Subject: [PATCH] parse-opt: do not pring errors on unknown options, return -2 intead.

From: Pierre Habouzit <[email-masked]>
Date: Mon, 23 Jun 2008 23:11:21 +0200

This way we can catch "unknown" options more easily.

Signed-off-by: Pierre Habouzit <[email-masked]>
---
 parse-options.c |   35 ++++++++++++++++++++++++++---------
 1 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/parse-options.c b/parse-options.c
index 71b3476..1a1d4dc 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -132,7 +132,7 @@ static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *optio
 			return get_value(p, options, OPT_SHORT);
 		}
 	}
-	return error("unknown switch `%c'", *p->opt);
+	return -2;
 }
 
 static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
@@ -217,7 +217,7 @@ is_abbreviated:
 			abbrev_option->long_name);
 	if (abbrev_option)
 		return get_value(p, abbrev_option, abbrev_flags);
-	return error("unknown option `%s'", arg);
+	return -2;
 }
 
 void check_typos(const char *arg, const struct option *options)
@@ -271,15 +271,23 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
 			ctx->opt = arg + 1;
 			if (*ctx->opt == 'h')
 				return parse_options_usage(usagestr, options);
-			if (parse_short_opt(ctx, options) < 0)
-				usage_with_options(usagestr, options);
+			switch (parse_short_opt(ctx, options)) {
+			  case -1:
+				return parse_options_usage(usagestr, options);
+			  case -2:
+				return PARSE_OPT_UNKNOWN;
+			}
 			if (ctx->opt)
 				check_typos(arg + 1, options);
 			while (ctx->opt) {
 				if (*ctx->opt == 'h')
 					return parse_options_usage(usagestr, options);
-				if (parse_short_opt(ctx, options) < 0)
-					usage_with_options(usagestr, options);
+				switch (parse_short_opt(ctx, options)) {
+				  case -1:
+					return parse_options_usage(usagestr, options);
+				  case -2:
+					return PARSE_OPT_UNKNOWN;
+				}
 			}
 			continue;
 		}
@@ -296,8 +304,12 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
 			return usage_with_options_internal(usagestr, options, 1);
 		if (!strcmp(arg + 2, "help"))
 			return parse_options_usage(usagestr, options);
-		if (parse_long_opt(ctx, arg + 2, options))
-			usage_with_options(usagestr, options);
+		switch (parse_long_opt(ctx, arg + 2, options)) {
+		  case -1:
+			return parse_options_usage(usagestr, options);
+		  case -2:
+			return PARSE_OPT_UNKNOWN;
+		}
 	}
 	return PARSE_OPT_DONE;
 }
@@ -321,7 +333,12 @@ int parse_options(int argc, const char **argv, const struct option *options,
 	case PARSE_OPT_DONE:
 		break;
 	default: /* PARSE_OPT_UNKNOWN */
-		abort(); /* unreached yet */
+		if (ctx.argv[0][1] == '-') {
+			error("unknown option `%s'", ctx.argv[0] + 2);
+		} else {
+			error("unknown switch `%c'", *ctx.opt);
+		}
+		usage_with_options(usagestr, options);
 	}
 
 	return parse_options_end(&ctx);
-- 
1.5.6.117.g5fe2