[PATCH] wireguard-tools: Extracted error message for the sake of legibility

[Ariel Otilibili <otilibil@eurecom.fr>]

Signed-off-by: Ariel Otilibili <otilibil@eurecom.fr>
---
 src/set.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/set.c b/src/set.c
index 75560fd..b2fbd54 100644
--- a/src/set.c
+++ b/src/set.c
@@ -16,9 +16,19 @@ int set_main(int argc, const char *argv[])
 {
 	struct wgdevice *device = NULL;
 	int ret = 1;
+	const char *error_message = "Usage: %s %s <interface>"
+	  " [listen-port <port>]"
+	  " [fwmark <mark>]"
+	  " [private-key <file path>]"
+	  " [peer <base64 public key> [remove]"
+	  " [preshared-key <file path>]"
+	  " [endpoint <ip>:<port>]"
+	  " [persistent-keepalive <interval seconds>]"
+	  " [allowed-ips <ip1>/<cidr1>[,<ip2>/<cidr2>]...]"
+	  " ]...\n";
 
 	if (argc < 3) {
-		fprintf(stderr, "Usage: %s %s <interface> [listen-port <port>] [fwmark <mark>] [private-key <file path>] [peer <base64 public key> [remove] [preshared-key <file path>] [endpoint <ip>:<port>] [persistent-keepalive <interval seconds>] [allowed-ips <ip1>/<cidr1>[,<ip2>/<cidr2>]...] ]...\n", PROG_NAME, argv[0]);
+		fprintf(stderr, error_message, PROG_NAME, argv[0]);
 		return 1;
 	}
 
-- 
2.45.2