sd_journal_get_data - Read data fields from the current journal entry

NAME SYNOPSIS DESCRIPTION RETURN VALUE SEE ALSO

NAME

sd_journal_get_data, sd_journal_enumerate_data, sd_journal_enumerate_available_data, sd_journal_restart_data, SD_JOURNAL_FOREACH_DATA, sd_journal_set_data_threshold, sd_journal_get_data_threshold − Read data fields from the current journal entry

SYNOPSIS

#include <elogind/sd−journal.h>

	int sd_journal_get_data(sd_journal j, const char field, const void **data, size_t *length);
	int sd_journal_enumerate_data(sd_journal j, const void *data, size_t *length);
	int sd_journal_enumerate_available_data(sd_journal j, const void *data, size_t *length);
	void sd_journal_restart_data(sd_journal *j);
	SD_JOURNAL_FOREACH_DATA(sd_journal j, const void data, size_t length);
	int sd_journal_set_data_threshold(sd_journal *j, size_t sz);
	int sd_journal_get_data_threshold(sd_journal j, size_t sz);

DESCRIPTION

As elogind can not open any systemd journals, the functions sd_journal_get_data, sd_journal_enumerate_data, sd_journal_restart_data, sd_journal_set_data_threshold, sd_journal_get_data_threshold and the macro SD_JOURNAL_FOREACH_DATA do nothing.

RETURN VALUE

sd_journal_get_data() returns −ENOENT. sd_journal_restart_data() returns nothing. sd_journal_enumerate_data(), sd_journal_set_data_threshold() and sd_journal_get_threshold() return 0.

	int sd_journal_get_data(sd_journal j, const char field, const void **data, size_t *length);
	int sd_journal_enumerate_data(sd_journal j, const void *data, size_t *length);
	int sd_journal_enumerate_available_data(sd_journal j, const void *data, size_t *length);
	void sd_journal_restart_data(sd_journal *j);
	SD_JOURNAL_FOREACH_DATA(sd_journal j, const void data, size_t length);
	int sd_journal_set_data_threshold(sd_journal *j, size_t sz);
	int sd_journal_get_data_threshold(sd_journal j, size_t sz);