patch-2.3.27 linux/fs/proc/sysvipc.c

• Lines: 142
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.26/linux/fs/proc/sysvipc.c
• Orig date: Sat Jun 26 12:04:40 1999

diff -u --recursive --new-file v2.3.26/linux/fs/proc/sysvipc.c linux/fs/proc/sysvipc.c
@@ -1,141 +0,0 @@
-/*
- *  linux/fs/proc/sysvipc.c
- *
- *  Copyright (c) 1999 Dragos Acostachioaie
- *
- *  This code is derived from linux/fs/proc/generic.c,
- *  which is Copyright (C) 1991, 1992 Linus Torvalds.
- *
- *  /proc/sysvipc directory handling functions
- */
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/mm.h>
-
-#include <asm/uaccess.h>
-
-#ifndef MIN
-#define MIN(a,b) (((a) < (b)) ? (a) : (b))
-#endif
-
-/* 4K page size but our output routines use some slack for overruns */
-#define PROC_BLOCK_SIZE	(3*1024)
-
-static ssize_t
-proc_sysvipc_read(struct file * file, char * buf, size_t nbytes, loff_t *ppos)
-{
-	struct inode * inode = file->f_dentry->d_inode;
-	char 	*page;
-	ssize_t	retval=0;
-	int	eof=0;
-	ssize_t	n, count;
-	char	*start;
-	struct proc_dir_entry * dp;
-
-	dp = (struct proc_dir_entry *) inode->u.generic_ip;
-	if (!(page = (char*) __get_free_page(GFP_KERNEL)))
-		return -ENOMEM;
-
-	while ((nbytes > 0) && !eof)
-	{
-		count = MIN(PROC_BLOCK_SIZE, nbytes);
-
-		start = NULL;
-		if (dp->get_info) {
-			/*
-			 * Handle backwards compatibility with the old net
-			 * routines.
-			 * 
-			 * XXX What gives with the file->f_flags & O_ACCMODE
-			 * test?  Seems stupid to me....
-			 */
-			n = dp->get_info(page, &start, *ppos, count,
-				 (file->f_flags & O_ACCMODE) == O_RDWR);
-			if (n < count)
-				eof = 1;
-		} else if (dp->read_proc) {
-			n = dp->read_proc(page, &start, *ppos,
-					  count, &eof, dp->data);
-		} else
-			break;
-			
-		if (!start) {
-			/*
-			 * For proc files that are less than 4k
-			 */
-			start = page + *ppos;
-			n -= *ppos;
-			if (n <= 0)
-				break;
-			if (n > count)
-				n = count;
-		}
-		if (n == 0)
-			break;	/* End of file */
-		if (n < 0) {
-			if (retval == 0)
-				retval = n;
-			break;
-		}
-		
-		/* This is a hack to allow mangling of file pos independent
- 		 * of actual bytes read.  Simply place the data at page,
- 		 * return the bytes, and set `start' to the desired offset
- 		 * as an unsigned int. - Paul.Russell@rustcorp.com.au
-		 */
- 		n -= copy_to_user(buf, start < page ? page : start, n);
-		if (n == 0) {
-			if (retval == 0)
-				retval = -EFAULT;
-			break;
-		}
-
-		*ppos += start < page ? (long)start : n; /* Move down the file */
-		nbytes -= n;
-		buf += n;
-		retval += n;
-	}
-	free_page((unsigned long) page);
-	return retval;
-}
-
-static struct file_operations proc_sysvipc_operations = {
-    NULL,		/* lseek   */
-    proc_sysvipc_read,	/* read	   */
-    NULL,		/* write   */
-    NULL,		/* readdir */
-    NULL,		/* poll    */
-    NULL,		/* ioctl   */
-    NULL,		/* mmap	   */
-    NULL,		/* no special open code	   */
-    NULL,		/* no special release code */
-    NULL		/* can't fsync */
-};
-
-/*
- * proc directories can do almost nothing..
- */
-struct inode_operations proc_sysvipc_inode_operations = {
-	&proc_sysvipc_operations, /* default net file-ops */
-	NULL,			/* create */
-	NULL,			/* lookup */
-	NULL,			/* link */
-	NULL,			/* unlink */
-	NULL,			/* symlink */
-	NULL,			/* mkdir */
-	NULL,			/* rmdir */
-	NULL,			/* mknod */
-	NULL,			/* rename */
-	NULL,			/* readlink */
-	NULL,			/* follow_link */
-	NULL,			/* get_block */
-	NULL,			/* readpage */
-	NULL,			/* writepage */
-	NULL,			/* flushpage */
-	NULL,			/* truncate */
-	NULL,			/* permission */
-	NULL,			/* smap */
-	NULL			/* revalidate */
-};