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