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/*
* Implements HPUX syscalls.
*
* Copyright (C) 1999 Matthew Wilcox <willy with parisc-linux.org>
* Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
* Copyright (C) 2000 John Marvin <jsm with parisc-linux.org>
* Copyright (C) 2000 Philipp Rumpf
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <asm/errno.h>
#include <asm/uaccess.h>
int hpux_execve(struct pt_regs *regs)
{
return do_execve(getname((const char __user *) regs->gr[26]),
(const char __user *const __user *) regs->gr[25],
(const char __user *const __user *) regs->gr[24]);
}
struct hpux_dirent {
loff_t d_off;
ino_t d_ino;
short d_reclen;
short d_namlen;
char d_name[1];
};
struct getdents_callback {
struct dir_context ctx;
struct hpux_dirent __user *current_dir;
struct hpux_dirent __user *previous;
int count;
int error;
};
#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
static int filldir(struct dir_context *ctx, const char *name, int namlen,
loff_t offset, u64 ino, unsigned d_type)
{
struct hpux_dirent __user * dirent;
struct getdents_callback *buf =
container_of(ctx, struct getdents_callback, ctx);
ino_t d_ino;
int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, sizeof(long));
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
return -EINVAL;
d_ino = ino;
if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
buf->error = -EOVERFLOW;
return -EOVERFLOW;
}
dirent = buf->previous;
if (dirent)
if (put_user(offset, &dirent->d_off))
goto Efault;
dirent = buf->current_dir;
if (put_user(d_ino, &dirent->d_ino) ||
put_user(reclen, &dirent->d_reclen) ||
put_user(namlen, &dirent->d_namlen) ||
copy_to_user(dirent->d_name, name, namlen) ||
put_user(0, dirent->d_name + namlen))
goto Efault;
buf->previous = dirent;
buf->current_dir = (void __user *)dirent + reclen;
buf->count -= reclen;
return 0;
Efault:
buf->error = -EFAULT;
return -EFAULT;
}
#undef NAME_OFFSET
int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
{
struct fd arg;
struct hpux_dirent __user * lastdirent;
struct getdents_callback buf = {
.ctx.actor = filldir,
.current_dir = dirent,
.count = count
};
int error;
arg = fdget(fd);
if (!arg.file)
return -EBADF;
error = iterate_dir(arg.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
if (put_user(buf.ctx.pos, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
fdput(arg);
return error;
}
int hpux_mount(const char *fs, const char *path, int mflag,
const char *fstype, const char *dataptr, int datalen)
{
return -ENOSYS;
}
static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
{
struct hpux_stat64 tmp;
/* we probably want a different split here - is hpux 12:20? */
if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
return -EOVERFLOW;
memset(&tmp, 0, sizeof(tmp));
tmp.st_dev = new_encode_dev(stat->dev);
tmp.st_ino = stat->ino;
tmp.st_mode = stat->mode;
tmp.st_nlink = stat->nlink;
tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
tmp.st_rdev = new_encode_dev(stat->rdev);
tmp.st_size = stat->size;
tmp.st_atime = stat->atime.tv_sec;
tmp.st_mtime = stat->mtime.tv_sec;
tmp.st_ctime = stat->ctime.tv_sec;
tmp.st_blocks = stat->blocks;
tmp.st_blksize = stat->blksize;
return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}
long hpux_stat64(const char __user *filename, struct hpux_stat64 __user *statbuf)
{
struct kstat stat;
int error = vfs_stat(filename, &stat);
if (!error)
error = cp_hpux_stat(&stat, statbuf);
return error;
}
long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
{
struct kstat stat;
int error = vfs_fstat(fd, &stat);
if (!error)
error = cp_hpux_stat(&stat, statbuf);
return error;
}
long hpux_lstat64(const char __user *filename,
struct hpux_stat64 __user *statbuf)
{
struct kstat stat;
int error = vfs_lstat(filename, &stat);
if (!error)
error = cp_hpux_stat(&stat, statbuf);
return error;
}
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