Move usage text into usage_str var

For consistency and readability.

Note: This also makes exactly one extra blank line be printed at the end
of every usage text, which is currently only done in the following
files:

* src/fcopy/main.c
* src/fnettrace-dns/main.c
* src/fnettrace-icmp/main.c
* src/fnettrace-sni/main.c
* src/fnettrace/main.c
* src/profstats/main.c

1 files changed, 13 insertions, 11 deletions

diff --git a/src/fnettrace/main.c b/src/fnettrace/main.c
index 2f421562e..178ac3631 100644
--- a/src/fnettrace/main.c
+++ b/src/fnettrace/main.c
@@ -668,18 +668,20 @@ void logprintf(char *fmt, ...) {
         va_end(args);
 }
 
+static const char *const usage_str =
+        "Usage: fnettrace [OPTIONS]\n"
+        "Options:\n"
+        "   --help, -? - this help screen\n"
+        "   --log=filename - netlocker logfile\n"
+        "   --netfilter - build the firewall rules and commit them.\n"
+        "   --tail - \"tail -f\" functionality\n"
+        "Examples:\n"
+        "   # fnettrace                              - traffic trace\n"
+        "   # fnettrace --netfilter --log=logfile    - netlocker, dump output in logfile\n"
+        "   # fnettrace --tail --log=logifile        - similar to \"tail -f logfile\"\n";
+
 static void usage(void) {
-        printf("Usage: fnettrace [OPTIONS]\n");
-        printf("Options:\n");
-        printf("   --help, -? - this help screen\n");
-        printf("   --log=filename - netlocker logfile\n");
-        printf("   --netfilter - build the firewall rules and commit them.\n");
-        printf("   --tail - \"tail -f\" functionality\n");
-        printf("Examples:\n");
-        printf("   # fnettrace                              - traffic trace\n");
-        printf("   # fnettrace --netfilter --log=logfile    - netlocker, dump output in logfile\n");
-        printf("   # fnettrace --tail --log=logifile        - similar to \"tail -f logfile\"\n");
-        printf("\n");
+        puts(usage_str);
 }
 
 int main(int argc, char **argv) {