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