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Hi all,
I've some problems with the implementation of the ioctl in kernel module I'm
developing.
I've create three files:
1) the header "device.h ":
#define MTPMC_IOC_MAGIC 254
#define MTPMC_IOC_WRITE_USER_PID _IOW(MTPMC_IOC_MAGIC, 0, pid_t)
#define MTPMC_IOC_WRITE_THREAD_PID _IOW(MTPMC_IOC_MAGIC, 1, pid_t)
#define MTPMC_IOC_READ_INITIALIZE _IOR(MTPMC_IOC_MAGIC, 2, int)
#define MTPMC_IOC_READ_NUM_THREAD _IOR(MTPMC_IOC_MAGIC, 3, int)
#define MTPMC_IOC_RESTORE_NOT_WRITABLE _IO(MTPMC_IOC_MAGIC, 4)
#define MTPMC_IOC_RESTORE_WRITABLE _IO(MTPMC_IOC_MAGIC, 5)
#define MTPMC_IOC_TIMER_FUNCTION _IOW(MTPMC_IOC_MAGIC, 6, int)
#define MTPMC_IOC_MAXNR 7
2) the kernel-space driver "device.c" which includes the header and implements
a switch as follows:
switch(cmd){
case MTPMC_IOC_WRITE_USER_PID: /* nr == 1 */
mtpmc_user = arg;
break;
case MTPMC_IOC_WRITE_THREAD_PID: /* nr == 2 */
mtpmc_pid = arg;
break;
case MTPMC_IOC_READ_INITIALIZE: /* nr == 3 */
return mtpmc_initialize();
}
3) the user-space file "user.c" which includes the header and calls ioctl in
this way:
ioctl(fd, MTPMC_IOC_WRITE_USER_PID, getpid()); /
ioctl(fd, MTPMC_IOC_WRITE_THREAD_PID, thread_pid);
r = ioctl(fd, MTPMC_IOC_READ_INITIALIZE);
Now! When I compile device.c things go well but when I try to compile the
user-space programm with the command
gcc -g -o user user.c
occurre the errors:
user.c:51: error: parse error before "pid_t"
user.c:52: error: parse error before "pid_t"
user.c:53: error: parse error before "int"
Where I'm wrong?
Thanks.
Vincenzo Mallozzi
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