code review 878047: syscall: match linux Setsid function signature to darwin

src/pkg/syscall/zsyscall_linux_386.go

 // mksyscall.sh -l32 syscall_linux.go syscall_linux_386.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
 
 import "unsafe"
 
 func pipe(p *[2]_C_int) (errno int) {
         _, _, e1 := Syscall(SYS_PIPE, uintptr(unsafe.Pointer(p)), 0, 0)
         errno = int(e1)
@@ skipping 416 matching lines @@
         errno = int(e1)
         return
 }
 
 func Setrlimit(resource int, rlim *Rlimit) (errno int) {
         _, _, e1 := Syscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
         errno = int(e1)
         return
 }
 
-func Setsid() (pid int) {
-        r0, _, _ := Syscall(SYS_SETSID, 0, 0, 0)
+func Setsid() (pid int, errno int) {
+        r0, _, e1 := Syscall(SYS_SETSID, 0, 0, 0)
         pid = int(r0)
+        errno = int(e1)
         return
 }
 
 func Settimeofday(tv *Timeval) (errno int) {
         _, _, e1 := Syscall(SYS_SETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
         errno = int(e1)
         return
 }
 
 func Setuid(uid int) (errno int) {
@@ skipping 264 matching lines @@
         errno = int(e1)
         return
 }
 
 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, errno int) {
         r0, _, e1 := Syscall6(SYS__NEWSELECT, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
         n = int(r0)
         errno = int(e1)
         return
 }