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Annotation of xinu/sys/ttyopen.c, revision 1.1.1.1

1.1       root        1: /* ttyopen.c - ttyopen */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: 
                      6: /*------------------------------------------------------------------------
                      7:  *  ttyopen - open tty device and return return descriptor (for namespace)
                      8:  *------------------------------------------------------------------------
                      9:  */
                     10: ttyopen(devptr, nam, mode)
                     11: struct devsw   *devptr;
                     12: char   *nam;
                     13: char   *mode;
                     14: {
                     15: 
                     16:        /* This routine is not usually used to open tty devices,   */
                     17:        /* but is provided so that automatic calls to open do not  */
                     18:        /* fail.  It returns SYSERR unless called with a null name */
                     19: 
                     20:        if (*nam == '\0')
                     21:                return( devptr->dvnum );
                     22:        else
                     23:                return(SYSERR);
                     24: }

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