X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsd_journal_get_fd.xml;h=809f00b9f3b8c98e62e4801d639b89752160bc60;hp=33d2980b3b45390d495c79833029babcfa1b6fff;hb=bdf9fc1a940e342afb7a78075984419cb3bc3135;hpb=39c155ea0d8b24895017fd5cf48508924ce2016d diff --git a/man/sd_journal_get_fd.xml b/man/sd_journal_get_fd.xml index 33d2980b3..809f00b9f 100644 --- a/man/sd_journal_get_fd.xml +++ b/man/sd_journal_get_fd.xml @@ -62,34 +62,34 @@ int sd_journal_get_fd - sd_journal* j + sd_journal *j int sd_journal_get_events - sd_journal* j + sd_journal *j int sd_journal_get_timeout - sd_journal* j - uint64_t* timeout_usec + sd_journal *j + uint64_t *timeout_usec int sd_journal_process - sd_journal* j + sd_journal *j int sd_journal_wait - sd_journal* j + sd_journal *j uint64_t timeout_usec int sd_journal_reliable_fd - sd_journal* j + sd_journal *j @@ -123,22 +123,28 @@ sd_journal_get_events() will return the poll() mask to wait for. This function will return a combination of - POLLIN and - POLLOUT and similar to fill into + POLLIN and + POLLOUT and similar to fill into the .events field of - struct pollfd. + struct pollfd. sd_journal_get_timeout() - will return a timeout value for usage in poll(). This returns a value in microseconds since the epoch of CLOCK_MONOTONIC for timing out poll() in timeout_usec. See + will return a timeout value for usage in + poll(). This returns a value in + microseconds since the epoch of + CLOCK_MONOTONIC for timing out + poll() in + timeout_usec. See clock_gettime2 for details about - CLOCK_MONOTONIC. If there's no - timeout to wait for this will fill in - (uint64_t) -1 instead. Note that + CLOCK_MONOTONIC. If there is no + timeout to wait for, this will fill in + (uint64_t) -1 instead. Note that poll() takes a relative timeout in milliseconds rather than an absolute timeout in - microseconds. To convert the absolute 'us' timeout into - relative 'ms', use code like the following: + microseconds. To convert the absolute 'us' timeout + into relative 'ms', use code like the + following: uint64_t t; int msec; @@ -154,7 +160,7 @@ else { } The code above does not do any error checking - for brevity's sake. The calculated msec + for brevity's sake. The calculated msec integer can be passed directly as poll()'s timeout parameter. @@ -174,7 +180,7 @@ else { synchronously wait until the journal gets changed. The maximum time this call sleeps may be controlled with the timeout_usec - parameter. Pass (uint64_t) -1 to + parameter. Pass (uint64_t) -1 to wait indefinitely. Internally this call simply combines sd_journal_get_fd(), sd_journal_get_events(), @@ -209,8 +215,8 @@ else { errno-style error code. sd_journal_get_events() - returns a combination of POLLIN, - POLLOUT and suchlike on success or + returns a combination of POLLIN, + POLLOUT and suchlike on success or a negative errno-style error code. sd_journal_reliable_fd() @@ -222,19 +228,19 @@ else { sd_journal_process() and sd_journal_wait() return one of - SD_JOURNAL_NOP, - SD_JOURNAL_APPEND or - SD_JOURNAL_INVALIDATE on success or + SD_JOURNAL_NOP, + SD_JOURNAL_APPEND or + SD_JOURNAL_INVALIDATE on success or a negative errno-style error code. If - SD_JOURNAL_NOP is returned the - journal didn't change since the last invocation. If - SD_JOURNAL_APPEND is returned new + SD_JOURNAL_NOP is returned, the + journal did not change since the last invocation. If + SD_JOURNAL_APPEND is returned, new entries have been appended to the end of the - journal. If SD_JOURNAL_INVALIDATE + journal. If SD_JOURNAL_INVALIDATE, journal files were added or removed (possibly due to - rotation). In the latter event live-view UIs should - probably refresh their entire display while in the - case of SD_JOURNAL_APPEND it is + rotation). In the latter event, live-view UIs should + probably refresh their entire display, while in the + case of SD_JOURNAL_APPEND, it is sufficient to simply continue reading at the previous end of the journal. @@ -247,10 +253,9 @@ else { sd_journal_reliable_fd(), sd_journal_process() and sd_journal_wait() 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. @@ -325,8 +330,7 @@ int wait_for_changes(sd_journal *j) { pollfd.events = sd_journal_get_events(j); poll(&pollfd, 1, msec); return sd_journal_process(j); -} - +}