sub exec_cmd {
my ($fds, $argc, @argv) = @_;
- my @m = (*STDIN{IO}, '<&=', *STDOUT{IO}, '>&=', *STDERR{IO}, '>&=');
+ my @old = (*STDIN{IO}, *STDOUT{IO}, *STDERR{IO});
my @rdr;
for my $fd (@$fds) {
- my ($old_io, $mode) = splice(@m, 0, 2);
- open(my $tmpfh, $mode, $fd) or die "open $mode$fd: $!";
- push @rdr, $old_io, $mode, $tmpfh;
+ open(my $tmpfh, '+<&=', $fd) or die "open +<&=$fd: $!";
+ push @rdr, shift(@old), $tmpfh;
}
require POSIX; # WNOHANG
$SIG{CHLD} = \&sigchld;
my $pid = fork // die "fork: $!";
if ($pid == 0) {
my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
- while (my ($old_io, $mode, $tmpfh) = splice(@rdr, 0, 3)) {
- open $old_io, $mode, $tmpfh or die "open $mode: $!";
+ while (my ($old_io, $tmpfh) = splice(@rdr, 0, 2)) {
+ open $old_io, '+<&', $tmpfh or die "open +<&=: $!";
}
%ENV = (%ENV, %env);
exec(@argv);