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    revision 984 by niro, Sun May 30 11:32:42 2010 UTC revision 1123 by niro, Wed Aug 18 21:56:57 2010 UTC
    # Line 9  Line 9 
    9    
    10  #include "libbb.h"  #include "libbb.h"
    11    
    12  #if ENABLE_DESKTOP  //config:config NC
    13  #include "nc_bloaty.c"  //config: bool "nc"
    14    //config: default y
    15    //config: help
    16    //config:  A simple Unix utility which reads and writes data across network
    17    //config:  connections.
    18    //config:
    19    //config:config NC_SERVER
    20    //config: bool "Netcat server options (-l)"
    21    //config: default y
    22    //config: depends on NC
    23    //config: help
    24    //config:  Allow netcat to act as a server.
    25    //config:
    26    //config:config NC_EXTRA
    27    //config: bool "Netcat extensions (-eiw and filename)"
    28    //config: default y
    29    //config: depends on NC
    30    //config: help
    31    //config:  Add -e (support for executing the rest of the command line after
    32    //config:  making or receiving a successful connection), -i (delay interval for
    33    //config:  lines sent), -w (timeout for initial connection).
    34    //config:
    35    //config:config NC_110_COMPAT
    36    //config: bool "Netcat 1.10 compatibility (+2.5k)"
    37    //config: default n  # off specially for Rob
    38    //config: depends on NC
    39    //config: help
    40    //config:  This option makes nc closely follow original nc-1.10.
    41    //config:  The code is about 2.5k bigger. It enables
    42    //config:  -s ADDR, -n, -u, -v, -o FILE, -z options, but loses
    43    //config:  busybox-specific extensions: -f FILE and -ll.
    44    
    45    #if ENABLE_NC_110_COMPAT
    46    # include "nc_bloaty.c"
    47  #else  #else
    48    
    49    //usage:#if !ENABLE_NC_110_COMPAT
    50    //usage:
    51    //usage:#if ENABLE_NC_SERVER || ENABLE_NC_EXTRA
    52    //usage:#define NC_OPTIONS_STR "\n\nOptions:"
    53    //usage:#else
    54    //usage:#define NC_OPTIONS_STR
    55    //usage:#endif
    56    //usage:
    57    //usage:#define nc_trivial_usage
    58    //usage: IF_NC_EXTRA("[-iN] [-wN] ")IF_NC_SERVER("[-l] [-p PORT] ")
    59    //usage:       "["IF_NC_EXTRA("-f FILE|")"IPADDR PORT]"IF_NC_EXTRA(" [-e PROG]")
    60    //usage:#define nc_full_usage "\n\n"
    61    //usage:       "Open a pipe to IP:PORT" IF_NC_EXTRA(" or FILE")
    62    //usage: NC_OPTIONS_STR
    63    //usage: IF_NC_EXTRA(
    64    //usage:     "\n -e PROG Run PROG after connect"
    65    //usage: IF_NC_SERVER(
    66    //usage:     "\n -l Listen mode, for inbound connects"
    67    //usage: IF_NC_EXTRA(
    68    //usage:     "\n (use -l twice with -e for persistent server)")
    69    //usage:     "\n -p PORT Local port"
    70    //usage: )
    71    //usage:     "\n -w SEC Timeout for connect"
    72    //usage:     "\n -i SEC Delay interval for lines sent"
    73    //usage:     "\n -f FILE Use file (ala /dev/ttyS0) instead of network"
    74    //usage: )
    75    //usage:
    76    //usage:#define nc_notes_usage ""
    77    //usage: IF_NC_EXTRA(
    78    //usage:       "To use netcat as a terminal emulator on a serial port:\n\n"
    79    //usage:       "$ stty 115200 -F /dev/ttyS0\n"
    80    //usage:       "$ stty raw -echo -ctlecho && nc -f /dev/ttyS0\n"
    81    //usage: )
    82    //usage:
    83    //usage:#define nc_example_usage
    84    //usage:       "$ nc foobar.somedomain.com 25\n"
    85    //usage:       "220 foobar ESMTP Exim 3.12 #1 Sat, 15 Apr 2000 00:03:02 -0600\n"
    86    //usage:       "help\n"
    87    //usage:       "214-Commands supported:\n"
    88    //usage:       "214-    HELO EHLO MAIL RCPT DATA AUTH\n"
    89    //usage:       "214     NOOP QUIT RSET HELP\n"
    90    //usage:       "quit\n"
    91    //usage:       "221 foobar closing connection\n"
    92    //usage:
    93    //usage:#endif
    94    
    95  /* Lots of small differences in features  /* Lots of small differences in features
    96   * when compared to "standard" nc   * when compared to "standard" nc
    97   */   */
    # Line 39  int nc_main(int argc, char **argv) Line 118  int nc_main(int argc, char **argv)
    118    
    119   if (ENABLE_NC_SERVER || ENABLE_NC_EXTRA) {   if (ENABLE_NC_SERVER || ENABLE_NC_EXTRA) {
    120   /* getopt32 is _almost_ usable:   /* getopt32 is _almost_ usable:
    121   ** it cannot handle "... -e prog -prog-opt" */   ** it cannot handle "... -e PROG -prog-opt" */
    122   while ((opt = getopt(argc, argv,   while ((opt = getopt(argc, argv,
    123          "" IF_NC_SERVER("lp:") IF_NC_EXTRA("w:i:f:e:") )) > 0          "" IF_NC_SERVER("lp:") IF_NC_EXTRA("w:i:f:e:") )) > 0
    124   ) {   ) {
    # Line 57  int nc_main(int argc, char **argv) Line 136  int nc_main(int argc, char **argv)
    136   /* We cannot just 'break'. We should let getopt finish.   /* We cannot just 'break'. We should let getopt finish.
    137   ** Or else we won't be able to find where   ** Or else we won't be able to find where
    138   ** 'host' and 'port' params are   ** 'host' and 'port' params are
    139   ** (think "nc -w 60 host port -e prog"). */   ** (think "nc -w 60 host port -e PROG"). */
    140   IF_NC_EXTRA(   IF_NC_EXTRA(
    141   char **p;   char **p;
    142   // +2: one for progname (optarg) and one for NULL   // +2: one for progname (optarg) and one for NULL
    # Line 70  int nc_main(int argc, char **argv) Line 149  int nc_main(int argc, char **argv)
    149   )   )
    150   /* optind points to argv[arvc] (NULL) now.   /* optind points to argv[arvc] (NULL) now.
    151   ** FIXME: we assume that getopt will not count options   ** FIXME: we assume that getopt will not count options
    152   ** possibly present on "-e prog args" and will not   ** possibly present on "-e PROG ARGS" and will not
    153   ** include them into final value of optind   ** include them into final value of optind
    154   ** which is to be used ...  */   ** which is to be used ...  */
    155   } else bb_show_usage();   } else bb_show_usage();
    # Line 137  int nc_main(int argc, char **argv) Line 216  int nc_main(int argc, char **argv)
    216   if (execparam) {   if (execparam) {
    217   pid_t pid;   pid_t pid;
    218   /* With more than one -l, repeatedly act as server */   /* With more than one -l, repeatedly act as server */
    219   if (do_listen > 1 && (pid = vfork()) != 0) {   if (do_listen > 1 && (pid = xvfork()) != 0) {
    220   /* parent or error */   /* parent */
      if (pid < 0)  
      bb_perror_msg_and_die("vfork");  
    221   /* prevent zombies */   /* prevent zombies */
    222   signal(SIGCHLD, SIG_IGN);   signal(SIGCHLD, SIG_IGN);
    223   close(cfd);   close(cfd);
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