arch/parisc/hpux/fs.c

   1 /*
   2  *    Implements HPUX syscalls.
   3  *
   4  *    Copyright (C) 1999 Matthew Wilcox <willy with parisc-linux.org>
   5  *    Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
   6  *    Copyright (C) 2000 John Marvin <jsm with parisc-linux.org>
   7  *    Copyright (C) 2000 Philipp Rumpf
   8  *
   9  *    This program is free software; you can redistribute it and/or modify
  10  *    it under the terms of the GNU General Public License as published by
  11  *    the Free Software Foundation; either version 2 of the License, or
  12  *    (at your option) any later version.
  13  *
  14  *    This program is distributed in the hope that it will be useful,
  15  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *    GNU General Public License for more details.
  18  *
  19  *    You should have received a copy of the GNU General Public License
  20  *    along with this program; if not, write to the Free Software
  21  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include <linux/mm.h>
  25 #include <linux/sched.h>
  26 #include <linux/file.h>
  27 #include <linux/smp_lock.h>
  28 #include <linux/slab.h>
  29 #include <linux/ptrace.h>
  30 #include <asm/errno.h>
  31 #include <asm/uaccess.h>
  32
  33 int hpux_execve(struct pt_regs *regs)
  34 {
  35         int error;
  36         char *filename;
  37
  38         filename = getname((char *) regs->gr[26]);
  39         error = PTR_ERR(filename);
  40         if (IS_ERR(filename))
  41                 goto out;
  42
  43         error = do_execve(filename, (char **) regs->gr[25],
  44                 (char **)regs->gr[24], regs);
  45
  46         if (error == 0) {
  47                 task_lock(current);
  48                 current->ptrace &= ~PT_DTRACE;
  49                 task_unlock(current);
  50         }
  51         putname(filename);
  52
  53 out:
  54         return error;
  55 }
  56
  57 struct hpux_dirent {
  58         loff_t  d_off;
  59         ino_t   d_ino;
  60         short   d_reclen;
  61         short   d_namlen;
  62         char    d_name[1];
  63 };
  64
  65 struct getdents_callback {
  66         struct hpux_dirent *current_dir;
  67         struct hpux_dirent *previous;
  68         int count;
  69         int error;
  70 };
  71
  72 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
  73 #define ROUND_UP(x) (((x)+sizeof(long)-1) & ~(sizeof(long)-1))
  74
  75 static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
  76                 ino_t ino, unsigned d_type)
  77 {
  78         struct hpux_dirent * dirent;
  79         struct getdents_callback * buf = (struct getdents_callback *) __buf;
  80         int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
  81
  82         buf->error = -EINVAL;   /* only used if we fail.. */
  83         if (reclen > buf->count)
  84                 return -EINVAL;
  85         dirent = buf->previous;
  86         if (dirent)
  87                 put_user(offset, &dirent->d_off);
  88         dirent = buf->current_dir;
  89         buf->previous = dirent;
  90         put_user(ino, &dirent->d_ino);
  91         put_user(reclen, &dirent->d_reclen);
  92         put_user(namlen, &dirent->d_namlen);
  93         copy_to_user(dirent->d_name, name, namlen);
  94         put_user(0, dirent->d_name + namlen);
  95         ((char *) dirent) += reclen;
  96         buf->current_dir = dirent;
  97         buf->count -= reclen;
  98         return 0;
  99 }
 100
 101 #undef NAME_OFFSET
 102 #undef ROUND_UP
 103
 104 int hpux_getdents(unsigned int fd, struct hpux_dirent *dirent, unsigned int count)
 105 {
 106         struct file * file;
 107         struct hpux_dirent * lastdirent;
 108         struct getdents_callback buf;
 109         int error = -EBADF;
 110
 111         file = fget(fd);
 112         if (!file)
 113                 goto out;
 114
 115         buf.current_dir = dirent;
 116         buf.previous = NULL;
 117         buf.count = count;
 118         buf.error = 0;
 119
 120         error = vfs_readdir(file, filldir, &buf);
 121         if (error < 0)
 122                 goto out_putf;
 123         error = buf.error;
 124         lastdirent = buf.previous;
 125         if (lastdirent) {
 126                 put_user(file->f_pos, &lastdirent->d_off);
 127                 error = count - buf.count;
 128         }
 129
 130 out_putf:
 131         fput(file);
 132 out:
 133         return error;
 134 }
 135
 136 int hpux_mount(const char *fs, const char *path, int mflag,
 137                 const char *fstype, const char *dataptr, int datalen)
 138 {
 139         return -ENOSYS;
 140 }
 141
 142 static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 *statbuf)
 143 {
 144         struct hpux_stat64 tmp;
 145
 146         /* we probably want a different split here - is hpux 12:20? */
 147
 148         if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
 149                 return -EOVERFLOW;
 150
 151         memset(&tmp, 0, sizeof(tmp));
 152         tmp.st_dev = new_encode_dev(stat->dev);
 153         tmp.st_ino = stat->ino;
 154         tmp.st_mode = stat->mode;
 155         tmp.st_nlink = stat->nlink;
 156         tmp.st_uid = stat->uid;
 157         tmp.st_gid = stat->gid;
 158         tmp.st_rdev = new_encode_dev(stat->rdev);
 159         tmp.st_size = stat->size;
 160         tmp.st_atime = stat->atime.tv_sec;
 161         tmp.st_mtime = stat->mtime.tv_sec;
 162         tmp.st_ctime = stat->ctime.tv_sec;
 163         tmp.st_blocks = stat->blocks;
 164         tmp.st_blksize = stat->blksize;
 165         return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
 166 }
 167
 168 long hpux_stat64(char *filename, struct hpux_stat64 *statbuf)
 169 {
 170         struct kstat stat;
 171         int error = vfs_stat(filename, &stat);
 172
 173         if (!error)
 174                 error = cp_hpux_stat(&stat, statbuf);
 175
 176         return error;
 177 }
 178
 179 long hpux_fstat64(unsigned int fd, struct hpux_stat64 *statbuf)
 180 {
 181         struct kstat stat;
 182         int error = vfs_fstat(fd, &stat);
 183
 184         if (!error)
 185                 error = cp_hpux_stat(&stat, statbuf);
 186
 187         return error;
 188 }
 189
 190 long hpux_lstat64(char *filename, struct hpux_stat64 *statbuf)
 191 {
 192         struct kstat stat;
 193         int error = vfs_lstat(filename, &stat);
 194
 195         if (!error)
 196                 error = cp_hpux_stat(&stat, statbuf);
 197
 198         return error;
 199 }