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Austin
2026-02-03 09:00:30 -06:00
parent 2451448b8a
commit 4f40466733
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CS321/Homework 1/CS321 - HW1.docx
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CS321/Homework 1/Homework 1.xcodeproj/project.pbxproj
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CS321/Homework 1/Homework 1.xcodeproj/project.xcworkspace/contents.xcworkspacedata.xml
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<?xml version="1.0" encoding="UTF-8"?>
<Workspace
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location = "self:">
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CS321/Homework 1/Homework 1.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
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CS321/Homework 1/Homework 1.xcodeproj/project.xcworkspace/xcuserdata/adbennett.xcuserdatad/UserInterfaceState.xcuserstate
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CS321/Homework 1/Homework 1.xcodeproj/xcuserdata/adbennett.xcuserdatad/xcschemes/xcschememanagement.plist
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CS321/Homework 1/Homework 1/CS321 - HW1.pdf
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CS321/Homework 1/Homework 1/filecopy.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#define BUFFER_SIZE 4096
int main() {
char sourceFileName[256];
char destinationFileName[256];
int sourceFile, destinationFile;
ssize_t bytes_read, bytes_written;
char buffer[BUFFER_SIZE];
printf("Enter the source file name: ");
scanf("%255s", sourceFileName);
printf("Enter the destination file name: ");
scanf("%255s", destinationFileName);
sourceFile = open(sourceFileName, O_RDONLY);
destinationFile = open(destinationFileName, O_WRONLY | O_CREAT | O_EXCL, 0666);
// Copy data from source to destination
while ((bytes_read = read(sourceFile, buffer, BUFFER_SIZE)) > 0) {
bytes_written = write(destinationFile, buffer, bytes_read);
}
// Close files
close(sourceFile);
close(destinationFile);
printf("File copied successfully!\n");
return 0;
}
CS321/Homework 1/Homework 1/jiffies.c
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/**
* hello.c
*
* Kernel module that communicates with /proc file system.
*
* The makefile must be modified to compile this program.
* Change the line "simple.o" to "hello.o"
*
* Operating System Concepts - 10th Edition
* Copyright John Wiley & Sons - 2018
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/uaccess.h>
#define BUFFER_SIZE 128
#define PROC_NAME "jiffies"
#define MESSAGE "Hello World\n"
/**
* Function prototypes
*/
ssize_t proc_read(struct file *file, char *buf, size_t count, loff_t *pos);
static struct file_operations proc_ops = {
.owner = THIS_MODULE,
.read = proc_read,
};
static long start_jiffies;
/* This function is called when the module is loaded. */
int proc_init(void)
{
start_jiffies = jiffies;
// creates the /proc/hello entry
// the following function call is a wrapper for
// proc_create_data() passing NULL as the last argument
proc_create(PROC_NAME, 0, NULL, &proc_ops);
printk(KERN_INFO "/proc/%s created\n", PROC_NAME);
printk(KERN_INFO "Jiffies: %lu\n", jiffies);
printk(KERN_INFO "HZ: %lu\n", HZ);
return 0;
}
/* This function is called when the module is removed. */
void proc_exit(void) {
// removes the /proc/hello entry
remove_proc_entry(PROC_NAME, NULL);
printk( KERN_INFO "/proc/%s removed\n", PROC_NAME);
}
/**
* This function is called each time the /proc/hello is read.
*
* This function is called repeatedly until it returns 0, so
* there must be logic that ensures it ultimately returns 0
* once it has collected the data that is to go into the
* corresponding /proc file.
*
* params:
*
* file:
* buf: buffer in user space
* count:
* pos:
*/
ssize_t proc_read(struct file *file, char __user *usr_buf, size_t count, loff_t *pos)
{
int rv = 0;
char buffer[BUFFER_SIZE];
static int completed = 0;
if (completed) {
completed = 0;
return 0;
}
completed = 1;
rv = sprintf(buffer, "Jiffies: %lu\n\n", jiffies);
// copies the contents of buffer to userspace usr_buf
copy_to_user(usr_buf, buffer, rv);
return rv;
}
/* Macros for registering module entry and exit points. */
module_init( proc_init );
module_exit( proc_exit );
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Hello Module");
MODULE_AUTHOR("SGG");
CS321/Homework 1/Homework 1/seconds.c
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/**
* seconds.c
*
* Kernel module that communicates with /proc file system.
*
* The makefile must be modified to compile this program.
* Change the line "simple.o" to "hello.o"
*
* Operating System Concepts - 10th Edition
* Copyright John Wiley & Sons - 2018
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/uaccess.h>
#define BUFFER_SIZE 128
#define PROC_NAME "seconds"
#define MESSAGE "Hello World\n"
/**
* Function prototypes
*/
ssize_t proc_read(struct file *file, char *buf, size_t count, loff_t *pos);
static struct file_operations proc_ops = {
.owner = THIS_MODULE,
.read = proc_read,
};
static long start_jiffies;
/* This function is called when the module is loaded. */
int proc_init(void)
{
start_jiffies = jiffies;
// creates the /proc/hello entry
// the following function call is a wrapper for
// proc_create_data() passing NULL as the last argument
proc_create(PROC_NAME, 0, NULL, &proc_ops);
printk(KERN_INFO "/proc/%s created\n", PROC_NAME);
printk(KERN_INFO "Jiffies: %lu\n", jiffies);
printk(KERN_INFO "HZ: %lu\n", HZ);
return 0;
}
/* This function is called when the module is removed. */
void proc_exit(void) {
// removes the /proc/hello entry
remove_proc_entry(PROC_NAME, NULL);
printk( KERN_INFO "/proc/%s removed\n", PROC_NAME);
}
/**
* This function is called each time the /proc/hello is read.
*
* This function is called repeatedly until it returns 0, so
* there must be logic that ensures it ultimately returns 0
* once it has collected the data that is to go into the
* corresponding /proc file.
*
* params:
*
* file:
* buf: buffer in user space
* count:
* pos:
*/
ssize_t proc_read(struct file *file, char __user *usr_buf, size_t count, loff_t *pos)
{
int rv = 0;
char buffer[BUFFER_SIZE];
static int completed = 0;
long seconds = (jiffies - start_jiffies) / HZ;
if (completed) {
completed = 0;
return 0;
}
completed = 1;
rv = sprintf(buffer, "Seconds Elapsed: %lu\n\n", seconds);
// copies the contents of buffer to userspace usr_buf
copy_to_user(usr_buf, buffer, rv);
return rv;
}
/* Macros for registering module entry and exit points. */
module_init( proc_init );
module_exit( proc_exit );
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Hello Module");
MODULE_AUTHOR("SGG");