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