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Annotation of 43BSD/contrib/mh/sbr/discard.c, revision 1.1.1.1

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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