X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsd_journal_next.xml;h=4df6b4e6fd9ff75943c014ff5113d98490465c22;hb=5a8bcb674f71a20e95df55319b34c556638378ce;hp=f55ee157444f5d954f11f4de84fe4a879a8c1223;hpb=67c3cf4f9ea35c1f789526b24a4d052d071902c0;p=elogind.git
diff --git a/man/sd_journal_next.xml b/man/sd_journal_next.xml
index f55ee1574..4df6b4e6f 100644
--- a/man/sd_journal_next.xml
+++ b/man/sd_journal_next.xml
@@ -47,6 +47,8 @@
sd_journal_previous
sd_journal_next_skip
sd_journal_previous_skip
+ SD_JOURNAL_FOREACH
+ SD_JOURNAL_FOREACH_BACKWARDS
Advance or set back the read pointer in the journal
@@ -56,26 +58,35 @@
int sd_journal_next
- sd_journal* j
+ sd_journal *j
int sd_journal_previous
- sd_journal* j
+ sd_journal *j
int sd_journal_next_skip
- sd_journal* j
+ sd_journal *j
uint64_t skip
int sd_journal_previous_skip
- sd_journal* j
+ sd_journal *j
uint64_t skip
+
+ SD_JOURNAL_FOREACH
+ sd_journal *j
+
+
+
+ SD_JOURNAL_FOREACH_BACKWARDS
+ sd_journal *j
+
@@ -91,7 +102,7 @@
functions such as
sd_journal_get_data3.
- Similar, sd_journal_previous() sets
+ Similarly, sd_journal_previous() sets
the read pointer back one entry.
sd_journal_next_skip() and
@@ -105,13 +116,20 @@
that the entry then pointing to is later in time than
then previous one, or has the same timestamp.
+ Note that
+ sd_journal_get_data3
+ and related calls will fail unless
+ sd_journal_next() has been
+ invoked at least once in order to position the read
+ pointer on a journal entry.
+
Note that the
SD_JOURNAL_FOREACH() macro may be used
as a wrapper around
sd_journal_seek_head3
and sd_journal_next() in order to
- make iteratring through the journal easier. See below
- for an example. Similar,
+ make iterating through the journal easier. See below
+ for an example. Similarly,
SD_JOURNAL_FOREACH_BACKWARDS()
may be used for iterating the journal in reverse
order.
@@ -122,8 +140,8 @@
The four calls return the number of entries
advanced/set back on success or a negative errno-style
- error code. When the end (resp. beginning) of the journal
- is reached a number smaller than requested is
+ error code. When the end or beginning of the journal
+ is reached, a number smaller than requested is
returned. More specifically, if
sd_journal_next() or
sd_journal_previous() reach the
@@ -138,10 +156,9 @@
The sd_journal_next(), sd_journal_previous(),
sd_journal_next_skip() and
sd_journal_previous_skip() interfaces are
- available as shared library, which can be compiled and
+ available as a shared library, which can be compiled and
linked to with the
- libsystemd-journal
- pkg-config1
+ libsystemd pkg-config1
file.
@@ -166,7 +183,7 @@ int main(int argc, char *argv[]) {
const char *d;
size_t l;
- r = sd_journal_get_data(j, "MESSAGE", &d, &l);
+ r = sd_journal_get_data(j, "MESSAGE", (const void **)&d, &l);
if (r < 0) {
fprintf(stderr, "Failed to read message field: %s\n", strerror(-r));
continue;
@@ -187,7 +204,9 @@ int main(int argc, char *argv[]) {
systemd1,
sd-journal3,
sd_journal_open3,
- sd_journal_get_data3
+ sd_journal_get_data3,
+ sd_journal_get_realtime_usec3,
+ sd_journal_get_cursor3