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