183 lines
3.9 KiB
C
183 lines
3.9 KiB
C
/*
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* Copyright (C) 2008, Karel Zak <kzak@redhat.com>
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* Copyright (C) 2008, James Youngman <jay@gnu.org>
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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* Based on scriptreplay.pl by Joey Hess <joey@kitenet.net>
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <limits.h>
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#include <math.h>
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#include <sys/select.h>
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#include <unistd.h>
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#include <err.h>
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#include "nls.h"
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#define SCRIPT_MIN_DELAY 0.0001 /* from original sripreplay.pl */
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void __attribute__((__noreturn__))
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usage(int rc)
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{
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printf(_("%s <timingfile> [<typescript> [<divisor>]]\n"),
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program_invocation_short_name);
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exit(rc);
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}
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static double
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getnum(const char *s)
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{
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double d;
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char *end;
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errno = 0;
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d = strtod(s, &end);
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if (end && *end != '\0')
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errx(EXIT_FAILURE, _("expected a number, but got '%s'"), s);
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if ((d == HUGE_VAL || d == -HUGE_VAL) && ERANGE == errno)
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err(EXIT_FAILURE, _("divisor '%s'"), s);
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if (!(d==d)) { /* did they specify "nan"? */
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errno = EINVAL;
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err(EXIT_FAILURE, _("divisor '%s'"), s);
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}
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return d;
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}
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static void
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delay_for(double delay)
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{
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#ifdef HAVE_NANOSLEEP
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struct timespec ts, remainder;
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ts.tv_sec = (time_t) delay;
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ts.tv_nsec = (delay - ts.tv_sec) * 1.0e9;
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while (-1 == nanosleep(&ts, &remainder)) {
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if (EINTR == errno)
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ts = remainder;
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else
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break;
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}
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#else
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struct timeval tv;
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tv.tv_sec = (long) delay;
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tv.tv_usec = (delay - tv.tv_sec) * 1.0e6;
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select(0, NULL, NULL, NULL, &tv);
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#endif
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}
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static void
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emit(FILE *fd, const char *filename, size_t ct)
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{
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char buf[BUFSIZ];
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while(ct) {
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size_t len, cc;
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cc = ct > sizeof(buf) ? sizeof(buf) : ct;
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len = fread(buf, 1, cc, fd);
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if (!len)
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break;
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ct -= len;
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cc = write(STDOUT_FILENO, buf, len);
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if (cc != len)
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err(EXIT_FAILURE, _("write to stdout failed"));
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}
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if (!ct)
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return;
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if (feof(fd))
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errx(EXIT_FAILURE, _("unexpected end of file on %s"), filename);
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err(EXIT_FAILURE, _("failed to read typescript file %s"), filename);
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}
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int
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main(int argc, char *argv[])
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{
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FILE *tfile, *sfile;
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const char *sname, *tname;
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double divi;
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int c;
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unsigned long line;
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size_t oldblk = 0;
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/* Because we use space as a separator, we can't afford to use any
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* locale which tolerates a space in a number. In any case, script.c
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* sets the LC_NUMERIC locale to C, anyway.
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*/
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setlocale(LC_ALL, "");
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setlocale(LC_NUMERIC, "C");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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if (argc < 2 && argc > 4)
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usage(EXIT_FAILURE);
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tname = argv[1];
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sname = argc > 2 ? argv[2] : "typescript";
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divi = argc == 4 ? getnum(argv[3]) : 1;
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tfile = fopen(tname, "r");
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if (!tfile)
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err(EXIT_FAILURE, _("cannot open timing file %s"), tname);
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sfile = fopen(sname, "r");
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if (!sfile)
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err(EXIT_FAILURE, _("cannot open typescript file %s"), sname);
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/* ignore the first typescript line */
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while((c = fgetc(sfile)) != EOF && c != '\n');
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for(line = 0; ; line++) {
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double delay;
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size_t blk;
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char nl;
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if ((fscanf(tfile, "%lf %zd%[\n]\n", &delay, &blk, &nl) != 3) ||
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(nl != '\n')) {
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if (feof(tfile))
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break;
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if (ferror(tfile))
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err(EXIT_FAILURE,
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_("failed to read timing file %s"), tname);
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errx(EXIT_FAILURE,
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_("timings file %s: %lu: unexpected format"),
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tname, line);
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}
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delay /= divi;
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if (delay > SCRIPT_MIN_DELAY)
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delay_for(delay);
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if (oldblk)
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emit(sfile, sname, oldblk);
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oldblk = blk;
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}
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fclose(sfile);
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fclose(tfile);
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exit(EXIT_SUCCESS);
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}
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