1 /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/cdefs.h> 20 #include <errno.h> 21 #include <libgen.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <sys/param.h> 25 26 char * __freebsd11_basename_r(const char *path, char *bname); 27 char * __freebsd11_basename(char *path); 28 29 char * 30 __freebsd11_basename_r(const char *path, char *bname) 31 { 32 const char *endp, *startp; 33 size_t len; 34 35 /* Empty or NULL string gets treated as "." */ 36 if (path == NULL || *path == '\0') { 37 bname[0] = '.'; 38 bname[1] = '\0'; 39 return (bname); 40 } 41 42 /* Strip any trailing slashes */ 43 endp = path + strlen(path) - 1; 44 while (endp > path && *endp == '/') 45 endp--; 46 47 /* All slashes becomes "/" */ 48 if (endp == path && *endp == '/') { 49 bname[0] = '/'; 50 bname[1] = '\0'; 51 return (bname); 52 } 53 54 /* Find the start of the base */ 55 startp = endp; 56 while (startp > path && *(startp - 1) != '/') 57 startp--; 58 59 len = endp - startp + 1; 60 if (len >= MAXPATHLEN) { 61 errno = ENAMETOOLONG; 62 return (NULL); 63 } 64 memcpy(bname, startp, len); 65 bname[len] = '\0'; 66 return (bname); 67 } 68 69 char * 70 __freebsd11_basename(char *path) 71 { 72 static char *bname = NULL; 73 74 if (bname == NULL) { 75 bname = (char *)malloc(MAXPATHLEN); 76 if (bname == NULL) 77 return (NULL); 78 } 79 return (__freebsd11_basename_r(path, bname)); 80 } 81 82 __sym_compat(basename_r, __freebsd11_basename_r, FBSD_1.2); 83 __sym_compat(basename, __freebsd11_basename, FBSD_1.0); 84