patch-1.3.30 linux/drivers/char/mem.c

• Lines: 74
• Date: Mon Sep 25 08:19:08 1995
• Orig file: v1.3.29/linux/drivers/char/mem.c
• Orig date: Sun Sep 3 12:26:52 1995

diff -u --recursive --new-file v1.3.29/linux/drivers/char/mem.c linux/drivers/char/mem.c
@@ -16,6 +16,7 @@
 #include <linux/malloc.h>
 #include <linux/mman.h>
 #include <linux/mm.h>
+#include <linux/random.h>
 
 #include <asm/segment.h>
 #include <asm/io.h>
@@ -226,6 +227,7 @@
 #define mmap_kmem	mmap_mem
 #define zero_lseek	null_lseek
 #define write_zero	write_null
+#define write_random	write_null
 
 static struct file_operations ram_fops = {
 	memory_lseek,
@@ -316,6 +318,32 @@
 	NULL		/* no special release code */
 };
 
+#ifdef CONFIG_RANDOM
+static struct file_operations random_fops = {
+	memory_lseek,
+	read_random,
+	write_random,
+	NULL,		/* full_readdir */
+	NULL,		/* full_select */
+	NULL,		/* full_ioctl */	
+	NULL,		/* full_mmap */
+	NULL,		/* no special open code */
+	NULL		/* no special release code */
+};
+
+static struct file_operations urandom_fops = {
+	memory_lseek,
+	read_random_unlimited,
+	write_random,
+	NULL,		/* full_readdir */
+	NULL,		/* full_select */
+	NULL,		/* full_ioctl */	
+	NULL,		/* full_mmap */
+	NULL,		/* no special open code */
+	NULL		/* no special release code */
+};
+#endif
+
 static int memory_open(struct inode * inode, struct file * filp)
 {
 	switch (MINOR(inode->i_rdev)) {
@@ -340,6 +368,14 @@
 		case 7:
 			filp->f_op = &full_fops;
 			break;
+#ifdef CONFIG_RANDOM
+		case 8:
+			filp->f_op = &random_fops;
+			break;
+		case 9:
+			filp->f_op = &urandom_fops;
+			break;
+#endif
 		default:
 			return -ENODEV;
 	}
@@ -369,6 +405,9 @@
 {
 	if (register_chrdev(MEM_MAJOR,"mem",&memory_fops))
 		printk("unable to get major %d for memory devs\n", MEM_MAJOR);
+#ifdef CONFIG_RANDOM
+	rand_initialize();
+#endif
 	mem_start = tty_init(mem_start);
 #ifdef CONFIG_PRINTER
 	mem_start = lp_init(mem_start);