diff options
Diffstat (limited to 'networking/telnetd.c')
| -rw-r--r-- | networking/telnetd.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/networking/telnetd.c b/networking/telnetd.c index 21b704a..9246f70 100644 --- a/networking/telnetd.c +++ b/networking/telnetd.c @@ -21,7 +21,6 @@ * Set process group corrections, initial busybox port */ -/*#define DEBUG 1 */ #define DEBUG 0 #include "libbb.h" @@ -34,8 +33,6 @@ #include <sys/syslog.h> -#define BUFSIZE 4000 - #if ENABLE_LOGIN static const char *loginpath = "/bin/login"; #else @@ -44,10 +41,6 @@ static const char *loginpath = DEFAULT_SHELL; static const char *issuefile = "/etc/issue.net"; -/* shell name and arguments */ - -static const char *argv_init[2]; - /* structure that describes a session */ struct tsession { @@ -60,6 +53,10 @@ struct tsession { int rdidx2, wridx2, size2; }; +/* Two buffers are directly after tsession in malloced memory. + * Make whole thing fit in 4k */ +enum { BUFSIZE = (4*1024 - sizeof(struct tsession)) / 2 }; + /* This is how the buffers are used. The arrows indicate the movement of data. @@ -231,6 +228,7 @@ make_new_session( USE_FEATURE_TELNETD_STANDALONE(int sock_r, int sock_w) SKIP_FEATURE_TELNETD_STANDALONE(void) ) { + const char *login_argv[2]; struct termios termbuf; int fd, pid; char tty_name[32]; @@ -283,7 +281,7 @@ make_new_session( /* child */ - /* make new process group */ + /* make new session and process group */ setsid(); /* open the child's side of the tty. */ @@ -294,7 +292,7 @@ make_new_session( dup2(fd, 1); dup2(fd, 2); while (fd > 2) close(fd--); - tcsetpgrp(0, getpid()); /* comment? */ + tcsetpgrp(0, getpid()); /* switch this tty's process group to us */ /* The pseudo-terminal allocated to the client is configured to operate in * cooked mode, and with XTABS CRMOD enabled (see tty(4)). */ @@ -308,9 +306,12 @@ make_new_session( print_login_issue(issuefile, NULL); - /* exec shell, with correct argv and env */ - execv(loginpath, (char *const *)argv_init); - bb_perror_msg_and_die("execv"); + /* exec shell / login /whatever */ + login_argv[0] = loginpath; + login_argv[1] = NULL; + execv(loginpath, (char **)login_argv); + /* Hmmm... this gets sent to the client thru fd#2! Is it ok?? */ + bb_perror_msg_and_die("execv %s", loginpath); } #if ENABLE_FEATURE_TELNETD_STANDALONE @@ -405,7 +406,6 @@ int telnetd_main(int argc, char **argv) /* Used to check access(loginpath, X_OK) here. Pointless. * exec will do this for us for free later. */ - argv_init[0] = loginpath; #if ENABLE_FEATURE_TELNETD_STANDALONE if (IS_INETD) { |