systemd.h

/* SPDX-License-Identifier: LGPL-2.1-only */
#ifndef _LIBCGROUP_SYSTEMD_H
#define _LIBCGROUP_SYSTEMD_H
 
#ifndef _LIBCGROUP_H_INSIDE
#error "Only <libcgroup.h> should be included directly."
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum cgroup_systemd_mode_t {
    CGROUP_SYSTEMD_MODE_FAIL = 0,
    CGROUP_SYSTEMD_MODE_REPLACE,
    CGROUP_SYSTEMD_MODE_ISOLATE,
    CGROUP_SYSTEMD_MODE_IGNORE_DEPS,
    CGROUP_SYSTEMD_MODE_IGNORE_REQS,
 
    CGROUP_SYSTEMD_MODE_CNT,
    CGROUP_SYSTEMD_MODE_DFLT = CGROUP_SYSTEMD_MODE_REPLACE
};
 
struct cgroup_systemd_scope_opts {
    int delegated;
    enum cgroup_systemd_mode_t mode;
    pid_t pid;
};
 
/*
 * cgroup systemd settings
 */
struct cgroup_systemd_opts {
    char    slice_name[FILENAME_MAX];
    char    scope_name[FILENAME_MAX];
    int setdefault;
    pid_t   pid;
    struct cgroup_systemd_opts *next;
};
 
int cgroup_set_default_scope_opts(struct cgroup_systemd_scope_opts * const opts);
 
int cgroup_create_scope(const char * const scope_name, const char * const slice_name,
            const struct cgroup_systemd_scope_opts * const opts);
 
int cgroup_create_scope2(struct cgroup *cgrp, int ignore_ownership,
             const struct cgroup_systemd_scope_opts * const opts);
 
int cgroup_set_default_systemd_cgroup(void);
 
int cgroup_alloc_systemd_opts(const char * const conf, const char * const value);
 
int cgroup_add_systemd_opts(const char * const conf, const char * const value);
 
void cgroup_cleanup_systemd_opts(void);
 
/*
 * Write the specified slice and scope to the libcgroup systemd run file. This
 * slice and scope will then be used as the default cgroup root. Subsequent
 * libcgroup commands, cgget, etc., will utilize this slice and scope when
 * constructing the libcgroup path
 *
 * @param slice systemd slice name, e.g. libcgroup.slice
 * @param scope systemd scope name, e.g. database.scope
 */
int cgroup_write_systemd_default_cgroup(const char * const slice,
                    const char * const scope);
 
/*
 * Return true if systemd support is compiled into the libcgroup library
 */
bool cgroup_is_systemd_enabled(void);
 
#ifdef __cplusplus
} /* extern "C" */
#endif
 
#endif /* _LIBCGROUP_SYSTEMD_H */