16da56ea9b
Includes truncation support in tmpfs, and changes the signure of the VFS open() method. Also tweaked some comment style in the VFS.
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
|
|
* Null Device
|
|
*/
|
|
|
|
#include <system.h>
|
|
#include <fs.h>
|
|
|
|
uint32_t read_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
|
|
uint32_t write_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
|
|
void open_null(fs_node_t *node, unsigned int flags);
|
|
void close_null(fs_node_t *node);
|
|
|
|
uint32_t read_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
|
|
return 0;
|
|
}
|
|
|
|
uint32_t write_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
|
|
return 0;
|
|
}
|
|
|
|
void open_null(fs_node_t * node, unsigned int flags) {
|
|
return;
|
|
}
|
|
|
|
void close_null(fs_node_t * node) {
|
|
return;
|
|
}
|
|
|
|
fs_node_t * null_device_create() {
|
|
fs_node_t * fnode = malloc(sizeof(fs_node_t));
|
|
memset(fnode, 0x00, sizeof(fs_node_t));
|
|
fnode->inode = 0;
|
|
strcpy(fnode->name, "null");
|
|
fnode->uid = 0;
|
|
fnode->gid = 0;
|
|
fnode->flags = FS_CHARDEVICE;
|
|
fnode->read = read_null;
|
|
fnode->write = write_null;
|
|
fnode->open = open_null;
|
|
fnode->close = close_null;
|
|
fnode->readdir = NULL;
|
|
fnode->finddir = NULL;
|
|
fnode->ioctl = NULL;
|
|
return fnode;
|
|
}
|