ll2_read_all - Reads all entries from database and calls the callback function for each entry.

       Thorsten Kukuk (kukuk@suse.de)

       The liblastlog2 library is part of the util-linux package since version 2.40. It can be downloaded from
       Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.41                                    2025-02-26                                    LL2_READ_ALL(3)

       Reads all entries from database, defined in context, and calls callback function callback for each entry.
       If context is NULL, the default database, defined in LL2_DEFAULT_DATABASE, will be taken.

           char  *error = NULL;
           const char *user = "root";

           static int
           callback (const char *res_user, int64_t ll_time, const char *res_tty,
                     const char *res_rhost, const char *res_service, const char *cb_error)
           {
              /* returning != 0 if no further entry has to be handled by the callback */
              return 0;
           }

           int ret = ll2_read_all (NULL, callback, &error);

       ll2_read_all - Reads all entries from database and calls the callback function for each entry.

       For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>.

       Returns 0 on success, -ENOMEM or -1 on other failure. error contains an error string if the return value
       is -1. error is not guaranteed to contain an error string, could also be NULL. error should be freed by
       the caller. If lastlog2 database does not exist at all, the errno ENOENT is set and can be checked.

lastlog2(3), ll2_new_context(3),*ll2_unref_context(3),*ll2_write_entry(3), ll2_read_entry(3),
       ll2_update_login_time(3), ll2_remove_entry(3), ll2_rename_user(3), ll2_import_lastlog(3)

#include<lastlog2.h>intll2_read_all(structll2_context*context,int(*callback)(constchar*user,int64_tll_time,constchar*tty,constchar*rhost,constchar*pam_service,constchar*cb_error),char**error);