay = 0;
tfile = fopen(tname, "r");
if (!tfile)
err(EXIT_FAILURE, _("cannot open %s"), tname);
sfile = fopen(sname, "r");
if (!sfile)
err(EXIT_FAILURE, _("cannot open %s"), sname);
/* ignore the first typescript line */
while((c = fgetc(sfile)) != EOF && c != '\n');
for(line = 1; ; line++) {
double delay;
size_t blk;
char nl;
if (fscanf(tfile, "%lf %zu%c\n", &delay, &blk, &nl) != 3 ||
nl != '\n') {
if (feof(tfile))
break;
if (ferror(tfile))
err(EXIT_FAILURE,
_("failed to read timing file %s"), tname);
errx(EXIT_FAILURE,
_("timing file %s: line %lu: unexpected format"),
tname, line);
}
delay /= divi;
if (maxdelayopt && delay > maxdelay)
delay = maxdelay;
if (delay > SCRIPT_MIN_DELAY)
delay_for(delay);
emit(sfile, sname, blk);
}
fclose(sfile);
fclose(tfile);
printf("\n");
exit(EXIT_SUCCESS);
}
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