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: @(#)readdir.c 8.3 (Berkeley) 9/29/94 30 * From: FreeBSD: head/lib/libc/gen/readdir.c 314436 2017-02-28 23:42:47Z imp 31 */ 32 33 #include <sys/cdefs.h> 34 #include "namespace.h" 35 #include <sys/param.h> 36 #define _WANT_FREEBSD11_DIRENT 37 #include <dirent.h> 38 #include <errno.h> 39 #include <stdbool.h> 40 #include <stddef.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <pthread.h> 44 #include "un-namespace.h" 45 46 #include "libc_private.h" 47 #include "gen-private.h" 48 #include "telldir.h" 49 50 #include "gen-compat.h" 51 52 static bool 53 freebsd11_cvtdirent(struct freebsd11_dirent *dstdp, struct dirent *srcdp) 54 { 55 56 if (srcdp->d_namlen >= sizeof(dstdp->d_name)) 57 return (false); 58 dstdp->d_type = srcdp->d_type; 59 dstdp->d_namlen = srcdp->d_namlen; 60 dstdp->d_fileno = srcdp->d_fileno; /* truncate */ 61 dstdp->d_reclen = FREEBSD11_DIRSIZ(dstdp); 62 bcopy(srcdp->d_name, dstdp->d_name, dstdp->d_namlen); 63 bzero(dstdp->d_name + dstdp->d_namlen, 64 dstdp->d_reclen - offsetof(struct freebsd11_dirent, d_name) - 65 dstdp->d_namlen); 66 return (true); 67 } 68 69 struct freebsd11_dirent * 70 freebsd11_readdir(DIR *dirp) 71 { 72 struct freebsd11_dirent *dstdp; 73 struct dirent *dp; 74 75 if (__isthreaded) 76 _pthread_mutex_lock(&dirp->dd_lock); 77 dp = _readdir_unlocked(dirp, RDU_SKIP); 78 if (dp != NULL) { 79 if (dirp->dd_compat_de == NULL) 80 dirp->dd_compat_de = malloc(sizeof(struct 81 freebsd11_dirent)); 82 if (freebsd11_cvtdirent(dirp->dd_compat_de, dp)) 83 dstdp = dirp->dd_compat_de; 84 else 85 dstdp = NULL; 86 } else 87 dstdp = NULL; 88 if (__isthreaded) 89 _pthread_mutex_unlock(&dirp->dd_lock); 90 91 return (dstdp); 92 } 93 94 int 95 freebsd11_readdir_r(DIR *dirp, struct freebsd11_dirent *entry, 96 struct freebsd11_dirent **result) 97 { 98 struct dirent xentry, *xresult; 99 int error; 100 101 error = __readdir_r(dirp, &xentry, &xresult); 102 if (error != 0) 103 return (error); 104 if (xresult != NULL) { 105 if (freebsd11_cvtdirent(entry, &xentry)) 106 *result = entry; 107 else /* should not happen due to RDU_SHORT */ 108 *result = NULL; 109 } else 110 *result = NULL; 111 return (0); 112 } 113 114 __sym_compat(readdir, freebsd11_readdir, FBSD_1.0); 115 __sym_compat(readdir_r, freebsd11_readdir_r, FBSD_1.0); 116