| 1 |
578 |
markom |
#!../expect --
|
| 2 |
|
|
# allow another user to share a shell (or other program) with you
|
| 3 |
|
|
# See kibitz(1) man page for complete info.
|
| 4 |
|
|
# Author: Don Libes, NIST
|
| 5 |
|
|
# Date written: December 5, 1991
|
| 6 |
|
|
# Date last editted: October 19, 1994
|
| 7 |
|
|
# Version: 2.11
|
| 8 |
|
|
exp_version -exit 5.0
|
| 9 |
|
|
|
| 10 |
|
|
# if environment variable "EXPECT_PROMPT" exists, it is taken as a regular
|
| 11 |
|
|
# expression which matches the end of your login prompt (but does not other-
|
| 12 |
|
|
# wise occur while logging in).
|
| 13 |
|
|
|
| 14 |
|
|
set prompt "(%|#|\\$) $" ;# default prompt
|
| 15 |
|
|
set noproc 0
|
| 16 |
|
|
set tty "" ;# default if no -tty flag
|
| 17 |
|
|
set allow_escape 1 ;# allow escapes if true
|
| 18 |
|
|
set escape_char \035 ;# control-right-bracket
|
| 19 |
|
|
set escape_printable "^\]"
|
| 20 |
|
|
set verbose 1 ;# if true, describe what kibitz is doing
|
| 21 |
|
|
|
| 22 |
|
|
set kibitz "kibitz" ;# where kibitz lives if some unusual place.
|
| 23 |
|
|
;# this must end in "kibitz", but can have
|
| 24 |
|
|
;# things in front (like directory names).
|
| 25 |
|
|
#set proxy "kibitz" ;# uncomment and set if you want kibitz to use
|
| 26 |
|
|
;# some other account on remote systems
|
| 27 |
|
|
|
| 28 |
|
|
# The following code attempts to intuit whether cat buffers by default.
|
| 29 |
|
|
# The -u flag is required on HPUX (8 and 9) and IBM AIX (3.2) systems.
|
| 30 |
|
|
if [file exists $exp_exec_library/cat-buffers] {
|
| 31 |
|
|
set catflags "-u"
|
| 32 |
|
|
} else {
|
| 33 |
|
|
set catflags ""
|
| 34 |
|
|
}
|
| 35 |
|
|
# If this fails, you can also force it by commenting in one of the following.
|
| 36 |
|
|
# Or, you can use the -catu flag to the script.
|
| 37 |
|
|
#set catflags ""
|
| 38 |
|
|
#set catflags "-u"
|
| 39 |
|
|
|
| 40 |
|
|
# Some flags must be passed onto the remote kibitz process. They are stored
|
| 41 |
|
|
# in "kibitz_flags". Currently, they include -tty and -silent.
|
| 42 |
|
|
set kibitz_flags ""
|
| 43 |
|
|
|
| 44 |
|
|
while {[llength $argv]>0} {
|
| 45 |
|
|
set flag [lindex $argv 0]
|
| 46 |
|
|
switch -- $flag \
|
| 47 |
|
|
"-noproc" {
|
| 48 |
|
|
set noproc 1
|
| 49 |
|
|
set argv [lrange $argv 1 end]
|
| 50 |
|
|
} "-catu" {
|
| 51 |
|
|
set catflags "-u"
|
| 52 |
|
|
set argv [lrange $argv 1 end]
|
| 53 |
|
|
} "-tty" {
|
| 54 |
|
|
set tty [lindex $argv 1]
|
| 55 |
|
|
set argv [lrange $argv 2 end]
|
| 56 |
|
|
set kibitz_flags "$kibitz_flags -tty $tty"
|
| 57 |
|
|
} "-noescape" {
|
| 58 |
|
|
set allow_escape 0
|
| 59 |
|
|
set argv [lrange $argv 1 end]
|
| 60 |
|
|
} "-escape" {
|
| 61 |
|
|
set escape_char [lindex $argv 1]
|
| 62 |
|
|
set escape_printable $escape_char
|
| 63 |
|
|
set argv [lrange $argv 2 end]
|
| 64 |
|
|
} "-silent" {
|
| 65 |
|
|
set verbose 0
|
| 66 |
|
|
set argv [lrange $argv 1 end]
|
| 67 |
|
|
set kibitz_flags "$kibitz_flags -silent"
|
| 68 |
|
|
} "-proxy" {
|
| 69 |
|
|
set proxy [lindex $argv 1]
|
| 70 |
|
|
set argv [lrange $argv 2 end]
|
| 71 |
|
|
} default {
|
| 72 |
|
|
break
|
| 73 |
|
|
}
|
| 74 |
|
|
}
|
| 75 |
|
|
|
| 76 |
|
|
if {([llength $argv]<1) && ($noproc==0)} {
|
| 77 |
|
|
send_user "usage: kibitz \[args] user \[program ...]\n"
|
| 78 |
|
|
send_user " or: kibitz \[args] user@host \[program ...]\n"
|
| 79 |
|
|
exit
|
| 80 |
|
|
}
|
| 81 |
|
|
|
| 82 |
|
|
log_user 0
|
| 83 |
|
|
set timeout -1
|
| 84 |
|
|
|
| 85 |
|
|
set user [lindex $argv 0]
|
| 86 |
|
|
if [string match -r $user] {
|
| 87 |
|
|
send_user "KRUN" ;# this tells user_number 1 that we're running
|
| 88 |
|
|
;# and to prepare for possible error messages
|
| 89 |
|
|
set user_number 3
|
| 90 |
|
|
# need to check that it exists first!
|
| 91 |
|
|
set user [lindex $argv 1]
|
| 92 |
|
|
} else {
|
| 93 |
|
|
set user_number [expr 1+(0==[string first - $user])]
|
| 94 |
|
|
}
|
| 95 |
|
|
|
| 96 |
|
|
# at this point, user_number and user are correctly determined
|
| 97 |
|
|
# User who originated kibitz session has user_number == 1 on local machine.
|
| 98 |
|
|
# User who is responding to kibitz has user_number == 2.
|
| 99 |
|
|
# User who originated kibitz session has user_number == 3 on remote machine.
|
| 100 |
|
|
|
| 101 |
|
|
# user 1 invokes kibitz as "kibitz user[@host]"
|
| 102 |
|
|
# user 2 invokes kibitz as "kibitz -####" (some pid).
|
| 103 |
|
|
# user 3 invokes kibitz as "kibitz -r user".
|
| 104 |
|
|
|
| 105 |
|
|
# uncomment for debugging: leaves each user's session in a file: 1, 2 or 3
|
| 106 |
|
|
#exec rm -f $user_number
|
| 107 |
|
|
#exp_internal -f $user_number 0
|
| 108 |
|
|
|
| 109 |
|
|
set user2_islocal 1 ;# assume local at first
|
| 110 |
|
|
|
| 111 |
|
|
# later move inside following if $user_number == 1
|
| 112 |
|
|
# return true if x is a prefix of xjunk, given that prefixes are only
|
| 113 |
|
|
# valid at . delimiters
|
| 114 |
|
|
# if !do_if0, skip the whole thing - this is here just to make caller simpler
|
| 115 |
|
|
proc is_prefix {do_if0 x xjunk} {
|
| 116 |
|
|
if 0!=$do_if0 {return 0}
|
| 117 |
|
|
set split [split $xjunk .]
|
| 118 |
|
|
for {set i [expr [llength $split]-1]} {$i>=0} {incr i -1} {
|
| 119 |
|
|
if [string match $x [join [lrange $split 0 $i] .]] {return 1}
|
| 120 |
|
|
}
|
| 121 |
|
|
return 0
|
| 122 |
|
|
}
|
| 123 |
|
|
|
| 124 |
|
|
# get domainname. Unfortunately, on some systems, domainname(1)
|
| 125 |
|
|
# returns NIS domainname which is not the internet domainname.
|
| 126 |
|
|
proc domainname {} {
|
| 127 |
|
|
# open pops stack upon failure
|
| 128 |
|
|
set rc [catch {open /etc/resolv.conf r} file]
|
| 129 |
|
|
if {$rc==0} {
|
| 130 |
|
|
while {-1!=[gets $file buf]} {
|
| 131 |
|
|
if 1==[scan $buf "domain %s" name] {
|
| 132 |
|
|
close $file
|
| 133 |
|
|
return $name
|
| 134 |
|
|
}
|
| 135 |
|
|
}
|
| 136 |
|
|
close $file
|
| 137 |
|
|
}
|
| 138 |
|
|
|
| 139 |
|
|
# fall back to using domainname
|
| 140 |
|
|
if {0==[catch {exec domainname} name]} {return $name}
|
| 141 |
|
|
|
| 142 |
|
|
error "could not figure out domainname"
|
| 143 |
|
|
}
|
| 144 |
|
|
|
| 145 |
|
|
if $user_number==1 {
|
| 146 |
|
|
if $noproc==0 {
|
| 147 |
|
|
if [llength $argv]>1 {
|
| 148 |
|
|
set pid [eval spawn [lrange $argv 1 end]]
|
| 149 |
|
|
} else {
|
| 150 |
|
|
# if running as CGI, shell may not be set!
|
| 151 |
|
|
set shell /bin/sh
|
| 152 |
|
|
catch {set shell $env(SHELL)}
|
| 153 |
|
|
set pid [spawn $shell]
|
| 154 |
|
|
}
|
| 155 |
|
|
set shell $spawn_id
|
| 156 |
|
|
}
|
| 157 |
|
|
|
| 158 |
|
|
# is user2 remote?
|
| 159 |
|
|
regexp (\[^@\]*)@*(.*) $user ignore tmp host
|
| 160 |
|
|
set user $tmp
|
| 161 |
|
|
if ![string match $host ""] {
|
| 162 |
|
|
set h_rc [catch {exec hostname} hostname]
|
| 163 |
|
|
set d_rc [catch domainname domainname]
|
| 164 |
|
|
|
| 165 |
|
|
if {![is_prefix $h_rc $host $hostname]
|
| 166 |
|
|
&& ![is_prefix $d_rc $host $hostname.$domainname]} {
|
| 167 |
|
|
set user2_islocal 0
|
| 168 |
|
|
}
|
| 169 |
|
|
}
|
| 170 |
|
|
|
| 171 |
|
|
if !$user2_islocal {
|
| 172 |
|
|
if $verbose {send_user "connecting to $host\n"}
|
| 173 |
|
|
|
| 174 |
|
|
if ![info exists proxy] {
|
| 175 |
|
|
proc whoami {} {
|
| 176 |
|
|
global env
|
| 177 |
|
|
if [info exists env(USER)] {return $env(USER)}
|
| 178 |
|
|
if [info exists env(LOGNAME)] {return $env(LOGNAME)}
|
| 179 |
|
|
if ![catch {exec whoami} user] {return $user}
|
| 180 |
|
|
if ![catch {exec logname} user] {return $user}
|
| 181 |
|
|
# error "can't figure out who you are!"
|
| 182 |
|
|
}
|
| 183 |
|
|
set proxy [whoami]
|
| 184 |
|
|
}
|
| 185 |
|
|
spawn rlogin $host -l $proxy -8
|
| 186 |
|
|
set userin $spawn_id
|
| 187 |
|
|
set userout $spawn_id
|
| 188 |
|
|
|
| 189 |
|
|
catch {set prompt $env(EXPECT_PROMPT)}
|
| 190 |
|
|
|
| 191 |
|
|
set timeout 120
|
| 192 |
|
|
expect {
|
| 193 |
|
|
assword: {
|
| 194 |
|
|
stty -echo
|
| 195 |
|
|
send_user "password (for $proxy) on $host: "
|
| 196 |
|
|
set old_timeout $timeout; set timeout -1
|
| 197 |
|
|
expect_user -re "(.*)\n"
|
| 198 |
|
|
send_user "\n"
|
| 199 |
|
|
set timeout $old_timeout
|
| 200 |
|
|
send "$expect_out(1,string)\r"
|
| 201 |
|
|
# bother resetting echo?
|
| 202 |
|
|
exp_continue
|
| 203 |
|
|
} incorrect* {
|
| 204 |
|
|
send_user "invalid password or account\n"
|
| 205 |
|
|
exit
|
| 206 |
|
|
} "TERM = *) " {
|
| 207 |
|
|
send "\r"
|
| 208 |
|
|
exp_continue
|
| 209 |
|
|
} timeout {
|
| 210 |
|
|
send_user "connection to $host timed out\n"
|
| 211 |
|
|
exit
|
| 212 |
|
|
} eof {
|
| 213 |
|
|
send_user "connection to host failed: $expect_out(buffer)"
|
| 214 |
|
|
exit
|
| 215 |
|
|
} -re $prompt
|
| 216 |
|
|
}
|
| 217 |
|
|
if $verbose {send_user "starting kibitz on $host\n"}
|
| 218 |
|
|
# the kill protects user1 from receiving user3's
|
| 219 |
|
|
# prompt if user2 exits via expect's exit.
|
| 220 |
|
|
send "$kibitz $kibitz_flags -r $user;kill -9 $$\r"
|
| 221 |
|
|
|
| 222 |
|
|
expect {
|
| 223 |
|
|
-re "kibitz $kibitz_flags -r $user.*KRUN" {}
|
| 224 |
|
|
-re "kibitz $kibitz_flags -r $user.*(kibitz\[^\r\]*)\r" {
|
| 225 |
|
|
send_user "unable to start kibitz on $host: \"$expect_out(1,string)\"\n"
|
| 226 |
|
|
send_user "try rlogin by hand followed by \"kibitz $user\"\n"
|
| 227 |
|
|
exit
|
| 228 |
|
|
}
|
| 229 |
|
|
timeout {
|
| 230 |
|
|
send_user "unable to start kibitz on $host: "
|
| 231 |
|
|
set expect_out(buffer) "timed out"
|
| 232 |
|
|
set timeout 0; expect -re .+
|
| 233 |
|
|
send_user $expect_out(buffer)
|
| 234 |
|
|
exit
|
| 235 |
|
|
}
|
| 236 |
|
|
}
|
| 237 |
|
|
expect {
|
| 238 |
|
|
-re ".*\n" {
|
| 239 |
|
|
# pass back diagnostics
|
| 240 |
|
|
# should really strip out extra cr
|
| 241 |
|
|
send_user $expect_out(buffer)
|
| 242 |
|
|
exp_continue
|
| 243 |
|
|
}
|
| 244 |
|
|
KABORT exit
|
| 245 |
|
|
default exit
|
| 246 |
|
|
KDATA
|
| 247 |
|
|
}
|
| 248 |
|
|
}
|
| 249 |
|
|
}
|
| 250 |
|
|
|
| 251 |
|
|
if $user_number==2 {
|
| 252 |
|
|
set pid [string trimleft $user -]
|
| 253 |
|
|
}
|
| 254 |
|
|
|
| 255 |
|
|
set local_io [expr ($user_number==3)||$user2_islocal]
|
| 256 |
|
|
if $local_io||($user_number==2) {
|
| 257 |
|
|
if 0==[info exists pid] {set pid [pid]}
|
| 258 |
|
|
|
| 259 |
|
|
set userinfile /tmp/exp0.$pid
|
| 260 |
|
|
set useroutfile /tmp/exp1.$pid
|
| 261 |
|
|
}
|
| 262 |
|
|
|
| 263 |
|
|
proc prompt1 {} {
|
| 264 |
|
|
return "kibitz[info level].[history nextid]> "
|
| 265 |
|
|
}
|
| 266 |
|
|
|
| 267 |
|
|
set esc_match {}
|
| 268 |
|
|
if {$allow_escape} {
|
| 269 |
|
|
set esc_match {
|
| 270 |
|
|
$escape_char {
|
| 271 |
|
|
send_user "\nto exit kibitz, enter: exit\n"
|
| 272 |
|
|
send_user "to suspend kibitz, press appropriate job control sequence\n"
|
| 273 |
|
|
send_user "to return to kibitzing, enter: return\n"
|
| 274 |
|
|
interpreter
|
| 275 |
|
|
send_user "returning to kibitz\n"
|
| 276 |
|
|
}
|
| 277 |
|
|
}
|
| 278 |
|
|
}
|
| 279 |
|
|
|
| 280 |
|
|
proc prompt1 {} {
|
| 281 |
|
|
return "kibitz[info level].[history nextid]> "
|
| 282 |
|
|
}
|
| 283 |
|
|
|
| 284 |
|
|
set timeout -1
|
| 285 |
|
|
|
| 286 |
|
|
# kibitzer executes following code
|
| 287 |
|
|
if $user_number==2 {
|
| 288 |
|
|
# for readability, swap variables
|
| 289 |
|
|
set tmp $userinfile
|
| 290 |
|
|
set userinfile $useroutfile
|
| 291 |
|
|
set useroutfile $tmp
|
| 292 |
|
|
|
| 293 |
|
|
if ![file readable $userinfile] {
|
| 294 |
|
|
send_user "Eh? No one is asking you to kibitz.\n"
|
| 295 |
|
|
exit -1
|
| 296 |
|
|
}
|
| 297 |
|
|
spawn -open [open "|cat $catflags < $userinfile" "r"]
|
| 298 |
|
|
set userin $spawn_id
|
| 299 |
|
|
|
| 300 |
|
|
spawn -open [open $useroutfile w]
|
| 301 |
|
|
set userout $spawn_id
|
| 302 |
|
|
# open will hang until other user's cat starts
|
| 303 |
|
|
|
| 304 |
|
|
stty -echo raw
|
| 305 |
|
|
if $allow_escape {send_user "Escape sequence is $escape_printable\r\n"}
|
| 306 |
|
|
|
| 307 |
|
|
# While user is reading message, try to delete other fifo
|
| 308 |
|
|
catch {exec rm -f $userinfile}
|
| 309 |
|
|
|
| 310 |
|
|
eval interact $esc_match \
|
| 311 |
|
|
-output $userout \
|
| 312 |
|
|
-input $userin
|
| 313 |
|
|
|
| 314 |
|
|
exit
|
| 315 |
|
|
}
|
| 316 |
|
|
|
| 317 |
|
|
# only user_numbers 1 and 3 execute remaining code
|
| 318 |
|
|
|
| 319 |
|
|
proc abort {} {
|
| 320 |
|
|
global user_number
|
| 321 |
|
|
|
| 322 |
|
|
# KABORT tells user_number 1 that user_number 3 has run into problems
|
| 323 |
|
|
# and is exiting, and diagnostics have been returned already
|
| 324 |
|
|
if $user_number==3 {send_user KABORT}
|
| 325 |
|
|
exit
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
if $local_io {
|
| 329 |
|
|
proc mkfifo {f} {
|
| 330 |
|
|
if 0==[catch {exec mkfifo $f}] return ;# POSIX
|
| 331 |
|
|
if 0==[catch {exec mknod $f p}] return
|
| 332 |
|
|
# some systems put mknod in wierd places
|
| 333 |
|
|
if 0==[catch {exec /usr/etc/mknod $f p}] return ;# Sun
|
| 334 |
|
|
if 0==[catch {exec /etc/mknod $f p}] return ;# AIX, Cray
|
| 335 |
|
|
puts "Couldn't figure out how to make a fifo - where is mknod?"
|
| 336 |
|
|
abort
|
| 337 |
|
|
}
|
| 338 |
|
|
|
| 339 |
|
|
proc rmfifos {} {
|
| 340 |
|
|
global userinfile useroutfile
|
| 341 |
|
|
catch {exec rm -f $userinfile $useroutfile}
|
| 342 |
|
|
}
|
| 343 |
|
|
|
| 344 |
|
|
trap {rmfifos; exit} {SIGINT SIGQUIT SIGTERM}
|
| 345 |
|
|
|
| 346 |
|
|
# create 2 fifos to communicate with other user
|
| 347 |
|
|
mkfifo $userinfile
|
| 348 |
|
|
mkfifo $useroutfile
|
| 349 |
|
|
# make sure other user can access despite umask
|
| 350 |
|
|
exec chmod 666 $userinfile $useroutfile
|
| 351 |
|
|
|
| 352 |
|
|
if $verbose {send_user "asking $user to type: kibitz -$pid\n"}
|
| 353 |
|
|
|
| 354 |
|
|
# can't use exec since write insists on being run from a tty!
|
| 355 |
|
|
set rc [catch {
|
| 356 |
|
|
system echo "Can we talk? Run: \"kibitz -$pid\"" | \
|
| 357 |
|
|
/bin/write $user $tty
|
| 358 |
|
|
}
|
| 359 |
|
|
]
|
| 360 |
|
|
if $rc {rmfifos;abort}
|
| 361 |
|
|
|
| 362 |
|
|
spawn -open [open $useroutfile w]
|
| 363 |
|
|
set userout $spawn_id
|
| 364 |
|
|
# open will hang until other user's cat starts
|
| 365 |
|
|
|
| 366 |
|
|
spawn -open [open "|cat $catflags < $userinfile" "r"]
|
| 367 |
|
|
set userin $spawn_id
|
| 368 |
|
|
catch {exec rm $userinfile}
|
| 369 |
|
|
}
|
| 370 |
|
|
|
| 371 |
|
|
stty -echo raw
|
| 372 |
|
|
|
| 373 |
|
|
if $user_number==3 {
|
| 374 |
|
|
send_user "KDATA" ;# this tells user_number 1 to send data
|
| 375 |
|
|
|
| 376 |
|
|
interact {
|
| 377 |
|
|
-output $userout
|
| 378 |
|
|
-input $userin eof {
|
| 379 |
|
|
wait -i $userin
|
| 380 |
|
|
return -tcl
|
| 381 |
|
|
} -output $user_spawn_id
|
| 382 |
|
|
}
|
| 383 |
|
|
} else {
|
| 384 |
|
|
if $allow_escape {send_user "Escape sequence is $escape_printable\r\n"}
|
| 385 |
|
|
|
| 386 |
|
|
if $noproc {
|
| 387 |
|
|
interact {
|
| 388 |
|
|
-output $userout
|
| 389 |
|
|
-input $userin eof {wait -i $userin; return}
|
| 390 |
|
|
-output $user_spawn_id
|
| 391 |
|
|
}
|
| 392 |
|
|
} else {
|
| 393 |
|
|
eval interact $esc_match {
|
| 394 |
|
|
-output $shell \
|
| 395 |
|
|
-input $userin eof {
|
| 396 |
|
|
wait -i $userin
|
| 397 |
|
|
close -i $shell
|
| 398 |
|
|
return
|
| 399 |
|
|
} -output $shell \
|
| 400 |
|
|
-input $shell -output "$user_spawn_id $userout"
|
| 401 |
|
|
}
|
| 402 |
|
|
wait -i $shell
|
| 403 |
|
|
}
|
| 404 |
|
|
}
|
| 405 |
|
|
|
| 406 |
|
|
if $local_io rmfifos
|
