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/* vi: set sw=4 ts=4: */
/*
* Mini basename implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Changes:
* 1) Now checks for too many args. Need at least one and at most two.
* 2) Don't check for options, as per SUSv3.
* 3) Save some space by using strcmp(). Calling strncmp() here was silly.
*/
//config:config BASENAME
//config: bool "basename (438 bytes)"
//config: default y
//config: help
//config: basename is used to strip the directory and suffix from filenames,
//config: leaving just the filename itself. Enable this option if you wish
//config: to enable the 'basename' utility.
//applet:IF_BASENAME(APPLET_NOFORK(basename, basename, BB_DIR_USR_BIN, BB_SUID_DROP, basename))
//kbuild:lib-$(CONFIG_BASENAME) += basename.o
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
//usage:#define basename_trivial_usage
//usage: "FILE [SUFFIX]"
//usage:#define basename_full_usage "\n\n"
//usage: "Strip directory path and .SUFFIX from FILE"
//usage:
//usage:#define basename_example_usage
//usage: "$ basename /usr/local/bin/foo\n"
//usage: "foo\n"
//usage: "$ basename /usr/local/bin/\n"
//usage: "bin\n"
//usage: "$ basename /foo/bar.txt .txt\n"
//usage: "bar"
#include "libbb.h"
/* This is a NOFORK applet. Be very careful! */
int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int basename_main(int argc UNUSED_PARAM, char **argv)
{
size_t m, n;
char *s;
if (argv[1] && strcmp(argv[1], "--") == 0) {
argv++;
}
if (!argv[1])
bb_show_usage();
/* It should strip slash: /abc/def/ -> def */
s = bb_get_last_path_component_strip(*++argv);
m = strlen(s);
if (*++argv) {
if (argv[1])
bb_show_usage();
n = strlen(*argv);
if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
m -= n;
/*s[m] = '\0'; - redundant */
}
}
/* puts(s) will do, but we can do without stdio this way: */
s[m++] = '\n';
/* NB: != is correct here: */
return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
}
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