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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 <err.h>
#include "nls.h"
#define SCRIPT_MIN_DELAY 0.0001 /* from original sripreplay.pl */
void __attribute__((__noreturn__))
usage(int rc)
{
printf(_("%s <timingfile> [<typescript> [<divisor>]]\n"),
program_invocation_short_name);
exit(rc);
}
static double
getnum(const char *s)
{
double d;
char *end;
errno = 0;
d = strtod(s, &end);
if (end && *end != '\0')
errx(EXIT_FAILURE, _("expected a number, but got '%s'"), s);
if ((d == HUGE_VAL || d == -HUGE_VAL) && ERANGE == errno)
err(EXIT_FAILURE, _("divisor '%s'"), s);
if (!(d==d)) { /* did they specify "nan"? */
errno = EINVAL;
err(EXIT_FAILURE, _("divisor '%s'"), 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, *tname;
double divi;
int c;
unsigned long line;
size_t oldblk = 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);
if (argc < 2 && argc > 4)
usage(EXIT_FAILURE);
tname = argv[1];
sname = argc > 2 ? argv[2] : "typescript";
divi = argc == 4 ? getnum(argv[3]) : 1;
tfile = fopen(tname, "r");
if (!tfile)
err(EXIT_FAILURE, _("cannot open timing file %s"), tname);
sfile = fopen(sname, "r");
if (!sfile)
err(EXIT_FAILURE, _("cannot open typescript file %s"), sname);
/* ignore the first typescript line */
while((c = fgetc(sfile)) != EOF && c != '\n');
for(line = 0; ; line++) {
double delay;
size_t blk;
char nl;
if ((fscanf(tfile, "%lf %zd%[\n]\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,
_("timings file %s: %lu: unexpected format"),
tname, line);
}
delay /= divi;
if (delay > SCRIPT_MIN_DELAY)
delay_for(delay);
if (oldblk)
emit(sfile, sname, oldblk);
oldblk = blk;
}
fclose(sfile);
fclose(tfile);
exit(EXIT_SUCCESS);
}
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