Messages in this thread | | | Date | Sun, 24 Jul 2005 18:40:25 +0200 (MEST) | From | Jan Engelhardt <> | Subject | xor as a lazy comparison |
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Hi list,
I have seen this in kernel/signal.c:check_kill_permission()
&& (current->euid ^ t->suid) && (current->euid ^ t->uid)
If current->euid and t->suid are the same, the xor returns 0, so these statements are effectively the same as a !=
current->euid != t->suid ...
Why ^ ?
Jan Engelhardt -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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