busybox/coreutils/basename.c

/* 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 tarball for details.
 */

/* 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.
 */

/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */

//kbuild:lib-$(CONFIG_BASENAME) += basename.o

//config:config BASENAME
//config:	bool "basename"
//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.

#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, char **argv)
{
	size_t m, n;
	char *s;

	if ((unsigned)(argc-2) >= 2) {
		bb_show_usage();
	}

	/* It should strip slash: /abc/def/ -> def */
	s = bb_get_last_path_component_strip(*++argv);

	m = strlen(s);
	if (*++argv) {
		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;
}
1	niro	532	/* 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 tarball for details.
8			*/
9
10			/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
11			*
12			* Changes:
13			* 1) Now checks for too many args. Need at least one and at most two.
14			* 2) Don't check for options, as per SUSv3.
15			* 3) Save some space by using strcmp(). Calling strncmp() here was silly.
16			*/
17
18	niro	1123	/* BB_AUDIT SUSv3 compliant */
19			/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
20
21			//kbuild:lib-$(CONFIG_BASENAME) += basename.o
22
23			//config:config BASENAME
24			//config: bool "basename"
25			//config: default y
26			//config: help
27			//config: basename is used to strip the directory and suffix from filenames,
28			//config: leaving just the filename itself. Enable this option if you wish
29			//config: to enable the 'basename' utility.
30
31	niro	816	#include "libbb.h"
32	niro	532
33	niro	816	/* This is a NOFORK applet. Be very careful! */
34
35			int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
36	niro	532	int basename_main(int argc, char **argv)
37			{
38			size_t m, n;
39			char *s;
40
41	niro	1123	if ((unsigned)(argc-2) >= 2) {
42	niro	532	bb_show_usage();
43			}
44
45	niro	816	/* It should strip slash: /abc/def/ -> def */
46			s = bb_get_last_path_component_strip(*++argv);
47	niro	532
48	niro	816	m = strlen(s);
49	niro	532	if (*++argv) {
50			n = strlen(*argv);
51	niro	1123	if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
52	niro	816	m -= n;
53			/s[m] = '\0'; - redundant /
54	niro	532	}
55			}
56
57	niro	816	/* puts(s) will do, but we can do without stdio this way: */
58			s[m++] = '\n';
59			/* NB: != is correct here: */
60			return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
61	niro	532	}