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ncsubproc: memset() clone_args rather than by-field

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nick black 2020-04-22 15:04:51 -04:00
parent 34629688d9
commit 12050a8ca7
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1 changed files with 10 additions and 12 deletions
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22
src/lib/fd.c
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@ -92,24 +92,22 @@ int ncfdplane_destroy(ncfdplane* n){
return ret;
}
// FIXME introduced in linux 5.5
#ifndef CLONE_CLEAR_SIGHAND
#define CLONE_CLEAR_SIGHAND 0x100000000ULL
#endif
static pid_t
launch_pipe_process(int* pipe, int* pidfd){
int pipes[2];
if(pipe2(pipes, O_CLOEXEC)){ // can't use O_NBLOCK here (affects client)
return -1;
}
struct clone_args clargs = {
.flags = CLONE_CLEAR_SIGHAND | CLONE_FS | CLONE_PIDFD,
.pidfd = (uintptr_t)pidfd,
.child_tid = 0,
.parent_tid = 0,
.exit_signal = SIGCHLD, // FIXME maybe switch it up for doctest?
.stack = 0, // automatically created by clone3()
.stack_size = 0, // automatically set by clone3()
.tls = 0,
.set_tid = 0,
.set_tid_size = 0,
};
struct clone_args clargs;
memset(&clargs, 0, sizeof(clargs));
clargs.pidfd = (uintptr_t)pidfd;
clargs.flags = CLONE_CLEAR_SIGHAND | CLONE_FS | CLONE_PIDFD;
clargs.exit_signal = SIGCHLD; // FIXME maybe switch it up for doctest?
pid_t p = syscall(__NR_clone3, &clargs, sizeof(clargs));
if(p == 0){
if(dup2(pipes[1], STDOUT_FILENO) < 0 || dup2(pipes[1], STDERR_FILENO) < 0){