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/*
* $Id: readdir.c,v 1.1 2005/03/31 13:13:01 baud Exp $
*/
/*
* Copyright (C) 1990-2003 by CERN/IT/PDP/DM
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: readdir.c,v $ $Revision: 1.1 $ $Date: 2005/03/31 13:13:01 $ CERN/IT/PDP/DM Olof Barring";
#endif /* not lint */
/* readdir.c Remote File I/O - read a directory entry */
#include <syslog.h> /* system logger */
/*
* System remote file I/O definitions
*/
#define RFIO_KERNEL 1
#include "rfio.h"
#include "rfio_rdirfdt.h"
/*
* Remote directory read
*/
struct dirent DLL_DECL *rfio_readdir(dirp)
RDIR *dirp;
{
int status ; /* Status and return code from remote */
int rcode;
int req;
int s;
int s_index;
int namlen;
struct dirent *de;
char *p;
extern RDIR *rdirfdt[MAXRFD];
char rfio_buf[BUFSIZ];
INIT_TRACE("RFIO_TRACE");
TRACE(1, "rfio", "rfio_readdir(%x)", dirp);
/*
* Search internal table for this directory pointer
* Check first that it's not the last one used
*/
s_index = rfio_rdirfdt_findptr(dirp,FINDRDIR_WITH_SCAN);
/*
* The directory is local.
*/
if (s_index == -1) {
TRACE(2,"rfio","rfio_readdir: check if HSM directory");
if ( rfio_HsmIf_IsHsmDirEntry((DIR *)dirp) != -1 ) {
de = rfio_HsmIf_readdir((DIR *)dirp);
} else {
TRACE(2,"rfio","rfio_readdir: using local readdir(%x)", dirp);
#if defined(_WIN32)
de = NULL;
serrno = SEOPNOTSUP;
#else /* _WIN32 */
de = readdir((DIR *)dirp);
if ( ! de ) serrno = 0;
#endif /* _WIN32 */
}
END_TRACE();
return(de);
}
s = rdirfdt[s_index]->s;
/*
* Associate the static dirent area allocate with this
* directory descriptor.
*/
de = (struct dirent *)rdirfdt[s_index]->dp.dd_buf;
/*
* Checking magic number.
*/
if (rdirfdt[s_index]->magic != RFIO_MAGIC) {
serrno = SEBADVERSION ;
rfio_rdirfdt_freeentry(s_index);
(void) close(s) ;
END_TRACE();
return(NULL);
}
p = rfio_buf;
marshall_WORD(p, RFIO_MAGIC);
marshall_WORD(p, RQST_READDIR) ;
TRACE(2,"rfio","rfio_readdir: writing %d bytes",RQSTSIZE) ;
if (netwrite_timeout(s,rfio_buf,RQSTSIZE,RFIO_CTRL_TIMEOUT) != RQSTSIZE) {
TRACE(2,"rfio","rfio_readdir: write(): ERROR occured (errno=%d)", errno) ;
END_TRACE() ;
return(NULL) ;
}
TRACE(2, "rfio", "rfio_readdir: reading %d bytes",WORDSIZE+3*LONGSIZE) ;
if ( netread_timeout(s,rfio_buf,WORDSIZE+3*LONGSIZE,RFIO_CTRL_TIMEOUT) != (WORDSIZE+3*LONGSIZE) ) {
TRACE(2,"rfio","rfio_readdir: read(): ERROR occured (errno=%d)", errno);
END_TRACE();
return(NULL) ;
}
p= rfio_buf ;
unmarshall_WORD(p,req) ; /* RQST_READDIR */
unmarshall_LONG(p,status) ;
unmarshall_LONG(p, rcode) ;
unmarshall_LONG(p,namlen) ;
if ( status < 0 ) {
rfio_errno= rcode ;
if ( rcode == 0 )
serrno = SENORCODE ;
END_TRACE() ;
return(NULL) ;
}
if ( namlen > 0 ) {
TRACE(2, "rfio", "rfio_readdir: reading %d bytes",namlen) ;
memset(de->d_name,'\0',MAXFILENAMSIZE);
/* Directory name is of a small size, so I put RFIO_CTRL_TIMEOUT instead */
/* of RFIO_DATA_TIMEOUT */
if ( netread_timeout(s,de->d_name,namlen,RFIO_CTRL_TIMEOUT) != namlen ) {
TRACE(2,"rfio","rfio_readdir: read(): ERROR occured (errno=%d)", errno);
END_TRACE();
return(NULL) ;
}
/*
* Update the directory offset.
*/
dirp->offset++;
dirp->dp.dd_loc = dirp->offset;
de->d_reclen = sizeof(struct dirent) + namlen;
#if !defined(SOLARIS) && !defined(sgi) && !defined(__linux__)
de->d_namlen = namlen;
#endif
#ifdef SOLARIS
de->d_off = dirp->offset;
#endif
#ifdef _AIX
de->d_offset = dirp->offset;
#endif
} else {
TRACE(2,"rfio","rfio_readdir: no more directory entries");
END_TRACE();
return(NULL);
}
END_TRACE();
return(de);
}
#if !defined(SOLARIS) && !defined(linux)
struct dirent DLL_DECL *rfio_readdir64(dirp)
RDIR *dirp;
{
return (rfio_readdir(dirp));
}
#else
struct dirent64 DLL_DECL *rfio_readdir64(dirp)
RDIR *dirp;
{
struct dirent64 *de;
struct dirent *de32;
ino_t ino;
short namlen;
#if defined(SOLARIS) || defined(__linux__)
off_t offset;
#endif
if ((de32 = rfio_readdir(dirp)) == NULL)
return(NULL);
ino = de32->d_ino;
#if defined(SOLARIS) || defined(__linux__)
offset = de32->d_off;
#endif
namlen = strlen(de32->d_name);
de = (struct dirent64 *) de32;
memmove (de->d_name, de32->d_name, namlen + 1);
de->d_ino = ino;
#if defined(SOLARIS) || defined(__linux__)
de->d_off = offset;
#endif
#if defined(__GNU__) || defined(__FreeBSD_kernel__)
de->d_namlen = namlen;
#endif
de->d_reclen = ((&de->d_name[0] - (char *) de + namlen + 8) / 8) * 8;
return(de);
}
#endif
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