syscall: support for tty options in StartProcess
These are the relevant changes to exec_unix.go now that
mkerrors.sh outputs have been updated.
R=rsc
CC=golang-dev
https://golang.org/cl/4648064
diff --git a/src/pkg/syscall/exec_unix.go b/src/pkg/syscall/exec_unix.go
index 4b3cfe4..46f05ef 100644
--- a/src/pkg/syscall/exec_unix.go
+++ b/src/pkg/syscall/exec_unix.go
@@ -146,6 +146,14 @@
}
}
+ // Set process group
+ if sys.Setpgid {
+ _, _, err1 = RawSyscall(SYS_SETPGID, 0, 0, 0)
+ if err1 != 0 {
+ goto childerror
+ }
+ }
+
// Chroot
if chroot != nil {
_, _, err1 = RawSyscall(SYS_CHROOT, uintptr(unsafe.Pointer(chroot)), 0, 0)
@@ -241,6 +249,22 @@
RawSyscall(SYS_CLOSE, uintptr(i), 0, 0)
}
+ // Detach fd 0 from tty
+ if sys.Noctty {
+ _, _, err1 = RawSyscall(SYS_IOCTL, 0, uintptr(TIOCNOTTY), 0)
+ if err1 != 0 {
+ goto childerror
+ }
+ }
+
+ // Make fd 0 the tty
+ if sys.Setctty {
+ _, _, err1 = RawSyscall(SYS_IOCTL, 0, uintptr(TIOCSCTTY), 0)
+ if err1 != 0 {
+ goto childerror
+ }
+ }
+
// Time to exec.
_, _, err1 = RawSyscall(SYS_EXECVE,
uintptr(unsafe.Pointer(argv0)),
@@ -260,12 +284,16 @@
panic("unreached")
}
+// Credential holds user and group identities to be assumed
+// by a child process started by StartProcess.
type Credential struct {
Uid uint32 // User ID.
Gid uint32 // Group ID.
Groups []uint32 // Supplementary group IDs.
}
+// ProcAttr holds attributes that will be applied to a new process started
+// by StartProcess.
type ProcAttr struct {
Dir string // Current working directory.
Env []string // Environment.
@@ -278,6 +306,9 @@
Credential *Credential // Credential.
Ptrace bool // Enable tracing.
Setsid bool // Create session.
+ Setpgid bool // Set process group ID to new pid (SYSV setpgrp)
+ Setctty bool // Set controlling terminal to fd 0
+ Noctty bool // Detach fd 0 from controlling terminal
}
var zeroProcAttr ProcAttr
