#include <errno.h>
#include <fcntl.h>
+#include <stddef.h>
#include "sd-journal.h"
#include "journal-def.h"
Hashmap *files;
JournalFile *current_file;
+ uint64_t current_field;
LIST_HEAD(Match, matches);
};
}
static int compare_order(JournalFile *af, Object *ao, uint64_t ap,
- JournalFile *bf, Object *bo, uint64_t bp) {
+ JournalFile *bf, Object *bo, uint64_t bp) {
uint64_t a, b;
+ /* We operate on two different files here, hence we can access
+ * two objects at the same time, which we normally can't */
+
if (sd_id128_equal(af->header->seqnum_id, bf->header->seqnum_id)) {
/* If this is from the same seqnum source, compare
a = le64toh(ao->entry.seqnum);
b = le64toh(bo->entry.seqnum);
+ if (a < b)
+ return -1;
+ if (a > b)
+ return 1;
+ }
- } else if (sd_id128_equal(ao->entry.boot_id, bo->entry.boot_id)) {
+ if (sd_id128_equal(ao->entry.boot_id, bo->entry.boot_id)) {
/* If the boot id matches compare monotonic time */
a = le64toh(ao->entry.monotonic);
b = le64toh(bo->entry.monotonic);
- } else {
-
- /* Otherwise compare UTC time */
- a = le64toh(ao->entry.realtime);
- b = le64toh(ao->entry.realtime);
+ if (a < b)
+ return -1;
+ if (a > b)
+ return 1;
}
- return
- a < b ? -1 :
- a > b ? +1 : 0;
+ /* Otherwise compare UTC time */
+ a = le64toh(ao->entry.realtime);
+ b = le64toh(ao->entry.realtime);
+
+ if (a < b)
+ return -1;
+ if (a > b)
+ return 1;
+
+ /* Finally, compare by contents */
+ a = le64toh(ao->entry.xor_hash);
+ b = le64toh(ao->entry.xor_hash);
+
+ if (a < b)
+ return -1;
+ if (a > b)
+ return 1;
+
+ return 0;
}
int sd_journal_next(sd_journal *j) {
else if (r == 0)
continue;
- if (!new_current || compare_order(new_current, new_entry, new_offset, f, o, p) > 0) {
+ if (!new_current ||
+ compare_order(new_current, new_entry, new_offset, f, o, p) > 0) {
new_current = f;
new_entry = o;
new_offset = p;
if (new_current) {
j->current_file = new_current;
- f->current_offset = new_offset;
+ j->current_file->current_offset = new_offset;
+ j->current_field = 0;
+
+ /* Skip over any identical entries in the other files too */
+
+ HASHMAP_FOREACH(f, j->files, i) {
+ Object *o;
+ uint64_t p;
+
+ if (j->current_file == f)
+ continue;
+
+ if (f->current_offset > 0) {
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+ } else
+ o = NULL;
+
+ r = journal_file_next_entry(f, o, &o, &p);
+ if (r < 0)
+ return r;
+ else if (r == 0)
+ continue;
+
+ if (compare_order(new_current, new_entry, new_offset, f, o, p) == 0)
+ f->current_offset = p;
+ }
+
return 1;
}
if (new_current) {
j->current_file = new_current;
- f->current_offset = new_offset;
+ j->current_file->current_offset = new_offset;
+ j->current_field = 0;
+
+ /* Skip over any identical entries in the other files too */
+
+ HASHMAP_FOREACH(f, j->files, i) {
+ Object *o;
+ uint64_t p;
+
+ if (j->current_file == f)
+ continue;
+
+ if (f->current_offset > 0) {
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+ } else
+ o = NULL;
+
+ r = journal_file_prev_entry(f, o, &o, &p);
+ if (r < 0)
+ return r;
+ else if (r == 0)
+ continue;
+
+ if (compare_order(new_current, new_entry, new_offset, f, o, p) == 0)
+ f->current_offset = p;
+ }
+
return 1;
}
return 0;
}
-int sd_journal_get_cursor(sd_journal *j, void **cursor, size_t *size) {
- JournalCursor *c;
+int sd_journal_get_cursor(sd_journal *j, char **cursor) {
Object *o;
int r;
+ char bid[33], sid[33];
assert(j);
assert(cursor);
- assert(size);
- if (!j->current_file || !j->current_file->current_offset <= 0)
- return 0;
+ if (!j->current_file || j->current_file->current_offset <= 0)
+ return -EADDRNOTAVAIL;
r = journal_file_move_to_object(j->current_file, j->current_file->current_offset, OBJECT_ENTRY, &o);
if (r < 0)
return r;
- c = new0(JournalCursor, 1);
- if (!c)
- return -ENOMEM;
-
- c->version = 1;
- c->seqnum = o->entry.seqnum;
- c->seqnum_id = j->current_file->header->seqnum_id;
- c->boot_id = o->entry.boot_id;
- c->monotonic = o->entry.monotonic;
- c->realtime = o->entry.realtime;
- c->xor_hash = o->entry.xor_hash;
+ sd_id128_to_string(j->current_file->header->seqnum_id, sid);
+ sd_id128_to_string(o->entry.boot_id, bid);
- *cursor = c;
- *size = sizeof(JournalCursor);
+ if (asprintf(cursor,
+ "s=%s;i=%llx;b=%s;m=%llx;t=%llx;x=%llx;p=%s",
+ sid, (unsigned long long) le64toh(o->entry.seqnum),
+ bid, (unsigned long long) le64toh(o->entry.monotonic),
+ (unsigned long long) le64toh(o->entry.realtime),
+ (unsigned long long) le64toh(o->entry.xor_hash),
+ file_name_from_path(j->current_file->path)) < 0)
+ return -ENOMEM;
return 1;
}
-int sd_journal_set_cursor(sd_journal *j, const void *cursor, size_t size) {
+int sd_journal_set_cursor(sd_journal *j, const char *cursor) {
return -EINVAL;
}
+static int add_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
+ char *fn;
+ int r;
+ JournalFile *f;
+
+ assert(j);
+ assert(prefix);
+ assert(filename);
+
+ if (dir)
+ fn = join(prefix, "/", dir, "/", filename, NULL);
+ else
+ fn = join(prefix, "/", filename, NULL);
+
+ if (!fn)
+ return -ENOMEM;
+
+ r = journal_file_open(fn, O_RDONLY, 0, NULL, &f);
+ free(fn);
+
+ if (r < 0) {
+ if (errno == ENOENT)
+ return 0;
+
+ return r;
+ }
+
+ r = hashmap_put(j->files, f->path, f);
+ if (r < 0) {
+ journal_file_close(f);
+ return r;
+ }
+
+ return 0;
+}
+
+static int add_directory(sd_journal *j, const char *prefix, const char *dir) {
+ char *fn;
+ int r;
+ DIR *d;
+
+ assert(j);
+ assert(prefix);
+ assert(dir);
+
+ fn = join(prefix, "/", dir, NULL);
+ if (!fn)
+ return -ENOMEM;
+
+ d = opendir(fn);
+ free(fn);
+
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ for (;;) {
+ struct dirent buf, *de;
+
+ r = readdir_r(d, &buf, &de);
+ if (r != 0 || !de)
+ break;
+
+ if (!dirent_is_file_with_suffix(de, ".journal"))
+ continue;
+
+ r = add_file(j, prefix, dir, de->d_name);
+ if (r < 0)
+ log_debug("Failed to add file %s/%s/%s: %s", prefix, dir, de->d_name, strerror(-r));
+ }
+
+ closedir(d);
+
+ return 0;
+}
+
int sd_journal_open(sd_journal **ret) {
sd_journal *j;
- char *fn;
const char *p;
- int r = 0;
const char search_paths[] =
"/run/log/journal\0"
"/var/log/journal\0";
+ int r;
assert(ret);
return -ENOMEM;
j->files = hashmap_new(string_hash_func, string_compare_func);
- if (!j->files)
+ if (!j->files) {
+ r = -ENOMEM;
goto fail;
+ }
+
+ /* We ignore most errors here, since the idea is to only open
+ * what's actually accessible, and ignore the rest. */
NULSTR_FOREACH(p, search_paths) {
DIR *d;
d = opendir(p);
if (!d) {
- if (errno != ENOENT && r == 0)
- r = -errno;
-
+ if (errno != ENOENT)
+ log_debug("Failed to open %s: %m", p);
continue;
}
for (;;) {
struct dirent buf, *de;
- int k;
- JournalFile *f;
-
- k = readdir_r(d, &buf, &de);
- if (k != 0) {
- if (r == 0)
- r = -k;
+ sd_id128_t id;
+ r = readdir_r(d, &buf, &de);
+ if (r != 0 || !de)
break;
- }
- if (!de)
- break;
+ if (dirent_is_file_with_suffix(de, ".journal")) {
+ r = add_file(j, p, NULL, de->d_name);
+ if (r < 0)
+ log_debug("Failed to add file %s/%s: %s", p, de->d_name, strerror(-r));
- if (!dirent_is_file_with_suffix(de, ".journal"))
- continue;
-
- fn = join(p, "/", de->d_name, NULL);
- if (!fn) {
- r = -ENOMEM;
- closedir(d);
- goto fail;
- }
-
- k = journal_file_open(fn, O_RDONLY, 0, &f);
- free(fn);
-
- if (k < 0) {
-
- if (r == 0)
- r = -k;
- } else {
- k = hashmap_put(j->files, f->path, f);
- if (k < 0) {
- journal_file_close(f);
- closedir(d);
+ } else if ((de->d_type == DT_DIR || de->d_type == DT_UNKNOWN) &&
+ sd_id128_from_string(de->d_name, &id) >= 0) {
- r = k;
- goto fail;
- }
+ r = add_directory(j, p, de->d_name);
+ if (r < 0)
+ log_debug("Failed to add directory %s/%s: %s", p, de->d_name, strerror(-r));
}
}
+
+ closedir(d);
}
*ret = j;
free(j);
}
+
+int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) {
+ Object *o;
+ JournalFile *f;
+ int r;
+
+ assert(j);
+ assert(ret);
+
+ f = j->current_file;
+ if (!f)
+ return 0;
+
+ if (f->current_offset <= 0)
+ return 0;
+
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+
+ *ret = le64toh(o->entry.realtime);
+ return 1;
+}
+
+int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret) {
+ Object *o;
+ JournalFile *f;
+ int r;
+ sd_id128_t id;
+
+ assert(j);
+ assert(ret);
+
+ f = j->current_file;
+ if (!f)
+ return 0;
+
+ if (f->current_offset <= 0)
+ return 0;
+
+ r = sd_id128_get_machine(&id);
+ if (r < 0)
+ return r;
+
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+
+ if (!sd_id128_equal(id, o->entry.boot_id))
+ return 0;
+
+ *ret = le64toh(o->entry.monotonic);
+ return 1;
+
+}
+
+int sd_journal_get_field(sd_journal *j, const char *field, const void **data, size_t *size) {
+ JournalFile *f;
+ uint64_t i, n;
+ size_t field_length;
+ int r;
+ Object *o;
+
+ assert(j);
+ assert(field);
+ assert(data);
+ assert(size);
+
+ if (isempty(field) || strchr(field, '='))
+ return -EINVAL;
+
+ f = j->current_file;
+ if (!f)
+ return 0;
+
+ if (f->current_offset <= 0)
+ return 0;
+
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+
+ field_length = strlen(field);
+
+ n = journal_file_entry_n_items(o);
+ for (i = 0; i < n; i++) {
+ uint64_t p, l;
+ size_t t;
+
+ p = le64toh(o->entry.items[i].object_offset);
+ r = journal_file_move_to_object(f, p, OBJECT_DATA, &o);
+ if (r < 0)
+ return r;
+
+ l = le64toh(o->object.size) - offsetof(Object, data.payload);
+
+ if (l >= field_length+1 &&
+ memcmp(o->data.payload, field, field_length) == 0 &&
+ o->data.payload[field_length] == '=') {
+
+ t = (size_t) l;
+
+ if ((uint64_t) t != l)
+ return -E2BIG;
+
+ *data = o->data.payload;
+ *size = t;
+
+ return 1;
+ }
+
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int sd_journal_iterate_fields(sd_journal *j, const void **data, size_t *size) {
+ JournalFile *f;
+ uint64_t p, l, n;
+ size_t t;
+ int r;
+ Object *o;
+
+ assert(j);
+ assert(data);
+ assert(size);
+
+ f = j->current_file;
+ if (!f)
+ return 0;
+
+ if (f->current_offset <= 0)
+ return 0;
+
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
+ if (r < 0)
+ return r;
+
+ n = journal_file_entry_n_items(o);
+ if (j->current_field >= n)
+ return 0;
+
+ p = le64toh(o->entry.items[j->current_field].object_offset);
+ r = journal_file_move_to_object(f, p, OBJECT_DATA, &o);
+ if (r < 0)
+ return r;
+
+ l = le64toh(o->object.size) - offsetof(Object, data.payload);
+ t = (size_t) l;
+
+ /* We can't read objects larger than 4G on a 32bit machine */
+ if ((uint64_t) t != l)
+ return -E2BIG;
+
+ *data = o->data.payload;
+ *size = t;
+
+ j->current_field ++;
+
+ return 1;
+}
+
+int sd_journal_seek_head(sd_journal *j) {
+ assert(j);
+ return -EINVAL;
+}
+
+int sd_journal_seek_tail(sd_journal *j) {
+ assert(j);
+ return -EINVAL;
+}