fs/umsdos/file.c

/* */
This source file includes following definitions.
UMSDOS_file_read
UMSDOS_file_write
UMSDOS_truncate
   1 /*
   2  *  linux/fs/umsdos/file.c
   3  *
   4  *  Written 1993 by Jacques Gelinas
   5  *      inspired from linux/fs/msdos/file.c Werner Almesberger
   6  *
   7  *  Extended MS-DOS regular file handling primitives
   8  */
   9 
  10 #include <asm/segment.h>
  11 #include <asm/system.h>
  12 
  13 #include <linux/sched.h>
  14 #include <linux/fs.h>
  15 #include <linux/msdos_fs.h>
  16 #include <linux/errno.h>
  17 #include <linux/fcntl.h>
  18 #include <linux/stat.h>
  19 #include <linux/msdos_fs.h>
  20 #include <linux/umsdos_fs.h>
  21 
  22 
  23 #define PRINTK(x)
  24 #define Printk(x)       printk x
  25 /*
  26         Read a file into user space memory
  27 */
  28 static int UMSDOS_file_read(
     /*  */
  29         struct inode *inode,
  30         struct file *filp,
  31         char *buf,
  32     int count)
  33 {
  34         /* We have to set the access time because msdos don't care */
  35         int ret = msdos_file_read(inode,filp,buf,count);
  36         inode->i_atime = CURRENT_TIME;
  37         inode->i_dirt = 1;
  38         return ret;
  39 }
  40 /*
  41         Write a file from user space memory
  42 */
  43 static int UMSDOS_file_write(
     /*  */
  44         struct inode *inode,
  45         struct file *filp,
  46         char *buf,
  47     int count)
  48 {
  49         return msdos_file_write(inode,filp,buf,count);
  50 }
  51 /*
  52         Truncate a file to 0 length.
  53 */
  54 static void UMSDOS_truncate(struct inode *inode)
     /*  */
  55 {
  56         PRINTK (("UMSDOS_truncate\n"));
  57         msdos_truncate (inode);
  58         inode->i_ctime = inode->i_mtime = CURRENT_TIME;
  59         inode->i_dirt = 1;
  60 }
  61 /*
  62         See inode.c
  63         
  64         Some entry point are filled dynamically with function pointers
  65         from the msdos file_operations and file_inode_operations.
  66         
  67         The idea is to have the code as independent as possible from
  68         the msdos file system.
  69 */
  70 
  71 struct file_operations umsdos_file_operations = {
  72         NULL,                           /* lseek - default */
  73         UMSDOS_file_read,       /* read */
  74         UMSDOS_file_write,      /* write */
  75         NULL,                           /* readdir - bad */
  76         NULL,                           /* select - default */
  77         NULL,                           /* ioctl - default */
  78         msdos_mmap,                     /* mmap */
  79         NULL,                           /* no special open is needed */
  80         NULL,                           /* release */
  81         NULL                            /* fsync */
  82 };
  83 
  84 struct inode_operations umsdos_file_inode_operations = {
  85         &umsdos_file_operations,        /* default file operations */
  86         NULL,                   /* create */
  87         NULL,                   /* lookup */
  88         NULL,                   /* link */
  89         NULL,                   /* unlink */
  90         NULL,                   /* symlink */
  91         NULL,                   /* mkdir */
  92         NULL,                   /* rmdir */
  93         NULL,                   /* mknod */
  94         NULL,                   /* rename */
  95         NULL,                   /* readlink */
  96         NULL,                   /* follow_link */
  97         NULL,                   /* bmap */
  98         UMSDOS_truncate,/* truncate */
  99         NULL,                   /* permission */
 100         msdos_smap              /* smap */
 101 };
 102 
 103
/* */
root/fs/umsdos/file.c

DEFINITIONS
