Añadidos pidevice y hang

9 files changed, 164 insertions, 74 deletions

diff --git a/pid2/Makefile b/hang/Makefile
index b9e7cfd..75750d3 100644
--- a/pid2/Makefile
+++ b/hang/Makefile
@@ -1,4 +1,4 @@
-obj-m += pid.o
+obj-m += hang1.o
 
 all:
 	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
diff --git a/hang/hang1.c b/hang/hang1.c
new file mode 100644
index 0000000..b963281
--- /dev/null
+++ b/hang/hang1.c
@@ -0,0 +1,16 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+
+static int __init hang_init(void)
+{
+	while(1);
+	return 0;
+}
+
+static void __exit hang_exit(void)
+{
+}
+
+module_init(hang_init);
+module_exit(hang_exit);
diff --git a/pid2/loader.sh b/pid2/loader.sh
deleted file mode 100644
index 579acff..0000000
--- a/pid2/loader.sh
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/bin/bash
-module="pidevice"
-device="pidevice"
-mode="644"
-
-insmod ./$module.ko $* || exit -1
-
-rm -f /dev/${device}[0-4]
-
-major=$(cat /proc/devices | grep $module | cut -f 1)
-
-echo major
-exit -1
-
-for i in {0..3}; do
-	mknod /dev/${device}$i c $major $i
-done
-
-group="staff"
-grep -q '^staff:' /etc/group || group="wheel"
-
-chgrp $group /dev/${device}[0-3]
-chmod $mode /dev/${device}[0-3]
diff --git a/pid2/pid.c b/pid2/pid.c
deleted file mode 100644
index 6362f82..0000000
--- a/pid2/pid.c
+++ /dev/null
@@ -1,50 +0,0 @@
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kdev_t.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-
-static char devname[] = "pidevice";
-static char modname[] = "pid.ko";
-static dev_t mydev;
-static struct task_struct *mytask;
-static struct task_struct *parent;
-
-static void show_processes(void)
-{
-	mytask = current;
-	parent = mytask->parent;
-
-	while (mytask->pid != parent->pid) {
-		printk(KERN_ALERT "current: %s (%d) - parent: %s (%d)\n",
-				mytask->comm, mytask->pid, parent->comm, parent->pid);
-		mytask = mytask->parent;
-		parent = mytask->parent;
-	}
-}
-
-static int __init init(void)
-{
-	int err;
-
-	printk(KERN_ALERT "%s loaded by %s (%d)\n",
-			modname, mytask->comm, mytask->pid);
-
-	if ((err = alloc_chrdev_region(&mydev, 0, 1, devname)))
-		printk(KERN_ALERT "ERROR in alloc_chrdev_region: %d\n", err);
-
-	return 0;
-}
-
-static void __exit exit(void)
-{
-	unregister_chrdev_region(mydev, 1);
-	printk(KERN_ALERT "%s unloaded\n", modname);
-}
-
-module_init(init);
-module_exit(exit);
-
-MODULE_LICENSE("GPL");
diff --git a/pidevice/Makefile b/pidevice/Makefile
new file mode 100644
index 0000000..55bcfe5
--- /dev/null
+++ b/pidevice/Makefile
@@ -0,0 +1,7 @@
+obj-m += pidevice.o
+
+all:
+	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
+
+clean:
+	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
diff --git a/pidevice/loader.sh b/pidevice/loader.sh
new file mode 100755
index 0000000..7887e1b
--- /dev/null
+++ b/pidevice/loader.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+module="pidevice"
+device="pidevice"
+mode="644"
+
+insmod ./$module.ko $* || exit -1
+
+rm -f /dev/${device}?
+
+major=$(cat /proc/devices | grep $module | cut -f 1 -d" ")
+
+#for i in {0..3}; do
+#	mknod /dev/${device}$i c $major $i
+#done
+
+mknod /dev/${device} c $major 0
+
+group="staff"
+grep -q '^staff:' /etc/group || group="wheel"
+
+#chgrp $group /dev/${device}[0-3]
+#chmod $mode /dev/${device}[0-3]
+chgrp $group /dev/${device}
+chmod $mode /dev/${device}
diff --git a/pidevice/open.py b/pidevice/open.py
new file mode 100755
index 0000000..d75f876
--- /dev/null
+++ b/pidevice/open.py
@@ -0,0 +1,4 @@
+#!/usr/bin/python2
+
+f = open("/dev/pidevice", "r+");
+f.close()
diff --git a/pidevice/pidevice.c b/pidevice/pidevice.c
new file mode 100644
index 0000000..3c5d3b4
--- /dev/null
+++ b/pidevice/pidevice.c
@@ -0,0 +1,104 @@
+#include <asm/uaccess.h>
+#include <linux/cdev.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+
+static char devname[] = "pidevice";
+static char modname[] = "pidevice.ko";
+static dev_t mydev = 0;
+static struct cdev cdev;
+static struct task_struct *mytask;
+static struct task_struct *parent;
+
+static int count = 1;
+
+int pidev_open(struct inode *i, struct file *filp)
+{
+	count = 1;
+	printk(KERN_ALERT "Device (%d-%d) opened\n",
+			imajor(i), iminor(i));
+	printk(KERN_ALERT "Mode: %c%c\n", filp->f_mode & FMODE_READ ? 'R' : '-',
+			filp->f_mode & FMODE_WRITE ? 'W' : '-');
+	return 0;
+}
+
+ssize_t pidev_read(struct file *filp, char __user *buf,
+		size_t len, loff_t *off)
+{
+	if (count--) {
+		copy_to_user(buf, modname, 12);
+		return 12;
+	} else {
+		return 0;
+	}
+}
+
+ssize_t pidev_write(struct file *filp, const char __user *buf,
+		size_t len, loff_t *off)
+{
+	char localbuf[40];
+	copy_from_user(localbuf, buf, 40);
+	localbuf[len] = '\0';
+
+	printk(KERN_ALERT "Recibido: %s", localbuf);
+	return -EPERM;
+}
+
+struct file_operations fops = {
+	.owner = THIS_MODULE,
+	.open = pidev_open,
+	.read = pidev_read,
+	.write = pidev_write,
+};
+
+static void show_processes(void)
+{
+	mytask = current;
+	parent = mytask->parent;
+
+	while (mytask->pid != parent->pid) {
+		printk(KERN_ALERT "current: %s (%d) - parent: %s (%d)\n",
+				mytask->comm, mytask->pid, parent->comm, parent->pid);
+		mytask = mytask->parent;
+		parent = mytask->parent;
+	}
+}
+
+static int __init init(void)
+{
+	int err;
+
+	printk(KERN_ALERT "%s loaded by %s (%d)\n",
+			modname, current->comm, current->pid);
+
+	if ((err = alloc_chrdev_region(&mydev, 0, 1, devname)))
+		printk(KERN_ALERT "ERROR in alloc_chrdev_region: %d\n", err);
+	else
+		printk(KERN_ALERT "%s successfully registered with %d %d numbers\n",
+				devname, MAJOR(mydev), MINOR(mydev));
+
+	cdev_init(&cdev, &fops);
+	cdev.owner = THIS_MODULE;
+	if ((err = cdev_add(&cdev, mydev, 1)))
+		printk(KERN_ALERT "ERROR in cdev_add: %d\n", err);
+
+	return 0;
+}
+
+static void __exit exit(void)
+{
+	unregister_chrdev_region(mydev, 1);
+	cdev_del(&cdev);
+	printk(KERN_ALERT "%s unloaded\n", modname);
+}
+
+module_init(init);
+module_exit(exit);
+
+MODULE_LICENSE("GPL");
diff --git a/pidevice/unloader.sh b/pidevice/unloader.sh
new file mode 100755
index 0000000..ffa2c38
--- /dev/null
+++ b/pidevice/unloader.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+module="pidevice"
+device="pidevice"
+
+#rm -f /dev/$device[0-3]
+rm -f /dev/$device
+rmmod $module