diff options
| -rw-r--r-- | man/feh.1 | 11 | ||||
| -rw-r--r-- | src/signals.c | 21 |
2 files changed, 27 insertions, 5 deletions
@@ -677,6 +677,17 @@ the mouse. The zoom will always happen so that the pixel on which you entered the zoom mode remains stationary. So, to enlarge a specific part of an image, click the zoom button on that part. . +.Sh SIGNALS +In slideshow mode, +.Nm +handles the following signals: +.Bl -tag -width indent +.It SIGUSR1 +Switch to next image +.It SIGUSR2 +Switch to previous image +.El +. .Sh USAGE EXAMPLES Here are some examples of useful option combinations .Bl -tag -width indent diff --git a/src/signals.c b/src/signals.c index 4e51c77..eca77e6 100644 --- a/src/signals.c +++ b/src/signals.c @@ -34,15 +34,26 @@ void setup_signal_handlers() sigset_t feh_ss; D_ENTER(4); - sigemptyset(&feh_ss); - sigaddset(&feh_ss, SIGUSR1); - sigaddset(&feh_ss, SIGUSR2); + if ( + (sigemptyset(&feh_ss) == -1) || + (sigaddset(&feh_ss, SIGUSR1) == -1) || + (sigaddset(&feh_ss, SIGUSR2) == -1)) + { + weprintf("Failed to set up signal mask, SIGUSR1/2 won't work"); + D_RETURN_(4); + } feh_sh.sa_handler = feh_handle_signal; feh_sh.sa_mask = feh_ss; - sigaction(SIGUSR1, &feh_sh, NULL); - sigaction(SIGUSR2, &feh_sh, NULL); + if ( + (sigaction(SIGUSR1, &feh_sh, NULL) == -1) || + (sigaction(SIGUSR2, &feh_sh, NULL) == -1)) + { + weprintf("Failed to set up signal handler, SIGUSR1/2 won't work"); + D_RETURN_(4); + } + D_RETURN_(4); } |