/*
 * Copyright (c) 1991, 1994, 1995, 1996, 1998
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static const char copyright[] =
    "@(#) Copyright (c) 1991, 1994, 1995, 1996, 1998\n\
The Regents of the University of California.  All rights reserved.\n";
static const char rcsid[] =
    "@(#) $Header: cf.c,v 1.12 99/09/17 16:25:35 leres Exp $ (LBL)";
#endif

#include <sys/types.h>

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

static char *argv0;

extern char *optarg;
extern int optind, opterr;

int lflag = 0;
int strict = 0;

/* Forwards */
int main(int, char **);
void doone(FILE *, FILE *);

int
main(argc, argv)
	int argc;
	char **argv;
{
	register char *cp;
	register int status, didany, op;
	FILE *f;
	int targc;
	char **targv;

        if ((cp = strrchr(argv[0], '/')) == NULL)
                argv0 = cp + 1;
        else
                argv0 = argv[0];

	opterr = 0;
	while ((op = getopt(argc, argv, "ls")) != EOF)
		switch (op) {

		case 'l':
			++lflag;
			break;

		case 's':
			++strict;
			break;

		default:
			(void)fprintf(stderr, "usage: %s [-ls] [file ...]\n",
			    argv0);
			exit(1);
			/* NOTREACHED */
		}
	targc = argc - optind;
	targv = &argv[optind];

	status = 0;
	didany = 0;
	while (targc > 0) {
		f = fopen(*targv, "r");
		if (f) {
			doone(f, stdout);
			(void) fclose(f);
		} else {
			(void) fprintf(stderr, "%s: fopen: ", argv0);
			perror(*targv);
			status |= 1;
		}
		--targc;
		++targv;
		++didany;
	}
	if (!didany)
		doone(stdin, stdout);
	exit(status);
}

void
doone(fin, fout)
	FILE *fin, *fout;
{
	time_t t;
	register char *bp, *cp;
	register int dot_count;
	char buf[1024];

	while (fgets(buf, sizeof(buf), fin)) {
		bp = buf;
		if (isdigit(*bp)) {
			t = atol(bp);
			++bp;
			dot_count = 0;
			while (isdigit(*bp) || *bp == '.') {
				if (*bp == '.')
					++dot_count;
				++bp;
			}
			if (strict && (bp - buf < 9 || dot_count > 1 ||
			    (bp - buf > 10 && dot_count != 1))) {
				/* Doesn't look like a genuine timestamp -
				 * skip it.
				 */
				fputs(buf, fout);
				continue;
			}
			cp = ctime(&t);
			/* XXX crude! */
			if (lflag)
				cp[24] = '\0';
			else
				cp[19] = '\0';
			if (lflag <= 1)
				cp += 4;
			fputs(cp, fout);
		}
		fputs(bp, fout);
	}
}