syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
|
|
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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|
|
|
// license that can be found in the LICENSE file.
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package syscall
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|
|
|
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|
import (
|
|
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|
"unsafe"
|
|
|
|
)
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|
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|
|
|
type SysProcAttr struct {
|
|
|
|
Chroot string // Chroot.
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|
|
|
Credential *Credential // Credential.
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|
|
Setsid bool // Create session.
|
2015-02-17 20:23:16 -07:00
|
|
|
Setpgid bool // Set process group ID to Pgid, or, if Pgid == 0, to new pid.
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|
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Setctty bool // Set controlling terminal to fd Ctty
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
|
|
Noctty bool // Detach fd 0 from controlling terminal
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2015-02-17 20:23:16 -07:00
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Ctty int // Controlling TTY fd
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Foreground bool // Place child's process group in foreground. (Implies Setpgid. Uses Ctty as fd of controlling TTY)
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Pgid int // Child's process group ID if Setpgid.
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
|
|
}
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// Implemented in runtime package.
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func runtime_BeforeFork()
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func runtime_AfterFork()
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func chdir(path uintptr) (err Errno)
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func chroot1(path uintptr) (err Errno)
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func close(fd uintptr) (err Errno)
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func execve(path uintptr, argv uintptr, envp uintptr) (err Errno)
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func exit(code uintptr)
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func fcntl1(fd uintptr, cmd uintptr, arg uintptr) (val uintptr, err Errno)
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func forkx(flags uintptr) (pid uintptr, err Errno)
|
2015-02-17 20:23:16 -07:00
|
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|
func getpid() (pid uintptr, err Errno)
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
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|
func ioctl(fd uintptr, req uintptr, arg uintptr) (err Errno)
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func setgid(gid uintptr) (err Errno)
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func setgroups1(ngid uintptr, gid uintptr) (err Errno)
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func setsid() (pid uintptr, err Errno)
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func setuid(uid uintptr) (err Errno)
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func setpgid(pid uintptr, pgid uintptr) (err Errno)
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func write1(fd uintptr, buf uintptr, nbyte uintptr) (n uintptr, err Errno)
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// Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child.
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// If a dup or exec fails, write the errno error to pipe.
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// (Pipe is close-on-exec so if exec succeeds, it will be closed.)
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// In the child, this function must not acquire any locks, because
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// they might have been locked at the time of the fork. This means
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// no rescheduling, no malloc calls, and no new stack segments.
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//
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// We call hand-crafted syscalls, implemented in
|
2015-01-15 09:26:01 -07:00
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// ../runtime/syscall_solaris.go, rather than generated libc wrappers
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
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|
// because we need to avoid lazy-loading the functions (might malloc,
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// split the stack, or acquire mutexes). We can't call RawSyscall
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// because it's not safe even for BSD-subsystem calls.
|
2015-10-19 18:01:37 -06:00
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//go:norace
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
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|
func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr *ProcAttr, sys *SysProcAttr, pipe int) (pid int, err Errno) {
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// Declare all variables at top in case any
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// declarations require heap allocation (e.g., err1).
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var (
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r1 uintptr
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err1 Errno
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nextfd int
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i int
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)
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// guard against side effects of shuffling fds below.
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// Make sure that nextfd is beyond any currently open files so
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// that we can't run the risk of overwriting any of them.
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fd := make([]int, len(attr.Files))
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nextfd = len(attr.Files)
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for i, ufd := range attr.Files {
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if nextfd < int(ufd) {
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nextfd = int(ufd)
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}
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fd[i] = int(ufd)
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}
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nextfd++
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// About to call fork.
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// No more allocation or calls of non-assembly functions.
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runtime_BeforeFork()
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r1, err1 = forkx(0x1) // FORK_NOSIGCHLD
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if err1 != 0 {
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runtime_AfterFork()
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return 0, err1
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}
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if r1 != 0 {
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// parent; return PID
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runtime_AfterFork()
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return int(r1), 0
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}
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// Fork succeeded, now in child.
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// Session ID
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if sys.Setsid {
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_, err1 = setsid()
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if err1 != 0 {
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goto childerror
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}
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}
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// Set process group
|
2015-02-17 20:23:16 -07:00
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if sys.Setpgid || sys.Foreground {
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// Place child in process group.
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err1 = setpgid(0, uintptr(sys.Pgid))
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if err1 != 0 {
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goto childerror
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}
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}
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if sys.Foreground {
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pgrp := sys.Pgid
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if pgrp == 0 {
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r1, err1 = getpid()
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if err1 != 0 {
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goto childerror
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}
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pgrp = int(r1)
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}
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// Place process group in foreground.
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err1 = ioctl(uintptr(sys.Ctty), uintptr(TIOCSPGRP), uintptr(unsafe.Pointer(&pgrp)))
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
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|
if err1 != 0 {
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goto childerror
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}
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}
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// Chroot
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if chroot != nil {
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err1 = chroot1(uintptr(unsafe.Pointer(chroot)))
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if err1 != 0 {
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goto childerror
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}
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}
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// User and groups
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if cred := sys.Credential; cred != nil {
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ngroups := uintptr(len(cred.Groups))
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groups := uintptr(0)
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if ngroups > 0 {
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groups = uintptr(unsafe.Pointer(&cred.Groups[0]))
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}
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err1 = setgroups1(ngroups, groups)
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if err1 != 0 {
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|
goto childerror
|
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}
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|
err1 = setgid(uintptr(cred.Gid))
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if err1 != 0 {
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goto childerror
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}
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err1 = setuid(uintptr(cred.Uid))
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if err1 != 0 {
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goto childerror
|
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}
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|
}
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|
|
|
|
|
|
// Chdir
|
|
|
|
if dir != nil {
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|
err1 = chdir(uintptr(unsafe.Pointer(dir)))
|
|
|
|
if err1 != 0 {
|
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|
|
goto childerror
|
|
|
|
}
|
|
|
|
}
|
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|
|
|
|
|
|
// Pass 1: look for fd[i] < i and move those up above len(fd)
|
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|
// so that pass 2 won't stomp on an fd it needs later.
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|
if pipe < nextfd {
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|
_, err1 = fcntl1(uintptr(pipe), F_DUP2FD, uintptr(nextfd))
|
|
|
|
if err1 != 0 {
|
|
|
|
goto childerror
|
|
|
|
}
|
|
|
|
fcntl1(uintptr(nextfd), F_SETFD, FD_CLOEXEC)
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|
|
pipe = nextfd
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|
|
nextfd++
|
|
|
|
}
|
|
|
|
for i = 0; i < len(fd); i++ {
|
|
|
|
if fd[i] >= 0 && fd[i] < int(i) {
|
|
|
|
_, err1 = fcntl1(uintptr(fd[i]), F_DUP2FD, uintptr(nextfd))
|
|
|
|
if err1 != 0 {
|
|
|
|
goto childerror
|
|
|
|
}
|
|
|
|
fcntl1(uintptr(nextfd), F_SETFD, FD_CLOEXEC)
|
|
|
|
fd[i] = nextfd
|
|
|
|
nextfd++
|
|
|
|
if nextfd == pipe { // don't stomp on pipe
|
|
|
|
nextfd++
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Pass 2: dup fd[i] down onto i.
|
|
|
|
for i = 0; i < len(fd); i++ {
|
|
|
|
if fd[i] == -1 {
|
|
|
|
close(uintptr(i))
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
if fd[i] == int(i) {
|
|
|
|
// dup2(i, i) won't clear close-on-exec flag on Linux,
|
|
|
|
// probably not elsewhere either.
|
|
|
|
_, err1 = fcntl1(uintptr(fd[i]), F_SETFD, 0)
|
|
|
|
if err1 != 0 {
|
|
|
|
goto childerror
|
|
|
|
}
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
// The new fd is created NOT close-on-exec,
|
|
|
|
// which is exactly what we want.
|
|
|
|
_, err1 = fcntl1(uintptr(fd[i]), F_DUP2FD, uintptr(i))
|
|
|
|
if err1 != 0 {
|
|
|
|
goto childerror
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// By convention, we don't close-on-exec the fds we are
|
|
|
|
// started with, so if len(fd) < 3, close 0, 1, 2 as needed.
|
|
|
|
// Programs that know they inherit fds >= 3 will need
|
|
|
|
// to set them close-on-exec.
|
|
|
|
for i = len(fd); i < 3; i++ {
|
|
|
|
close(uintptr(i))
|
|
|
|
}
|
|
|
|
|
|
|
|
// Detach fd 0 from tty
|
|
|
|
if sys.Noctty {
|
|
|
|
err1 = ioctl(0, uintptr(TIOCNOTTY), 0)
|
|
|
|
if err1 != 0 {
|
|
|
|
goto childerror
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-17 20:23:16 -07:00
|
|
|
// Set the controlling TTY to Ctty
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
|
|
if sys.Setctty {
|
2015-02-17 20:23:16 -07:00
|
|
|
err1 = ioctl(uintptr(sys.Ctty), uintptr(TIOCSCTTY), 0)
|
syscall: add support for GOOS=solaris
These are only the new files, autogenerated files are in a
different CL to keep the size down.
LGTM=dave, minux.ma, jsing
R=golang-codereviews, dave, jsing, gobot, minux.ma, rsc, iant, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/36000043
2014-02-25 03:12:10 -07:00
|
|
|
if err1 != 0 {
|
|
|
|
goto childerror
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Time to exec.
|
|
|
|
err1 = execve(
|
|
|
|
uintptr(unsafe.Pointer(argv0)),
|
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|
|
uintptr(unsafe.Pointer(&argv[0])),
|
|
|
|
uintptr(unsafe.Pointer(&envv[0])))
|
|
|
|
|
|
|
|
childerror:
|
|
|
|
// send error code on pipe
|
|
|
|
write1(uintptr(pipe), uintptr(unsafe.Pointer(&err1)), unsafe.Sizeof(err1))
|
|
|
|
for {
|
|
|
|
exit(253)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Try to open a pipe with O_CLOEXEC set on both file descriptors.
|
|
|
|
func forkExecPipe(p []int) error {
|
|
|
|
err := Pipe(p)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
_, err = fcntl(p[0], F_SETFD, FD_CLOEXEC)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
_, err = fcntl(p[1], F_SETFD, FD_CLOEXEC)
|
|
|
|
return err
|
|
|
|
}
|