/usr/share/doc/libipc-run-perl/examples/runsu is in libipc-run-perl 0.92-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #!/usr/bin/perl -w
## Demonstration of chatting with a bash shell.
use strict ;
use IPC::Run qw( start pump finish timeout ) ;
$IPC::Run::debug = 10 ;
my ( $in, $out ) ;
die "usage: runsu <user> <password>" unless @ARGV ;
my $user = @ARGV > 1 ? shift : $ENV{USER} || $ENV{USERNAME} ;
my $passwd = shift ;
my $h = start(
[qw(su - ), $user], '<pty<', \$in, '>pty>', \$out,
timeout( 5 ),
) ;
pump $h until $out =~ /^password/im ;
$in = "$passwd\n" ;
## Assume atomic prompt writes
## and that a non-word is the last char in the prompt.
$out = '' ;
pump $h until $out =~ /([^\r\n\w]\s*)(?!\n)$/ ;
my $prompt = $1 ;
print "Detected prompt string = '$prompt'\n" ;
$prompt = quotemeta $prompt ;
for ( qw( ls ps fOoBaR pwd ) ) {
$in = $_ . "\n" ;
$out = '' ;
$h->timeout( 5 ) ; # restart the timout
pump $h until $out =~ s/\A((?s:.*))(?=^.*?$prompt(?!\n)\Z)//m ;
print map { "su: $_\n" } split( /\n/m, $1 ) ;
}
$in = "exit\n" ;
finish $h ;
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