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attach: use fd_cloexec()

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2018-07-11 23:43:38 +02:00
parent bcbef73392
commit 3f62938a8a
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1 changed files with 1 additions and 10 deletions
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11
src/lxc/attach.c
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@ -930,16 +930,7 @@ static int attach_child_main(struct attach_clone_payload *payload)
* here, ignore errors. * here, ignore errors.
*/ */
for (fd = STDIN_FILENO; fd <= STDERR_FILENO; fd++) { for (fd = STDIN_FILENO; fd <= STDERR_FILENO; fd++) {
int flags; ret = fd_cloexec(fd, false);
flags = fcntl(fd, F_GETFL);
if (flags < 0)
continue;
if ((flags & FD_CLOEXEC) == 0)
continue;
ret = fcntl(fd, F_SETFL, flags & ~FD_CLOEXEC);
if (ret < 0) { if (ret < 0) {
SYSERROR("Failed to clear FD_CLOEXEC from file descriptor %d", fd); SYSERROR("Failed to clear FD_CLOEXEC from file descriptor %d", fd);
goto on_error; goto on_error;