1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini basename implementation for busybox
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4 | *
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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11 | *
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12 | * Changes:
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13 | * 1) Now checks for too many args. Need at least one and at most two.
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14 | * 2) Don't check for options, as per SUSv3.
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15 | * 3) Save some space by using strcmp(). Calling strncmp() here was silly.
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16 | */
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17 |
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18 | /* BB_AUDIT SUSv3 compliant */
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19 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
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20 |
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21 | //kbuild:lib-$(CONFIG_BASENAME) += basename.o
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22 |
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23 | //config:config BASENAME
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24 | //config: bool "basename"
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25 | //config: default y
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26 | //config: help
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27 | //config: basename is used to strip the directory and suffix from filenames,
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28 | //config: leaving just the filename itself. Enable this option if you wish
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29 | //config: to enable the 'basename' utility.
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30 |
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31 | #include "libbb.h"
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32 |
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33 | /* This is a NOFORK applet. Be very careful! */
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34 |
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35 | int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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36 | int basename_main(int argc, char **argv)
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37 | {
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38 | size_t m, n;
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39 | char *s;
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40 |
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41 | if ((unsigned)(argc-2) >= 2) {
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42 | bb_show_usage();
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43 | }
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44 |
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45 | /* It should strip slash: /abc/def/ -> def */
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46 | s = bb_get_last_path_component_strip(*++argv);
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47 |
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48 | m = strlen(s);
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49 | if (*++argv) {
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50 | n = strlen(*argv);
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51 | if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
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52 | m -= n;
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53 | /*s[m] = '\0'; - redundant */
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54 | }
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55 | }
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56 |
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57 | /* puts(s) will do, but we can do without stdio this way: */
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58 | s[m++] = '\n';
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59 | /* NB: != is correct here: */
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60 | return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
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61 | }
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