1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// +build !windows
package utils
import (
"io/ioutil"
"os"
"strconv"
"golang.org/x/sys/unix"
)
func CloseExecFrom(minFd int) error {
fdList, err := ioutil.ReadDir("/proc/self/fd")
if err != nil {
return err
}
for _, fi := range fdList {
fd, err := strconv.Atoi(fi.Name())
if err != nil {
// ignore non-numeric file names
continue
}
if fd < minFd {
// ignore descriptors lower than our specified minimum
continue
}
// intentionally ignore errors from unix.CloseOnExec
unix.CloseOnExec(fd)
// the cases where this might fail are basically file descriptors that have already been closed (including and especially the one that was created when ioutil.ReadDir did the "opendir" syscall)
}
return nil
}
// NewSockPair returns a new unix socket pair
func NewSockPair(name string) (parent *os.File, child *os.File, err error) {
fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM|unix.SOCK_CLOEXEC, 0)
if err != nil {
return nil, nil, err
}
return os.NewFile(uintptr(fds[1]), name+"-p"), os.NewFile(uintptr(fds[0]), name+"-c"), nil
}
|
