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