Merge pull request #4482 from A1029384756/master

core:sys/linux - implemented inotify

core/sys/linux/bits.odin

@@ -519,6 +519,36 @@ Fd_Poll_Events_Bits :: enum {
 	RDHUP  = 13,
 }
 
+Inotify_Init_Bits :: enum {
+	NONBLOCK = 11,
+	CLOEXEC  = 19,
+}
+
+Inotify_Event_Bits :: enum u32 {
+	ACCESS        = 0,
+	MODIFY        = 1,
+	ATTRIB        = 2,
+	CLOSE_WRITE   = 3,
+	CLOSE_NOWRITE = 4,
+	OPEN          = 5,
+	MOVED_FROM    = 6,
+	MOVED_TO      = 7,
+	CREATE        = 8,
+	DELETE        = 9,
+	DELETE_SELF   = 10,
+	MOVE_SELF     = 11,
+	UNMOUNT       = 13,
+	Q_OVERFLOW    = 14,
+	IGNORED       = 15,
+	ONLYDIR       = 24,
+	DONT_FOLLOW   = 25,
+	EXCL_UNLINK   = 26,
+	MASK_CREATE   = 28,
+	MASK_ADD      = 29,
+	ISDIR         = 30,
+	ONESHOT       = 31,
+}
+
 /*
 	Bits for Mem_Protection bitfield
 */

core/sys/linux/constants.odin

@@ -135,6 +135,31 @@ STATX_BASIC_STATS :: Statx_Mask {
 	.BLOCKS,
 }
 
+IN_ALL_EVENTS	:: Inotify_Event_Mask {
+	.ACCESS,
+	.MODIFY,
+	.ATTRIB,
+	.CLOSE_WRITE,
+	.CLOSE_NOWRITE,
+	.OPEN,
+	.MOVED_FROM,
+	.MOVED_TO,
+	.CREATE,
+	.DELETE,
+	.DELETE_SELF,
+	.MOVE_SELF,
+}
+
+IN_CLOSE :: Inotify_Event_Mask {
+	.CLOSE_WRITE,
+	.CLOSE_NOWRITE,
+}
+
+IN_MOVE :: Inotify_Event_Mask {
+	.MOVED_FROM,
+	.MOVED_TO,
+}
+
 /*
 	Tell `shmget` to create a new key
 */

core/sys/linux/sys.odin

@@ -2536,11 +2536,30 @@ waitid :: proc "contextless" (id_type: Id_Type, id: Id, sig_info: ^Sig_Info, opt
 
 // TODO(flysand): ioprio_get
 
-// TODO(flysand): inotify_init
+inotify_init :: proc "contextless" () -> (Fd, Errno) {
+	when ODIN_ARCH == .arm64 || ODIN_ARCH == .riscv64 {
+		ret := syscall(SYS_inotify_init1, 0)
+		return errno_unwrap(ret, Fd)
+	} else {
+		ret := syscall(SYS_inotify_init)
+		return errno_unwrap(ret, Fd)
+	}
+}
 
-// TODO(flysand): inotify_add_watch
+inotify_init1 :: proc "contextless" (flags: Inotify_Init_Flags) -> (Fd, Errno) {
+	ret := syscall(SYS_inotify_init1, transmute(i32)flags)
+	return errno_unwrap(ret, Fd)
+}
 
-// TODO(flysand): inotify_rm_watch
+inotify_add_watch :: proc "contextless" (fd: Fd, pathname: cstring, mask: Inotify_Event_Mask) -> (Wd, Errno) {
+	ret := syscall(SYS_inotify_add_watch, fd, transmute(uintptr) pathname, transmute(u32) mask)
+	return errno_unwrap(ret, Wd)
+}
+
+inotify_rm_watch :: proc "contextless" (fd: Fd, wd: Wd) -> (Errno) {
+	ret := syscall(SYS_inotify_rm_watch, fd, wd)
+	return Errno(-ret)
+}
 
 // TODO(flysand): migrate_pages
 

core/sys/linux/types.odin

@@ -30,6 +30,11 @@ Id :: distinct uint
 */
 Fd  :: distinct i32
 
+/*
+	Represents a watch descriptor.
+*/
+Wd  :: distinct i32
+
 /*
 	Type for PID file descriptors.
 */
@@ -343,6 +348,18 @@ Poll_Fd :: struct {
 	revents: Fd_Poll_Events,
 }
 
+Inotify_Init_Flags :: bit_set[Inotify_Init_Bits; i32]
+
+Inotify_Event :: struct {
+	wd:     Wd,
+	mask:   Inotify_Event_Mask,
+	cookie: u32,
+	len:    u32,
+	name:   [0]u8,
+}
+
+Inotify_Event_Mask :: bit_set[Inotify_Event_Bits; u32]
+
 /*
 	Specifies protection for memory pages.
 */