Date: Monday, 26 March 1984  10:28-MST
From: hplabs!tektronix!teklds!azure!keithr at Ucb-Vax.ARPA
To:   info-cpm at Brl-Aos.ARPA
Re:   Aztec CII I/O Redirection (Reposted with new info)

(Reposting)

The problem of slow redirected I/O  in Aztec C is caused  by
I/O  being  unbuffered. This causes each byte of output that
is redirected to a file to be written seperately (Read  sec-
tor, place byte, write sector). No wonder is so slow.

The solution I've been using is simply changing  the  unbuf-
fered  I/O  into  buffered I/O. I've also added a few exten-
tions  which  are  "2>"  (redirect  stderr),  "2>>"  (append
stderr) and ">>" (append stdout).

To implement the fix find the file called "CROOT.C"  in  the
source   to  your  library.  It  contains  a  function  call
"Croot()".  Replace the while loop that starts  with  "while
(Argc < MAXARGS)" with the following--


       while (Argc < MAXARGS) {
               while (*cp == ' ' || *cp == '')
                  ++cp;
               if (*cp == NULL)
                  break;
               k = -1;
               switch (*cp) {
                  case '>':
                       if (*(cp+1)=='>') {
                          ++cp;
                          k = 1;
                       } else
                          k = 1;
                       break;
                  case '<':
                       k = 0;
                       break;
                  case '2':
                       if (*(cp+1)) == '>') {
                          ++cp;
                          if (*(cp+1) == '>') {
                             ++cp;
                             k = 5;
                          } else
                             k = 2;
                       }

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