blob: ace0148c034ab4646871d32c807032f676402817
| 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 | |
| 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 | //config:config BASENAME |
| 18 | //config: bool "basename" |
| 19 | //config: default y |
| 20 | //config: help |
| 21 | //config: basename is used to strip the directory and suffix from filenames, |
| 22 | //config: leaving just the filename itself. Enable this option if you wish |
| 23 | //config: to enable the 'basename' utility. |
| 24 | |
| 25 | //applet:IF_BASENAME(APPLET_NOFORK(basename, basename, BB_DIR_USR_BIN, BB_SUID_DROP, basename)) |
| 26 | |
| 27 | //kbuild:lib-$(CONFIG_BASENAME) += basename.o |
| 28 | |
| 29 | /* BB_AUDIT SUSv3 compliant */ |
| 30 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */ |
| 31 | |
| 32 | //usage:#define basename_trivial_usage |
| 33 | //usage: "FILE [SUFFIX]" |
| 34 | //usage:#define basename_full_usage "\n\n" |
| 35 | //usage: "Strip directory path and .SUFFIX from FILE" |
| 36 | //usage: |
| 37 | //usage:#define basename_example_usage |
| 38 | //usage: "$ basename /usr/local/bin/foo\n" |
| 39 | //usage: "foo\n" |
| 40 | //usage: "$ basename /usr/local/bin/\n" |
| 41 | //usage: "bin\n" |
| 42 | //usage: "$ basename /foo/bar.txt .txt\n" |
| 43 | //usage: "bar" |
| 44 | |
| 45 | #include "libbb.h" |
| 46 | |
| 47 | /* This is a NOFORK applet. Be very careful! */ |
| 48 | |
| 49 | int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 50 | int basename_main(int argc, char **argv) |
| 51 | { |
| 52 | size_t m, n; |
| 53 | char *s; |
| 54 | |
| 55 | if (argv[1] && strcmp(argv[1], "--") == 0) { |
| 56 | argv++; |
| 57 | argc--; |
| 58 | } |
| 59 | |
| 60 | if ((unsigned)(argc-2) >= 2) { |
| 61 | bb_show_usage(); |
| 62 | } |
| 63 | |
| 64 | /* It should strip slash: /abc/def/ -> def */ |
| 65 | s = bb_get_last_path_component_strip(*++argv); |
| 66 | |
| 67 | m = strlen(s); |
| 68 | if (*++argv) { |
| 69 | n = strlen(*argv); |
| 70 | if ((m > n) && (strcmp(s+m-n, *argv) == 0)) { |
| 71 | m -= n; |
| 72 | /*s[m] = '\0'; - redundant */ |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | /* puts(s) will do, but we can do without stdio this way: */ |
| 77 | s[m++] = '\n'; |
| 78 | /* NB: != is correct here: */ |
| 79 | return full_write(STDOUT_FILENO, s, m) != (ssize_t)m; |
| 80 | } |
| 81 |