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Annotation of 43BSD/contrib/mh/sbr/discard.c, revision 1.1

1.1     ! root        1: /* discard.c - discard output on a file pointer */
        !             2: 
        !             3: #include "../h/mh.h"
        !             4: #include <stdio.h>
        !             5: #ifndef        SYS5
        !             6: #include <sgtty.h>
        !             7: #else  SYS5
        !             8: #include <sys/types.h>
        !             9: #include <termio.h>
        !            10: #include <sys/ioctl.h>
        !            11: #endif SYS5
        !            12: 
        !            13: 
        !            14: void   discard (io)
        !            15: FILE   *io;
        !            16: {
        !            17: #ifndef        SYS5
        !            18:     struct sgttyb   sg;
        !            19: #else  SYS5
        !            20:     struct termio   sg;
        !            21: #endif SYS5
        !            22: 
        !            23:     if (io == NULL)
        !            24:        return;
        !            25: 
        !            26: #ifndef        SYS5
        !            27:     if (ioctl (fileno (io), TIOCGETP, (char *) &sg) != NOTOK)
        !            28:        (void) ioctl (fileno (io), TIOCSETP, (char *) &sg);
        !            29: #else  SYS5
        !            30:     if (ioctl (fileno (io), TCGETA, &sg) != NOTOK)
        !            31:        (void) ioctl (fileno (io), TCSETA, &sg);
        !            32: #endif SYS5
        !            33: 
        !            34:     if (io -> _ptr = io -> _base)
        !            35:        io -> _cnt = 0;
        !            36: }

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