[sys/linux] Change flags parameter of execveat to bit_set

core/sys/linux/bits.odin

@@ -1756,3 +1756,11 @@ EPoll_Ctl_Opcode :: enum i32 {
 	DEL = 2,
 	MOD = 3,
 }
+
+/*
+	Bits for execveat(2) flags.
+*/
+Execveat_Flags_Bits :: enum {
+	AT_SYMLINK_NOFOLLOW = 8,
+	AT_EMPTY_PATH       = 12,
+}

core/sys/linux/constants.odin

@@ -5,8 +5,6 @@ package linux
 	that relative paths are relative to current directory.
 */
 AT_FDCWD :: Fd(-100)
-AT_EMPTY_PATH :: 0x1000
-AT_SYMLINK_NOFOLLOW :: 0x100
 
 /*
 	Special value to put into timespec for utimensat() to set timestamp to the current time.

core/sys/linux/sys.odin

@@ -783,7 +783,7 @@ execve :: proc "contextless" (name: cstring, argv: [^]cstring, envp: [^]cstring)
 		ret := syscall(SYS_execve, cast(rawptr) name, cast(rawptr) argv, cast(rawptr) envp)
 		return Errno(-ret)
 	} else {
-		return execveat(AT_FDCWD, name, argv, envp, 0)
+		return execveat(AT_FDCWD, name, argv, envp, nil)
 	}
 }
 
@@ -2816,8 +2816,8 @@ getrandom :: proc "contextless" (buf: []u8, flags: Get_Random_Flags) -> (int, Er
 	Execute program relative to a directory file descriptor.
 	Available since Linux 3.19.
 */
-execveat :: proc "contextless" (dirfd: Fd, name: cstring, argv: [^]cstring, envp: [^]cstring, flags: i32) -> (Errno) {
-	ret := syscall(SYS_execveat, dirfd, cast(rawptr) name, cast(rawptr) argv, cast(rawptr) envp, flags)
+execveat :: proc "contextless" (dirfd: Fd, name: cstring, argv: [^]cstring, envp: [^]cstring, flags: Execveat_Flags) -> (Errno) {
+	ret := syscall(SYS_execveat, dirfd, cast(rawptr) name, cast(rawptr) argv, cast(rawptr) envp, transmute(i32) flags)
 	return Errno(-ret)
 }
 

core/sys/linux/types.odin

@@ -1238,3 +1238,8 @@ EPoll_Event :: struct #packed {
 	events: EPoll_Event_Kind,
 	data:   EPoll_Data,
 }
+
+/*
+	Flags for execveat(2) syscall.
+*/
+Execveat_Flags :: bit_set[Execveat_Flags_Bits; i32]