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/*
* Copyright (C) 1999-2008 by CERN/IT/PDP/DM
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: Cns_readdir.c,v $ $Revision: 1.5 $ $Date: 2008/02/04 12:08:52 $ CERN IT-PDP/DM Jean-Philippe Baud";
#endif /* not lint */
/* Cns_readdir - read a directory entry */
#include <errno.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#if defined(_WIN32)
#include <winsock2.h>
#else
#include <unistd.h>
#include <netinet/in.h>
#endif
#include "marshall.h"
#include "Cns_api.h"
#include "Cns.h"
#include "serrno.h"
#if (defined(sun) || defined(linux))
struct dirent64 DLL_DECL *
#else
struct dirent DLL_DECL *
#endif
Cns_readdir64(Cns_DIR *dirp)
{
int c;
int direntsz;
#if (defined(sun) || defined(linux))
struct dirent64 *dp;
#else
struct dirent *dp;
#endif
char func[16];
int getattr = 0;
gid_t gid;
int msglen;
int n;
int nbentries;
char *q;
char *rbp;
char repbuf[DIRBUFSZ 4];
char *sbp;
char sendbuf[REQBUFSZ];
uid_t uid;
strcpy (func, "Cns_readdir");
uid = geteuid();
gid = getegid();
#if defined(_WIN32)
if (uid < 0 || gid < 0) {
Cns_errmsg (func, NS053);
serrno = SENOMAPFND;
return (NULL);
}
#endif
if (! dirp) {
serrno = EFAULT;
return (NULL);
}
/* compute size of client machine dirent structure excluding d_name */
#if (defined(sun) || defined(linux))
dp = (struct dirent64 *) dirp->dd_buf;
#else
dp = (struct dirent *) dirp->dd_buf;
#endif
direntsz = &dp->d_name[0] - (char *) dp;
if (dirp->dd_size == 0) { /* no data in the cache */
if (dirp->eod)
return (NULL);
/* Build request header */
sbp = sendbuf;
marshall_LONG (sbp, CNS_MAGIC);
marshall_LONG (sbp, CNS_READDIR);
q = sbp; /* save pointer. The next field will be updated */
msglen = 3 * LONGSIZE;
marshall_LONG (sbp, msglen);
/* Build request body */
marshall_LONG (sbp, uid);
marshall_LONG (sbp, gid);
marshall_WORD (sbp, getattr);
marshall_WORD (sbp, direntsz);
marshall_HYPER (sbp, dirp->fileid);
marshall_WORD (sbp, dirp->bod);
msglen = sbp - sendbuf;
marshall_LONG (q, msglen); /* update length field */
c = send2nsd (&dirp->dd_fd, NULL, sendbuf, msglen,
repbuf, sizeof(repbuf));
if (c < 0)
return (NULL);
rbp = repbuf;
unmarshall_WORD (rbp, nbentries);
if (nbentries == 0)
return (NULL); /* end of directory */
/* unmarshall reply into the dirent structures */
#if (defined(sun) || defined(linux))
dp = (struct dirent64 *) dirp->dd_buf;
#else
dp = (struct dirent *) dirp->dd_buf;
#endif
while (nbentries--) {
dp->d_ino = 0;
#if defined(__linux__) || defined(sgi) || defined(SOLARIS)
dp->d_off = 0;
#endif
#if defined(_AIX)
dp->d_offset = 0;
#endif
#if defined(linux) || defined(__APPLE__)
dp->d_type = 0;
#endif
unmarshall_STRING (rbp, dp->d_name);
n = strlen (dp->d_name);
#if defined(_AIX) || (defined(__alpha) && defined(__osf__)) || defined(hpux) || defined(__APPLE__) || defined(__GNU__) || defined(__FreeBSD_kernel__)
dp->d_namlen = n;
#endif
dp->d_reclen = ((direntsz n 8) / 8) * 8;
#if (defined(sun) || defined(linux))
dp = (struct dirent64 *) ((char *) dp dp->d_reclen);
#else
dp = (struct dirent *) ((char *) dp dp->d_reclen);
#endif
}
dirp->bod = 0;
unmarshall_WORD (rbp, dirp->eod);
dirp->dd_size = (char *) dp - dirp->dd_buf;
}
#if (defined(sun) || defined(linux))
dp = (struct dirent64 *) (dirp->dd_buf dirp->dd_loc);
#else
dp = (struct dirent *) (dirp->dd_buf dirp->dd_loc);
#endif
dirp->dd_loc = dp->d_reclen;
if (dirp->dd_loc >= dirp->dd_size) { /* must refill next time */
dirp->dd_loc = 0;
dirp->dd_size = 0;
}
return (dp);
}
struct dirent DLL_DECL *
Cns_readdir(Cns_DIR *dirp)
{
#if !defined(SOLARIS) && !defined(linux)
return (Cns_readdir64 (dirp));
#else
struct dirent64 *dp64;
struct dirent *dp32;
short namlen;
if ((dp64 = Cns_readdir64 (dirp)) == NULL)
return (NULL);
namlen = strlen (dp64->d_name);
dp32 = (struct dirent *) dp64;
dp32->d_ino = dp64->d_ino;
#if defined(SOLARIS) || defined(__linux__)
dp32->d_off = dp64->d_off;
#endif
#if defined(linux)
dp32->d_type = dp64->d_type;
#endif
#if defined(__GNU__) || defined(__FreeBSD_kernel__)
dp32->d_namlen = dp64->d_namlen;
#endif
strcpy (dp32->d_name, dp64->d_name);
dp32->d_reclen = ((&dp32->d_name[0] - (char *) dp32 namlen 8) / 8) * 8;
return (dp32);
#endif
}
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