From 8725d60ae4f7a8471aa8a0207fa105e335d069a6 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sat, 15 Oct 2011 02:45:58 +0200 Subject: journal: implement seek to head/tail --- src/journal/journalctl.c | 8 +++++--- src/journal/sd-journal.c | 31 +++++++++++++++++++++++++------ src/journal/sd-journal.h | 43 +++++++++++++++++++++++++++++++------------ 3 files changed, 61 insertions(+), 21 deletions(-) (limited to 'src/journal') 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 -- cgit v1.2.3-54-g00ecf