motiejus/zig

commit 35e3069ab7af0a5fd65c5fe8e35b01458dbcb132 (tree)
parent c9d763502fb1ff9ee76f0745c493e65c1333b1b1
Author: Jakub Konka <kubkon@jakubkonka.com>
Date:   Sat, 10 Dec 2022 23:36:36 +0100

darwin: expose ptrace with errno handling

Diffstat:
M
lib/std/os.zig
 | 
1
+
A
lib/std/os/ptrace.zig
 | 
28
++++++++++++++++++++++++++++

2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/lib/std/os.zig b/lib/std/os.zig
@@ -42,6 +42,7 @@ pub const uefi = @import("os/uefi.zig");
 pub const wasi = @import("os/wasi.zig");
 pub const windows = @import("os/windows.zig");
 pub const posix_spawn = @import("os/posix_spawn.zig");
+pub const ptrace = @import("os/ptrace.zig");
 
 comptime {
     assert(@import("std") == std); // std lib tests require --zig-lib-dir
diff --git a/lib/std/os/ptrace.zig b/lib/std/os/ptrace.zig
@@ -0,0 +1,28 @@
+const std = @import("std");
+const builtin = @import("builtin");
+
+const os = @import("../os.zig");
+const system = os.system;
+const errno = system.getErrno;
+const pid_t = system.pid_t;
+const unexpectedErrno = os.unexpectedErrno;
+const UnexpectedError = os.UnexpectedError;
+
+pub usingnamespace ptrace;
+
+const ptrace = if (builtin.target.isDarwin()) struct {
+    pub const PtraceError = error{
+        ProcessNotFound,
+        PermissionDenied,
+    } || UnexpectedError;
+
+    pub fn ptrace(request: i32, pid: pid_t) PtraceError!void {
+        switch (errno(system.ptrace(request, pid, null, 0))) {
+            .SUCCESS => return,
+            .SRCH => return error.ProcessNotFound,
+            .INVAL => unreachable,
+            .BUSY, .PERM => return error.PermissionDenied,
+            else => |err| return unexpectedErrno(err),
+        }
+    }
+} else struct {};