Implement kill() and killpg()

src/platform/src/linux/mod.rs

@@ -115,6 +115,14 @@ pub fn getuid() -> uid_t {
     e(unsafe { syscall!(GETUID) })
 }
 
+pub fn kill(pid: pid_t, sig: c_int) -> c_int {
+    e(unsafe { syscall!(KILL, pid, sig) }) as c_int
+}
+
+pub fn killpg(pgrp: pid_t, sig: c_int) -> c_int {
+    e(unsafe { syscall!(KILL, -(pgrp as isize) as pid_t, sig) }) as c_int
+}
+
 pub fn link(path1: *const c_char, path2: *const c_char) -> c_int {
     e(unsafe { syscall!(LINKAT, AT_FDCWD, path1, AT_FDCWD, path2, 0) }) as c_int
 }

src/platform/src/redox/mod.rs

@@ -119,6 +119,14 @@ pub fn getuid() -> uid_t {
     e(syscall::getuid()) as pid_t
 }
 
+pub fn kill(pid: pid_t, sig: c_int) -> c_int {
+    e(syscall::kill(pid, sig as usize)) as c_int
+}
+
+pub fn killpg(pgrp: pid_t, sig: c_int) -> c_int {
+    e(syscall::kill(-(pgrp as isize) as pid_t, sig as usize)) as c_int
+}
+
 pub fn link(path1: *const c_char, path2: *const c_char) -> c_int {
     let path1 = unsafe { c_str(path1) };
     let path2 = unsafe { c_str(path2) };

src/signal/src/lib.rs

@@ -27,12 +27,12 @@ pub type sigset_t = sys_sigset_t;
 
 #[no_mangle]
 pub extern "C" fn kill(pid: pid_t, sig: c_int) -> c_int {
-    unimplemented!();
+    platform::kill(pid, sig)
 }
 
 #[no_mangle]
 pub extern "C" fn killpg(pgrp: pid_t, sig: c_int) -> c_int {
-    unimplemented!();
+    platform::killpg(pgrp, sig)
 }
 
 #[no_mangle]