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80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini basename implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Changes:
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* 1) Now checks for too many args. Need at least one and at most two.
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* 2) Don't check for options, as per SUSv3.
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* 3) Save some space by using strcmp(). Calling strncmp() here was silly.
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
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//kbuild:lib-$(CONFIG_BASENAME) += basename.o
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//config:config BASENAME
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//config: bool "basename"
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//config: default y
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//config: help
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//config: basename is used to strip the directory and suffix from filenames,
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//config: leaving just the filename itself. Enable this option if you wish
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//config: to enable the 'basename' utility.
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//usage:#define basename_trivial_usage
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//usage: "FILE [SUFFIX]"
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//usage:#define basename_full_usage "\n\n"
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//usage: "Strip directory path and .SUFFIX from FILE"
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//usage:
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//usage:#define basename_example_usage
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//usage: "$ basename /usr/local/bin/foo\n"
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//usage: "foo\n"
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//usage: "$ basename /usr/local/bin/\n"
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//usage: "bin\n"
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//usage: "$ basename /foo/bar.txt .txt\n"
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//usage: "bar"
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#include "libbb.h"
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/* This is a NOFORK applet. Be very careful! */
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int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int basename_main(int argc, char **argv)
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{
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size_t m, n;
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char *s;
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if (argv[1] && strcmp(argv[1], "--") == 0) {
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argv++;
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argc--;
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}
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if ((unsigned)(argc-2) >= 2) {
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bb_show_usage();
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}
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/* It should strip slash: /abc/def/ -> def */
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s = bb_get_last_path_component_strip(*++argv);
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m = strlen(s);
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if (*++argv) {
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n = strlen(*argv);
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if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
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m -= n;
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/*s[m] = '\0'; - redundant */
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}
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}
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/* puts(s) will do, but we can do without stdio this way: */
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s[m++] = '\n';
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/* NB: != is correct here: */
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return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
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}
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