sd_journal.h

#ifndef _CRTX_SD_JOURNAL_H
#define _CRTX_SD_JOURNAL_H
 
#ifdef __cplusplus
extern "C" {
    #endif
    
    /*
     * Mario Kicherer (dev@kicherer.org) 2022
     *
     */
    
    #include <systemd/sd-journal.h>
    #include "core.h"
    
    #define CRTX_SD_JOURNAL_EVT_NEW_ENTRY "sd_journal.new_entry"
    
    #define CRTX_SD_JOURNAL_EVT_NEW_ENTRY_ID (1<<0)
    
    struct crtx_sd_journal_print_event_userdata {
        FILE *f;
        char *buf;
        size_t buf_size;
        
        void (*cb)(struct crtx_sd_journal_print_event_userdata *udata);
        void *cb_data;
    };
    
    struct crtx_sd_journal_listener {
        struct crtx_listener_base base;
        
        sd_journal *sd_journal;
        int flags;
        int seek; // positive: skip first x entries, negative: read last x entries
        char try_read; // obsolete
        char same_boot_filter;
        
        int (*event_cb)(struct crtx_sd_journal_listener *jlstnr, void *userdata);
        void *event_cb_data;
    };
    
    struct crtx_listener_base *crtx_setup_sd_journal_listener(void *options);
    void crtx_sd_journal_clear_listener(struct crtx_sd_journal_listener *lstnr);
    CRTX_DECLARE_CALLOC_FUNCTION(sd_journal)
    
    void crtx_sd_journal_init();
    void crtx_sd_journal_finish();
    
    int crtx_sd_journal_print_event(struct crtx_sd_journal_listener *jlstnr, void *userdata);
    int crtx_sd_journal_gen_event_dict(struct crtx_sd_journal_listener *jlstnr, void *userdata);
    
    #ifdef __cplusplus
}
#endif
 
#endif