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-rw-r--r--man/journal-iterate-unique.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/man/journal-iterate-unique.c b/man/journal-iterate-unique.c
new file mode 100644
index 0000000..fcf92e7
--- /dev/null
+++ b/man/journal-iterate-unique.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <string.h>
+#include <systemd/sd-journal.h>
+
+int main(int argc, char *argv[]) {
+ sd_journal *j;
+ const void *d;
+ size_t l;
+ int r;
+
+ r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
+ if (r < 0) {
+ fprintf(stderr, "Failed to open journal: %s\n", strerror(-r));
+ return 1;
+ }
+ r = sd_journal_query_unique(j, "_SYSTEMD_UNIT");
+ if (r < 0) {
+ fprintf(stderr, "Failed to query journal: %s\n", strerror(-r));
+ return 1;
+ }
+ SD_JOURNAL_FOREACH_UNIQUE(j, d, l)
+ printf("%.*s\n", (int) l, (const char*) d);
+ sd_journal_close(j);
+ return 0;
+}