Messages in this thread | | | Date | Fri, 25 Jun 1999 02:59:48 +0200 (MET DST) | From | (Guest section DW) | Subject | Re: [RFC] Subtle race in dup2() and permissions on /proc/<pid>/fd/<n> |
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viro asks:
> dup2(foo, bar) closes bar, but completely ignores the results of > close(). POSIX position on that?
The call fd = dup2(fd1,fd2); is equivalent to close(fd2); fd = fcntl(fd1, F_DUPFD, fd2); except that - if fd1==fd2 and both are valid, then dup2() returns this without closing fd2 - if fd1 is invalid, dup2 returns -1 without closing fd2
So, yes, it looks like there is no provision for returning close() errors here.
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