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annotate extern/libcompat/src/basename.c @ 1004:3ea3361f0fc7

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irccd: now track modes
author David Demelier <markand@malikania.fr>
date Tue, 16 Feb 2021 18:37:22 +0100
parents 243f9f51b0ff
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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243f9f51b0ff irccd: import libcompat and utilities
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1 /* $OpenBSD: basename.c,v 1.17 2020/10/20 19:30:14 naddy Exp $ */
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2
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3 /*
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4 * Copyright (c) 1997, 2004 Todd C. Miller <millert@openbsd.org>
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5 *
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6 * Permission to use, copy, modify, and distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <errno.h>
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20 #include <libgen.h>
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21 #include <limits.h>
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22 #include <string.h>
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23
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24 #ifndef PATH_MAX
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25 # define PATH_MAX 2048
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26 #endif
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27
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28 char *
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29 basename(char *path)
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30 {
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31 static char bname[PATH_MAX];
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32 size_t len;
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33 const char *endp, *startp;
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34
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35 /* Empty or NULL string gets treated as "." */
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36 if (path == NULL || *path == '\0') {
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37 bname[0] = '.';
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38 bname[1] = '\0';
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39 return (bname);
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40 }
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41
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42 /* Strip any trailing slashes */
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43 endp = path + strlen(path) - 1;
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44 while (endp > path && *endp == '/')
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45 endp--;
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46
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47 /* All slashes becomes "/" */
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48 if (endp == path && *endp == '/') {
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49 bname[0] = '/';
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50 bname[1] = '\0';
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51 return (bname);
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52 }
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53
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54 /* Find the start of the base */
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55 startp = endp;
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56 while (startp > path && *(startp - 1) != '/')
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57 startp--;
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58
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59 len = endp - startp + 1;
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60 if (len >= sizeof(bname)) {
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61 errno = ENAMETOOLONG;
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62 return (NULL);
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63 }
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64 memcpy(bname, startp, len);
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65 bname[len] = '\0';
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66 return (bname);
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67 }