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 source tree. 8 */ 9/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) 10 * 11 * Changes: 12 * 1) Now checks for too many args. Need at least one and at most two. 13 * 2) Don't check for options, as per SUSv3. 14 * 3) Save some space by using strcmp(). Calling strncmp() here was silly. 15 */ 16//config:config BASENAME 17//config: bool "basename (371 bytes)" 18//config: default y 19//config: help 20//config: basename is used to strip the directory and suffix from filenames, 21//config: leaving just the filename itself. Enable this option if you wish 22//config: to enable the 'basename' utility. 23 24//applet:IF_BASENAME(APPLET_NOFORK(basename, basename, BB_DIR_USR_BIN, BB_SUID_DROP, basename)) 25 26//kbuild:lib-$(CONFIG_BASENAME) += basename.o 27 28/* BB_AUDIT SUSv3 compliant */ 29/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */ 30 31//usage:#define basename_trivial_usage 32//usage: "FILE [SUFFIX]" 33//usage:#define basename_full_usage "\n\n" 34//usage: "Strip directory path and .SUFFIX from FILE" 35//usage: 36//usage:#define basename_example_usage 37//usage: "$ basename /usr/local/bin/foo\n" 38//usage: "foo\n" 39//usage: "$ basename /usr/local/bin/\n" 40//usage: "bin\n" 41//usage: "$ basename /foo/bar.txt .txt\n" 42//usage: "bar" 43 44#include "libbb.h" 45 46/* This is a NOFORK applet. Be very careful! */ 47 48int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 49int basename_main(int argc UNUSED_PARAM, char **argv) 50{ 51 size_t m, n; 52 char *s; 53 54 if (argv[1] && strcmp(argv[1], "--") == 0) { 55 argv++; 56 } 57 if (!argv[1]) 58 bb_show_usage(); 59 60 /* It should strip slash: /abc/def/ -> def */ 61 s = bb_get_last_path_component_strip(*++argv); 62 63 m = strlen(s); 64 if (*++argv) { 65 if (argv[1]) 66 bb_show_usage(); 67 n = strlen(*argv); 68 if ((m > n) && (strcmp(s+m-n, *argv) == 0)) { 69 m -= n; 70 /*s[m] = '\0'; - redundant */ 71 } 72 } 73 74 /* puts(s) will do, but we can do without stdio this way: */ 75 s[m++] = '\n'; 76 /* NB: != is correct here: */ 77 return full_write(STDOUT_FILENO, s, m) != (ssize_t)m; 78} 79