1775 lines
32 KiB
C
1775 lines
32 KiB
C
/*
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* Copyright (c) 1983, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1983, 1990 The Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#ifdef ID
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static char sccsid[] = "@(#)rlogin.c 5.33 (Berkeley) 3/1/91";
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#endif
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#endif /* not lint */
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/*
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* $Source$
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* $Header: mit/rlogin/RCS/rlogin.c,v 5.2 89/07/26 12:11:21 kfall
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* Exp Locker: kfall $
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*/
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/*
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* rlogin - remote login
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*/
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <net/netlib.h>
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#include <net/hton.h>
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#include <net/gen/in.h>
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#include <netdb.h>
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#include <net/gen/tcp.h>
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#include <net/gen/tcp_io.h>
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#include <termios.h>
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#include <setjmp.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <assert.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdlib.h>
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#ifdef KERBEROS
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#include <kerberosIV/des.h>
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#include <kerberosIV/krb.h>
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CREDENTIALS cred;
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Key_schedule schedule;
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int use_kerberos = 1, doencrypt;
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char dst_realm_buf[REALM_SZ], *dest_realm = NULL;
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extern char *krb_realmofhost();
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#endif
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#ifndef TIOCPKT_WINDOW
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#define TIOCPKT_WINDOW 0x80
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#endif
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/* concession to Sun */
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#ifndef SIGUSR1
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#define SIGUSR1 30
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#endif
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extern int errno;
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int eight, litout, rem;
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int noescape;
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u_char escapechar = '~';
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struct speed
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{
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speed_t speed;
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char *name;
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} speeds[] = {
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{ B0, "0" }, { B50, "50" }, { B75, "75" }, { B110, "110" },
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{ B134, "134" }, { B150, "150" }, { B200, "200" }, { B300, "300" },
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{ B600, "600" }, { B1200, "1200" }, { B1800, "1800" },
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{ B2400, "2400" }, { B4800, "4800" }, { B9600, "9600" },
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{ B19200, "19200" }, { B38400, "38400" }, { B57600, "57600" },
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{ B115200, "115200" },
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{ -1, NULL },
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};
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#if __minix_vmd
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/* flow control variables */
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int more2read_0;
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int inprogress_0;
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int more2write_1;
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int inprogress_1;
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int more2read_rem;
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int inprogress_rd_rem;
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int more2write_rem;
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int inprogress_wr_rem;
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/* write to remote */
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size_t wr_rem_size;
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size_t wr_rem_offset;
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size_t extra_wr_rem_size;
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size_t extra_wr_rem_offset;
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char *extra_wr_rem;
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size_t extra_wr_rem_new_size;
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char *extra_wr_rem_new;
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#endif /* __minix_vmd */
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struct winsize winsize;
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#define get_window_size(fd, wp) ioctl(fd, TIOCGWINSZ, wp)
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extern int main( int argc, char **argv );
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static void usage( void ) __attribute__((noreturn));
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static u_char getescape( char *p );
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static char *speeds2str( speed_t speed );
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static void lostpeer( int sig );
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static void doit( void );
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static void setsignal( int sig, void (*act)(int sig) );
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static void msg( char *str );
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static void done( int status );
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#if !__minix_vmd
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static int reader( void );
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#endif
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static void mode( int f );
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#if __minix_vmd
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static void mark_async( int fd );
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static void init_0( void );
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static void init_1( void );
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static void init_rd_rem( void );
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static void init_wr_rem( void );
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static void restart_0( void );
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static void restart_1( void );
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static void restart_rd_rem( void );
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static void restart_wr_rem( void );
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static void completed_0( int result, int error );
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static void completed_1( int result, int error );
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static void completed_rd_rem( int result, int error );
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static void completed_wr_rem( int result, int error );
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static void do_urg( int urg_byte );
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#endif
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#if !__minix_vmd
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static void catch_child( int sig );
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static void writer( void );
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#endif
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static void echo( int c );
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#if __minix_vmd
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static void finish( void );
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static void sendwindow( void );
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static void sigwinch( int sig );
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static void subshell( void );
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#endif
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int main(argc, argv)
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int argc;
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char **argv;
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{
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extern char *optarg;
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extern int optind;
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struct passwd *pw;
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struct servent *sp;
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struct termios ttyb;
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nwio_tcpopt_t tcpopt;
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int error;
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int argoff, ch, dflag, one, uid;
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char *host, *p, *user, term[1024];
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argoff = dflag = 0;
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one = 1;
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host = user = NULL;
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if ((p = rindex(argv[0], '/')))
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++p;
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else
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p = argv[0];
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if (strcmp(p, "rlogin"))
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host = p;
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/* handle "rlogin host flags" */
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if (!host && argc > 2 && argv[1][0] != '-') {
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host = argv[1];
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argoff = 1;
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}
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#ifdef KERBEROS
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#define OPTIONS "8EKLde:k:l:x"
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#else
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#define OPTIONS "8EKLde:l:"
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#endif
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while ((ch = getopt(argc - argoff, argv + argoff, OPTIONS)) != EOF)
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switch(ch) {
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case '8':
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eight = 1;
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break;
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case 'E':
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noescape = 1;
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break;
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case 'K':
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#ifdef KERBEROS
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use_kerberos = 0;
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#endif
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break;
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case 'L':
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litout = 1;
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break;
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case 'd':
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dflag = 1;
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break;
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case 'e':
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escapechar = getescape(optarg);
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break;
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#ifdef KERBEROS
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case 'k':
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dest_realm = dst_realm_buf;
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(void)strncpy(dest_realm, optarg, REALM_SZ);
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break;
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#endif
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case 'l':
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user = optarg;
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break;
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#ifdef CRYPT
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#ifdef KERBEROS
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case 'x':
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doencrypt = 1;
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des_set_key(cred.session, schedule);
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break;
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#endif
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#endif
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case '?':
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default:
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usage();
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}
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optind += argoff;
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argc -= optind;
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argv += optind;
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/* if haven't gotten a host yet, do so */
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if (!host && !(host = *argv++))
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usage();
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if (*argv)
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usage();
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if (!(pw = getpwuid(uid = getuid()))) {
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(void)fprintf(stderr, "rlogin: unknown user id.\n");
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exit(1);
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}
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if (!user)
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user = pw->pw_name;
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sp = NULL;
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#ifdef KERBEROS
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if (use_kerberos) {
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sp = getservbyname((doencrypt ? "eklogin" : "klogin"), "tcp");
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if (sp == NULL) {
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use_kerberos = 0;
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warning("can't get entry for %s/tcp service",
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doencrypt ? "eklogin" : "klogin");
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}
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}
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#endif
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if (sp == NULL)
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sp = getservbyname("login", "tcp");
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if (sp == NULL) {
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(void)fprintf(stderr, "rlogin: login/tcp: unknown service.\n");
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exit(1);
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}
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(void)strncpy(term, (p = getenv("TERM")) ? p : "network", sizeof(term));
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term[sizeof(term)-1]= 0;
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if (tcgetattr(0, &ttyb) == 0) {
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(void)strcat(term, "/");
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(void)strcat(term, speeds2str(cfgetospeed(&ttyb)));
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}
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(void)get_window_size(0, &winsize);
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(void)signal(SIGPIPE, lostpeer);
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#ifdef KERBEROS
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try_connect:
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if (use_kerberos) {
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rem = KSUCCESS;
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errno = 0;
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if (dest_realm == NULL)
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dest_realm = krb_realmofhost(host);
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#ifdef CRYPT
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if (doencrypt)
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rem = krcmd_mutual(&host, sp->s_port, user, term, 0,
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dest_realm, &cred, schedule);
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else
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#endif /* CRYPT */
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rem = krcmd(&host, sp->s_port, user, term, 0,
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dest_realm);
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if (rem < 0) {
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use_kerberos = 0;
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sp = getservbyname("login", "tcp");
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if (sp == NULL) {
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(void)fprintf(stderr,
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"rlogin: unknown service login/tcp.\n");
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exit(1);
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}
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if (errno == ECONNREFUSED)
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warning("remote host doesn't support Kerberos");
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if (errno == ENOENT)
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warning("can't provide Kerberos auth data");
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goto try_connect;
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}
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} else {
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#ifdef CRYPT
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if (doencrypt) {
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(void)fprintf(stderr,
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"rlogin: the -x flag requires Kerberos authentication.\n");
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exit(1);
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}
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#endif /* CRYPT */
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rem = rcmd(&host, sp->s_port, pw->pw_name, user, term, 0);
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}
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#else
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rem = rcmd(&host, sp->s_port, pw->pw_name, user, term, 0);
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#endif /* KERBEROS */
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if (rem < 0)
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exit(1);
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/* Enable BSD compatibility for urgent data. */
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tcpopt.nwto_flags= NWTO_BSD_URG;
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error= ioctl(rem, NWIOSTCPOPT, &tcpopt);
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if (error == -1)
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{
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fprintf(stderr, "rlogin: NWIOSTCPOPT failed: %s\n",
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strerror(errno));
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}
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(void)setuid(uid);
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doit();
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/*NOTREACHED*/
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}
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struct termios defattr, rawattr;
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#if __minix_vmd
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int mustsendwindow;
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#else
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int child;
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#endif
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static void
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doit()
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{
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struct termios sb;
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#if !__minix_vmd
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int r;
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#else
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asio_fd_set_t fd_set;
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struct fwait fw;
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int result;
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#endif
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(void)tcgetattr(0, &sb);
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defattr = sb;
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rawattr = sb;
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rawattr.c_iflag &= ~(ICRNL | IGNCR | INLCR | ISTRIP | IXOFF | IXON |
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PARMRK | IXANY);
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rawattr.c_oflag &= ~(OPOST);
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rawattr.c_lflag &= ~(ECHONL | ECHO | ICANON | IEXTEN | ISIG);
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(void)signal(SIGINT, SIG_IGN);
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setsignal(SIGHUP, exit);
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setsignal(SIGQUIT, exit);
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#if !__minix_vmd
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child = fork();
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if (child == -1) {
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(void)fprintf(stderr, "rlogin: fork: %s.\n", strerror(errno));
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done(1);
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}
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if (child == 0) {
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mode(1);
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r = reader();
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if (r == 0) {
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msg("connection closed.");
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exit(0);
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}
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sleep(1);
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msg("\007connection closed.");
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exit(1);
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}
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(void)signal(SIGCHLD, catch_child);
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writer();
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#else /* __minix_vmd */
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mode(1);
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/* mark the file descriptors 0, 1, and rem as asynchronous. */
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mark_async(0);
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mark_async(1);
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mark_async(rem);
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init_0();
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init_1();
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init_rd_rem();
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init_wr_rem();
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for (;;)
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{
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ASIO_FD_ZERO(&fd_set);
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fw.fw_flags= 0;
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fw.fw_bits= fd_set.afds_bits;
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fw.fw_maxfd= ASIO_FD_SETSIZE;
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|
|
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if (more2read_0 && !inprogress_0)
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{
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|
restart_0();
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fw.fw_flags |= FWF_NONBLOCK;
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}
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|
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if (more2write_1 && !inprogress_1)
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{
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restart_1();
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fw.fw_flags |= FWF_NONBLOCK;
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}
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|
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if (more2read_rem && !inprogress_rd_rem)
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{
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restart_rd_rem();
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fw.fw_flags |= FWF_NONBLOCK;
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}
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|
|
if (more2write_rem && !inprogress_wr_rem)
|
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{
|
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restart_wr_rem();
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fw.fw_flags |= FWF_NONBLOCK;
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}
|
|
|
|
if (more2read_0 && inprogress_0)
|
|
ASIO_FD_SET(0, ASIO_READ, &fd_set);
|
|
if (more2write_1 && inprogress_1)
|
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ASIO_FD_SET(1, ASIO_WRITE, &fd_set);
|
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if (more2read_rem && inprogress_rd_rem)
|
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ASIO_FD_SET(rem, ASIO_READ, &fd_set);
|
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if (more2write_rem && inprogress_wr_rem)
|
|
ASIO_FD_SET(rem, ASIO_WRITE, &fd_set);
|
|
|
|
for (;;)
|
|
{
|
|
result= fwait(&fw);
|
|
if (result == -1 && (errno == EAGAIN ||
|
|
errno == EINTR))
|
|
{
|
|
break;
|
|
}
|
|
if (result == -1)
|
|
{
|
|
fprintf(stderr, "fwait failed (%s)\n",
|
|
strerror(errno));
|
|
exit(1);
|
|
}
|
|
assert(result == 0);
|
|
#if 0
|
|
printf("fwait: fw_fw= %d, fw_operation= %d, fw_result= %d, fw.fw_errno= %d\n",
|
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fw.fw_fd, fw.fw_operation, fw.fw_result, fw.fw_errno);
|
|
#endif
|
|
if (fw.fw_fd == 0 && fw.fw_operation == ASIO_READ)
|
|
{
|
|
completed_0(fw.fw_result, fw.fw_errno);
|
|
}
|
|
else if (fw.fw_fd == 1 &&
|
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fw.fw_operation == ASIO_WRITE)
|
|
{
|
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completed_1(fw.fw_result, fw.fw_errno);
|
|
}
|
|
else if (fw.fw_fd == rem &&
|
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fw.fw_operation == ASIO_READ)
|
|
{
|
|
completed_rd_rem(fw.fw_result, fw.fw_errno);
|
|
}
|
|
else if (fw.fw_fd == rem &&
|
|
fw.fw_operation == ASIO_WRITE)
|
|
{
|
|
completed_wr_rem(fw.fw_result, fw.fw_errno);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr,
|
|
"strange result from fwait: fd= %d, operation= %d\n",
|
|
fw.fw_fd, fw.fw_operation);
|
|
exit(1);
|
|
}
|
|
if (!(fw.fw_flags & FWF_MORE))
|
|
break;
|
|
}
|
|
if (mustsendwindow)
|
|
{
|
|
mustsendwindow= 0;
|
|
sendwindow();
|
|
}
|
|
}
|
|
#endif /* __minix_vmd */
|
|
msg("connection closed.");
|
|
done(0);
|
|
}
|
|
|
|
/* trap a signal, unless it is being ignored. */
|
|
static void
|
|
setsignal(sig, act)
|
|
int sig;
|
|
void(*act) ( int sig );
|
|
{
|
|
if (signal(sig, act) == SIG_IGN)
|
|
(void)signal(sig, SIG_IGN);
|
|
}
|
|
|
|
static void
|
|
done(status)
|
|
int status;
|
|
{
|
|
int w, wstatus;
|
|
|
|
mode(0);
|
|
#if !__minix_vmd
|
|
if (child > 0) {
|
|
/* make sure catch_child does not snap it up */
|
|
(void)signal(SIGCHLD, SIG_DFL);
|
|
if (kill(child, SIGKILL) >= 0)
|
|
while ((w = wait(&wstatus)) > 0 && w != child);
|
|
}
|
|
#endif
|
|
exit(status);
|
|
}
|
|
|
|
int dosigwinch;
|
|
#if !__minix
|
|
void sigwinch();
|
|
#endif
|
|
|
|
#if !__minix_vmd
|
|
static void
|
|
catch_child(sig)
|
|
int sig;
|
|
{
|
|
int status;
|
|
int pid;
|
|
|
|
for (;;) {
|
|
pid = waitpid(-1, &status, WNOHANG|WUNTRACED);
|
|
if (pid == 0)
|
|
return;
|
|
/* if the child (reader) dies, just quit */
|
|
if (pid < 0 || ((pid == child) && (!WIFSTOPPED(status))))
|
|
done(WTERMSIG(status) | WEXITSTATUS(status));
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
#endif
|
|
|
|
#if !__minix_vmd
|
|
/*
|
|
* writer: write to remote: 0 -> line.
|
|
* ~. terminate
|
|
* ~^Z suspend rlogin process.
|
|
* ~<delayed-suspend char> suspend rlogin process, but leave reader alone.
|
|
*/
|
|
static void
|
|
writer()
|
|
{
|
|
register int bol, local, n;
|
|
u_char ch;
|
|
int c;
|
|
|
|
bol = 1; /* beginning of line */
|
|
local = 0;
|
|
for (;;) {
|
|
n = read(STDIN_FILENO, &ch, 1);
|
|
if (n <= 0) {
|
|
if (n < 0 && errno == EINTR)
|
|
continue;
|
|
break;
|
|
}
|
|
c = ch;
|
|
/*
|
|
* If we're at the beginning of the line and recognize a
|
|
* command character, then we echo locally. Otherwise,
|
|
* characters are echo'd remotely. If the command character
|
|
* is doubled, this acts as a force and local echo is
|
|
* suppressed.
|
|
*/
|
|
if (bol) {
|
|
bol = 0;
|
|
if (!noescape && c == escapechar) {
|
|
local = 1;
|
|
continue;
|
|
}
|
|
} else if (local) {
|
|
local = 0;
|
|
if (c == '.' || c == defattr.c_cc[VEOF]) {
|
|
echo(c);
|
|
break;
|
|
}
|
|
#if !__minix
|
|
if (c == defattr.c_cc[VSUSP]) {
|
|
bol = 1;
|
|
echo(c);
|
|
stop(c);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (c != escapechar)
|
|
#ifdef CRYPT
|
|
#ifdef KERBEROS
|
|
if (doencrypt)
|
|
(void)des_write(rem, &escapechar, 1);
|
|
else
|
|
#endif
|
|
#endif
|
|
(void)write(rem, &escapechar, 1);
|
|
}
|
|
|
|
ch = c;
|
|
#ifdef CRYPT
|
|
#ifdef KERBEROS
|
|
if (doencrypt) {
|
|
if (des_write(rem, &ch, 1) == 0) {
|
|
msg("line gone");
|
|
break;
|
|
}
|
|
} else
|
|
#endif
|
|
#endif
|
|
if (write(rem, &ch, 1) == 0) {
|
|
msg("line gone");
|
|
break;
|
|
}
|
|
bol = c == defattr.c_cc[VKILL] ||
|
|
c == defattr.c_cc[VEOF] ||
|
|
c == defattr.c_cc[VINTR] ||
|
|
c == defattr.c_cc[VSUSP] ||
|
|
c == '\r' || c == '\n';
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if !__minix_vmd
|
|
static void
|
|
echo(c)
|
|
int c;
|
|
{
|
|
register char *p;
|
|
char buf[8];
|
|
|
|
p = buf;
|
|
c &= 0177;
|
|
*p++ = escapechar;
|
|
if (c < ' ') {
|
|
*p++ = '^';
|
|
*p++ = c + '@';
|
|
} else if (c == 0177) {
|
|
*p++ = '^';
|
|
*p++ = '?';
|
|
} else
|
|
*p++ = c;
|
|
*p++ = '\r';
|
|
*p++ = '\n';
|
|
(void)write(STDOUT_FILENO, buf, p - buf);
|
|
}
|
|
#endif
|
|
|
|
#if !__minix
|
|
stop(cmdc)
|
|
char cmdc;
|
|
{
|
|
mode(0);
|
|
(void)signal(SIGCHLD, SIG_IGN);
|
|
(void)kill(cmdc == defltc.t_suspc ? 0 : getpid(), SIGTSTP);
|
|
(void)signal(SIGCHLD, catch_child);
|
|
mode(1);
|
|
sigwinch(); /* check for size changes */
|
|
}
|
|
#endif
|
|
|
|
#if __minix_vmd
|
|
#ifdef SIGWINCH
|
|
static void
|
|
sigwinch(sig)
|
|
int sig;
|
|
{
|
|
struct winsize ws;
|
|
|
|
#if __minix
|
|
signal(SIGWINCH, sigwinch);
|
|
#endif
|
|
|
|
if (dosigwinch && get_window_size(0, &ws) == 0 &&
|
|
memcmp(&ws, &winsize, sizeof(ws))) {
|
|
winsize = ws;
|
|
mustsendwindow= 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Send the window size to the server via the magic escape
|
|
*/
|
|
static void
|
|
sendwindow()
|
|
{
|
|
struct winsize *wp;
|
|
char *obuf, *new_buf;
|
|
|
|
new_buf= realloc(extra_wr_rem_new,
|
|
extra_wr_rem_new_size+4+sizeof(*wp));
|
|
if (new_buf == 0)
|
|
return;
|
|
extra_wr_rem_new= new_buf;
|
|
obuf= new_buf+extra_wr_rem_new_size;
|
|
extra_wr_rem_new_size += 4+sizeof(*wp);
|
|
|
|
more2read_0= 0;
|
|
more2write_rem= 1;
|
|
|
|
wp = (struct winsize *)(obuf+4);
|
|
obuf[0] = 0377;
|
|
obuf[1] = 0377;
|
|
obuf[2] = 's';
|
|
obuf[3] = 's';
|
|
wp->ws_row = htons(winsize.ws_row);
|
|
wp->ws_col = htons(winsize.ws_col);
|
|
wp->ws_xpixel = htons(winsize.ws_xpixel);
|
|
wp->ws_ypixel = htons(winsize.ws_ypixel);
|
|
}
|
|
#endif /* SIGWINCH */
|
|
#endif
|
|
|
|
#if !__minix_vmd
|
|
/*
|
|
* reader: read from remote: line -> 1
|
|
*/
|
|
#define READING 1
|
|
#define WRITING 2
|
|
|
|
int rcvcnt, rcvstate;
|
|
char rcvbuf[8 * 1024];
|
|
|
|
static int
|
|
reader()
|
|
{
|
|
int n, remaining;
|
|
char *bufp = rcvbuf;
|
|
|
|
for (;;) {
|
|
while ((remaining = rcvcnt - (bufp - rcvbuf)) > 0) {
|
|
rcvstate = WRITING;
|
|
n = write(STDOUT_FILENO, bufp, remaining);
|
|
if (n < 0) {
|
|
if (errno != EINTR)
|
|
return(-1);
|
|
continue;
|
|
}
|
|
bufp += n;
|
|
}
|
|
bufp = rcvbuf;
|
|
rcvcnt = 0;
|
|
rcvstate = READING;
|
|
|
|
#ifdef CRYPT
|
|
#ifdef KERBEROS
|
|
if (doencrypt)
|
|
rcvcnt = des_read(rem, rcvbuf, sizeof(rcvbuf));
|
|
else
|
|
#endif
|
|
#endif
|
|
rcvcnt = read(rem, rcvbuf, sizeof (rcvbuf));
|
|
if (rcvcnt == 0)
|
|
return (0);
|
|
if (rcvcnt < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
if (errno == EURG) {
|
|
nwio_tcpopt_t tcpopt;
|
|
#if DEBUG
|
|
fprintf(stderr, "\n\rEURG\n\r");
|
|
#endif
|
|
tcpopt.nwto_flags= NWTO_RCV_URG;
|
|
if (ioctl(rem, NWIOSTCPOPT, &tcpopt) == -1) {
|
|
fprintf(stderr,
|
|
"rlogin: trouble with urgent data: %s\n",
|
|
strerror(errno));
|
|
return(-1);
|
|
}
|
|
continue;
|
|
}
|
|
if (errno == ENOURG) {
|
|
nwio_tcpopt_t tcpopt;
|
|
#if DEBUG
|
|
fprintf(stderr, "\n\rENOURG\n\r");
|
|
#endif
|
|
tcpopt.nwto_flags= NWTO_RCV_NOTURG;
|
|
if (ioctl(rem, NWIOSTCPOPT, &tcpopt) == -1) {
|
|
fprintf(stderr,
|
|
"rlogin: trouble with not-urgent data: %s\n",
|
|
strerror(errno));
|
|
return(-1);
|
|
}
|
|
continue;
|
|
}
|
|
(void)fprintf(stderr, "rlogin: read: %s\n",
|
|
strerror(errno));
|
|
return(-1);
|
|
}
|
|
}
|
|
}
|
|
#endif /* !__minix_vmd */
|
|
|
|
static void
|
|
mode(f)
|
|
int f;
|
|
{
|
|
struct termios *sb;
|
|
|
|
switch(f) {
|
|
case 0:
|
|
sb= &defattr;
|
|
break;
|
|
case 1:
|
|
sb= &rawattr;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
(void)tcsetattr(0, TCSAFLUSH, sb);
|
|
}
|
|
|
|
static void
|
|
lostpeer(sig)
|
|
int sig;
|
|
{
|
|
(void)signal(SIGPIPE, SIG_IGN);
|
|
msg("\007connection closed.");
|
|
done(1);
|
|
}
|
|
|
|
static void
|
|
msg(str)
|
|
char *str;
|
|
{
|
|
(void)fprintf(stderr, "rlogin: %s\r\n", str);
|
|
}
|
|
|
|
#ifdef KERBEROS
|
|
/* VARARGS */
|
|
warning(va_alist)
|
|
va_dcl
|
|
{
|
|
va_list ap;
|
|
char *fmt;
|
|
|
|
(void)fprintf(stderr, "rlogin: warning, using standard rlogin: ");
|
|
va_start(ap);
|
|
fmt = va_arg(ap, char *);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
(void)fprintf(stderr, ".\n");
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"Usage: rlogin [-%s]%s[-e char] [-l username] host\n",
|
|
#ifdef KERBEROS
|
|
#ifdef CRYPT
|
|
"8ELx", " [-k realm] ");
|
|
#else
|
|
"8EL", " [-k realm] ");
|
|
#endif
|
|
#else
|
|
"8EL", " ");
|
|
#endif
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* The following routine provides compatibility (such as it is) between 4.2BSD
|
|
* Suns and others. Suns have only a `ttysize', so we convert it to a winsize.
|
|
*/
|
|
#ifdef sun
|
|
get_window_size(fd, wp)
|
|
int fd;
|
|
struct winsize *wp;
|
|
{
|
|
struct ttysize ts;
|
|
int error;
|
|
|
|
if ((error = ioctl(0, TIOCGSIZE, &ts)) != 0)
|
|
return(error);
|
|
wp->ws_row = ts.ts_lines;
|
|
wp->ws_col = ts.ts_cols;
|
|
wp->ws_xpixel = 0;
|
|
wp->ws_ypixel = 0;
|
|
return(0);
|
|
}
|
|
#endif
|
|
|
|
static u_char
|
|
getescape(p)
|
|
register char *p;
|
|
{
|
|
long val;
|
|
int len;
|
|
|
|
if ((len = strlen(p)) == 1) /* use any single char, including '\' */
|
|
return((u_char)*p);
|
|
/* otherwise, \nnn */
|
|
if (*p == '\\' && len >= 2 && len <= 4) {
|
|
val = strtol(++p, (char **)NULL, 8);
|
|
for (;;) {
|
|
if (!*++p)
|
|
return((u_char)val);
|
|
if (*p < '0' || *p > '8')
|
|
break;
|
|
}
|
|
}
|
|
msg("illegal option value -- e");
|
|
usage();
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static char *
|
|
speeds2str(speed)
|
|
speed_t speed;
|
|
{
|
|
int i;
|
|
for (i= 0; speeds[i].name != NULL && speeds[i].speed != speed; i++) {
|
|
if (speeds[i].speed == speed) return speeds[i].name;
|
|
}
|
|
return "unknown";
|
|
}
|
|
|
|
#if __minix_vmd
|
|
static void
|
|
mark_async(fd)
|
|
int fd;
|
|
{
|
|
int result;
|
|
int v;
|
|
|
|
result= fcntl(fd, F_GETFD);
|
|
if (result == -1)
|
|
{
|
|
fprintf(stderr,
|
|
"rlogin: mark_async: fcntl(%d, GETFD) failed (%s)\n",
|
|
fd, strerror(errno));
|
|
exit(1);
|
|
}
|
|
v= result | FD_ASYNCHIO;
|
|
result= fcntl(fd, F_SETFD, v);
|
|
if (result == -1)
|
|
{
|
|
fprintf(stderr,
|
|
"rlogin: mark_async: fcntl(%d, SETFD, %d) failed (%s)\n",
|
|
fd, v, strerror(errno));
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#define RD_0_BUFSIZE 256
|
|
char rd_0_buf[RD_0_BUFSIZE];
|
|
size_t rd_0_offset;
|
|
|
|
static void
|
|
init_0()
|
|
{
|
|
more2read_0= 1;
|
|
inprogress_0= 0;
|
|
rd_0_offset= 0;
|
|
}
|
|
|
|
size_t wr_1_size;
|
|
size_t wr_1_offset;
|
|
char *urg_1;
|
|
size_t urg_1_size;
|
|
char *extra_1;
|
|
size_t extra_1_size;
|
|
size_t extra_1_offset;
|
|
char *extra_1_new;
|
|
size_t extra_1_new_size;
|
|
#define MAX_EXTRA_1_NEW_SIZE (16*1024)
|
|
|
|
static void
|
|
init_1()
|
|
{
|
|
more2write_1= 0;
|
|
inprogress_1= 0;
|
|
wr_1_size= 0;
|
|
wr_1_offset= 0;
|
|
urg_1= NULL;
|
|
urg_1_size= 0;
|
|
extra_1= NULL;
|
|
extra_1_size= 0;
|
|
extra_1_offset= 0;
|
|
extra_1_new= NULL;
|
|
extra_1_new_size= 0;
|
|
}
|
|
|
|
#define RD_REM_BUFSIZE (8*1024)
|
|
char rd_rem_buf[RD_REM_BUFSIZE];
|
|
size_t rd_rem_offset;
|
|
int rd_rem_urg;
|
|
|
|
static void
|
|
init_rd_rem()
|
|
{
|
|
more2read_rem= 1;
|
|
inprogress_rd_rem= 0;
|
|
rd_rem_offset= 0;
|
|
rd_rem_urg= 0;
|
|
}
|
|
|
|
static void
|
|
init_wr_rem()
|
|
{
|
|
more2write_rem= 0;
|
|
inprogress_wr_rem= 0;
|
|
wr_rem_size= 0;
|
|
wr_rem_offset= 0;
|
|
extra_wr_rem_size= 0;
|
|
extra_wr_rem_offset= 0;
|
|
extra_wr_rem= NULL;
|
|
extra_wr_rem_new_size= 0;
|
|
extra_wr_rem_new= NULL;
|
|
}
|
|
|
|
static void
|
|
restart_0()
|
|
{
|
|
size_t offset;
|
|
int result, error;
|
|
|
|
assert(!inprogress_0);
|
|
rd_0_offset= 1;
|
|
offset= 0;
|
|
while (offset < RD_0_BUFSIZE)
|
|
{
|
|
result= read(0, rd_0_buf+rd_0_offset+offset,
|
|
RD_0_BUFSIZE-rd_0_offset-offset);
|
|
if (result > 0)
|
|
{
|
|
offset += result;
|
|
assert(rd_0_offset+offset <= RD_0_BUFSIZE);
|
|
continue;
|
|
}
|
|
error= errno;
|
|
|
|
if (offset != 0)
|
|
completed_0(offset, 0);
|
|
rd_0_offset += offset;
|
|
if (result == -1 && error == EINPROGRESS)
|
|
{
|
|
inprogress_0= 1;
|
|
return;
|
|
}
|
|
completed_0(result, error);
|
|
return;
|
|
}
|
|
completed_0(offset, 0);
|
|
}
|
|
|
|
static void
|
|
restart_1()
|
|
{
|
|
size_t offset;
|
|
int result, error;
|
|
|
|
assert(!inprogress_1);
|
|
|
|
while (extra_1 != NULL || extra_1_new != NULL)
|
|
{
|
|
if (extra_1 == NULL)
|
|
{
|
|
extra_1= extra_1_new;
|
|
extra_1_new= NULL;
|
|
extra_1_size= extra_1_new_size;
|
|
extra_1_new_size= 0;
|
|
extra_1_offset= 0;
|
|
}
|
|
offset= 0;
|
|
#if DEBUG
|
|
if (extra_1_size == 0)
|
|
fprintf(stderr, "restart_1: extra_1_size= 0\n");
|
|
#endif
|
|
while (offset < extra_1_size)
|
|
{
|
|
result= write(1, extra_1+extra_1_offset+offset,
|
|
extra_1_size-offset);
|
|
if (result > 0)
|
|
{
|
|
assert (result <= extra_1_size-offset);
|
|
offset += result;
|
|
continue;
|
|
}
|
|
error= errno;
|
|
if (offset != 0)
|
|
completed_1(offset, 0);
|
|
|
|
if (result == -1 && errno == EINPROGRESS)
|
|
{
|
|
inprogress_1= 1;
|
|
return;
|
|
}
|
|
completed_1(result, errno);
|
|
return;
|
|
}
|
|
completed_1(offset, 0);
|
|
}
|
|
|
|
offset= 0;
|
|
|
|
if (wr_1_size == 0)
|
|
{
|
|
more2write_1= 0;
|
|
more2read_rem= 1;
|
|
return;
|
|
}
|
|
|
|
while (offset < wr_1_size)
|
|
{
|
|
result= write(1, rd_rem_buf+wr_1_offset+offset,
|
|
wr_1_size-offset);
|
|
if (result > 0)
|
|
{
|
|
assert (result <= wr_1_size-offset);
|
|
offset += result;
|
|
continue;
|
|
}
|
|
error= errno;
|
|
if (offset != 0)
|
|
completed_1(offset, 0);
|
|
|
|
if (result == -1 && errno == EINPROGRESS)
|
|
{
|
|
inprogress_1= 1;
|
|
return;
|
|
}
|
|
completed_1(result, errno);
|
|
return;
|
|
}
|
|
completed_1(offset, 0);
|
|
}
|
|
|
|
static void
|
|
restart_rd_rem()
|
|
{
|
|
size_t offset;
|
|
int result, error;
|
|
|
|
assert(!inprogress_rd_rem);
|
|
rd_rem_offset= 0;
|
|
offset= 0;
|
|
while (offset < RD_REM_BUFSIZE)
|
|
{
|
|
result= read(rem, rd_rem_buf+offset, RD_REM_BUFSIZE-offset);
|
|
if (result > 0)
|
|
{
|
|
offset += result;
|
|
assert(offset <= RD_REM_BUFSIZE);
|
|
continue;
|
|
}
|
|
error= errno;
|
|
|
|
if (offset != 0)
|
|
completed_rd_rem(offset, 0);
|
|
rd_rem_offset= offset;
|
|
if (result == -1 && error == EINPROGRESS)
|
|
{
|
|
inprogress_rd_rem= 1;
|
|
return;
|
|
}
|
|
completed_rd_rem(result, error);
|
|
return;
|
|
}
|
|
completed_rd_rem(offset, 0);
|
|
}
|
|
|
|
static void
|
|
restart_wr_rem()
|
|
{
|
|
size_t offset;
|
|
int result, error;
|
|
|
|
assert(!inprogress_wr_rem);
|
|
|
|
if (extra_wr_rem_new != NULL && extra_wr_rem == NULL)
|
|
{
|
|
extra_wr_rem= extra_wr_rem_new;
|
|
extra_wr_rem_size= extra_wr_rem_new_size;
|
|
extra_wr_rem_offset= 0;
|
|
extra_wr_rem_new= NULL;
|
|
extra_wr_rem_new_size= 0;
|
|
}
|
|
if (extra_wr_rem != NULL)
|
|
{
|
|
offset= 0;
|
|
while (offset < extra_wr_rem_size)
|
|
{
|
|
result= write(rem,
|
|
extra_wr_rem+extra_wr_rem_offset+offset,
|
|
extra_wr_rem_size-offset);
|
|
if (result > 0)
|
|
{
|
|
assert (result <= extra_wr_rem_size-offset);
|
|
offset += result;
|
|
continue;
|
|
}
|
|
error= errno;
|
|
if (offset != 0)
|
|
completed_wr_rem(offset, 0);
|
|
|
|
if (result == -1 && errno == EINPROGRESS)
|
|
{
|
|
inprogress_wr_rem= 1;
|
|
return;
|
|
}
|
|
completed_wr_rem(result, errno);
|
|
return;
|
|
}
|
|
completed_wr_rem(offset, 0);
|
|
}
|
|
if (wr_rem_size == 0)
|
|
return;
|
|
|
|
offset= 0;
|
|
while (offset < wr_rem_size)
|
|
{
|
|
result= write(rem, rd_0_buf+wr_rem_offset+offset,
|
|
wr_rem_size-offset);
|
|
if (result > 0)
|
|
{
|
|
assert (result <= wr_rem_size-offset);
|
|
offset += result;
|
|
continue;
|
|
}
|
|
error= errno;
|
|
if (offset != 0)
|
|
completed_wr_rem(offset, 0);
|
|
|
|
if (result == -1 && errno == EINPROGRESS)
|
|
{
|
|
inprogress_wr_rem= 1;
|
|
return;
|
|
}
|
|
completed_wr_rem(result, errno);
|
|
return;
|
|
}
|
|
completed_wr_rem(offset, 0);
|
|
}
|
|
|
|
static void
|
|
completed_0(result, error)
|
|
int result;
|
|
int error;
|
|
{
|
|
static int bol= 0, local= 0;
|
|
|
|
char *iptr, *optr;
|
|
int i;
|
|
u_char c;
|
|
|
|
inprogress_0= 0;
|
|
|
|
if (result > 0)
|
|
{
|
|
assert(rd_0_offset > 0);
|
|
wr_rem_offset= 1;
|
|
|
|
iptr= rd_0_buf+rd_0_offset;
|
|
optr= rd_0_buf+wr_rem_offset;
|
|
for (i= 0; i<result; iptr++, i++)
|
|
{
|
|
c= *iptr;
|
|
if (bol)
|
|
{
|
|
bol= 0;
|
|
if (!noescape && c == escapechar)
|
|
{
|
|
local= 1;
|
|
continue;
|
|
}
|
|
}
|
|
else if (local)
|
|
{
|
|
local= 0;
|
|
if (c == '.' || (c != _POSIX_VDISABLE &&
|
|
c == defattr.c_cc[VEOF]))
|
|
{
|
|
echo(c);
|
|
finish();
|
|
/* NOTREACHED */
|
|
}
|
|
if (c == '!')
|
|
{
|
|
subshell();
|
|
continue;
|
|
}
|
|
if (c != escapechar)
|
|
{
|
|
if (optr < iptr)
|
|
{
|
|
*(optr++)= escapechar;
|
|
}
|
|
else
|
|
{
|
|
assert(optr == iptr);
|
|
assert(iptr == rd_0_buf+
|
|
rd_0_offset);
|
|
assert(rd_0_offset > 0);
|
|
wr_rem_offset--;
|
|
optr[-1]= escapechar;
|
|
}
|
|
}
|
|
}
|
|
*(optr++)= c;
|
|
bol= (c != _POSIX_VDISABLE) &&
|
|
(c == defattr.c_cc[VKILL] ||
|
|
c == defattr.c_cc[VEOF] ||
|
|
c == defattr.c_cc[VINTR] ||
|
|
c == defattr.c_cc[VSUSP] ||
|
|
c == '\r' || c == '\n');
|
|
}
|
|
wr_rem_size += optr-rd_0_buf-wr_rem_offset;
|
|
if (wr_rem_size != 0)
|
|
{
|
|
more2read_0= 0;
|
|
more2write_rem= 1;
|
|
}
|
|
return;
|
|
} else
|
|
if (result < 0) {
|
|
fprintf(stderr, "rlogin: %s\n", strerror(error));
|
|
}
|
|
done(1);
|
|
}
|
|
|
|
static void
|
|
completed_1(result, error)
|
|
int result;
|
|
int error;
|
|
{
|
|
inprogress_1= 0;
|
|
|
|
if (result > 0)
|
|
{
|
|
if (extra_1 != NULL)
|
|
{
|
|
assert (result <= extra_1_size);
|
|
extra_1_size -= result;
|
|
extra_1_offset += result;
|
|
if (extra_1_size == 0)
|
|
{
|
|
more2write_1= 0;
|
|
more2read_rem= 1;
|
|
free(extra_1);
|
|
extra_1= NULL;
|
|
}
|
|
return;
|
|
}
|
|
assert (result <= wr_1_size);
|
|
wr_1_size -= result;
|
|
wr_1_offset += result;
|
|
if (wr_1_size == 0)
|
|
{
|
|
more2write_1= 0;
|
|
more2read_rem= 1;
|
|
}
|
|
return;
|
|
} else
|
|
if (result < 0) {
|
|
fprintf(stderr, "rlogin: %s\n", strerror(error));
|
|
}
|
|
done(1);
|
|
}
|
|
|
|
static void
|
|
completed_rd_rem(result, error)
|
|
int result;
|
|
int error;
|
|
{
|
|
nwio_tcpopt_t tcpopt;
|
|
char *new_buf;
|
|
size_t keep_size;
|
|
u_char urg_byte;
|
|
int i;
|
|
|
|
inprogress_rd_rem= 0;
|
|
|
|
if (result > 0)
|
|
{
|
|
if (rd_rem_urg)
|
|
{
|
|
#if DEBUG
|
|
fprintf(stderr, "\n\r%d urg bytes\n\r", result);
|
|
#endif
|
|
if (urg_1_size > MAX_EXTRA_1_NEW_SIZE)
|
|
{
|
|
keep_size= MAX_EXTRA_1_NEW_SIZE/2;
|
|
memmove(urg_1, urg_1+urg_1_size-keep_size,
|
|
keep_size);
|
|
urg_1_size= keep_size;
|
|
}
|
|
new_buf= realloc(urg_1, urg_1_size+result);
|
|
if (new_buf == NULL)
|
|
{
|
|
fprintf(stderr,
|
|
"rlogin: warning realloc %d failed\n",
|
|
urg_1_size+result);
|
|
return;
|
|
}
|
|
memcpy(new_buf+urg_1_size,
|
|
rd_rem_buf+rd_rem_offset, result);
|
|
urg_1= new_buf;
|
|
urg_1_size += result;
|
|
return;
|
|
}
|
|
more2read_rem= 0;
|
|
more2write_1= 1;
|
|
wr_1_size= result;
|
|
wr_1_offset= rd_rem_offset;
|
|
return;
|
|
}
|
|
if (result == -1 && error == EURG)
|
|
{
|
|
#if DEBUG
|
|
fprintf(stderr, "\n\rEURG\n\r");
|
|
#endif
|
|
rd_rem_urg= 1;
|
|
tcpopt.nwto_flags= NWTO_RCV_URG;
|
|
result= ioctl(rem, NWIOSTCPOPT, &tcpopt);
|
|
if (result == -1)
|
|
{
|
|
fprintf(stderr,
|
|
"rlogin: NWIOSTCPOPT on %d failed (%s)\n",
|
|
rem, strerror(errno));
|
|
exit(1);
|
|
}
|
|
return;
|
|
}
|
|
if (result == -1 && error == ENOURG)
|
|
{
|
|
#if DEBUG
|
|
fprintf(stderr, "\n\rENOURG\n\r");
|
|
#endif
|
|
rd_rem_urg= 0;
|
|
tcpopt.nwto_flags= NWTO_RCV_NOTURG;
|
|
result= ioctl(rem, NWIOSTCPOPT, &tcpopt);
|
|
if (result == -1)
|
|
{
|
|
fprintf(stderr,
|
|
"rlogin: NWIOSTCPOPT on %d failed (%s)\n",
|
|
rem, strerror(errno));
|
|
exit(1);
|
|
}
|
|
if (urg_1_size != 0)
|
|
{
|
|
urg_byte= urg_1[urg_1_size-1];
|
|
urg_1_size--;
|
|
do_urg(urg_byte);
|
|
if (urg_1_size == 0)
|
|
return;
|
|
if (extra_1_new_size + urg_1_size > MAX_EXTRA_1_NEW_SIZE)
|
|
{
|
|
extra_1_new_size= 0;
|
|
free(extra_1_new);
|
|
extra_1_new= NULL;
|
|
}
|
|
if (extra_1_new_size != 0)
|
|
{
|
|
new_buf= realloc(extra_1_new,
|
|
extra_1_new_size+urg_1_size);
|
|
if (new_buf == 0)
|
|
{
|
|
extra_1_new_size= 0;
|
|
free(extra_1_new);
|
|
extra_1_new= NULL;
|
|
}
|
|
else
|
|
{
|
|
extra_1_new= new_buf;
|
|
memcpy(extra_1_new+extra_1_new_size,
|
|
urg_1, urg_1_size);
|
|
extra_1_new_size += urg_1_size;
|
|
urg_1_size= 0;
|
|
free(urg_1);
|
|
urg_1= NULL;
|
|
}
|
|
}
|
|
if (extra_1_new_size == 0)
|
|
{
|
|
extra_1_new_size= urg_1_size;
|
|
extra_1_new= urg_1;
|
|
urg_1_size= 0;
|
|
urg_1= NULL;
|
|
}
|
|
more2read_rem= 0;
|
|
more2write_1= 1;
|
|
}
|
|
return;
|
|
}
|
|
if (result == -1 && error == EINTR)
|
|
{
|
|
/* Never mind. */
|
|
return;
|
|
}
|
|
if (result == 0)
|
|
{
|
|
msg("connection closed.");
|
|
done(0);
|
|
}
|
|
if (result < 0) {
|
|
fprintf(stderr, "rlogin: %s\n", strerror(error));
|
|
}
|
|
done(1);
|
|
}
|
|
|
|
static void
|
|
completed_wr_rem(result, error)
|
|
int result;
|
|
int error;
|
|
{
|
|
inprogress_wr_rem= 0;
|
|
|
|
if (result > 0)
|
|
{
|
|
if (extra_wr_rem != NULL)
|
|
{
|
|
assert (result <= extra_wr_rem_size);
|
|
extra_wr_rem_size -= result;
|
|
extra_wr_rem_offset += result;
|
|
if (extra_wr_rem_size == 0)
|
|
{
|
|
free(extra_wr_rem);
|
|
extra_wr_rem= NULL;
|
|
if (wr_rem_size == 0)
|
|
{
|
|
more2write_rem= 0;
|
|
more2read_0= 1;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
assert (result <= wr_rem_size);
|
|
wr_rem_size -= result;
|
|
wr_rem_offset += result;
|
|
if (wr_rem_size == 0)
|
|
{
|
|
more2write_rem= 0;
|
|
more2read_0= 1;
|
|
}
|
|
return;
|
|
}
|
|
if (result < 0) {
|
|
fprintf(stderr, "rlogin: %s\n", strerror(error));
|
|
}
|
|
done(1);
|
|
}
|
|
|
|
static void
|
|
do_urg(urg_byte)
|
|
int urg_byte;
|
|
{
|
|
#if DEBUG
|
|
fprintf(stderr, "rlogin: warning got urg_byte 0x%x\r\n", urg_byte);
|
|
#endif
|
|
if (urg_byte & TIOCPKT_WINDOW)
|
|
{
|
|
if (dosigwinch == 0)
|
|
{
|
|
sendwindow();
|
|
signal(SIGWINCH, sigwinch);
|
|
}
|
|
dosigwinch= 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
echo(c)
|
|
int c;
|
|
{
|
|
u_char c1;
|
|
char *new_buf;
|
|
|
|
new_buf= realloc(extra_1_new, extra_1_new_size+6);
|
|
if (new_buf == NULL)
|
|
return;
|
|
extra_1_new= new_buf;
|
|
new_buf= extra_1_new+extra_1_new_size;
|
|
|
|
c1= escapechar;
|
|
if (c1 < ' ')
|
|
{
|
|
*new_buf++= '^';
|
|
*new_buf++= c1 + '@';
|
|
}
|
|
else if (c1 == 0x7f)
|
|
{
|
|
*new_buf++= '^';
|
|
*new_buf++= '?';
|
|
}
|
|
else
|
|
*new_buf++= c1;
|
|
|
|
if (c < ' ')
|
|
{
|
|
*new_buf++= '^';
|
|
*new_buf++= c + '@';
|
|
}
|
|
else if (c == 0x7f)
|
|
{
|
|
*new_buf++= '^';
|
|
*new_buf++= '?';
|
|
}
|
|
else
|
|
*new_buf++= c;
|
|
|
|
*new_buf++= '\r';
|
|
*new_buf++= '\n';
|
|
extra_1_new_size= new_buf-extra_1_new;
|
|
more2write_1= 1;
|
|
}
|
|
|
|
static void
|
|
finish()
|
|
{
|
|
done(0);
|
|
}
|
|
|
|
static char cmdbuf[256];
|
|
|
|
static void
|
|
subshell()
|
|
{
|
|
/* Start a subshell. Based on the first character of the command,
|
|
* the tcp connection will be present at fd 3 ('+'), or at
|
|
* fd 0 and fd 1 ('=')
|
|
*/
|
|
int r, pid, stat, len;
|
|
char *shell, *cmd;
|
|
|
|
/* cancel the reads and writes that are in progress. */
|
|
if (inprogress_0)
|
|
{
|
|
r= fcancel(0, ASIO_READ);
|
|
if (r != 0) abort();
|
|
}
|
|
if (inprogress_1)
|
|
{
|
|
r= fcancel(1, ASIO_WRITE);
|
|
if (r != 0) abort();
|
|
}
|
|
if (inprogress_rd_rem)
|
|
{
|
|
r= fcancel(rem, ASIO_READ);
|
|
if (r != 0) abort();
|
|
}
|
|
if (inprogress_wr_rem)
|
|
{
|
|
r= fcancel(rem, ASIO_WRITE);
|
|
if (r != 0) abort();
|
|
}
|
|
|
|
mode(0);
|
|
|
|
pid= fork();
|
|
if (pid == -1) abort();
|
|
if (pid != 0)
|
|
{
|
|
r= waitpid(pid, &stat, 0);
|
|
if (r != pid) abort();
|
|
|
|
#if DEBUG
|
|
fprintf(stderr, "stat: 0x%x\n", stat);
|
|
#endif
|
|
mode(1);
|
|
return;
|
|
}
|
|
|
|
(void)signal(SIGINT, SIG_DFL);
|
|
|
|
shell= getenv("SHELL");
|
|
if (shell == NULL)
|
|
shell= "/bin/sh";
|
|
printf("~!\ncommand [%s]: ", shell);
|
|
cmd= fgets(cmdbuf, sizeof(cmdbuf), stdin);
|
|
if (cmd == NULL)
|
|
exit(0);
|
|
#if DEBUG
|
|
printf("got command '%s'\n", cmd);
|
|
#endif
|
|
|
|
/* Strip the trailing newline */
|
|
len= strlen(cmd);
|
|
if (len > 0 && cmd[len-1] == '\n')
|
|
cmd[len-1]= '\0';
|
|
else
|
|
printf("\n");
|
|
|
|
/* Skip leading white space */
|
|
while (*cmd != '\0' && isspace(*cmd))
|
|
cmd++;
|
|
|
|
if (*cmd == '+')
|
|
{
|
|
if (rem != 3)
|
|
{
|
|
dup2(rem, 3);
|
|
close(rem);
|
|
}
|
|
cmd++;
|
|
}
|
|
else if (*cmd == '=')
|
|
{
|
|
dup2(rem, 0);
|
|
dup2(rem, 1);
|
|
close(rem);
|
|
cmd++;
|
|
}
|
|
else
|
|
close(rem);
|
|
if (*cmd == '\0')
|
|
{
|
|
r= execl(shell, shell, NULL);
|
|
}
|
|
else
|
|
{
|
|
r= execl("/bin/sh", "sh", "-c", cmd, NULL);
|
|
}
|
|
printf("exec failed: %d, %d\n", r, errno);
|
|
exit(0);
|
|
}
|
|
#endif /* __minix_vmd */
|