1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */
29*7c478bd9Sstevel@tonic-gate
30*7c478bd9Sstevel@tonic-gate /*
31*7c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988
32*7c478bd9Sstevel@tonic-gate * The Regents of the University of California
33*7c478bd9Sstevel@tonic-gate * All Rights Reserved
34*7c478bd9Sstevel@tonic-gate *
35*7c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
36*7c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
37*7c478bd9Sstevel@tonic-gate * contributors.
38*7c478bd9Sstevel@tonic-gate */
39*7c478bd9Sstevel@tonic-gate
40*7c478bd9Sstevel@tonic-gate /*LINTLIBRARY*/
41*7c478bd9Sstevel@tonic-gate
42*7c478bd9Sstevel@tonic-gate /*
43*7c478bd9Sstevel@tonic-gate * readdir -- C library extension routine
44*7c478bd9Sstevel@tonic-gate */
45*7c478bd9Sstevel@tonic-gate
46*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
47*7c478bd9Sstevel@tonic-gate #include <sys/dir.h>
48*7c478bd9Sstevel@tonic-gate #include <sys/dirent.h>
49*7c478bd9Sstevel@tonic-gate #include <limits.h>
50*7c478bd9Sstevel@tonic-gate #include <string.h>
51*7c478bd9Sstevel@tonic-gate #include <errno.h>
52*7c478bd9Sstevel@tonic-gate #include "libc.h"
53*7c478bd9Sstevel@tonic-gate
54*7c478bd9Sstevel@tonic-gate static struct direct dc;
55*7c478bd9Sstevel@tonic-gate static struct direct64 dc64;
56*7c478bd9Sstevel@tonic-gate
57*7c478bd9Sstevel@tonic-gate static struct direct64 *
internal_readdir(DIR * dirp)58*7c478bd9Sstevel@tonic-gate internal_readdir(DIR *dirp)
59*7c478bd9Sstevel@tonic-gate {
60*7c478bd9Sstevel@tonic-gate struct dirent64 *dp; /* -> directory data */
61*7c478bd9Sstevel@tonic-gate int saveloc = 0;
62*7c478bd9Sstevel@tonic-gate
63*7c478bd9Sstevel@tonic-gate if (dirp->dd_size != 0) {
64*7c478bd9Sstevel@tonic-gate dp = (struct dirent64 *)&dirp->dd_buf[dirp->dd_loc];
65*7c478bd9Sstevel@tonic-gate saveloc = dirp->dd_loc; /* save for possible EOF */
66*7c478bd9Sstevel@tonic-gate dirp->dd_loc += dp->d_reclen;
67*7c478bd9Sstevel@tonic-gate }
68*7c478bd9Sstevel@tonic-gate if (dirp->dd_loc >= dirp->dd_size)
69*7c478bd9Sstevel@tonic-gate dirp->dd_loc = dirp->dd_size = 0;
70*7c478bd9Sstevel@tonic-gate
71*7c478bd9Sstevel@tonic-gate if (dirp->dd_size == 0 && /* refill buffer */
72*7c478bd9Sstevel@tonic-gate (dirp->dd_size = getdents64(dirp->dd_fd,
73*7c478bd9Sstevel@tonic-gate (struct dirent64 *)dirp->dd_buf, DIRBUF)) <= 0) {
74*7c478bd9Sstevel@tonic-gate if (dirp->dd_size == 0) /* This means EOF */
75*7c478bd9Sstevel@tonic-gate dirp->dd_loc = saveloc; /* EOF so save for telldir */
76*7c478bd9Sstevel@tonic-gate return (NULL); /* error or EOF */
77*7c478bd9Sstevel@tonic-gate }
78*7c478bd9Sstevel@tonic-gate
79*7c478bd9Sstevel@tonic-gate dp = (struct dirent64 *)&dirp->dd_buf[dirp->dd_loc];
80*7c478bd9Sstevel@tonic-gate
81*7c478bd9Sstevel@tonic-gate /* Copy dirent into direct */
82*7c478bd9Sstevel@tonic-gate dc64.d_ino = dp->d_ino;
83*7c478bd9Sstevel@tonic-gate dc64.d_reclen = dp->d_reclen;
84*7c478bd9Sstevel@tonic-gate dc64.d_namlen = (ushort_t)strlen(dp->d_name);
85*7c478bd9Sstevel@tonic-gate if (dc64.d_namlen > MAXNAMLEN) {
86*7c478bd9Sstevel@tonic-gate errno = ENAMETOOLONG;
87*7c478bd9Sstevel@tonic-gate return (NULL);
88*7c478bd9Sstevel@tonic-gate }
89*7c478bd9Sstevel@tonic-gate (void) strcpy(dc64.d_name, dp->d_name);
90*7c478bd9Sstevel@tonic-gate
91*7c478bd9Sstevel@tonic-gate return (&dc64);
92*7c478bd9Sstevel@tonic-gate }
93*7c478bd9Sstevel@tonic-gate
94*7c478bd9Sstevel@tonic-gate struct direct *
readdir(DIR * dirp)95*7c478bd9Sstevel@tonic-gate readdir(DIR *dirp)
96*7c478bd9Sstevel@tonic-gate {
97*7c478bd9Sstevel@tonic-gate if (internal_readdir(dirp) == NULL)
98*7c478bd9Sstevel@tonic-gate return (NULL);
99*7c478bd9Sstevel@tonic-gate
100*7c478bd9Sstevel@tonic-gate /* Check for overflows */
101*7c478bd9Sstevel@tonic-gate if (dc64.d_ino > SIZE_MAX) {
102*7c478bd9Sstevel@tonic-gate errno = EOVERFLOW;
103*7c478bd9Sstevel@tonic-gate return (NULL);
104*7c478bd9Sstevel@tonic-gate }
105*7c478bd9Sstevel@tonic-gate
106*7c478bd9Sstevel@tonic-gate /* Copy dirent into direct */
107*7c478bd9Sstevel@tonic-gate dc.d_ino = dc64.d_ino;
108*7c478bd9Sstevel@tonic-gate dc.d_reclen = dc64.d_reclen - 4;
109*7c478bd9Sstevel@tonic-gate dc.d_namlen = dc64.d_namlen;
110*7c478bd9Sstevel@tonic-gate (void) strcpy(dc.d_name, dc64.d_name);
111*7c478bd9Sstevel@tonic-gate
112*7c478bd9Sstevel@tonic-gate return (&dc);
113*7c478bd9Sstevel@tonic-gate }
114*7c478bd9Sstevel@tonic-gate
115*7c478bd9Sstevel@tonic-gate #if !defined(_LP64)
116*7c478bd9Sstevel@tonic-gate struct direct64 *
readdir64(DIR * dirp)117*7c478bd9Sstevel@tonic-gate readdir64(DIR *dirp)
118*7c478bd9Sstevel@tonic-gate {
119*7c478bd9Sstevel@tonic-gate return (internal_readdir(dirp));
120*7c478bd9Sstevel@tonic-gate }
121*7c478bd9Sstevel@tonic-gate #endif
122