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64 lines
1.6 KiB
C
64 lines
1.6 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 tarball for details.
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*
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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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/* 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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//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 n
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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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#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 (((unsigned int)(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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