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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef SPAWN_SERVER_H
#define SPAWN_SERVER_H
#define SPAWN_SERVER_TRANSFER_FDS 4
typedef enum __attribute__((packed)) {
SPAWN_INSTANCE_TYPE_EXEC = 0,
#if !defined(OS_WINDOWS)
SPAWN_INSTANCE_TYPE_CALLBACK = 1
#endif
} SPAWN_INSTANCE_TYPE;
typedef enum __attribute__((packed)) {
SPAWN_SERVER_OPTION_EXEC = (1 << 0),
#if !defined(OS_WINDOWS)
SPAWN_SERVER_OPTION_CALLBACK = (1 << 1),
#endif
} SPAWN_SERVER_OPTIONS;
// this is only used publicly for SPAWN_INSTANCE_TYPE_CALLBACK
// which is not available in Windows
typedef struct spawn_request {
const char *cmdline; // the cmd line of the command we should run
size_t request_id; // the incremental request id
pid_t pid; // the pid of the child
int sock; // the socket for this request
int fds[SPAWN_SERVER_TRANSFER_FDS]; // 0 = stdin, 1 = stdout, 2 = stderr, 3 = custom
const char **environment; // the environment of the parent process
const char **argv; // the command line and its parameters
const void *data; // the data structure for the callback
size_t data_size; // the data structure size
SPAWN_INSTANCE_TYPE type; // the type of the request
struct spawn_request *prev, *next; // linking of active requests at the spawn server
} SPAWN_REQUEST;
typedef void (*spawn_request_callback_t)(SPAWN_REQUEST *request);
typedef struct spawm_instance SPAWN_INSTANCE;
typedef struct spawn_server SPAWN_SERVER;
SPAWN_SERVER* spawn_server_create(SPAWN_SERVER_OPTIONS options, const char *name, spawn_request_callback_t child_callback, int argc, const char **argv);
void spawn_server_destroy(SPAWN_SERVER *server);
SPAWN_INSTANCE* spawn_server_exec(SPAWN_SERVER *server, int stderr_fd, int custom_fd, const char **argv, const void *data, size_t data_size, SPAWN_INSTANCE_TYPE type);
int spawn_server_exec_kill(SPAWN_SERVER *server, SPAWN_INSTANCE *instance);
int spawn_server_exec_wait(SPAWN_SERVER *server, SPAWN_INSTANCE *instance);
int spawn_server_instance_read_fd(SPAWN_INSTANCE *si);
int spawn_server_instance_write_fd(SPAWN_INSTANCE *si);
pid_t spawn_server_instance_pid(SPAWN_INSTANCE *si);
void spawn_server_instance_read_fd_unset(SPAWN_INSTANCE *si);
void spawn_server_instance_write_fd_unset(SPAWN_INSTANCE *si);
#endif //SPAWN_SERVER_H
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