diff --git a/src/call.rs b/src/call.rs
index 623eae4..212338a 100644
--- a/src/call.rs
+++ b/src/call.rs
@@ -172,6 +172,11 @@ pub fn getpid() -> Result<usize> {
     unsafe { syscall0(SYS_GETPID) }
 }
 
+/// Get the process group ID
+pub fn getpgid(pid: usize) -> Result<usize> {
+    unsafe { syscall1(SYS_GETPGID, pid) }
+}
+
 /// Get the parent process ID
 pub fn getppid() -> Result<usize> {
     unsafe { syscall0(SYS_GETPPID) }
@@ -252,6 +257,11 @@ pub fn rmdir<T: AsRef<[u8]>>(path: T) -> Result<usize> {
     unsafe { syscall2(SYS_RMDIR, path.as_ref().as_ptr() as usize, path.as_ref().len()) }
 }
 
+/// Set the process group ID
+pub fn setpgid(pid: usize, pgid: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETPGID, pid, pgid) }
+}
+
 /// Set the current process group IDs
 pub fn setregid(rgid: usize, egid: usize) -> Result<usize> {
     unsafe { syscall2(SYS_SETREGID, rgid, egid) }
diff --git a/src/number.rs b/src/number.rs
index f2570a1..e240c7a 100644
--- a/src/number.rs
+++ b/src/number.rs
@@ -47,6 +47,7 @@ pub const SYS_GETEUID: usize =  201;
 pub const SYS_GETGID: usize =   200;
 pub const SYS_GETNS: usize =    950;
 pub const SYS_GETPID: usize =   20;
+pub const SYS_GETPGID: usize =  132;
 pub const SYS_GETPPID: usize =  64;
 pub const SYS_GETUID: usize =   199;
 pub const SYS_IOPL: usize =     110;
@@ -59,6 +60,7 @@ pub const SYS_PHYSMAP: usize =  947;
 pub const SYS_PHYSUNMAP: usize =948;
 pub const SYS_VIRTTOPHYS: usize=949;
 pub const SYS_PIPE2: usize =    331;
+pub const SYS_SETPGID: usize =  57;
 pub const SYS_SETREGID: usize = 204;
 pub const SYS_SETRENS: usize =  952;
 pub const SYS_SETREUID: usize = 203;