如何使用 Tcl 从 proc 生成 telnet?
how to spawn telnet from a proc with Tcl?
telnet 输出在哪里?
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ tclsh main.tcl
spawn telnet rainmaker.wunderground.com
getting weather for nyc
^C
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
主要内容:
lappend auto_path /home/thufir/NetBeansProjects/spawnTelnet/telnet/api
package require weather 1.0
tutstack::connect "nyc"
代码:
package provide weather 1.0
package require Tcl 8.5
package require Expect
namespace eval ::tutstack {
}
proc ::tutstack::parse {city} {
puts "getting weather for $city"
expect -nocase "Press Return to continue:"
#interact [=12=]4 return
interact [=12=]4 return
}
proc ::tutstack::connect {city} {
spawn telnet rainmaker.wunderground.com
set telnet $spawn_id
#interact
parse $city
}
这个有效:
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ tclsh chainedProcs.tcl
hello Alice from first
hello Alice from second
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ cat chainedProcs.tcl
lappend auto_path /home/thufir/NetBeansProjects/spawnTelnet/telnet/chained
package require chained 1.0
example::first "Alice"
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ cat chained/chained.tcl
package provide chained 1.0
namespace eval ::example {
}
proc ::example::first {foo} {
puts "hello $foo from first"
second $foo
}
proc ::example::second {bar} {
puts "hello $bar from second"
}
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
但是...没有在那里使用 telnet。我正在寻找 "chain" (?) 一个序列,但使用 telnet、expect、interact 等
无论何时在过程中使用 Expect 包的命令,都需要注意它访问变量的方式。特别是,您可能至少需要说:
global spawn_id
在每个程序中。大概是这样的:
proc ::tutstack::parse {city} {
global spawn_id
puts "getting weather for $city"
expect -nocase "Press Return to continue:"
# You *might* need inter_return instead of return; the documentation isn't clear
interact "[=11=]4" return
}
proc ::tutstack::connect {city} {
global spawn_id
spawn telnet rainmaker.wunderground.com
set telnet $spawn_id
parse $city
}
但是,您最好将 spawn ID(即调用 spawn
的结果)保存在名称空间变量中,并通过 -i
标志将其显式传递到相关命令中,像这样:
proc ::tutstack::connect {city} {
variable telnet [spawn telnet rainmaker.wunderground.com]
parse $city
}
proc ::tutstack::parse {city} {
variable telnet
puts "getting weather for $city"
expect -i $telnet -nocase "Press Return to continue:"
# You *might* need inter_return instead of return; the documentation isn't clear
interact -i $telnet "[=12=]4" return
}
telnet 输出在哪里?
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ tclsh main.tcl
spawn telnet rainmaker.wunderground.com
getting weather for nyc
^C
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
主要内容:
lappend auto_path /home/thufir/NetBeansProjects/spawnTelnet/telnet/api
package require weather 1.0
tutstack::connect "nyc"
代码:
package provide weather 1.0
package require Tcl 8.5
package require Expect
namespace eval ::tutstack {
}
proc ::tutstack::parse {city} {
puts "getting weather for $city"
expect -nocase "Press Return to continue:"
#interact [=12=]4 return
interact [=12=]4 return
}
proc ::tutstack::connect {city} {
spawn telnet rainmaker.wunderground.com
set telnet $spawn_id
#interact
parse $city
}
这个有效:
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ tclsh chainedProcs.tcl
hello Alice from first
hello Alice from second
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ cat chainedProcs.tcl
lappend auto_path /home/thufir/NetBeansProjects/spawnTelnet/telnet/chained
package require chained 1.0
example::first "Alice"
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$ cat chained/chained.tcl
package provide chained 1.0
namespace eval ::example {
}
proc ::example::first {foo} {
puts "hello $foo from first"
second $foo
}
proc ::example::second {bar} {
puts "hello $bar from second"
}
thufir@dur:~/NetBeansProjects/spawnTelnet/telnet$
但是...没有在那里使用 telnet。我正在寻找 "chain" (?) 一个序列,但使用 telnet、expect、interact 等
无论何时在过程中使用 Expect 包的命令,都需要注意它访问变量的方式。特别是,您可能至少需要说:
global spawn_id
在每个程序中。大概是这样的:
proc ::tutstack::parse {city} {
global spawn_id
puts "getting weather for $city"
expect -nocase "Press Return to continue:"
# You *might* need inter_return instead of return; the documentation isn't clear
interact "[=11=]4" return
}
proc ::tutstack::connect {city} {
global spawn_id
spawn telnet rainmaker.wunderground.com
set telnet $spawn_id
parse $city
}
但是,您最好将 spawn ID(即调用 spawn
的结果)保存在名称空间变量中,并通过 -i
标志将其显式传递到相关命令中,像这样:
proc ::tutstack::connect {city} {
variable telnet [spawn telnet rainmaker.wunderground.com]
parse $city
}
proc ::tutstack::parse {city} {
variable telnet
puts "getting weather for $city"
expect -i $telnet -nocase "Press Return to continue:"
# You *might* need inter_return instead of return; the documentation isn't clear
interact -i $telnet "[=12=]4" return
}