source: branches/3.2/mindi-busybox/coreutils/basename.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 2.1 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini basename implementation for busybox
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9
10/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
11 *
12 * Changes:
13 * 1) Now checks for too many args.  Need at least one and at most two.
14 * 2) Don't check for options, as per SUSv3.
15 * 3) Save some space by using strcmp().  Calling strncmp() here was silly.
16 */
17
18/* BB_AUDIT SUSv3 compliant */
19/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
20
21//kbuild:lib-$(CONFIG_BASENAME) += basename.o
22
23//config:config BASENAME
24//config:   bool "basename"
25//config:   default y
26//config:   help
27//config:     basename is used to strip the directory and suffix from filenames,
28//config:     leaving just the filename itself. Enable this option if you wish
29//config:     to enable the 'basename' utility.
30
31//usage:#define basename_trivial_usage
32//usage:       "FILE [SUFFIX]"
33//usage:#define basename_full_usage "\n\n"
34//usage:       "Strip directory path and .SUFFIX from FILE\n"
35//usage:
36//usage:#define basename_example_usage
37//usage:       "$ basename /usr/local/bin/foo\n"
38//usage:       "foo\n"
39//usage:       "$ basename /usr/local/bin/\n"
40//usage:       "bin\n"
41//usage:       "$ basename /foo/bar.txt .txt\n"
42//usage:       "bar"
43
44#include "libbb.h"
45
46/* This is a NOFORK applet. Be very careful! */
47
48int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
49int basename_main(int argc, char **argv)
50{
51    size_t m, n;
52    char *s;
53
54    if (argv[1] && strcmp(argv[1], "--") == 0) {
55        argv++;
56        argc--;
57    }
58
59    if ((unsigned)(argc-2) >= 2) {
60        bb_show_usage();
61    }
62
63    /* It should strip slash: /abc/def/ -> def */
64    s = bb_get_last_path_component_strip(*++argv);
65
66    m = strlen(s);
67    if (*++argv) {
68        n = strlen(*argv);
69        if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
70            m -= n;
71            /*s[m] = '\0'; - redundant */
72        }
73    }
74
75    /* puts(s) will do, but we can do without stdio this way: */
76    s[m++] = '\n';
77    /* NB: != is correct here: */
78    return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
79}
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