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doas_askpass (960B) - View raw

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#!/usr/bin/expect --

# askpass implementation for doas
# example usage: DOAS_ASKPASS="mew -P -p password:" doas_askpass echo working

# don't mind the man behind the curtain
log_user 0

# no command, then nothing to do
if { $argc == 0 } { exit 0 }

# treat all arguments as command input
set cmd [lrange $argv 0 end];

# read askpass from env or fallback to dmenu_pass ()
if {[info exists ::env(DOAS_ASKPASS)]} {
  set askpass "$::env(DOAS_ASKPASS)"
} else {
  set askpass "dmenu_pass password:"
}

# read password from user
set pwd [exec {*}$askpass]

# spawn doas operation
spawn doas {*}$cmd

# send password and execute command
expect "doas*password:" {
  send -- "$pwd\r"
  expect \r
  log_user 1
  expect eof
}

# get the exit status of the spawned doas command
set status [wait]

# check exit code (4th element of wait result)
set exit_code [lindex $status 3]

# exit with 1 if doas failed, else 0
if { $exit_code != 0 } {
  exit 1
} else {
  exit 0
}