[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini basename implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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[2725] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 8 | */
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| 9 |
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| 10 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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| 11 | *
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| 12 | * Changes:
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| 13 | * 1) Now checks for too many args. Need at least one and at most two.
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| 14 | * 2) Don't check for options, as per SUSv3.
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| 15 | * 3) Save some space by using strcmp(). Calling strncmp() here was silly.
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| 16 | */
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| 17 |
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[2725] | 18 | /* BB_AUDIT SUSv3 compliant */
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| 19 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
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| 20 |
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| 21 | //kbuild:lib-$(CONFIG_BASENAME) += basename.o
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| 22 |
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| 23 | //config:config BASENAME
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| 24 | //config: bool "basename"
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| 25 | //config: default y
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| 26 | //config: help
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| 27 | //config: basename is used to strip the directory and suffix from filenames,
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| 28 | //config: leaving just the filename itself. Enable this option if you wish
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| 29 | //config: to enable the 'basename' utility.
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| 30 |
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[3232] | 31 | //usage:#define basename_trivial_usage
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| 32 | //usage: "FILE [SUFFIX]"
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| 33 | //usage:#define basename_full_usage "\n\n"
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| 34 | //usage: "Strip directory path and .SUFFIX from FILE\n"
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| 35 | //usage:
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| 36 | //usage:#define basename_example_usage
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| 37 | //usage: "$ basename /usr/local/bin/foo\n"
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| 38 | //usage: "foo\n"
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| 39 | //usage: "$ basename /usr/local/bin/\n"
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| 40 | //usage: "bin\n"
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| 41 | //usage: "$ basename /foo/bar.txt .txt\n"
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| 42 | //usage: "bar"
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| 43 |
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[1765] | 44 | #include "libbb.h"
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[821] | 45 |
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[1765] | 46 | /* This is a NOFORK applet. Be very careful! */
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| 47 |
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[2725] | 48 | int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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[821] | 49 | int basename_main(int argc, char **argv)
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| 50 | {
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| 51 | size_t m, n;
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| 52 | char *s;
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| 53 |
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[3232] | 54 | if (argv[1] && strcmp(argv[1], "--") == 0) {
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| 55 | argv++;
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| 56 | argc--;
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| 57 | }
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| 58 |
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[2725] | 59 | if ((unsigned)(argc-2) >= 2) {
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[821] | 60 | bb_show_usage();
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| 61 | }
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| 62 |
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[2725] | 63 | /* It should strip slash: /abc/def/ -> def */
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| 64 | s = bb_get_last_path_component_strip(*++argv);
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[821] | 65 |
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[2725] | 66 | m = strlen(s);
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[821] | 67 | if (*++argv) {
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| 68 | n = strlen(*argv);
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[2725] | 69 | if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
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| 70 | m -= n;
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| 71 | /*s[m] = '\0'; - redundant */
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[821] | 72 | }
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| 73 | }
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| 74 |
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[2725] | 75 | /* puts(s) will do, but we can do without stdio this way: */
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| 76 | s[m++] = '\n';
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| 77 | /* NB: != is correct here: */
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| 78 | return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
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[821] | 79 | }
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