From e1753d6c06bd584f6f30be5fd4d90432f136f248 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Thu, 26 May 2022 11:48:14 +0100
Subject: [PATCH] Implemented getpid() and gettid()

---
 photon/libc/sys/horizon/unistd.c | 23 +++++++++++++++++++++++
 photon/libc/sys/horizon/unistd.h |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/photon/libc/sys/horizon/unistd.c b/photon/libc/sys/horizon/unistd.c
index 3382f75..9ab59e5 100644
--- a/photon/libc/sys/horizon/unistd.c
+++ b/photon/libc/sys/horizon/unistd.c
@@ -1,3 +1,6 @@
+#include <magenta/object.h>
+#include <magenta/bootstrap.h>
+#include <magenta/errors.h>
 #include <unistd.h>
 #include <errno.h>
 #include <mio/fs.h>
@@ -61,3 +64,23 @@ int close(int fd)
     __set_errno(0);
     return ret;
 }
+
+pid_t getpid(void)
+{
+    mx_info_task_t task_info;
+    mx_status_t status = mx_object_get_info(
+            mx_bootstrap_handle_get(MX_B_TASK_SELF),
+            MX_INFO_TASK,
+            &task_info, sizeof task_info);
+    return status == MX_OK ? task_info.leader_id : (pid_t)-1;
+}
+
+pid_t gettid(void)
+{
+    mx_info_task_t task_info;
+    mx_status_t status = mx_object_get_info(
+            mx_bootstrap_handle_get(MX_B_TASK_SELF),
+            MX_INFO_TASK,
+            &task_info, sizeof task_info);
+    return status == MX_OK ? task_info.id : (pid_t)-1;
+}
diff --git a/photon/libc/sys/horizon/unistd.h b/photon/libc/sys/horizon/unistd.h
index acec6d4..2dce1e4 100644
--- a/photon/libc/sys/horizon/unistd.h
+++ b/photon/libc/sys/horizon/unistd.h
@@ -18,4 +18,7 @@ extern int close(int fd);
 
 extern off_t lseek(int fd, off_t off, int whence);
 
+extern pid_t getpid(void);
+extern pid_t gettid(void);
+
 #endif