86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */
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/*
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* Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <errno.h>
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#include <libgen.h>
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#include <stdlib.h>
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#include <string.h>
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//#include <sys/param.h>
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#define MAXPATHLEN 1024
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#ifndef ENAMETOOLONG
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#define ENAMETOOLONG EINVAL
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#endif
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static int is_sep(char c) {
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return c == '/' || c == ':';
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}
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char *
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basename_r(const char *path, char *bname)
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{
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const char *endp, *startp;
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size_t len;
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/* Empty or NULL string gets treated as "." */
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if (path == NULL || *path == '\0') {
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bname[0] = '.';
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bname[1] = '\0';
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return (bname);
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}
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/* Strip any trailing slashes */
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endp = path + strlen(path) - 1;
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while (endp > path && is_sep(*endp))
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endp--;
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/* All slashes becomes "/" */
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if (endp == path && is_sep(*endp)) {
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bname[0] = '/';
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bname[1] = '\0';
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return (bname);
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}
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/* Find the start of the base */
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startp = endp;
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while (startp > path && !is_sep(*(startp - 1)))
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startp--;
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len = endp - startp + 1;
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if (len >= MAXPATHLEN) {
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errno = ENAMETOOLONG;
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return (NULL);
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}
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memcpy(bname, startp, len);
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bname[len] = '\0';
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return (bname);
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}
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char *
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basename(const char *path)
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{
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static char *bname = NULL;
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if (bname == NULL) {
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bname = (char *)malloc(MAXPATHLEN);
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if (bname == NULL)
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return (NULL);
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}
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return (basename_r(path, bname));
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}
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