linux - Exit handler in expect script not removing file -

i'm having trouble expect script writing. goal of script ssh partner , obtain network configuration information. information saved in file , copied local host processing. file removed remote host upon exit.

under normal conditions, works great , expect. however, should user press ^c interrupt script during scp process, file not removed remote host. left there. not sure why or how force removal. when stepping through signal handler , exit handler during such case, appears reason exit handler doesn't think file exists , skips if statement. have no idea why, though.

i have copied exit handler , signal handler script below. please let me know if have ideas or see obvious errors. i'm not sure go here.

# configure exit handler exit -onexit {     # remove configuration info file if exists      if {[file exists ptinit.txt]} {         send "rm -rf ptinit.txt\r"         expect -exact "rm -rf ptinit.txt\r"     } }  # configure signal trap remove partner file before exiting proc errsig_handler {pidlst} {     send_user "\nstop command received user. exiting.\n"      {set [expr [llength $pidlst]-1]} {$i >= 0} {incr -1} {         send_user "current pid is: [lindex $pidlst $i]\n"          # if pid not null , process running, kill         if {[lindex $pidlst $i] != "" && [exec kill -0 [lindex $pidlst $i] 2>/dev/null] == ""} {             send_user "pid [lindex $pidlst $i] not null , running.\n"             exec kill -9 [lindex $pidlst $i]         }     } }  trap {errsig_handler $cur_pid} {int tstp} 

update: tried method suggested dinesh, still having issues. updated exit handler code follows: exit -onexit { exp_internal 1 unset expect_out(buffer)

# remove configuration info file remote server  send_user "\nin exit handler\n"  send "rm -rf ptinit.txt\r" expect {     "rm -rf ptinit.txt\r" {         sleep 5         send "exit\r"         expect eof {puts "eof in rm match received."; sleep 2}     }     "cannot remove" {          puts "file deletion not successful - ptinit.txt needs deleted manually."     }     -re $prompt {         sleep 5         send "exit\r"         expect eof {puts "eof received."; sleep 2}     } }  send_user "leaving exit handler\n" 

}

the way work commenting out signal handler loop kills spawned pids. when uncommented, exit handler expect times out.

either way, file still not removed remote system. see exp_internal 1:

stop command received user. exiting.  in exit handler send: sending "rm -rf ptinit.txt\r" { exp9 } gate keeper glob pattern '(%|#|>|\$) $' ''. not usable, disabling performance booster.  expect: " \r\n" (spawn_id exp9) match glob pattern "rm -rf ptinit.txt\r"? no "cannot remove"? no "(%|#|>|\$) $"? (no gate, re only) gate=yes re=no  expect: " \r\nrm -rf ptinit.txt\r\n" (spawn_id exp9) match glob pattern "rm -rf ptinit.txt\r"? yes expect: set expect_out(0,string) "rm -rf ptinit.txt\r" expect: set expect_out(spawn_id) "exp9" expect: set expect_out(buffer) " \r\nrm -rf ptinit.txt\r" send: sending "exit\r" { exp9 } expect: read eof expect: set expect_out(spawn_id) "exp9" expect: set expect_out(buffer) "\n\rptinit.txt                                      0%    0     0.0kb/s   --:-- eta\rptinit.txt                                100%   35     0.0kb/s   00:00    \r\nexit\r\n" eof in rm match received. leaving exit handler tty_set: raw = 5, echo = 0 

update 2:

i updated exit handler following:

exit -onexit {     exp_internal 1     unset expect_out(buffer)      # remove configuration info file remote server      set filename ptinit.txt     send_user "\nin exit handler\n"      send "rm -rf $filename\r"     expect {         "cannot remove" { puts "file deletion not successful" }         -re $prompt { puts "file deleted" }     }     send_user "leaving exit handler\n" } 

this debugging information - still no file deleted.

stop command received user. exiting.  in exit handler send: sending "rm -rf ptinit.txt\r" { exp9 } gate keeper glob pattern '(%|#|>|\$) $' ''. not usable, disabling performance booster.  expect: " \r\n" (spawn_id exp9) match glob pattern "cannot remove"? no "(%|#|>|\$) $"? (no gate, re only) gate=yes re=no  expect: " \r\nrm -rf ptinit.txt\r\n" (spawn_id exp9) match glob pattern "cannot remove"? no "(%|#|>|\$) $"? (no gate, re only) gate=yes re=no  expect: " \r\nrm -rf ptinit.txt\r\n\rptinit.txt                                      0%    0     0.0kb/s   --:-- eta" (spawn_id  exp9) match glob pattern "cannot remove"? no "(%|#|>|\$) $"? (no gate, re only) gate=yes re=no  expect: " \r\nrm -rf ptinit.txt\r\n\rptinit.txt                                      0%    0     0.0kb/s   --:-- eta\rptinit.tx t                                    100%   35     0.0kb/s   00:00    \r\n" (spawn_id exp9) match glob pattern "cannot remove"? no "(%|#|>|\$) $"? (no gate, re only) gate=yes re=no expect: read eof expect: set expect_out(spawn_id) "exp9" expect: set expect_out(buffer) " \r\nrm -rf ptinit.txt\r\n\rptinit.txt                                      0%    0     0.0kb/s   -- :-- eta\rptinit.txt                                    100%   35     0.0kb/s   00:00    \r\n" leaving exit handler tty_set: raw = 5, echo = 0 

the problem because of file exists. checks file path present or not in local machine wherever running expect script, not in remote directory.

removing solve problem.

#this common approach few known prompts #if device's prompt missing here, can add same. set prompt "#|>|\\\$"; # escaped `$` symbol backslash match literal '$'  set filename ptinit.txt send "rm -rf $filename\r" expect {     "cannot remove" { puts "file deletion not successful"}     -re $prompt { puts "file deleted" } } 

update : in code, expecting rm -rf ptinit.txt\r wrong. because expect see sent spawned process (that rm -rf ptinit.txt\r) , match that. due this, never sent spawned process.

so, can enable debug above code given me , share here?