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authorLennart Poettering <lennart@poettering.net>2011-10-15 02:45:58 +0200
committerLennart Poettering <lennart@poettering.net>2011-10-15 02:45:58 +0200
commit8725d60ae4f7a8471aa8a0207fa105e335d069a6 (patch)
treef988d72e906e5b005511cd5d028e030b7588eb36 /src/journal
parente892bd1797e99c8afaa6afdbe413fda78937c9c3 (diff)
journal: implement seek to head/tail
Diffstat (limited to 'src/journal')
-rw-r--r--src/journal/journalctl.c8
-rw-r--r--src/journal/sd-journal.c31
-rw-r--r--src/journal/sd-journal.h43
3 files changed, 61 insertions, 21 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 3475b9d43c..3e5ee1af96 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -54,7 +54,8 @@ int main(int argc, char *argv[]) {
}
}
- SD_JOURNAL_FOREACH(j) {
+ SD_JOURNAL_FOREACH_BEGIN(j) {
+
const void *data;
size_t length;
char *cursor;
@@ -76,9 +77,10 @@ int main(int argc, char *argv[]) {
(unsigned long long) realtime,
(unsigned long long) monotonic);
- SD_JOURNAL_FOREACH_FIELD(j, data, length)
+ SD_JOURNAL_FOREACH_DATA(j, data, length)
printf("\t%.*s\n", (int) length, (const char*) data);
- }
+
+ } SD_JOURNAL_FOREACH_END(j);
finish:
if (j)
diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
index 985e3210ce..6a68275e9e 100644
--- a/src/journal/sd-journal.c
+++ b/src/journal/sd-journal.c
@@ -585,7 +585,7 @@ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret) {
}
-int sd_journal_get_field(sd_journal *j, const char *field, const void **data, size_t *size) {
+int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) {
JournalFile *f;
uint64_t i, n;
size_t field_length;
@@ -652,7 +652,7 @@ int sd_journal_get_field(sd_journal *j, const char *field, const void **data, si
return 0;
}
-int sd_journal_iterate_fields(sd_journal *j, const void **data, size_t *size) {
+int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) {
JournalFile *f;
uint64_t p, l, n, h;
size_t t;
@@ -702,12 +702,31 @@ int sd_journal_iterate_fields(sd_journal *j, const void **data, size_t *size) {
return 1;
}
-int sd_journal_seek_head(sd_journal *j) {
+void sd_journal_start_data(sd_journal *j) {
assert(j);
- return -EINVAL;
+
+ j->current_field = 0;
}
-int sd_journal_seek_tail(sd_journal *j) {
+static int real_journal_seek_head(sd_journal *j, direction_t direction) {
+ Iterator i;
+ JournalFile *f;
+
assert(j);
- return -EINVAL;
+
+ j->current_file = NULL;
+ j->current_field = 0;
+
+ HASHMAP_FOREACH(f, j->files, i)
+ f->current_offset = 0;
+
+ return real_journal_next(j, direction);
+}
+
+int sd_journal_seek_head(sd_journal *j) {
+ return real_journal_seek_head(j, DIRECTION_DOWN);
+}
+
+int sd_journal_seek_tail(sd_journal *j) {
+ return real_journal_seek_head(j, DIRECTION_UP);
}
diff --git a/src/journal/sd-journal.h b/src/journal/sd-journal.h
index 6b451b5765..bf6673453d 100644
--- a/src/journal/sd-journal.h
+++ b/src/journal/sd-journal.h
@@ -49,8 +49,9 @@ int sd_journal_next(sd_journal *j);
int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret);
int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret);
-int sd_journal_get_field(sd_journal *j, const char *field, const void **data, size_t *l);
-int sd_journal_iterate_fields(sd_journal *j, const void **data, size_t *l);
+int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *l);
+int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *l);
+void sd_journal_start_data(sd_journal *j);
int sd_journal_add_match(sd_journal *j, const void *data, size_t size);
void sd_journal_flush_matches(sd_journal *j);
@@ -58,13 +59,16 @@ void sd_journal_flush_matches(sd_journal *j);
int sd_journal_seek_head(sd_journal *j);
int sd_journal_seek_tail(sd_journal *j);
-int sd_journal_seek_monotonic_usec(sd_journal *j, uint64_t usec);
-int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec);
+int sd_journal_seek_monotonic_usec(sd_journal *j, uint64_t usec); /* missing */
+int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec); /* missing */
int sd_journal_get_cursor(sd_journal *j, char **cursor);
-int sd_journal_set_cursor(sd_journal *j, const char *cursor);
+int sd_journal_set_cursor(sd_journal *j, const char *cursor); /* missing */
-int sd_journal_get_fd(sd_journal *j);
+int sd_journal_unique_seek(sd_journal *j, const char *field); /* missing */
+int sd_journal_unique_enumerate(sd_journal *j, const void **data, size_t *l); /* missing */
+
+int sd_journal_get_fd(sd_journal *j); /* missing */
enum {
SD_JOURNAL_NOP,
@@ -74,13 +78,28 @@ enum {
int sd_journal_process(sd_journal *j);
-#define SD_JOURNAL_FOREACH(j) \
- while (sd_journal_next(j) > 0)
+#define SD_JOURNAL_FOREACH_BEGIN(j) \
+ if (sd_journal_seek_head(j) > 0) do {
+
+#define SD_JOURNAL_FOREACH_END(j) \
+ } while (sd_journal_next(j) > 0)
+
+#define SD_JOURNAL_FOREACH_CONTINUE(j) \
+ do {
+
+#define SD_JOURNAL_FOREACH_BACKWARDS_BEGIN(j) \
+ if (sd_journal_seek_tail(j) > 0) do {
+
+#define SD_JOURNAL_FOREACH_BACKWARDS_END(j) \
+ } while (sd_journal_previous(j) > 0)
+
+#define SD_JOURNAL_FOREACH_BACKWARDS_CONTINUE(j) \
+ do {
-#define SD_JOURNAL_FOREACH_BACKWARDS(j) \
- while (sd_journal_previous(j) > 0)
+#define SD_JOURNAL_FOREACH_DATA(j, data, l) \
+ for (sd_journal_start_data(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; )
-#define SD_JOURNAL_FOREACH_FIELD(j, data, l) \
- while (sd_journal_iterate_fields((j), &(data), &(l)) > 0)
+#define SD_JOURNAL_FOREACH_UNIQUE(j, data, l) \
+ while (sd_journal_enumerate_unique_data((j), &(data), &(l)) > 0)
#endif