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Annotation of linux/fs/minix/chrdev.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  linux/fs/chrdev.c
        !             3:  *
        !             4:  *  (C) 1991  Linus Torvalds
        !             5:  */
        !             6: 
        !             7: #include <linux/sched.h>
        !             8: #include <linux/minix_fs.h>
        !             9: #include <linux/tty.h>
        !            10: 
        !            11: #include <errno.h>
        !            12: #include <fcntl.h>
        !            13: #include <sys/stat.h>
        !            14: 
        !            15: /*
        !            16:  * Called every time a minix character special file is opened
        !            17:  */
        !            18: static int chrdev_open(struct inode * inode, struct file * filp)
        !            19: {
        !            20:        int i;
        !            21: 
        !            22:        i = MAJOR(inode->i_rdev);
        !            23:        if (i < MAX_CHRDEV) {
        !            24:                filp->f_op = chrdev_fops[i];
        !            25:                if (filp->f_op && filp->f_op->open)
        !            26:                        return filp->f_op->open(inode,filp);
        !            27:        }
        !            28:        return 0;
        !            29: }
        !            30: 
        !            31: /*
        !            32:  * Dummy default file-operations: the only thing this does
        !            33:  * is contain the open that then fills in the correct operations
        !            34:  * depending on the special file...
        !            35:  */
        !            36: static struct file_operations def_chr_fops = {
        !            37:        NULL,           /* lseek */
        !            38:        NULL,           /* read */
        !            39:        NULL,           /* write */
        !            40:        NULL,           /* readdir */
        !            41:        NULL,           /* select */
        !            42:        NULL,           /* ioctl */
        !            43:        chrdev_open,    /* open */
        !            44:        NULL,           /* release */
        !            45: };
        !            46: 
        !            47: struct inode_operations minix_chrdev_inode_operations = {
        !            48:        &def_chr_fops,          /* default file operations */
        !            49:        NULL,                   /* create */
        !            50:        NULL,                   /* lookup */
        !            51:        NULL,                   /* link */
        !            52:        NULL,                   /* unlink */
        !            53:        NULL,                   /* symlink */
        !            54:        NULL,                   /* mkdir */
        !            55:        NULL,                   /* rmdir */
        !            56:        NULL,                   /* mknod */
        !            57:        NULL,                   /* rename */
        !            58:        NULL,                   /* readlink */
        !            59:        NULL,                   /* follow_link */
        !            60:        minix_bmap,             /* bmap */
        !            61:        minix_truncate          /* truncate */
        !            62: };
        !            63: 

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