7dc7f402a
Mike Frysinger
2005-05-06
Subject
make the exec (-e) an optional feature of netcat
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No binary (build failed)
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Commit Diff GitHub →
include/usage.h+9 -2
| @@ -1824,6 +1824,11 @@ | |
| " or\n" \ | |
| "$ nameif -c /etc/my_mactab_file\n" \ | |
| + | #ifdef CONFIG_NC_GAPING_SECURITY_HOLE |
| + | # define USAGE_NC_EXEC(a) a |
| + | #else |
| + | # define USAGE_NC_EXEC(a) |
| + | #endif |
| #define nc_trivial_usage \ | |
| "[OPTIONS] [IP] [port]" | |
| #define nc_full_usage \ | |
| @@ -1832,8 +1837,10 @@ | |
| "\t-l\t\tlisten mode, for inbound connects\n" \ | |
| "\t-p PORT\t\tlocal port number\n" \ | |
| "\t-i SECS\t\tdelay interval for lines sent\n" \ | |
| - | "\t-w SECS\t\ttimeout for connects and final net reads\n" \ |
| - | "\t-e PROG\t\tprogram to exec after connect (dangerous!)" |
| + | USAGE_NC_EXEC( \ |
| + | "\t-e PROG\t\tprogram to exec after connect (dangerous!)\n" \ |
| + | ) \ |
| + | "\t-w SECS\t\ttimeout for connects and final net reads" |
| #define nc_example_usage \ | |
| "$ nc foobar.somedomain.com 25\n" \ | |
| "220 foobar ESMTP Exim 3.12 #1 Sat, 15 Apr 2000 00:03:02 -0600\n" \ | |
networking/Config.in+8 -0
| @@ -422,6 +422,14 @@ config CONFIG_NC | |
| A simple Unix utility which reads and writes data across network | |
| connections. | |
| + | config CONFIG_NC_GAPING_SECURITY_HOLE |
| + | bool "gaping security hole" |
| + | default n |
| + | depends on CONFIG_NC |
| + | help |
| + | Add support for executing a program after making or receiving a |
| + | successful connection (-e option). |
| + | |
| config CONFIG_NETSTAT | |
| bool "netstat" | |
| default n | |
networking/nc.c+11 -16
| @@ -4,7 +4,7 @@ | |
| 0.0.1 6K It works. | |
| 0.0.2 5K Smaller and you can also check the exit condition if you wish. | |
| - | 0.0.3 Uses select() |
| + | 0.0.3 Uses select() |
| 19980918 Busy Boxed! Dave Cinege | |
| 19990512 Uses Select. Charles P. Wright | |
| @@ -23,7 +23,6 @@ | |
| You should have received a copy of the GNU General Public License | |
| along with this program; if not, write to the Free Software | |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| - | |
| */ | |
| #include <stdio.h> | |
| @@ -41,8 +40,6 @@ | |
| #include <sys/ioctl.h> | |
| #include "busybox.h" | |
| - | #define GAPING_SECURITY_HOLE |
| - | |
| static void timeout(int signum) | |
| { | |
| bb_error_msg_and_die("Timed out"); | |
| @@ -52,8 +49,8 @@ int nc_main(int argc, char **argv) | |
| { | |
| int do_listen = 0, lport = 0, delay = 0, wsecs = 0, tmpfd, opt, sfd, x; | |
| char buf[BUFSIZ]; | |
| - | #ifdef GAPING_SECURITY_HOLE |
| - | char * pr00gie = NULL; |
| + | #ifdef CONFIG_NC_GAPING_SECURITY_HOLE |
| + | char *pr00gie = NULL; |
| #endif | |
| struct sockaddr_in address; | |
| @@ -72,7 +69,7 @@ int nc_main(int argc, char **argv) | |
| case 'i': | |
| delay = atoi(optarg); | |
| break; | |
| - | #ifdef GAPING_SECURITY_HOLE |
| + | #ifdef CONFIG_NC_GAPING_SECURITY_HOLE |
| case 'e': | |
| pr00gie = optarg; | |
| break; | |
| @@ -85,13 +82,12 @@ int nc_main(int argc, char **argv) | |
| } | |
| } | |
| - | #ifdef GAPING_SECURITY_HOLE |
| + | #ifdef CONFIG_NC_GAPING_SECURITY_HOLE |
| if (pr00gie) { | |
| /* won't need stdin */ | |
| close (STDIN_FILENO); | |
| } | |
| - | #endif /* GAPING_SECURITY_HOLE */ |
| - | |
| + | #endif /* CONFIG_NC_GAPING_SECURITY_HOLE */ |
| if ((do_listen && optind != argc) || (!do_listen && optind + 2 != argc)) | |
| bb_show_usage(); | |
| @@ -142,19 +138,18 @@ int nc_main(int argc, char **argv) | |
| signal(SIGALRM, SIG_DFL); | |
| } | |
| - | #ifdef GAPING_SECURITY_HOLE |
| + | #ifdef CONFIG_NC_GAPING_SECURITY_HOLE |
| /* -e given? */ | |
| if (pr00gie) { | |
| dup2(sfd, 0); | |
| close(sfd); | |
| - | dup2 (0, 1); |
| - | dup2 (0, 2); |
| - | execl (pr00gie, pr00gie, NULL); |
| + | dup2(0, 1); |
| + | dup2(0, 2); |
| + | execl(pr00gie, pr00gie, NULL); |
| /* Don't print stuff or it will go over the wire.... */ | |
| _exit(-1); | |
| } | |
| - | #endif /* GAPING_SECURITY_HOLE */ |
| - | |
| + | #endif /* CONFIG_NC_GAPING_SECURITY_HOLE */ |
| FD_ZERO(&readfds); | |
| FD_SET(sfd, &readfds); | |