Contents of /trunk/mkinitrd-magellan/busybox/coreutils/catv.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1450 byte(s)
Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1450 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 "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 | } |