I think it is good for you to read LDD3 or google some corresponding materials at first.
2014-05-27 20:48 GMT+08:00 Lucas Tanure <[email protected]>: > Hi! > > Goal, when the user do : > # head -1 /dev/miscdrv > > The driver prints: Hello World! > > Steps: > # Make > # insmod misc.ko > # head -1 /dev/miscdrv > > Why my driver doesn't work ? > > What is worg with my read operation? > > static ssize_t > misc_drv_read(struct file *filp, char __user * buf, size_t count, loff_t * > offp){ > int nbytes; > char * string = "hello World"; > nbytes = copy_to_user(buf, string, 12); > return nbytes; > } > > > -- > Lucas Tanure > Brazil > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
