[PATCH 4.14 021/159] objtool: Print top level commands on incorrect usage

Greg Kroah-Hartman
2017-12-22T08:59:04Z

From: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>

commit 6a93bb7e4a7d6670677d5b0eb980936eb9cc5d2e upstream.

Print top-level objtool commands, along with the error on incorrect
command line usage. Objtool command line parser exit's with code 129,
for incorrect usage. Convert the cmd_usage() exit code also, to maintain
consistency across objtool.

After the patch:

$ ./objtool -j

Unknown option: -j

usage: objtool COMMAND [ARGS]

Commands:
check Perform stack metadata validation on an object file
orc Generate in-place ORC unwind tables for an object file

$ echo $?
129

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1507992474-16142-1-git-send-email-kamalesh@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
tools/objtool/objtool.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

--- a/tools/objtool/objtool.c
+++ b/tools/objtool/objtool.c
@@ -70,7 +70,7 @@ static void cmd_usage(void)

printf("\n");

- exit(1);
+ exit(129);
}

static void handle_options(int *argc, const char ***argv)
@@ -86,9 +86,7 @@ static void handle_options(int *argc, co
break;
} else {
fprintf(stderr, "Unknown option: %s\n", cmd);
- fprintf(stderr, "\n Usage: %s\n",
- objtool_usage_string);
- exit(1);
+ cmd_usage();
}

(*argv)++;