16da56ea9b
Includes truncation support in tmpfs, and changes the signure of the VFS open() method. Also tweaked some comment style in the VFS.
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* zero 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_zero(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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uint32_t write_zero(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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void open_zero(fs_node_t *node, unsigned int flags);
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void close_zero(fs_node_t *node);
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uint32_t read_zero(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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memset(buffer, 0x00, size);
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return 1;
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}
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uint32_t write_zero(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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return 0;
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}
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void open_zero(fs_node_t * node, unsigned int flags) {
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return;
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}
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void close_zero(fs_node_t * node) {
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return;
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}
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fs_node_t * zero_device_create() {
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fs_node_t * fnode = malloc(sizeof(fs_node_t));
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memset(fnode, 0x00, sizeof(fs_node_t));
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fnode->inode = 0;
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strcpy(fnode->name, "zero");
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fnode->uid = 0;
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fnode->gid = 0;
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fnode->flags = FS_CHARDEVICE;
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fnode->read = read_zero;
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fnode->write = write_zero;
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fnode->open = open_zero;
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fnode->close = close_zero;
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fnode->readdir = NULL;
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fnode->finddir = NULL;
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fnode->ioctl = NULL;
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return fnode;
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}
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