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.
 *
 */

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


/* 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.
 */

#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 int)(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	/* 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
11	/* BB_AUDIT SUSv3 compliant */
12	/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
13
14
15	/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
16	*
17	* Changes:
18	* 1) Now checks for too many args. Need at least one and at most two.
19	* 2) Don't check for options, as per SUSv3.
20	* 3) Save some space by using strcmp(). Calling strncmp() here was silly.
21	*/
22
23	#include "libbb.h"
24
25	/* This is a NOFORK applet. Be very careful! */
26
27	int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
28	int basename_main(int argc, char **argv)
29	{
30	size_t m, n;
31	char *s;
32
33	if (((unsigned int)(argc-2)) >= 2) {
34	bb_show_usage();
35	}
36
37	/* It should strip slash: /abc/def/ -> def */
38	s = bb_get_last_path_component_strip(*++argv);
39
40	m = strlen(s);
41	if (*++argv) {
42	n = strlen(*argv);
43	if ((m > n) && ((strcmp)(s+m-n, *argv) == 0)) {
44	m -= n;
45	/s[m] = '\0'; - redundant /
46	}
47	}
48
49	/* puts(s) will do, but we can do without stdio this way: */
50	s[m++] = '\n';
51	/* NB: != is correct here: */
52	return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
53	}