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syscall: add Cloneflags to Linux SysProcAttr.

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Also use clone(2) syscall instead of fork().

Fixes #6214.

R=golang-dev, bradfitz, dave
CC=golang-dev
https://golang.org/cl/13159044
This commit is contained in:
Rémy Oudompheng 2013-08-24 03:34:07 +02:00
parent d0dd420a24
commit 534c67abc4
1 changed files with 2 additions and 1 deletions
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3
src/pkg/syscall/exec_linux.go
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@ -20,6 +20,7 @@ type SysProcAttr struct {
Noctty bool // Detach fd 0 from controlling terminal
Ctty int // Controlling TTY fd (Linux only)
Pdeathsig Signal // Signal that the process will get when its parent dies (Linux only)
Cloneflags uintptr // Flags for clone calls (Linux only)
}
// Implemented in runtime package.
@ -61,7 +62,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
// About to call fork.
// No more allocation or calls of non-assembly functions.
runtime_BeforeFork()
r1, _, err1 = RawSyscall(SYS_FORK, 0, 0, 0)
r1, _, err1 = RawSyscall6(SYS_CLONE, uintptr(SIGCHLD)|sys.Cloneflags, 0, 0, 0, 0, 0)
if err1 != 0 {
runtime_AfterFork()
return 0, err1