Contents of /trunk/mkinitrd-magellan/busybox/coreutils/catv.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
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File size: 1567 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
File MIME type: text/plain
File size: 1567 byte(s)
-updated to busybox-1.13.4
1 | /* 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 "libbb.h" |
14 | |
15 | int catv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
16 | int catv_main(int argc UNUSED_PARAM, char **argv) |
17 | { |
18 | int retval = EXIT_SUCCESS; |
19 | int fd; |
20 | unsigned flags; |
21 | |
22 | flags = getopt32(argv, "etv"); |
23 | #define CATV_OPT_e (1<<0) |
24 | #define CATV_OPT_t (1<<1) |
25 | #define CATV_OPT_v (1<<2) |
26 | flags ^= CATV_OPT_v; |
27 | argv += optind; |
28 | |
29 | /* Read from stdin if there's nothing else to do. */ |
30 | if (!argv[0]) |
31 | *--argv = (char*)"-"; |
32 | do { |
33 | fd = open_or_warn_stdin(*argv); |
34 | if (fd < 0) { |
35 | retval = EXIT_FAILURE; |
36 | continue; |
37 | } |
38 | for (;;) { |
39 | int i, res; |
40 | |
41 | #define read_buf bb_common_bufsiz1 |
42 | res = read(fd, read_buf, COMMON_BUFSIZE); |
43 | if (res < 0) |
44 | retval = EXIT_FAILURE; |
45 | if (res < 1) |
46 | break; |
47 | for (i = 0; i < res; i++) { |
48 | unsigned char c = read_buf[i]; |
49 | |
50 | if (c > 126 && (flags & CATV_OPT_v)) { |
51 | if (c == 127) { |
52 | printf("^?"); |
53 | continue; |
54 | } |
55 | printf("M-"); |
56 | c -= 128; |
57 | } |
58 | if (c < 32) { |
59 | if (c == 10) { |
60 | if (flags & CATV_OPT_e) |
61 | bb_putchar('$'); |
62 | } else if (flags & (c==9 ? CATV_OPT_t : CATV_OPT_v)) { |
63 | printf("^%c", c+'@'); |
64 | continue; |
65 | } |
66 | } |
67 | bb_putchar(c); |
68 | } |
69 | } |
70 | if (ENABLE_FEATURE_CLEAN_UP && fd) |
71 | close(fd); |
72 | } while (*++argv); |
73 | |
74 | fflush_stdout_and_exit(retval); |
75 | } |