1 files changed, 84 insertions, 5 deletions

diff --git a/networking/nc.c b/networking/nc.c
index 243c47976..5fd8bd759 100644
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -9,10 +9,89 @@
 
 #include "libbb.h"
 
-#if ENABLE_DESKTOP
-#include "nc_bloaty.c"
+//config:config NC
+//config:       bool "nc"
+//config:       default y
+//config:       help
+//config:         A simple Unix utility which reads and writes data across network
+//config:         connections.
+//config:
+//config:config NC_SERVER
+//config:       bool "Netcat server options (-l)"
+//config:       default y
+//config:       depends on NC
+//config:       help
+//config:         Allow netcat to act as a server.
+//config:
+//config:config NC_EXTRA
+//config:       bool "Netcat extensions (-eiw and filename)"
+//config:       default y
+//config:       depends on NC
+//config:       help
+//config:         Add -e (support for executing the rest of the command line after
+//config:         making or receiving a successful connection), -i (delay interval for
+//config:         lines sent), -w (timeout for initial connection).
+//config:
+//config:config NC_110_COMPAT
+//config:       bool "Netcat 1.10 compatibility (+2.5k)"
+//config:       default y
+//config:       depends on NC
+//config:       help
+//config:         This option makes nc closely follow original nc-1.10.
+//config:         The code is about 2.5k bigger. It enables
+//config:         -s ADDR, -n, -u, -v, -o FILE, -z options, but loses
+//config:         busybox-specific extensions: -f FILE and -ll.
+
+#if ENABLE_NC_110_COMPAT
+# include "nc_bloaty.c"
 #else
 
+//usage:#if !ENABLE_NC_110_COMPAT
+//usage:
+//usage:#if ENABLE_NC_SERVER || ENABLE_NC_EXTRA
+//usage:#define NC_OPTIONS_STR "\n\nOptions:"
+//usage:#else
+//usage:#define NC_OPTIONS_STR
+//usage:#endif
+//usage:
+//usage:#define nc_trivial_usage
+//usage:        IF_NC_EXTRA("[-iN] [-wN] ")IF_NC_SERVER("[-l] [-p PORT] ")
+//usage:       "["IF_NC_EXTRA("-f FILE|")"IPADDR PORT]"IF_NC_EXTRA(" [-e PROG]")
+//usage:#define nc_full_usage "\n\n"
+//usage:       "Open a pipe to IP:PORT" IF_NC_EXTRA(" or FILE")
+//usage:        NC_OPTIONS_STR
+//usage:        IF_NC_EXTRA(
+//usage:     "\n        -e PROG Run PROG after connect"
+//usage:        IF_NC_SERVER(
+//usage:     "\n        -l      Listen mode, for inbound connects"
+//usage:        IF_NC_EXTRA(
+//usage:     "\n                (use -l twice with -e for persistent server)")
+//usage:     "\n        -p PORT Local port"
+//usage:        )
+//usage:     "\n        -w SEC  Timeout for connect"
+//usage:     "\n        -i SEC  Delay interval for lines sent"
+//usage:     "\n        -f FILE Use file (ala /dev/ttyS0) instead of network"
+//usage:        )
+//usage:
+//usage:#define nc_notes_usage ""
+//usage:        IF_NC_EXTRA(
+//usage:       "To use netcat as a terminal emulator on a serial port:\n\n"
+//usage:       "$ stty 115200 -F /dev/ttyS0\n"
+//usage:       "$ stty raw -echo -ctlecho && nc -f /dev/ttyS0\n"
+//usage:        )
+//usage:
+//usage:#define nc_example_usage
+//usage:       "$ nc foobar.somedomain.com 25\n"
+//usage:       "220 foobar ESMTP Exim 3.12 #1 Sat, 15 Apr 2000 00:03:02 -0600\n"
+//usage:       "help\n"
+//usage:       "214-Commands supported:\n"
+//usage:       "214-    HELO EHLO MAIL RCPT DATA AUTH\n"
+//usage:       "214     NOOP QUIT RSET HELP\n"
+//usage:       "quit\n"
+//usage:       "221 foobar closing connection\n"
+//usage:
+//usage:#endif
+
 /* Lots of small differences in features
  * when compared to "standard" nc
  */
@@ -39,7 +118,7 @@ int nc_main(int argc, char **argv)
 
         if (ENABLE_NC_SERVER || ENABLE_NC_EXTRA) {
                 /* getopt32 is _almost_ usable:
-                ** it cannot handle "... -e prog -prog-opt" */
+                ** it cannot handle "... -e PROG -prog-opt" */
                 while ((opt = getopt(argc, argv,
                         "" IF_NC_SERVER("lp:") IF_NC_EXTRA("w:i:f:e:") )) > 0
                 ) {
@@ -57,7 +136,7 @@ int nc_main(int argc, char **argv)
                                 /* We cannot just 'break'. We should let getopt finish.
                                 ** Or else we won't be able to find where
                                 ** 'host' and 'port' params are
-                                ** (think "nc -w 60 host port -e prog"). */
+                                ** (think "nc -w 60 host port -e PROG"). */
                                 IF_NC_EXTRA(
                                         char **p;
                                         // +2: one for progname (optarg) and one for NULL
@@ -70,7 +149,7 @@ int nc_main(int argc, char **argv)
                                 )
                                 /* optind points to argv[arvc] (NULL) now.
                                 ** FIXME: we assume that getopt will not count options
-                                ** possibly present on "-e prog args" and will not
+                                ** possibly present on "-e PROG ARGS" and will not
                                 ** include them into final value of optind
                                 ** which is to be used ...  */
                         } else bb_show_usage();