patch-2.2.11 linux/drivers/char/mem.c

• Lines: 55
• Date: Mon Aug 9 12:04:57 1999
• Orig file: v2.2.10/linux/drivers/char/mem.c
• Orig date: Mon May 10 10:18:34 1999

diff -u --recursive --new-file v2.2.10/linux/drivers/char/mem.c linux/drivers/char/mem.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/joystick.h>
 #include <linux/i2c.h>
+#include <linux/capability.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -464,11 +465,19 @@
 	}
 }
 
+static int open_port(struct inode * inode, struct file * filp)
+{
+	return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+}
+
+
 #define mmap_kmem	mmap_mem
 #define zero_lseek	null_lseek
 #define full_lseek      null_lseek
 #define write_zero	write_null
 #define read_full       read_zero
+#define open_mem	open_port	/* different capability? */
+#define open_kmem	open_mem
 
 static struct file_operations mem_fops = {
 	memory_lseek,
@@ -478,7 +487,7 @@
 	NULL,		/* mem_poll */
 	NULL,		/* mem_ioctl */
 	mmap_mem,
-	NULL,		/* no special open code */
+	open_mem,
 	NULL,		/* flush */
 	NULL,		/* no special release code */
 	NULL		/* fsync */
@@ -492,7 +501,7 @@
 	NULL,		/* kmem_poll */
 	NULL,		/* kmem_ioctl */
 	mmap_kmem,
-	NULL,		/* no special open code */
+	open_kmem,
 	NULL,		/* flush */
 	NULL,		/* no special release code */
 	NULL		/* fsync */
@@ -520,7 +529,7 @@
 	NULL,		/* port_poll */
 	NULL,		/* port_ioctl */
 	NULL,		/* port_mmap */
-	NULL,		/* no special open code */
+	open_port,
 	NULL,		/* flush */
 	NULL,		/* no special release code */
 	NULL		/* fsync */