exec.t

UNIX下perl实现代码

#!./perl

$| = 1;				# flush stdout

$ENV{LC_ALL}   = 'C';		# Forge English error messages.
$ENV{LANGUAGE} = 'C';		# Ditto in GNU.

if ($^O eq 'MSWin32') {
    # XXX the system tests could be written to use ./perl and so work on Win32
    print "1..0 # Skip: shh, win32\n";
    exit(0);
}

print "1..8\n";

if ($^O ne 'os2') {
  print "not ok 1\n" if system "echo ok \\1";	# shell interpreted
} 
else {
  print "ok 1 # skipped: bug/feature of pdksh\n"; # shell interpreted
}
print "not ok 2\n" if system "echo ok 2";	# split and directly called
print "not ok 3\n" if system "echo", "ok", "3"; # directly called

# these should probably be rewritten to match the examples in perlfunc.pod
if (system "true") {print "not ok 4\n";} else {print "ok 4\n";}

if ($^O eq 'mpeix') {
    print "ok 5 # skipped: status broken on MPE/iX\n";
} else {
    if ((system "/bin/sh -c 'exit 1'") != 256) { print "not "; }
    print "ok 5\n";
}

$rc = system "lskdfj";
if ($rc == 255 << 8 or $rc == -1 and
     (
      $! == 2 or
      $! =~ /\bno\b.*\bfile/i or
      $! == 13 or
      $! =~ /permission denied/i
     )
   )
 {print "ok 6\n";} else {print "not ok 6\n";}

unless (exec "lskdjfalksdjfdjfkls") {print "ok 7\n";} else {print "not ok 7\n";}

exec "echo","ok","8";