1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1994 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <unistd.h>
30*0Sstevel@tonic-gate #include <sys/types.h>
31*0Sstevel@tonic-gate #include <sys/dirent.h>
32*0Sstevel@tonic-gate #include <sys/syscall.h>
33*0Sstevel@tonic-gate #include <sys/param.h>
34*0Sstevel@tonic-gate #include <sys/errno.h>
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate #define ALIGN 4
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate extern int errno;
39*0Sstevel@tonic-gate
40*0Sstevel@tonic-gate struct n_dirent{
41*0Sstevel@tonic-gate unsigned long d_ino;
42*0Sstevel@tonic-gate long d_off;
43*0Sstevel@tonic-gate unsigned short d_reclen;
44*0Sstevel@tonic-gate char d_name[1];
45*0Sstevel@tonic-gate };
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate
getdents(fd,buf,bytes)48*0Sstevel@tonic-gate int getdents(fd, buf, bytes)
49*0Sstevel@tonic-gate int fd;
50*0Sstevel@tonic-gate char *buf;
51*0Sstevel@tonic-gate int bytes;
52*0Sstevel@tonic-gate {
53*0Sstevel@tonic-gate return(bc_getdents(fd, buf, bytes));
54*0Sstevel@tonic-gate }
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate
bc_getdents(fd,buf,bytes)57*0Sstevel@tonic-gate int bc_getdents(fd, buf, bytes)
58*0Sstevel@tonic-gate int fd;
59*0Sstevel@tonic-gate char *buf;
60*0Sstevel@tonic-gate int bytes;
61*0Sstevel@tonic-gate {
62*0Sstevel@tonic-gate int ret, nbytes;
63*0Sstevel@tonic-gate char *nbuf;
64*0Sstevel@tonic-gate struct dirent *dir;
65*0Sstevel@tonic-gate struct n_dirent *ndir;
66*0Sstevel@tonic-gate int count=0;
67*0Sstevel@tonic-gate off_t last_off;
68*0Sstevel@tonic-gate
69*0Sstevel@tonic-gate if (buf == (char *)0 || buf == (char *)-1) {
70*0Sstevel@tonic-gate errno = EFAULT;
71*0Sstevel@tonic-gate return(-1);
72*0Sstevel@tonic-gate }
73*0Sstevel@tonic-gate
74*0Sstevel@tonic-gate nbytes = bytes; /* buffer can only be as large as user expects */
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate if ((nbuf = (char *)malloc(nbytes)) == NULL) {
77*0Sstevel@tonic-gate return(-1);
78*0Sstevel@tonic-gate }
79*0Sstevel@tonic-gate
80*0Sstevel@tonic-gate if ((ret = _syscall(SYS_getdents, fd, nbuf, nbytes)) == -1) {
81*0Sstevel@tonic-gate free(nbuf);
82*0Sstevel@tonic-gate return(ret);
83*0Sstevel@tonic-gate }
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate
86*0Sstevel@tonic-gate dir = (struct dirent *)buf;
87*0Sstevel@tonic-gate ndir = (struct n_dirent *)nbuf; /* source directory format */
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate while ((((int)(((char *)dir) + sizeof(struct n_dirent) +
90*0Sstevel@tonic-gate strlen(ndir->d_name) + ALIGN) & ~(ALIGN - 1)) <
91*0Sstevel@tonic-gate (int)(buf + bytes)) &&
92*0Sstevel@tonic-gate ((char *)ndir + sizeof(struct n_dirent) <= (nbuf + ret))) {
93*0Sstevel@tonic-gate dir->d_off = ndir->d_off;
94*0Sstevel@tonic-gate dir->d_fileno = ndir->d_ino; /* NOT VALID */
95*0Sstevel@tonic-gate dir->d_namlen = strlen(ndir->d_name);
96*0Sstevel@tonic-gate dir->d_reclen = (short)((sizeof(struct dirent) - MAXNAMLEN +
97*0Sstevel@tonic-gate dir->d_namlen + ALIGN) & -ALIGN);
98*0Sstevel@tonic-gate strncpy(dir->d_name, ndir->d_name, dir->d_namlen);
99*0Sstevel@tonic-gate dir->d_name[dir->d_namlen] = '\0';
100*0Sstevel@tonic-gate count += dir->d_reclen;
101*0Sstevel@tonic-gate last_off = ndir->d_off;
102*0Sstevel@tonic-gate dir = (struct dirent *)((char *)dir +
103*0Sstevel@tonic-gate ((int)( dir->d_reclen)));
104*0Sstevel@tonic-gate ndir = (struct n_dirent *)((char *)ndir +
105*0Sstevel@tonic-gate ((int)(ndir->d_reclen)));
106*0Sstevel@tonic-gate }
107*0Sstevel@tonic-gate
108*0Sstevel@tonic-gate /*
109*0Sstevel@tonic-gate * Seek to the next entry in the directory. If all entries
110*0Sstevel@tonic-gate * in ndir were not copied to dir, the next getdents syscall
111*0Sstevel@tonic-gate * will start reading from there.
112*0Sstevel@tonic-gate */
113*0Sstevel@tonic-gate (void)lseek(fd, last_off, SEEK_SET);
114*0Sstevel@tonic-gate free(nbuf);
115*0Sstevel@tonic-gate return(count);
116*0Sstevel@tonic-gate }
117