journal: add preliminary incomplete implementation

1 files changed, 91 insertions, 0 deletions

diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
new file mode 100644
index 0000000000..838e8436e4
--- /dev/null
+++ b/src/journal/journalctl.c
@@ -0,0 +1,91 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stddef.h>
+
+#include "journal-private.h"
+
+int main(int argc, char *argv[]) {
+        int r;
+        JournalFile *f;
+        Object *o = NULL;
+
+        log_parse_environment();
+        log_open();
+
+        r = journal_file_open(NULL, "/var/log/journal/system.journal", O_RDONLY, 0644, &f);
+        if (r == -ENOENT)
+                r = journal_file_open(NULL, "/run/log/journal/system.journal", O_RDONLY, 0644, &f);
+
+        if (r < 0) {
+                log_error("Failed to open journal: %s", strerror(-r));
+                return EXIT_FAILURE;
+        }
+
+        for (;;) {
+                uint64_t offset;
+                uint64_t n, i;
+
+                r = journal_file_next_entry(f, o, &o, &offset);
+                if (r < 0) {
+                        log_error("Failed to read journal: %s", strerror(-r));
+                        goto finish;
+                }
+
+                if (r == 0)
+                        break;
+
+                printf("entry: %llu\n", (unsigned long long) le64toh(o->entry.seqnum));
+
+                n = journal_file_entry_n_items(o);
+                for (i = 0; i < n; i++) {
+                        uint64_t p, l;
+
+                        p = le64toh(o->entry.items[i].object_offset);
+                        r = journal_file_move_to_object(f, p, &o);
+                        if (r < 0) {
+                                log_error("Failed to move to data: %s", strerror(-r));
+                                goto finish;
+                        }
+
+                        if (le64toh(o->object.type) != OBJECT_DATA) {
+                                log_error("Invalid file");
+                                goto finish;
+                        }
+
+                        l = o->object.size - offsetof(Object, data.payload);
+                        printf("\t[%.*s]\n", (int) l, o->data.payload);
+
+                        r = journal_file_move_to_object(f, offset, &o);
+                        if (r < 0) {
+                                log_error("Failed to move back to entry: %s", strerror(-r));
+                                goto finish;
+                        }
+                }
+        }
+
+finish:
+        journal_file_close(f);
+
+        return 0;
+}