include/linux/vt_kern.h

File Facts

System

Linux kernel

Corpus path

include/linux/vt_kern.h

Extension

.h

Size

5451 bytes

Lines

179

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/vt.h
• linux/kd.h
• linux/tty.h
• linux/mutex.h
• linux/console_struct.h
• linux/mm.h
• linux/consolemap.h
• linux/notifier.h

Detected Declarations

• struct tty_struct
• struct unipair
• struct vt_spawn_console
• struct vt_notifier_param
• function vc_resize
• function con_set_trans_old
• function con_get_trans_old
• function con_set_trans_new
• function con_get_trans_new
• function con_clear_unimap
• function con_set_unimap
• function con_get_unimap
• function con_set_default_unimap
• function con_free_unimap

Annotated Snippet

int vty_init(const struct file_operations *console_fops);

extern bool vt_dont_switch;
extern int default_utf8;
extern int global_cursor_default;

struct vt_spawn_console {
	spinlock_t lock;
	struct pid *pid;
	int sig;
};
extern struct vt_spawn_console vt_spawn_con;

int vt_move_to_console(unsigned int vt, int alloc);

/* Interfaces for VC notification of character events (for accessibility etc) */

struct vt_notifier_param {
	struct vc_data *vc;	/* VC on which the update happened */
	unsigned int c;		/* Printed char */
};

int register_vt_notifier(struct notifier_block *nb);
int unregister_vt_notifier(struct notifier_block *nb);

void hide_boot_cursor(bool hide);

/* keyboard  provided interfaces */
int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm);
int vt_do_kdskbmode(unsigned int console, unsigned int arg);
int vt_do_kdskbmeta(unsigned int console, unsigned int arg);
int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
			  int perm);
int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
		     unsigned int console);
int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm);
int vt_do_kdskled(unsigned int console, int cmd, unsigned long arg, int perm);
int vt_do_kdgkbmode(unsigned int console);
int vt_do_kdgkbmeta(unsigned int console);
void vt_reset_unicode(unsigned int console);
int vt_get_shift_state(void);
void vt_reset_keyboard(unsigned int console);
int vt_get_leds(unsigned int console, int flag);
int vt_get_kbd_mode_bit(unsigned int console, int bit);
void vt_set_kbd_mode_bit(unsigned int console, int bit);
void vt_clr_kbd_mode_bit(unsigned int console, int bit);
void vt_set_led_state(unsigned int console, int leds);
void vt_kbd_con_start(unsigned int console);
void vt_kbd_con_stop(unsigned int console);

#endif /* _VT_KERN_H */

Annotation

• Immediate include surface: `linux/vt.h`, `linux/kd.h`, `linux/tty.h`, `linux/mutex.h`, `linux/console_struct.h`, `linux/mm.h`, `linux/consolemap.h`, `linux/notifier.h`.
• Detected declarations: `struct tty_struct`, `struct unipair`, `struct vt_spawn_console`, `struct vt_notifier_param`, `function vc_resize`, `function con_set_trans_old`, `function con_get_trans_old`, `function con_set_trans_new`, `function con_get_trans_new`, `function con_clear_unimap`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: pattern implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.