From 159754c1cd7d2a86d5ba37746f8baeaf06e34123 Mon Sep 17 00:00:00 2001 From: Jon Lund Steffensen Date: Fri, 30 May 2014 00:16:35 +0200 Subject: redshift: Add hooks for user actions on period switch Hooks are executable scripts in ~/.config/redshift/hooks/ that are run when a certain event happens. The first parameter to the script indicates the event and further parameters may indicate more details about the event. The event "period-changed" is indicated when the period changes ("night", "daytime", "transition"). The second parameter is the old period and the third is the new period. The event is signaled when Redshift starts up with the old period set to "none". --- src/redshift.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'src/redshift.c') diff --git a/src/redshift.c b/src/redshift.c index 11b7f34..c1fc259 100644 --- a/src/redshift.c +++ b/src/redshift.c @@ -48,6 +48,7 @@ #include "config-ini.h" #include "solar.h" #include "systemtime.h" +#include "hooks.h" #define MIN(x,y) ((x) < (y) ? (x) : (y)) @@ -1422,6 +1423,18 @@ main(int argc, char *argv[]) perror("sigaction"); exit(EXIT_FAILURE); } + + /* Ignore CHLD signal. This causes child processes + (hooks) to be reaped automatically. */ + sigact.sa_handler = SIG_IGN; + sigact.sa_mask = sigset; + sigact.sa_flags = 0; + + r = sigaction(SIGCHLD, &sigact, NULL); + if (r < 0) { + perror("sigaction"); + exit(EXIT_FAILURE); + } #endif /* HAVE_SIGNAL_H && ! __WIN32__ */ if (verbose) { @@ -1517,6 +1530,12 @@ main(int argc, char *argv[]) print_period(period, transition); } + /* Activate hooks if period changed */ + if (period != prev_period) { + hooks_signal_period_change(prev_period, + period); + } + /* Ongoing short transition */ if (short_trans_delta) { /* Calculate alpha */ -- cgit v1.2.3-70-g09d2