Annotation of prex-old/usr/lib/libc/gen/basename.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
! 3: *
! 4: * Permission to use, copy, modify, and distribute this software for any
! 5: * purpose with or without fee is hereby granted, provided that the above
! 6: * copyright notice and this permission notice appear in all copies.
! 7: *
! 8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 15: */
! 16:
! 17: #include <errno.h>
! 18: #include <libgen.h>
! 19: #include <string.h>
! 20: #include <sys/param.h>
! 21:
! 22: char *
! 23: basename(const char *path)
! 24: {
! 25: static char bname[MAXPATHLEN];
! 26: size_t len;
! 27: const char *endp, *startp;
! 28:
! 29: /* Empty or NULL string gets treated as "." */
! 30: if (path == NULL || *path == '\0') {
! 31: bname[0] = '.';
! 32: bname[1] = '\0';
! 33: return (bname);
! 34: }
! 35:
! 36: /* Strip any trailing slashes */
! 37: endp = path + strlen(path) - 1;
! 38: while (endp > path && *endp == '/')
! 39: endp--;
! 40:
! 41: /* All slashes becomes "/" */
! 42: if (endp == path && *endp == '/') {
! 43: bname[0] = '/';
! 44: bname[1] = '\0';
! 45: return (bname);
! 46: }
! 47:
! 48: /* Find the start of the base */
! 49: startp = endp;
! 50: while (startp > path && *(startp - 1) != '/')
! 51: startp--;
! 52:
! 53: len = endp - startp + 1;
! 54: if (len >= sizeof(bname)) {
! 55: errno = ENAMETOOLONG;
! 56: return (NULL);
! 57: }
! 58: memcpy(bname, startp, len);
! 59: bname[len] = '\0';
! 60: return (bname);
! 61: }
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