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/*
* linux/ibcs/stat.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* Hacked by Eric Youngdale for iBCS.
* Added to by Drew Sullivan.
*
* $Id: stat.c,v 1.12 1997/05/12 23:13:40 jaggy Exp $
* $Source: /usr/CVS/ibcs/iBCSemul/stat.c,v $
*/
#define __KERNEL__ 1
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <asm/segment.h>
#ifndef KERNEL_DS
#include <linux/segment.h>
#endif
#include <linux/errno.h>
#include <linux/stat.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <ibcs/ibcs.h>
#ifdef __sparc__
static void cp_ibcs_stat(struct inode * inode, struct ibcs_stat * statbuf)
{
struct ibcs_stat tmp;
memset ((void *) &tmp, 0, sizeof (tmp));
tmp.st_dev = inode->i_dev;
tmp.st_ino = inode->i_ino;
tmp.st_mode = inode->i_mode;
tmp.st_nlink = inode->i_nlink;
tmp.st_uid = inode->i_uid;
tmp.st_gid = inode->i_gid;
tmp.st_rdev = inode->i_rdev;
tmp.st_size = inode->i_size;
tmp.st_atime.tv_sec = inode->i_atime;
tmp.st_mtime.tv_sec = inode->i_mtime;
tmp.st_ctime.tv_sec = inode->i_ctime;
tmp.st_blksize = inode->i_blksize;
tmp.st_blocks = inode->i_blocks;
memcpy_tofs(statbuf,&tmp,sizeof(tmp));
}
#else /* if not sparc... */
/*
* Believe it or not, the original stat structure is compatible with ibcs2.
* The xstat struct used by SVr4 is different than our new struct, but we will
* deal with that later
*/
static void cp_ibcs_stat(struct inode * inode, struct ibcs_stat * statbuf)
{
struct ibcs_stat tmp;
/* Note that we have to fold a long inode number down to a short.
* This must match what happens in coff:ibcs_read() and
* open.c:ibcs_getdents() since code that figures out cwd needs
* the inodes to match. Because it must match read() on a
* directory we have to avoid the situation where we end up
* with a zero inode value. A zero inode value in a read()
* on a directory indicates an empty directory slot.
*/
if ((unsigned long)inode->i_ino & 0xffff)
tmp.st_ino = (unsigned long)inode->i_ino & 0xffff;
else
tmp.st_ino = 0xfffe;
tmp.st_dev = inode->i_dev;
tmp.st_mode = inode->i_mode;
tmp.st_nlink = inode->i_nlink;
tmp.st_uid = inode->i_uid;
tmp.st_gid = inode->i_gid;
tmp.st_rdev = inode->i_rdev;
tmp.st_size = inode->i_size;
tmp.st_atime = inode->i_atime;
tmp.st_mtime = inode->i_mtime;
tmp.st_ctime = inode->i_ctime;
memcpy_tofs(statbuf,&tmp,sizeof(tmp));
}
#endif /* not sparc */
#ifdef __cplusplus
extern "C"
#endif
int ibcs_stat(char * filename, struct ibcs_stat * statbuf)
{
struct inode * inode;
int error;
error = verify_area(VERIFY_WRITE,statbuf,sizeof (*statbuf));
if (error)
return error;
error = namei(filename,&inode);
if (error)
return error;
cp_ibcs_stat(inode,statbuf);
iput(inode);
return 0;
}
#ifdef __cplusplus
extern "C"
#endif
int ibcs_lstat(char * filename, struct ibcs_stat * statbuf)
{
struct inode * inode;
int error;
error = verify_area(VERIFY_WRITE,statbuf,sizeof (*statbuf));
if (error)
return error;
error = lnamei(filename,&inode);
if (error)
return error;
cp_ibcs_stat(inode,statbuf);
iput(inode);
return 0;
}
#ifdef __cplusplus
extern "C"
#endif
int ibcs_fstat(unsigned int fd, struct ibcs_stat * statbuf)
{
struct file * f;
struct inode * inode;
int error;
error = verify_area(VERIFY_WRITE,statbuf,sizeof (*statbuf));
if (error)
return error;
if (fd >= NR_OPEN || !(f=current->FD[fd]) || !(inode=f->f_inode))
return -EBADF;
cp_ibcs_stat(inode,statbuf);
return 0;
}
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