std: add FreeBSD's procctl api.

lib/std/c/freebsd.zig

@@ -202,6 +202,8 @@ pub const clock_t = isize;
 pub const socklen_t = u32;
 pub const suseconds_t = c_long;
 
+pub const id_t = i64;
+
 /// Renamed from `kevent` to `Kevent` to avoid conflict with function name.
 pub const Kevent = extern struct {
     /// Identifier for this event.
@@ -1947,3 +1949,128 @@ pub const MFD = struct {
 
 pub extern "c" fn memfd_create(name: [*:0]const u8, flags: c_uint) c_int;
 pub extern "c" fn copy_file_range(fd_in: fd_t, off_in: ?*off_t, fd_out: fd_t, off_out: ?*off_t, len: usize, flags: u32) usize;
+
+pub const idtype_t = enum(c_int) {
+    P_PID = 0,
+    P_PPID = 1,
+    P_PGID = 2,
+    P_SID = 3,
+    P_CID = 4,
+    P_UID = 5,
+    P_GID = 6,
+    P_ALL = 7,
+    P_LWPID = 8,
+    P_TASKID = 9,
+    P_PROJID = 10,
+    P_POOLID = 11,
+    P_JAILID = 12,
+    P_CTID = 13,
+    P_CPUID = 14,
+    P_PSETID = 15,
+};
+
+pub const PROC = struct {
+    // constants for the id_t argument
+    pub const SPROTECT: id_t = 1;
+    pub const REAP_ACQUIRE: id_t = 2;
+    pub const REAP_RELEASE: id_t = 3;
+    pub const REAP_STATUS: id_t = 4;
+    pub const REAP_GETPIDS: id_t = 5;
+    pub const REAP_KILL: id_t = 6;
+    pub const TRACE_CTL: id_t = 7;
+    pub const TRACE_STATUS: id_t = 8;
+    pub const TRACECAP_CTL = 9;
+    pub const TRACECAP_STATUS: id_t = 10;
+    pub const PDEATHSIG_CTL: id_t = 11;
+    pub const PDEATHSIG_STATUS: id_t = 12;
+    pub const ASLR_CTL: id_t = 13;
+    pub const ASLR_STATUS: id_t = 14;
+    pub const PROTMAX_CTL: id_t = 15;
+    pub const PROTMAX_STATUS: id_t = 16;
+    pub const STACKGAP_CTL: id_t = 17;
+    pub const STACKGAP_STATUS: id_t = 18;
+    pub const NO_NEW_PRIVS_CTL: id_t = 19;
+    pub const NO_NEW_PRIVS_STATUS: id_t = 20;
+    pub const WXMAP_CTL: id_t = 21;
+    pub const WXMAP_STATUS: id_t = 22;
+
+    // constants for the operations
+    pub const TRACE_CTL_ENABLE = 1;
+    pub const TRACE_CTL_DISABLE = 2;
+    pub const TRACE_CTL_DISABLE_EXEC = 3;
+    pub const TRAPCAP_CTL_ENABLE = 1;
+    pub const TRAPCAP_CTL_DISABLE = 2;
+    pub const ASLR_FORCE_ENABLE = 1;
+    pub const ASLR_FORCE_DISABLE = 2;
+    pub const ASLR_FORCE_NOFORCE = 3;
+    pub const ASLR_FORCE_ACTIVE = 0x80000000;
+    pub const PROTMAX_FORCE_ENABLE = 1;
+    pub const PROTMAX_FORCE_DISABLE = 2;
+    pub const PROTMAX_FORCE_NOFORCE = 3;
+    pub const PROTMAX_FORCE_ACTIVE = 0x80000000;
+    pub const STACKGAP_ENABLE = 0x0001;
+    pub const STACKGAP_DISABLE = 0x0002;
+    pub const STACKGAP_ENABLE_EXEC = 0x0004;
+    pub const STACKGAP_DISABLE_EXEC = 0x0008;
+    pub const NO_NEW_PRIVS_ENABLE = 1;
+    pub const NO_NEW_PRIVS_DISABLE = 2;
+    pub const WX_MAPPINGS_PERMIT = 0x0001;
+    pub const WX_MAPPINGS_DISALLOW_EXEC = 0x0002;
+    pub const WX_MAPPINGS_ENFORCE = 0x80000000;
+};
+
+pub const PPROT = struct {
+    pub fn OP(x: i32) i32 {
+        return x & 0xf;
+    }
+    pub const SET = 1;
+    pub const CLEAR = 2;
+    pub fn FLAGS(x: i32) i32 {
+        return x & !0xf;
+    }
+    pub const DESCEND = 0x10;
+    pub const INHERIT = 0x20;
+};
+
+pub const REAPER = struct {
+    pub const STATUS_OWNED = 0x00000001;
+    pub const STATUS_REALINIT = 0x00000002;
+    pub const PIDINFO_VALID = 0x00000001;
+    pub const PIDINFO_CHILD = 0x00000002;
+    pub const PIDINFO_REAPER = 0x00000004;
+    pub const KILL_CHILDREN = 0x00000001;
+    pub const KILL_SUBTREE = 0x00000002;
+};
+
+pub const procctl_reaper_status = extern struct {
+    rs_flags: u32,
+    rs_children: u32,
+    rs_descendants: u32,
+    rs_reaper: pid_t,
+    rs_pid: pid_t,
+    rs_pad0: [15]u32,
+};
+
+pub const procctl_reaper_pidinfo = extern struct {
+    pi_pid: pid_t,
+    pi_subtree: pid_t,
+    pi_flags: u32,
+    pi_pad0: [15]u32,
+};
+
+pub const procctl_reaper_pids = extern struct {
+    rp_count: u32,
+    rp_pad0: [15]u32,
+    rp_pids: [*]procctl_reaper_pidinfo,
+};
+
+pub const procctl_reaper_kill = extern struct {
+    rk_sig: c_int,
+    rk_flags: u32,
+    rk_subtree: pid_t,
+    rk_killed: u32,
+    rk_fpid: pid_t,
+    rk_pad0: [15]u32,
+};
+
+pub extern "c" fn procctl(idtype: idtype_t, id: id_t, cmd: c_int, data: ?*anyopaque) c_int;