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 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
10 *
11 * Changes:
12 * 1) Now checks for too many args. Need at least one and at most two.
13 * 2) Don't check for options, as per SUSv3.
14 * 3) Save some space by using strcmp(). Calling strncmp() here was silly.
15 */
16 //config:config BASENAME
17 //config: bool "basename (438 bytes)"
18 //config: default y
19 //config: help
20 //config: basename is used to strip the directory and suffix from filenames,
21 //config: leaving just the filename itself. Enable this option if you wish
22 //config: to enable the 'basename' utility.
23
24 //applet:IF_BASENAME(APPLET_NOFORK(basename, basename, BB_DIR_USR_BIN, BB_SUID_DROP, basename))
25
26 //kbuild:lib-$(CONFIG_BASENAME) += basename.o
27
28 /* BB_AUDIT SUSv3 compliant */
29 /* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
30
31 //usage:#define basename_trivial_usage
32 //usage: "FILE [SUFFIX] | -a FILE... | -s SUFFIX FILE..."
33 //usage:#define basename_full_usage "\n\n"
34 //usage: "Strip directory path and SUFFIX from FILE\n"
35 //usage: "\n -a All arguments are FILEs"
36 //usage: "\n -s SUFFIX Remove SUFFIX (implies -a)"
37 //usage:
38 //usage:#define basename_example_usage
39 //usage: "$ basename /usr/local/bin/foo\n"
40 //usage: "foo\n"
41 //usage: "$ basename /usr/local/bin/\n"
42 //usage: "bin\n"
43 //usage: "$ basename /foo/bar.txt .txt\n"
44 //usage: "bar"
45
46 #include "libbb.h"
47
48 /* This is a NOFORK applet. Be very careful! */
49
50 int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
basename_main(int argc UNUSED_PARAM,char ** argv)51 int basename_main(int argc UNUSED_PARAM, char **argv)
52 {
53 unsigned opts;
54 const char *suffix = NULL;
55
56 /* '+': stop at first non-option */
57 opts = getopt32(argv, "^+" "as:"
58 "\0" "-1" /* At least one argument */
59 , &suffix
60 );
61 argv += optind;
62
63 do {
64 char *s;
65 size_t m;
66
67 /* It should strip slash: /abc/def/ -> def */
68 s = bb_get_last_path_component_strip(*argv++);
69 m = strlen(s);
70 if (!opts) {
71 if (*argv) {
72 suffix = *argv;
73 if (argv[1])
74 bb_show_usage();
75 }
76 }
77 if (suffix) {
78 size_t n = strlen(suffix);
79 if ((m > n) && (strcmp(s + m - n, suffix) == 0)) {
80 m -= n;
81 /*s[m] = '\0'; - redundant */
82 }
83 }
84 /* puts(s) will do, but we can do without stdio this way: */
85 s[m++] = '\n';
86 /* NB: != is correct here: */
87 if (full_write(STDOUT_FILENO, s, m) != (ssize_t)m)
88 return EXIT_FAILURE;
89 } while (opts && *argv);
90
91 return EXIT_SUCCESS;
92 }
93