1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * from: 30 * $FreeBSD$ 31 */ 32 33 #if defined(LIBC_SCCS) && !defined(lint) 34 static char sccsid[] = "@(#)readdir.c 8.3 (Berkeley) 9/29/94"; 35 #endif /* LIBC_SCCS and not lint */ 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "namespace.h" 40 #include <sys/param.h> 41 #define _WANT_FREEBSD11_DIRENT 42 #include <dirent.h> 43 #include <errno.h> 44 #include <stdbool.h> 45 #include <stddef.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <pthread.h> 49 #include "un-namespace.h" 50 51 #include "libc_private.h" 52 #include "gen-private.h" 53 #include "telldir.h" 54 55 #include "gen-compat.h" 56 57 static bool 58 freebsd11_cvtdirent(struct freebsd11_dirent *dstdp, struct dirent *srcdp) 59 { 60 61 if (srcdp->d_namlen >= sizeof(dstdp->d_name)) 62 return (false); 63 dstdp->d_type = srcdp->d_type; 64 dstdp->d_namlen = srcdp->d_namlen; 65 dstdp->d_fileno = srcdp->d_fileno; /* truncate */ 66 dstdp->d_reclen = FREEBSD11_DIRSIZ(dstdp); 67 bcopy(srcdp->d_name, dstdp->d_name, dstdp->d_namlen); 68 bzero(dstdp->d_name + dstdp->d_namlen, 69 dstdp->d_reclen - offsetof(struct freebsd11_dirent, d_name) - 70 dstdp->d_namlen); 71 return (true); 72 } 73 74 struct freebsd11_dirent * 75 freebsd11_readdir(DIR *dirp) 76 { 77 struct freebsd11_dirent *dstdp; 78 struct dirent *dp; 79 80 if (__isthreaded) 81 _pthread_mutex_lock(&dirp->dd_lock); 82 dp = _readdir_unlocked(dirp, RDU_SKIP); 83 if (dp != NULL) { 84 if (dirp->dd_compat_de == NULL) 85 dirp->dd_compat_de = malloc(sizeof(struct 86 freebsd11_dirent)); 87 if (freebsd11_cvtdirent(dirp->dd_compat_de, dp)) 88 dstdp = dirp->dd_compat_de; 89 else 90 dstdp = NULL; 91 } else 92 dstdp = NULL; 93 if (__isthreaded) 94 _pthread_mutex_unlock(&dirp->dd_lock); 95 96 return (dstdp); 97 } 98 99 int 100 freebsd11_readdir_r(DIR *dirp, struct freebsd11_dirent *entry, 101 struct freebsd11_dirent **result) 102 { 103 struct dirent xentry, *xresult; 104 int error; 105 106 error = __readdir_r(dirp, &xentry, &xresult); 107 if (error != 0) 108 return (error); 109 if (xresult != NULL) { 110 if (freebsd11_cvtdirent(entry, &xentry)) 111 *result = entry; 112 else /* should not happen due to RDU_SHORT */ 113 *result = NULL; 114 } else 115 *result = NULL; 116 return (0); 117 } 118 119 __sym_compat(readdir, freebsd11_readdir, FBSD_1.0); 120 __sym_compat(readdir_r, freebsd11_readdir_r, FBSD_1.0); 121