busybox/coreutils/catv.c

/* vi: set sw=4 ts=4: */
/*
 * cat -v implementation for busybox
 *
 * Copyright (C) 2006 Rob Landley <rob@landley.net>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* See "Cat -v considered harmful" at
 * http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz */

#include "busybox.h"

int catv_main(int argc, char **argv)
{
	int retval = EXIT_SUCCESS, fd;
	unsigned flags;

	flags = getopt32(argc, argv, "etv");
#define CATV_OPT_e (1<<0)
#define CATV_OPT_t (1<<1)
#define CATV_OPT_v (1<<2)
	flags ^= CATV_OPT_v;

	argv += optind;
	do {
		/* Read from stdin if there's nothing else to do. */
		fd = 0;
		if (*argv && 0 > (fd = xopen(*argv, O_RDONLY)))
			retval = EXIT_FAILURE;
		else for (;;) {
			int i, res;

			res = read(fd, bb_common_bufsiz1, sizeof(bb_common_bufsiz1));
			if (res < 0)
				retval = EXIT_FAILURE;
			if (res < 1)
				break;
			for (i = 0; i < res; i++) {
				char c = bb_common_bufsiz1[i];

				if (c > 126 && (flags & CATV_OPT_v)) {
					if (c == 127) {
						printf("^?");
						continue;
					} else {
						printf("M-");
						c -= 128;
					}
				}
				if (c < 32) {
					if (c == 10) {
						if (flags & CATV_OPT_e)
							putchar('$');
					} else if (flags & (c==9 ? CATV_OPT_t : CATV_OPT_v)) {
						printf("^%c", c+'@');
						continue;
					}
				}
				putchar(c);
			}
		}
		if (ENABLE_FEATURE_CLEAN_UP && fd)
			close(fd);
	} while (*++argv);

	fflush_stdout_and_exit(retval);
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* cat -v implementation for busybox
4			*
5			* Copyright (C) 2006 Rob Landley <rob@landley.net>
6			*
7			* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8			*/
9
10			/* See "Cat -v considered harmful" at
11			* http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz */
12
13			#include "busybox.h"
14
15			int catv_main(int argc, char **argv)
16			{
17			int retval = EXIT_SUCCESS, fd;
18			unsigned flags;
19
20			flags = getopt32(argc, argv, "etv");
21			#define CATV_OPT_e (1<<0)
22			#define CATV_OPT_t (1<<1)
23			#define CATV_OPT_v (1<<2)
24			flags ^= CATV_OPT_v;
25
26			argv += optind;
27			do {
28			/* Read from stdin if there's nothing else to do. */
29			fd = 0;
30			if (argv && 0 > (fd = xopen(argv, O_RDONLY)))
31			retval = EXIT_FAILURE;
32			else for (;;) {
33			int i, res;
34
35			res = read(fd, bb_common_bufsiz1, sizeof(bb_common_bufsiz1));
36			if (res < 0)
37			retval = EXIT_FAILURE;
38			if (res < 1)
39			break;
40			for (i = 0; i < res; i++) {
41			char c = bb_common_bufsiz1[i];
42
43			if (c > 126 && (flags & CATV_OPT_v)) {
44			if (c == 127) {
45			printf("^?");
46			continue;
47			} else {
48			printf("M-");
49			c -= 128;
50			}
51			}
52			if (c < 32) {
53			if (c == 10) {
54			if (flags & CATV_OPT_e)
55			putchar('$');
56			} else if (flags & (c==9 ? CATV_OPT_t : CATV_OPT_v)) {
57			printf("^%c", c+'@');
58			continue;
59			}
60			}
61			putchar(c);
62			}
63			}
64			if (ENABLE_FEATURE_CLEAN_UP && fd)
65			close(fd);
66			} while (*++argv);
67
68			fflush_stdout_and_exit(retval);
69			}