nc: don't redirect stderr to network in -e PROG mode

This in incompatible with nc-1.10, but makes a lot of sense.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/networking/nc.c b/networking/nc.c
index 0c843a6..8cb4b30 100644 (file)
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -24,7 +24,7 @@
 //config:        Allow netcat to act as a server.
 //config:
 //config:config NC_EXTRA
-//config:      bool "Netcat extensions (-eiw and filename)"
+//config:      bool "Netcat extensions (-eiw and -f FILE)"
 //config:      default y
 //config:      depends on NC
 //config:      help
@@ -60,17 +60,18 @@
 //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               (use -ll with -e for persistent server)"
+//usage:       )
 //usage:     "\n       -p PORT Local port"
 //usage:       )
-//usage:     "\n       -w SEC  Timeout for connect"
+//usage:       IF_NC_EXTRA(
+//usage:     "\n       -w SEC  Connect timeout"
 //usage:     "\n       -i SEC  Delay interval for lines sent"
 //usage:     "\n       -f FILE Use file (ala /dev/ttyS0) instead of network"
+//usage:     "\n       -e PROG Run PROG after connect"
 //usage:       )
 //usage:
 //usage:#define nc_notes_usage ""
@@ -147,7 +148,7 @@ int nc_main(int argc, char **argv)
                                                *p++ = argv[optind++];
                                        }
                                )
-                               /* optind points to argv[arvc] (NULL) now.
+                               /* optind points to argv[argc] (NULL) now.
                                ** FIXME: we assume that getopt will not count options
                                ** possibly present on "-e PROG ARGS" and will not
                                ** include them into final value of optind
@@ -226,10 +227,9 @@ int nc_main(int argc, char **argv)
                /* child, or main thread if only one -l */
                xmove_fd(cfd, 0);
                xdup2(0, 1);
-               xdup2(0, 2);
+               /*xdup2(0, 2); - original nc 1.10 does this, we don't */
                IF_NC_EXTRA(BB_EXECVP(execparam[0], execparam);)
-               /* Don't print stuff or it will go over the wire... */
-               _exit(127);
+               bb_perror_msg_and_die("can't execute '%s'", execparam[0]);
        }
 
        /* Select loop copying stdin to cfd, and cfd to stdout */