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[Qemu-devel] [PATCH 3/4] linux-user: Add proper error messages for bad o
From: |
meadori |
Subject: |
[Qemu-devel] [PATCH 3/4] linux-user: Add proper error messages for bad options |
Date: |
Mon, 6 Jul 2015 11:03:40 -0700 |
From: Meador Inge <address@hidden>
This patch adds better support for diagnosing option
parser errors. The previous implementation just printed
the usage text and exited when a bad option or argument
was found. This made it very difficult to determine why
the usage was being displayed and it was doubly confusing
for cases like '--help' (it wasn't clear that --help was
actually an error).
Signed-off-by: Meador Inge <address@hidden>
---
linux-user/main.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 2922d23..94badfc 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -3806,7 +3806,9 @@ static int parse_args(int argc, char **argv)
if (!strcmp(r, arginfo->argv)) {
if (arginfo->has_arg) {
if (optind >= argc) {
- usage(1);
+ (void) fprintf(stderr,
+ "qemu: missing argument for option '%s'\n", r);
+ exit(1);
}
arginfo->handle_opt(argv[optind]);
optind++;
@@ -3819,12 +3821,14 @@ static int parse_args(int argc, char **argv)
/* no option matched the current argv */
if (arginfo->handle_opt == NULL) {
- usage(1);
+ (void) fprintf(stderr, "qemu: unknown option '%s'\n", r);
+ exit(1);
}
}
if (optind >= argc) {
- usage(1);
+ (void) fprintf(stderr, "qemu: no user program specified\n");
+ exit(1);
}
filename = argv[optind];
--
1.8.1.1