Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame^] | 2 | /* nc: mini-netcat - built from the ground up for LRP |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 3 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame^] | 4 | * Copyright (C) 1998, 1999 Charles P. Wright |
| 5 | * Copyright (C) 1998 Dave Cinege |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 6 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame^] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 8 | */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 9 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 10 | #include "libbb.h" |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 11 | |
Denys Vlasenko | 77cc2c5 | 2010-06-27 04:22:02 +0200 | [diff] [blame] | 12 | //config:config NC |
| 13 | //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)" |
Denys Vlasenko | fb4cb1c | 2010-07-18 23:02:36 +0200 | [diff] [blame] | 37 | //config: default n # off specially for Rob |
Denys Vlasenko | 77cc2c5 | 2010-06-27 04:22:02 +0200 | [diff] [blame] | 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" |
Denis Vlasenko | 29fe726 | 2007-04-05 20:26:28 +0000 | [diff] [blame] | 47 | #else |
| 48 | |
Denys Vlasenko | 77cc2c5 | 2010-06-27 04:22:02 +0200 | [diff] [blame] | 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 | |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 95 | /* Lots of small differences in features |
| 96 | * when compared to "standard" nc |
| 97 | */ |
| 98 | |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 99 | static void timeout(int signum UNUSED_PARAM) |
Mike Frysinger | 60a5c38 | 2005-05-06 04:45:38 +0000 | [diff] [blame] | 100 | { |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 101 | bb_error_msg_and_die("timed out"); |
Mike Frysinger | 60a5c38 | 2005-05-06 04:45:38 +0000 | [diff] [blame] | 102 | } |
| 103 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 104 | int nc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 105 | int nc_main(int argc, char **argv) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 106 | { |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 107 | /* sfd sits _here_ only because of "repeat" option (-l -l). */ |
| 108 | int sfd = sfd; /* for gcc */ |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 109 | int cfd = 0; |
Denis Vlasenko | 3163555 | 2007-01-20 16:54:19 +0000 | [diff] [blame] | 110 | unsigned lport = 0; |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 111 | IF_NOT_NC_SERVER(const) unsigned do_listen = 0; |
| 112 | IF_NOT_NC_EXTRA (const) unsigned wsecs = 0; |
| 113 | IF_NOT_NC_EXTRA (const) unsigned delay = 0; |
| 114 | IF_NOT_NC_EXTRA (const int execparam = 0;) |
| 115 | IF_NC_EXTRA (char **execparam = NULL;) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 116 | fd_set readfds, testfds; |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 117 | int opt; /* must be signed (getopt returns -1) */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 118 | |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 119 | if (ENABLE_NC_SERVER || ENABLE_NC_EXTRA) { |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 120 | /* getopt32 is _almost_ usable: |
Denys Vlasenko | 77cc2c5 | 2010-06-27 04:22:02 +0200 | [diff] [blame] | 121 | ** it cannot handle "... -e PROG -prog-opt" */ |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 122 | while ((opt = getopt(argc, argv, |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 123 | "" IF_NC_SERVER("lp:") IF_NC_EXTRA("w:i:f:e:") )) > 0 |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 124 | ) { |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 125 | if (ENABLE_NC_SERVER && opt == 'l') |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 126 | IF_NC_SERVER(do_listen++); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 127 | else if (ENABLE_NC_SERVER && opt == 'p') |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 128 | IF_NC_SERVER(lport = bb_lookup_port(optarg, "tcp", 0)); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 129 | else if (ENABLE_NC_EXTRA && opt == 'w') |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 130 | IF_NC_EXTRA( wsecs = xatou(optarg)); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 131 | else if (ENABLE_NC_EXTRA && opt == 'i') |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 132 | IF_NC_EXTRA( delay = xatou(optarg)); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 133 | else if (ENABLE_NC_EXTRA && opt == 'f') |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 134 | IF_NC_EXTRA( cfd = xopen(optarg, O_RDWR)); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 135 | else if (ENABLE_NC_EXTRA && opt == 'e' && optind <= argc) { |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 136 | /* We cannot just 'break'. We should let getopt finish. |
| 137 | ** Or else we won't be able to find where |
| 138 | ** 'host' and 'port' params are |
Denys Vlasenko | 77cc2c5 | 2010-06-27 04:22:02 +0200 | [diff] [blame] | 139 | ** (think "nc -w 60 host port -e PROG"). */ |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 140 | IF_NC_EXTRA( |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 141 | char **p; |
| 142 | // +2: one for progname (optarg) and one for NULL |
| 143 | execparam = xzalloc(sizeof(char*) * (argc - optind + 2)); |
| 144 | p = execparam; |
| 145 | *p++ = optarg; |
| 146 | while (optind < argc) { |
| 147 | *p++ = argv[optind++]; |
| 148 | } |
| 149 | ) |
| 150 | /* optind points to argv[arvc] (NULL) now. |
| 151 | ** FIXME: we assume that getopt will not count options |
Denys Vlasenko | 77cc2c5 | 2010-06-27 04:22:02 +0200 | [diff] [blame] | 152 | ** possibly present on "-e PROG ARGS" and will not |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 153 | ** include them into final value of optind |
| 154 | ** which is to be used ... */ |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 155 | } else bb_show_usage(); |
Matt Kraai | 1d70267 | 2001-02-07 04:09:23 +0000 | [diff] [blame] | 156 | } |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 157 | argv += optind; /* ... here! */ |
| 158 | argc -= optind; |
| 159 | // -l and -f don't mix |
| 160 | if (do_listen && cfd) bb_show_usage(); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 161 | // File mode needs need zero arguments, listen mode needs zero or one, |
| 162 | // client mode needs one or two |
| 163 | if (cfd) { |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 164 | if (argc) bb_show_usage(); |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 165 | } else if (do_listen) { |
| 166 | if (argc > 1) bb_show_usage(); |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 167 | } else { |
| 168 | if (!argc || argc > 2) bb_show_usage(); |
| 169 | } |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 170 | } else { |
| 171 | if (argc != 3) bb_show_usage(); |
| 172 | argc--; |
| 173 | argv++; |
| 174 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 175 | |
Mike Frysinger | 60a5c38 | 2005-05-06 04:45:38 +0000 | [diff] [blame] | 176 | if (wsecs) { |
| 177 | signal(SIGALRM, timeout); |
| 178 | alarm(wsecs); |
| 179 | } |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 180 | |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 181 | if (!cfd) { |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 182 | if (do_listen) { |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 183 | sfd = create_and_bind_stream_or_die(argv[0], lport); |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 184 | xlisten(sfd, do_listen); /* can be > 1 */ |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 185 | #if 0 /* nc-1.10 does not do this (without -v) */ |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 186 | /* If we didn't specify a port number, |
| 187 | * query and print it after listen() */ |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 188 | if (!lport) { |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 189 | len_and_sockaddr lsa; |
| 190 | lsa.len = LSA_SIZEOF_SA; |
| 191 | getsockname(sfd, &lsa.u.sa, &lsa.len); |
| 192 | lport = get_nport(&lsa.u.sa); |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 193 | fdprintf(2, "%d\n", ntohs(lport)); |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 194 | } |
Denis Vlasenko | f6b4685 | 2009-04-25 13:16:53 +0000 | [diff] [blame] | 195 | #endif |
Denis Vlasenko | 96e1b38 | 2007-09-30 23:50:48 +0000 | [diff] [blame] | 196 | close_on_exec_on(sfd); |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 197 | accept_again: |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 198 | cfd = accept(sfd, NULL, 0); |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 199 | if (cfd < 0) |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 200 | bb_perror_msg_and_die("accept"); |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 201 | if (!execparam) |
| 202 | close(sfd); |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 203 | } else { |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 204 | cfd = create_and_connect_stream_or_die(argv[0], |
| 205 | argv[1] ? bb_lookup_port(argv[1], "tcp", 0) : 0); |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 206 | } |
Matt Kraai | 1d70267 | 2001-02-07 04:09:23 +0000 | [diff] [blame] | 207 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 208 | |
Mike Frysinger | 60a5c38 | 2005-05-06 04:45:38 +0000 | [diff] [blame] | 209 | if (wsecs) { |
| 210 | alarm(0); |
Denys Vlasenko | 28a105d | 2009-06-01 11:26:30 +0200 | [diff] [blame] | 211 | /* Non-ignored signals revert to SIG_DFL on exec anyway */ |
Denis Vlasenko | 3fa36e2 | 2008-11-09 00:15:11 +0000 | [diff] [blame] | 212 | /*signal(SIGALRM, SIG_DFL);*/ |
Mike Frysinger | 60a5c38 | 2005-05-06 04:45:38 +0000 | [diff] [blame] | 213 | } |
| 214 | |
Eric Andersen | 1323c94 | 2002-04-26 23:59:12 +0000 | [diff] [blame] | 215 | /* -e given? */ |
Denis Vlasenko | d0e70af | 2006-10-16 01:10:28 +0000 | [diff] [blame] | 216 | if (execparam) { |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 217 | pid_t pid; |
| 218 | /* With more than one -l, repeatedly act as server */ |
Pascal Bellard | 926031b | 2010-07-04 15:32:38 +0200 | [diff] [blame] | 219 | if (do_listen > 1 && (pid = xvfork()) != 0) { |
| 220 | /* parent */ |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 221 | /* prevent zombies */ |
| 222 | signal(SIGCHLD, SIG_IGN); |
| 223 | close(cfd); |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 224 | goto accept_again; |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 225 | } |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 226 | /* child, or main thread if only one -l */ |
Denis Vlasenko | fa0b56d | 2008-07-01 16:09:07 +0000 | [diff] [blame] | 227 | xmove_fd(cfd, 0); |
| 228 | xdup2(0, 1); |
| 229 | xdup2(0, 2); |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 230 | IF_NC_EXTRA(BB_EXECVP(execparam[0], execparam);) |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 231 | /* Don't print stuff or it will go over the wire... */ |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 232 | _exit(127); |
| 233 | } |
| 234 | |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 235 | /* Select loop copying stdin to cfd, and cfd to stdout */ |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 236 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 237 | FD_ZERO(&readfds); |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 238 | FD_SET(cfd, &readfds); |
Matt Kraai | bfa7967 | 2000-12-15 22:34:34 +0000 | [diff] [blame] | 239 | FD_SET(STDIN_FILENO, &readfds); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 240 | |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 241 | for (;;) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 242 | int fd; |
Eric Andersen | 2ce1edc | 1999-10-12 15:42:48 +0000 | [diff] [blame] | 243 | int ofd; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 244 | int nread; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 245 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 246 | testfds = readfds; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 247 | |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 248 | if (select(cfd + 1, &testfds, NULL, NULL, NULL) < 0) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 249 | bb_perror_msg_and_die("select"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 250 | |
Denis Vlasenko | 74324c8 | 2007-06-04 10:16:52 +0000 | [diff] [blame] | 251 | #define iobuf bb_common_bufsiz1 |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 252 | fd = STDIN_FILENO; |
| 253 | while (1) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 254 | if (FD_ISSET(fd, &testfds)) { |
Denis Vlasenko | 74324c8 | 2007-06-04 10:16:52 +0000 | [diff] [blame] | 255 | nread = safe_read(fd, iobuf, sizeof(iobuf)); |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 256 | if (fd == cfd) { |
Denis Vlasenko | 5d68724 | 2007-01-12 20:59:31 +0000 | [diff] [blame] | 257 | if (nread < 1) |
Bernhard Reutner-Fischer | 636a1f8 | 2008-05-19 09:29:47 +0000 | [diff] [blame] | 258 | exit(EXIT_SUCCESS); |
Matt Kraai | bfa7967 | 2000-12-15 22:34:34 +0000 | [diff] [blame] | 259 | ofd = STDOUT_FILENO; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 260 | } else { |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 261 | if (nread < 1) { |
| 262 | /* Close outgoing half-connection so they get EOF, |
| 263 | * but leave incoming alone so we can see response */ |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 264 | shutdown(cfd, 1); |
Paul Fox | 7b71d74 | 2005-07-18 22:23:16 +0000 | [diff] [blame] | 265 | FD_CLR(STDIN_FILENO, &readfds); |
| 266 | } |
Rob Landley | 1cca948 | 2006-07-10 19:45:20 +0000 | [diff] [blame] | 267 | ofd = cfd; |
Eric Andersen | 2ce1edc | 1999-10-12 15:42:48 +0000 | [diff] [blame] | 268 | } |
Denis Vlasenko | 74324c8 | 2007-06-04 10:16:52 +0000 | [diff] [blame] | 269 | xwrite(ofd, iobuf, nread); |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 270 | if (delay > 0) |
| 271 | sleep(delay); |
Eric Andersen | 2ce1edc | 1999-10-12 15:42:48 +0000 | [diff] [blame] | 272 | } |
Tomoya Adachi | 63416cc | 2009-08-03 02:59:22 +0200 | [diff] [blame] | 273 | if (fd == cfd) |
| 274 | break; |
| 275 | fd = cfd; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 276 | } |
| 277 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 278 | } |
Denis Vlasenko | 29fe726 | 2007-04-05 20:26:28 +0000 | [diff] [blame] | 279 | #endif |