rename --min_reachable again to --reachable, and update changelog

CHANGELOG.md

@@ -1,6 +1,11 @@
 fping 4.2 (UNRELEASED)
 ======================
 
+## New features
+
+- New option -x / --reachable to check if the number of reachable hosts is >= a certain
+  number. Useful for example to implement connectivity-checks (#138, thanks @deepak0004)
+
 ## Bugfixes and other changes
 
 - Fix build with --disable-ipv6 (#134, thanks @Polynomial-C)

doc/fping.pod

@@ -225,9 +225,10 @@ Show targets that are unreachable.
 
 Print B<fping> version information.
 
-=item B<-x>, B<--min_reachable>=I<N>
+=item B<-x>, B<--reachable>=I<N>
 
-Given a list of hosts, this mode prints if number of active hosts>=N or not.
+Given a list of hosts, this mode checks if number of reachable hosts is >= N
+and exits true in that case.
 
 =back
 

src/fping.c

@@ -419,7 +419,7 @@ int main(int argc, char** argv)
         { NULL, 'T', OPTPARSE_REQUIRED },
         { "unreach", 'u', OPTPARSE_NONE },
         { "version", 'v', OPTPARSE_NONE },
-        { "min_reachable", 'x', OPTPARSE_REQUIRED },
+        { "reachable", 'x', OPTPARSE_REQUIRED },
         { 0, 0, 0 }
     };
 
@@ -2788,6 +2788,6 @@ void usage(int is_error)
     fprintf(out, "   -s, --stats        print final stats\n");
     fprintf(out, "   -u, --unreach      show targets that are unreachable\n");
     fprintf(out, "   -v, --version      show version\n");
-    fprintf(out, "   -x, --min_reachable=N  shows if >=N hosts are reachable or not\n");
+    fprintf(out, "   -x, --reachable=N  shows if >=N hosts are reachable or not\n");
     exit(is_error);
 }