From 9590d343960137bffb40b1d42733f72edcfd370e Mon Sep 17 00:00:00 2001 From: Balazs Scheidler Date: Tue, 3 Dec 2024 23:03:15 +0100 Subject: [PATCH] affile/poll-file-changes: indicate immediate readability if we are not at EOF Previously this case was handled using the complex "immediate_check" logic, which I am about to get rid of. Signed-off-by: Balazs Scheidler --- modules/affile/poll-file-changes.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/modules/affile/poll-file-changes.c b/modules/affile/poll-file-changes.c index b8669497b4..cb76affda4 100644 --- a/modules/affile/poll-file-changes.c +++ b/modules/affile/poll-file-changes.c @@ -169,11 +169,11 @@ poll_file_changes_stop_watches(PollEvents *s) } static void -poll_file_changes_rearm_timer(PollFileChanges *self) +poll_file_changes_rearm_timer(PollFileChanges *self, glong delay) { iv_validate_now(); self->follow_timer.expires = iv_now; - timespec_add_msec(&self->follow_timer.expires, self->follow_freq); + timespec_add_msec(&self->follow_timer.expires, delay); iv_timer_register(&self->follow_timer); } @@ -181,8 +181,6 @@ static gboolean poll_file_changes_check_eof(PollFileChanges *self) { gint fd = self->fd; - if (fd < 0) - return FALSE; off_t pos = lseek(fd, 0, SEEK_CUR); if (pos == (off_t) -1) @@ -202,22 +200,32 @@ void poll_file_changes_update_watches(PollEvents *s, GIOCondition cond) { PollFileChanges *self = (PollFileChanges *) s; - gboolean check_again = TRUE; /* we can only provide input events */ g_assert((cond & ~G_IO_IN) == 0); poll_file_changes_stop_watches(s); + if (self->fd < 0) + { + /* file does not exist yet, go back checking after follow_freq */ + poll_file_changes_rearm_timer(self, self->follow_freq); + return; + } + if (poll_file_changes_check_eof(self)) { msg_trace("End of file, following file", evt_tag_str("follow_filename", self->follow_filename)); - check_again = poll_file_changes_on_eof(self); + if (poll_file_changes_on_eof(self)) + poll_file_changes_rearm_timer(self, self->follow_freq); + } + else + { + msg_trace("File exists and contains data", + evt_tag_str("follow_filename", self->follow_filename)); + poll_file_changes_rearm_timer(self, 0); } - - if (check_again) - poll_file_changes_rearm_timer(self); } void