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[iproute2-next,v2,1/5] lib: utils: Switch matches() to returning int again

Message ID 7f3153037fd56a99b25cca45de7a4b8000a41190.1700666420.git.petrm@nvidia.com (mailing list archive)
State Accepted
Commit 60254925ccab10cfd24dc43c91cb95e50f65c7cf
Delegated to: David Ahern
Headers show
Series Change parsing in parse_one_of(), parse_on_off() | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Petr Machata Nov. 22, 2023, 3:23 p.m. UTC
Since commit 1f420318bda3 ("utils: don't match empty strings as prefixes")
the function has pretended to return a boolean. But every user expects it
to return zero on success and a non-zero value on failure, like strcmp().
Even the function itself actually returns "true" to mean "no match". This
only makes sense if one considers a boolean to be a one-bit unsigned
integer with no inherent meaning, which I do not think is reasonable.

Switch the prototype back to int, and return 1 instead of true.

Cc: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
---
 include/utils.h | 2 +-
 lib/utils.c     | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/include/utils.h b/include/utils.h
index f26ed822..add55bfa 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -198,7 +198,7 @@  int check_ifname(const char *);
 int check_altifname(const char *name);
 int get_ifname(char *, const char *);
 const char *get_ifname_rta(int ifindex, const struct rtattr *rta);
-bool matches(const char *prefix, const char *string);
+int matches(const char *prefix, const char *string);
 int inet_addr_match(const inet_prefix *a, const inet_prefix *b, int bits);
 int inet_addr_match_rta(const inet_prefix *m, const struct rtattr *rta);
 
diff --git a/lib/utils.c b/lib/utils.c
index 99ba7a23..1fc42a9a 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -873,18 +873,18 @@  const char *get_ifname_rta(int ifindex, const struct rtattr *rta)
 	return name;
 }
 
-/* Returns false if 'prefix' is a not empty prefix of 'string'.
+/* Returns 0 if 'prefix' is a not empty prefix of 'string', != 0 otherwise.
  */
-bool matches(const char *prefix, const char *string)
+int matches(const char *prefix, const char *string)
 {
 	if (!*prefix)
-		return true;
+		return 1;
 	while (*string && *prefix == *string) {
 		prefix++;
 		string++;
 	}
 
-	return !!*prefix;
+	return *prefix;
 }
 
 int inet_addr_match(const inet_prefix *a, const inet_prefix *b, int bits)