52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* Null Device
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*/
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#include <system.h>
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#include <fs.h>
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uint32_t read_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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uint32_t write_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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void open_null(fs_node_t *node, uint8_t read, uint8_t write);
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void close_null(fs_node_t *node);
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uint32_t read_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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if (size < 1) {
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return 0;
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}
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memset(buffer, 0x00, 1);
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return 1;
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}
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uint32_t write_null(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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return size;
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}
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void open_null(fs_node_t * node, uint8_t read, uint8_t write) {
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return;
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}
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void close_null(fs_node_t * node) {
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return;
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}
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fs_node_t * null_device_create() {
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fs_node_t * fnode = malloc(sizeof(fnode));
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fnode->inode = 0;
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fnode->name[0] = 'n';
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fnode->name[1] = 'u';
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fnode->name[2] = 'l';
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fnode->name[3] = 'l';
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fnode->name[4] = '\0';
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fnode->uid = 0;
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fnode->gid = 0;
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fnode->flags = 0;
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fnode->read = read_null;
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fnode->write = write_null;
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fnode->open = open_null;
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fnode->close = close_null;
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fnode->readdir = NULL;
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fnode->finddir = NULL;
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return fnode;
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}
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