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Annotation of 43BSD/ingres/source/gutil/set_so_buf.c, revision 1.1.1.1

1.1       root        1: # include      <stdio.h>
                      2: # include      <sgtty.h>
                      3: # include      <ingres.h>
                      4: # include      <sccs.h>
                      5: 
                      6: SCCSID(@(#)set_so_buf.c        8.1     12/31/84)
                      7: 
                      8: /*
                      9: **  SET_SO_BUF -- set standard output buffer conditionally
                     10: **
                     11: **     This routine sets the standard output buffer conditionally,
                     12: **     based on whether or not it is a terminal.  If it is, it
                     13: **     does not set the output; otherwise, it buffers the output.
                     14: **     The buffer is contained internally.
                     15: **
                     16: **     Parameters:
                     17: **             none
                     18: **
                     19: **     Returns:
                     20: **             TRUE -- if buffer was set
                     21: **             FALSE -- otherwise
                     22: **
                     23: **     Side Effects:
                     24: **             The standard output is left buffered or unchanged.
                     25: */
                     26: 
                     27: set_so_buf()
                     28: {
                     29:        extern int      errno;
                     30:        struct sgttyb   gttybuf;
                     31:        static char     buffer[BUFSIZ];
                     32: 
                     33:        /* check for standard output is tty */
                     34:        if (gtty(fileno(stdout), &gttybuf))
                     35:        {
                     36:                /* no: reset errno and buffer */
                     37:                errno = 0;
                     38:                setbuf(stdout, buffer);
                     39: 
                     40:                return (TRUE);
                     41:        }
                     42: 
                     43:        return (FALSE);
                     44: }

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