tools: specify optional arg syntax -o[ARG]

doc/dhtnode.1

@@ -7,7 +7,7 @@
 .SH SYNOPSIS
 .B dhtnode [-h]
 
-.B dhtnode [-v [\fIlogfile\fP]] [-i] [-d] [-n \fInetwork_id\fP] [-p \fIlocal_port\fP] [-b [\fIbootstrap_host\fP[:\fIport\fP]]]
+.B dhtnode [-v[\fIlogfile\fP]] [-i] [-d] [-n \fInetwork_id\fP] [-p \fIlocal_port\fP] [-b[\fIbootstrap_host\fP[:\fIport\fP]]]
 
 .SH DESCRIPTION
 
@@ -45,7 +45,7 @@ interactive shell:
 Prints some help.
 
 .TP
-\fB-v\fP \fIlogfile\fP
+\fB-v\fP\fIlogfile\fP
 Enable the verbose mode. Optionally provide a log file.
 
 .TP
@@ -66,7 +66,7 @@ the merge of two different networks (available since OpenDHT v0.6.1).
 Use port \fIlocal_port\fP for the program to bind to.
 
 .TP
-\fB-b\fP \fIbootstrap_host\fP[:\fIport\fP]
+\fB-b\fP\fIbootstrap_host\fP[:\fIport\fP]
 The program needs to be given a node to connect to the network. You use this
 option to provide the ip address of that node.
 

tools/dhtnode.cpp

@@ -29,7 +29,7 @@ extern "C" {
 using namespace dht;
 
 void print_usage() {
-    std::cout << "Usage: dhtnode [-v [logfile]] [-i] [-d] [-n network_id] [-p local_port] [-b [bootstrap_host[:port]]]" << std::endl << std::endl;
+    std::cout << "Usage: dhtnode [-v[logfile]] [-i] [-d] [-n network_id] [-p local_port] [-b[bootstrap_host[:port]]]" << std::endl << std::endl;
     std::cout << "dhtnode, a simple OpenDHT command line node runner." << std::endl;
     std::cout << "Report bugs to: http://opendht.net" << std::endl;
 }

tools/tools_common.h

@@ -155,7 +155,7 @@ static const constexpr struct option long_options[] = {
    {"net",        required_argument, nullptr, 'n'},
    {"bootstrap",  optional_argument, nullptr, 'b'},
    {"identity",   no_argument      , nullptr, 'i'},
-   {"verbose",    no_argument      , nullptr, 'v'},
+   {"verbose",    optional_argument, nullptr, 'v'},
    {"daemonize",  no_argument      , nullptr, 'd'},
    {nullptr,      0,                 nullptr,  0}
 };