Kernel: Add a systrace() syscall and implement /bin/strace using it.

Calling systrace(pid) gives you a file descriptor with a stream of the
syscalls made by a peer process. The process must be owned by the same
UID who calls systrace(). :^)

1 files changed, 6 insertions, 0 deletions

diff --git a/LibC/unistd.cpp b/LibC/unistd.cpp
index 19f02c034e..5cba9f33ae 100644
--- a/LibC/unistd.cpp
+++ b/LibC/unistd.cpp
@@ -16,6 +16,12 @@
 
 extern "C" {
 
+int systrace(pid_t pid)
+{
+    int rc = syscall(SC_systrace, pid);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
 int chown(const char* pathname, uid_t uid, gid_t gid)
 {
     int rc = syscall(SC_chown, pathname, uid, gid);