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WebSVN – planix.SVN – Blame – /os/branches/feature_fixcpp/sys/src/ape/lib/ap/plan9/dup.c – Rev 2

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#include "lib.h"
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#include <unistd.h>
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#include <errno.h>
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int
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dup(int oldd)
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{
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	return fcntl(oldd, F_DUPFD, 0);
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}
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int
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dup2(int oldd, int newd)
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{
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	if(newd < 0 || newd >= OPEN_MAX){
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		errno = EBADF;
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		return -1;
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	}
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	if(oldd == newd && _fdinfo[newd].flags&FD_ISOPEN)
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		return newd;
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	close(newd);
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	return fcntl(oldd, F_DUPFD, newd);
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}