#ifndef _LIBC_SPAWN_H
#define _LIBC_SPAWN_H

#pragma once

#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
    * posix_spawn for MontaukOS, layered on SYS_SPAWN.
    *
    * Limitations (kernel spawn model):
    *  - argv is joined into a single args string; arguments containing
    *    spaces are rejected with EINVAL (no quoting in the kernel).
    *  - envp is copied into the child; NULL inherits the current environment.
    *  - file actions must be empty: stdio redirection needs kernel
    *    support that does not exist yet, so any recorded action makes
    *    posix_spawn fail with ENOTSUP rather than misbehave silently.
*/

typedef struct {
    short flags;
} posix_spawnattr_t;

typedef struct {
    int action_count;
} posix_spawn_file_actions_t;

int posix_spawnattr_init(posix_spawnattr_t *attr);
int posix_spawnattr_destroy(posix_spawnattr_t *attr);
int posix_spawnattr_setflags(posix_spawnattr_t *attr, short flags);
int posix_spawnattr_getflags(const posix_spawnattr_t *attr, short *flags);

int posix_spawn_file_actions_init(posix_spawn_file_actions_t *actions);
int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *actions);
int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *actions,
                                     int fd, int newfd);
int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *actions,
                                      int fd);
int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *actions,
                                     int fd, const char *path, int oflag,
                                     mode_t mode);

int posix_spawn(pid_t *pid, const char *path,
                const posix_spawn_file_actions_t *actions,
                const posix_spawnattr_t *attr,
                char *const argv[], char *const envp[]);
int posix_spawnp(pid_t *pid, const char *file,
                 const posix_spawn_file_actions_t *actions,
                 const posix_spawnattr_t *attr,
                 char *const argv[], char *const envp[]);

#ifdef __cplusplus
}
#endif

#endif /* _LIBC_SPAWN_H */