On glibc, if output is redirected to a file, output will look like this:
touch test/ok/gif
touch test/ok/jpg
touch test/ok/png
touch test/ok/pnm
test/ok/gif
test/ok/jpg
test/ok/png
test/ok/pnm
On musl, if stdout is redirected to a file, output looks like this:
test/ok/gif
touch test/ok/gif
touch test/ok/jpg
touch test/ok/png
touch test/ok/pnm
test/ok/jpg
test/ok/png
test/ok/pnm
On glibc and musl, if stdout is interactive, it looks like this:
test/ok/gif
touch test/ok/gif
test/ok/jpg
touch test/ok/jpg
test/ok/png
touch test/ok/png
test/ok/pnm
touch test/ok/pnm
Adding two fflush calls makes all behavior look like the last example.
--- feh-2.22/src/list.c 2017-11-04 14:03:43.000000000 +0000
+++ feh-2.22/src/list.c 2018-01-03 02:59:08.840000000 +0000
@@ -92,6 +92,7 @@
if (opt.verbose)
feh_display_status('.');
puts(file->filename);
+ fflush(stdout);
feh_action_run(file, opt.actions[0], NULL);
}
else {
@@ -106,6 +107,7 @@
if (opt.verbose)
feh_display_status('.');
puts(file->filename);
+ fflush(stdout);
feh_action_run(file, opt.actions[0], NULL);
}
else {
--- feh-2.22/test/nx_action/loadable_action 2017-11-04 14:03:43.000000000 +0000
+++ feh-2.22/test/nx_action/loadable_action 2018-01-03 02:46:48.030000000 +0000
@@ -1,8 +1,8 @@
-touch test/ok/gif
-touch test/ok/jpg
-touch test/ok/png
-touch test/ok/pnm
test/ok/gif
+touch test/ok/gif
test/ok/jpg
+touch test/ok/jpg
test/ok/png
+touch test/ok/png
test/ok/pnm
+touch test/ok/pnm
--- feh-2.22/test/nx_action/loadable_naction 2017-11-04 14:03:43.000000000 +0000
+++ feh-2.22/test/nx_action/loadable_naction 2018-01-03 02:51:05.340000000 +0000
@@ -1,8 +1,8 @@
-touch test/ok/gif
-touch test/ok/jpg
-touch test/ok/png
-touch test/ok/pnm
test/ok/gif
+touch test/ok/gif
test/ok/jpg
+touch test/ok/jpg
test/ok/png
+touch test/ok/png
test/ok/pnm
+touch test/ok/pnm
--- feh-2.22/test/nx_action/unloadable_action 2017-11-04 14:03:43.000000000 +0000
+++ feh-2.22/test/nx_action/unloadable_action 2018-01-03 02:51:36.480000000 +0000
@@ -1,8 +1,8 @@
-rm test/fail/gif
-rm test/fail/jpg
-rm test/fail/png
-rm test/fail/pnm
test/fail/gif
+rm test/fail/gif
test/fail/jpg
+rm test/fail/jpg
test/fail/png
+rm test/fail/png
test/fail/pnm
+rm test/fail/pnm
--- feh-2.22/test/nx_action/unloadable_naction 2017-11-04 14:03:43.000000000 +0000
+++ feh-2.22/test/nx_action/unloadable_naction 2018-01-03 02:51:51.850000000 +0000
@@ -1,8 +1,8 @@
-rm test/fail/gif
-rm test/fail/jpg
-rm test/fail/png
-rm test/fail/pnm
test/fail/gif
+rm test/fail/gif
test/fail/jpg
+rm test/fail/jpg
test/fail/png
+rm test/fail/png
test/fail/pnm
+rm test/fail/pnm
