Standardize usage string var declarations

Changes:

* Name them all "usage_str"
* Make them const

For the latter item, see commit eb20f52ef ("Make list of paths const to
fix a false positive of gcc analyzer", 2022-07-27) / PR #5275.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/firemon/usage.c b/src/firemon/usage.c
index 0fb9908c5..411fc1600 100644
--- a/src/firemon/usage.c
+++ b/src/firemon/usage.c
@@ -19,7 +19,7 @@
 */
 #include "firemon.h"
 
-static char *help_str =
+static const char *const usage_str =
         "Usage: firemon [OPTIONS] [PID]\n\n"
         "Monitor processes started in a Firejail sandbox. Without any PID specified,\n"
         "all processes started by Firejail are monitored. Descendants of these processes\n"
@@ -84,5 +84,5 @@ void print_version(void) {
 
 void usage(void) {
         print_version();
-        puts(help_str);
+        puts(usage_str);
 }