proc 简单使用

1， head file

#include

2, API

struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);

struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,

                                                struct proc_dir_entry *parent);

struct proc_dir_entry *create_proc_read_entry(const char *name,

        mode_t mode, struct proc_dir_entry *base,

        read_proc_t *read_proc, void * data);

void remove_proc_entry(const char *name, struct proc_dir_entry *parent);

3, read_proc_t, write_proc_t

int proc_read(char *page, char **start, off_t off, int count, int *eof, void *data)

{

        printk(KERN_INFO "enter proc_readm off = %d, count = %d\n", off, count);

        int data_len = 0;

        data_len = sprintf(page, "%d\n", pMDEV->totalsize);

        data_len -= off;

        if (data_len < 0)

                data_len = 0;

        *eof = (data_len <= count) ? 1 : 0;

        *start = page + off;

        return data_len;

}

int proc_write(char *page, char **start, off_t off, int count, int *eof, void *data)

{

        return 0;

}