system doesn't return true/false. Please refer to the documentation. For example, if the command was launched successfully and the exit code of the child process is 0, system returns 0. 

my $rv = system(...);
if ($rv == -1) {
   die("Unable to launch child: $!\n");
}

if ($rv & 127) {
   die(sprintf("Error executing child: Child died with signal %d, %s c
+oredump\n",
      ($rv & 127),
      ($rv & 128) ? 'with' : 'without',
   ));
}

if ($rv >> 8) {
   die(sprintf("Error executing child: Child exited with value %d\n",
      ($rv >> 8)
   ));
}

print("Child ran successfully\n");

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In reply to Re: Boolean (was Boolian) operators defy my understanding... by ikegami
in thread Boolean (was Boolian) operators defy my understanding... by cgmd

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