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/*
* Copyright (c) 2025 The OpenRC Authors.
* See the Authors file at the top-level directory of this distribution and
* https://github.com/OpenRC/openrc/blob/HEAD/AUTHORS
*
* This file is part of OpenRC. It is subject to the license terms in
* the LICENSE file found in the top-level directory of this
* distribution and at https://github.com/OpenRC/openrc/blob/HEAD/LICENSE
* This file may not be copied, modified, propagated, or distributed
* except according to the terms contained in the LICENSE file.
*/
#ifndef RC_EXEC_H
#define RC_EXEC_H
#include <stdbool.h>
#include <sys/types.h>
/*
* goal of this api is to provide a convenient and centralized way to do most
* of the fork() + exec() work. it doesn't attempt to do everything, but simple
* use-cases should be covered. if any simple functionality is missing, add it
* here instead of ad-hoc coding fork+exec yourself.
*/
enum {
/* default */
EXEC_NO_REDIRECT = -1,
/* make a pipe and redirect to it */
EXEC_MKPIPE = -2,
/* redirect to /dev/null */
EXEC_DEVNULL = -3,
};
struct exec_args {
const char **argv;
const char *cmd; /* if NULL, argv[0] is used */
int redirect_stdin;
int redirect_stdout;
int redirect_stderr;
uid_t uid;
gid_t gid;
bool setsid : 1;
};
struct exec_result {
pid_t pid;
/* returned in case of RC_EXEC_MKPIPE */
int proc_stdin;
int proc_stdout;
int proc_stderr;
};
struct exec_args exec_init(const char **argv);
struct exec_result do_exec(struct exec_args *args);
/* some exec related helplers */
int rc_waitpid(pid_t pid);
int rc_pipe_command(const char *cmd, int devnullfd);
#endif
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