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WebSVN – planix.SVN – Blame – /os/branches/feature_tlsv12/sys/src/cmd/auth/lib/readn.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include "authcmdlib.h"
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/*
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 *  read exactly len bytes
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 */
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int
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readn(int fd, char *buf, int len)
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{
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	int m, n;
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	for(n = 0; n < len; n += m){
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		m = read(fd, buf+n, len-n);
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		if(m <= 0)
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			return -1;
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	}
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	return n;
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}