Linux认证之使用expect实现ssh自动交互

会计考友

Linux认证之使用expect实现ssh自动交互
6 E! L& c* t9 S; k使用expect实现ssh自动交互
下面是使用expect实现的自动远端命令执行的脚本ssh-exec：
#！/bin/sh
# \
exec expect -- “$0” ${1+“$@”}
# ssh-exec host user password command
; X+ v" J4 a, s3 Q4 Z# execute command on remote host
exp_version -exit 5.0
set ERR_PERMISSION_DENIED 1
7 P: R- k) C4 C/ [5 Q8 qset ERR_DIR_OR_FILE_NOT_EXIST 2
2 a# A) K. b# fset ERR_TIMEOUT 3
  P$ p9 z$ s+ l5 T% E# Dset ERR_CONNECTION_REFUSED 4
set ERR_INVALID_ARGUMENT 5
6 }- D$ c4 P. X( xproc auth_trans {password} {
upvar #0 ERR_PERMISSION_DENIED ERR_PERMISSION_DENIED
upvar #0 ERR_DIR_OR_FILE_NOT_EXIST ERR_DIR_OR_FILE_NOT_EXIST
- V3 Z4 T# }! o/ n) {' a$ l* Nsend “$password\r”
expect {
8 N9 D* Z$ @. }& p4 L6 b#password not correct
“Permission denied， please try again.” {
  x! A' P) G+ P- h7 wexit $ERR_PERMISSION_DENIED
}
5 L6 _; y+ N, I$ ~! u# 。..transmission goes after.。.
; b" V1 v; K3 E-re “Is a directory|No such file or directory” {
exit $ERR_DIR_OR_FILE_NOT_EXIST
' B- V$ q. M7 q: Z9 V5 J  F}
5 @  T. Q$ C9 C-re “KB/s|MB/s” {
set timeout -1
expect eof
9 }; d+ {' n/ u/ M* H}
}
}
if {$argc！=2} {
send_user “usage： remote-exec command password\n”
send_user “ command should be quoted.\n”
send_user “ Eg. remote-exec \”ssh ls\\; echo done\“ password\n”
send_user “ or： remote-exec \”scp /local-file ：/remote-file\“ password\n”
( k% [7 w) K4 a& |% o2 E% wexit $ERR_INVALID_ARGUMENT
}
0 z3 i5 }! a" A7 s  `% X5 a, G
set cmd ［lindex $argv 0］
set password ［lindex $argv 1］
2 D% j: @# r+ B. \$ j5 u6 q1 }0 z* meval spawn $cmd
#timeout in sec， default 10
set timeout 30
expect {
  ?: P0 d( [* u' R#first connect， no public key in ~/.ssh/known_hosts
“Are you sure you want to continue connecting （yes/no）？” {
send “yes\r”
; L- a; P$ _" S4 D( L9 `. F" c  lexpect “password：”
6 q9 R- p1 J- s+ {9 b/ B* hauth_trans $password
}
#already has public key in ~/.ssh/known_hosts
“password：” {
2 m0 `0 i' `9 |: zauth_trans $password
}
#user equivalence already established， no password is necessary
0 j3 C: P# V, T# H- y7 r, P% j$ c# w-re “kB/s|MB/s” {
5 @2 o4 {- s9 Rset timeout -1
expect eof
4 t" i' i7 E' |, W: g, V2 Q}
-re “Is a directory|No such file or directory” {
expect eof
exit $ERR_DIR_OR_FILE_NOT_EXIST
" R5 ~; i; s2 N1 V! s& r2 y% @6 k( R}
0 N9 o) k( T$ Y“Connection refused” {
. R+ i1 W' G7 I  K2 L! Jexpect eof
exit $ERR_CONNECTION_REFUSED
) i* n5 f$ B" A! w3 `}
& s- O* H1 f6 G#connetion error
timeout {
exit $ERR_TIMEOUT
}
9 t3 ]% {/ I" a}