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authorDaniel Wagner <daniel.wagner@siemens.com>2017-06-12 12:50:42 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2017-06-14 10:55:26 +0200
commit12e27a1b2adf14c33694db82e1f6f8bde560b9a2 (patch)
treed101a43c524488d1a146ecd3e7ac547f3ec67f32 /jffsX-utils/jffs2dump.c
parent9a357ee3b12e180ab116ac811c20c153e7aed254 (diff)
jffsX-utils: Return error code if command line option is unknown
The tools in question will quit with an exit code 0 if the command line option was not recognized. By returning an error code a calling script has the possibility to distinguish between a real success and an invalid invocation. Signed-off-by: Daniel Wagner <daniel.wagner@siemens.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'jffsX-utils/jffs2dump.c')
-rw-r--r--jffsX-utils/jffs2dump.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/jffsX-utils/jffs2dump.c b/jffsX-utils/jffs2dump.c
index 82f3197..a7d99e8 100644
--- a/jffsX-utils/jffs2dump.c
+++ b/jffsX-utils/jffs2dump.c
@@ -50,7 +50,7 @@
long imglen; // length of image
char *data; // image data
-void display_help (void)
+void display_help (int error)
{
printf("Usage: %s [OPTION]... INPUTFILE\n"
"Dump the contents of a binary JFFS2 image.\n\n"
@@ -65,7 +65,7 @@ void display_help (void)
" -o, --oobsize=LEN size of oob data chunk in binary image (NAND only)\n"
" -v, --verbose verbose output\n",
PROGRAM_NAME);
- exit(0);
+ exit(error ? EXIT_FAILURE : EXIT_SUCCESS);
}
void display_version (void)
@@ -124,7 +124,7 @@ void process_options (int argc, char *argv[])
switch (c) {
case 'h':
- display_help();
+ display_help(0);
break;
case 'V':
display_version();
@@ -161,7 +161,7 @@ void process_options (int argc, char *argv[])
}
if ((argc - optind) != 1 || error)
- display_help ();
+ display_help (error);
img = argv[optind];
}