diff options
| -rw-r--r-- | .gitignore | 15 | ||||
| -rw-r--r-- | flash-memory/ubifs/pres_ubifs_de.tex | 2 | ||||
| -rw-r--r-- | kernel-devel/char-device/example/kernel/Makefile | 13 | ||||
| -rw-r--r-- | kernel-devel/char-device/example/kernel/huhu.c | 64 | ||||
| -rw-r--r-- | kernel-devel/char-device/example/user/Makefile | 6 | ||||
| -rw-r--r-- | kernel-devel/char-device/example/user/huhu.c | 28 |
6 files changed, 127 insertions, 1 deletions
@@ -0,0 +1,15 @@ +*/*/*.pdf +*/*/*.aux +*/*/*.log +*/*/*.nav +*/*/*.toc +*/*/*.out +*/*/*.snm +*/*/*.vrb +kernel-devel/module-basics/vain/.* +kernel-devel/module-basics/vain/Module.symvers +kernel-devel/module-basics/vain/modules.order +kernel-devel/module-basics/vain/vain.ko +kernel-devel/module-basics/vain/vain.mod.c +kernel-devel/module-basics/vain/vain.mod.o +kernel-devel/module-basics/vain/vain.o diff --git a/flash-memory/ubifs/pres_ubifs_de.tex b/flash-memory/ubifs/pres_ubifs_de.tex index d530b94..da11c8c 100644 --- a/flash-memory/ubifs/pres_ubifs_de.tex +++ b/flash-memory/ubifs/pres_ubifs_de.tex @@ -17,7 +17,7 @@ \begin{frame} \begin{figure}[h] \centering -\includegraphics[width=8cm]{images/myimage.jpg} +%\includegraphics[width=8cm]{images/myimage.jpg} \end{figure} \end{frame} diff --git a/kernel-devel/char-device/example/kernel/Makefile b/kernel-devel/char-device/example/kernel/Makefile new file mode 100644 index 0000000..822c7d7 --- /dev/null +++ b/kernel-devel/char-device/example/kernel/Makefile @@ -0,0 +1,13 @@ +# If KERNELRELEASE is defined, we've been invoked from the +# kernel build system and can use its language. +ifneq ($(KERNELRELEASE),) + obj-m := huhu.o + +# Otherwise we were called directly from the command +# line; invoke the kernel build system. +else + KERNELDIR ?= /lib/modules/$(shell uname -r)/build + PWD := $(shell pwd) +default: + $(MAKE) -C $(KERNELDIR) M=$(PWD) modules +endif diff --git a/kernel-devel/char-device/example/kernel/huhu.c b/kernel-devel/char-device/example/kernel/huhu.c new file mode 100644 index 0000000..99eafe7 --- /dev/null +++ b/kernel-devel/char-device/example/kernel/huhu.c @@ -0,0 +1,64 @@ +#include <linux/init.h> +#include <linux/module.h> +#include <linux/fs.h> + +static int major; + +static int huhu_open(struct inode *node, struct file *f) +{ + printk(KERN_INFO "huhu_open: done\n"); + return 0; +} + +static int huhu_release(struct inode *node, struct file *f) +{ + printk(KERN_INFO "huhu_release: done\n"); + return 0; +} + +static ssize_t huhu_read(struct file *f, char __user *u, size_t s, loff_t *l) +{ + printk(KERN_INFO "huhu_read\n"); + return 0; +} + +static ssize_t huhu_write (struct file *f, const char __user *u, size_t s, + loff_t *l) +{ + printk(KERN_INFO "huhu_write\n"); + return 0; +} + +static const struct file_operations huhu_fops = { + .owner = THIS_MODULE, + .open = huhu_open, + .release = huhu_release, + .read = huhu_read, + .write = huhu_write, +}; + +static int huhu_init(void) +{ + major = register_chrdev (0, "huhu", &huhu_fops); + if (major < 0) + { + printk(KERN_ERR "huhu_init: register_chrdev failed\n"); + return major; + } + printk(KERN_INFO "mknod /dev/huhu c %d 0", major); + return 0; +} + +static void huhu_exit(void) +{ + unregister_chrdev (major, "huhu"); + printk(KERN_INFO "huhu_exit: done\n"); +} + +module_init(huhu_init); +module_exit(huhu_exit); + +MODULE_AUTHOR("Manuel Traut <manut@linutronix.de>"); +MODULE_DESCRIPTION("a more or less useless module using char"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0815"); diff --git a/kernel-devel/char-device/example/user/Makefile b/kernel-devel/char-device/example/user/Makefile new file mode 100644 index 0000000..66a330c --- /dev/null +++ b/kernel-devel/char-device/example/user/Makefile @@ -0,0 +1,6 @@ +OBJECTS=huhu.o + +all: $(OBJECTS) + gcc -o huhu $(OBJECTS) +clean: + rm -f $(OBJECTS) huhu diff --git a/kernel-devel/char-device/example/user/huhu.c b/kernel-devel/char-device/example/user/huhu.c new file mode 100644 index 0000000..e86c126 --- /dev/null +++ b/kernel-devel/char-device/example/user/huhu.c @@ -0,0 +1,28 @@ +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> + +int main (int argc, char **argv) +{ + int ret = 0; + FILE *fp; + + fp = fopen ("/dev/huhu", "r+"); + if (!fp) + { + perror ("open /dev/huhu failed"); + ret = errno; + goto out; + } + + system ("/bin/lsmod | grep huhu"); + + ret = fclose (fp); + if (ret) + { + perror ("close /dev/huhu failed"); + goto out; + } +out: + return ret; +} |