[hackers] [blind] blind-next-frame: fix exit status on incorrect usage || Mattias Andrée

[git]

commit af3cee4bebc3fed17c8932cc55c8cb694c250447
Author:     Mattias Andrée <maand...@kth.se>
AuthorDate: Wed Aug 16 18:54:18 2017 +0200
Commit:     Mattias Andrée <maand...@kth.se>
CommitDate: Wed Aug 16 18:54:18 2017 +0200

    blind-next-frame: fix exit status on incorrect usage
    
    Signed-off-by: Mattias Andrée <maand...@kth.se>

diff --git a/src/blind-next-frame.c b/src/blind-next-frame.c
index be6c303..1d33c46 100644
--- a/src/blind-next-frame.c
+++ b/src/blind-next-frame.c
@@ -1,7 +1,7 @@
 /* See LICENSE file for copyright and license details. */
 #include "common.h"
 
-USAGE("[-f frames] width height pixel-format ...")
+NUSAGE(2, "[-f frames] width height pixel-format ...")
 
 int
 main(int argc, char *argv[])
diff --git a/src/util.h b/src/util.h
index c51dbc9..5c1873d 100644
--- a/src/util.h
+++ b/src/util.h
@@ -15,9 +15,12 @@
 #define INTSTRLEN(TYPE)   ((sizeof(TYPE) == 1 ? 3 : (5 * sizeof(TYPE) / 2)) + 
((TYPE)-1 < 1))
 
 #define USAGE(SYNOPSIS)\
+       NUSAGE(1, SYNOPSIS)
+
+#define NUSAGE(STATUS, SYNOPSIS)\
        ATTRIBUTE_NORETURN\
        static void usage(void)\
-       { eprintf("usage: %s%s%s\n", argv0, *SYNOPSIS ? " " : "", SYNOPSIS); }
+       { enprintf((STATUS), "usage: %s%s%s\n", argv0, *SYNOPSIS ? " " : "", 
SYNOPSIS); }
 
 #include "util/eprintf.h"
 #include "util/efflush.h"