├── system call os.pdf
├── OSSP_Individual_Bethelhem_Degsew_BDU 1601067_A_.pdf
├── README.md
└── system call iseek().c


/system call os.pdf:
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https://raw.githubusercontent.com/Bethy-de/Bethelhem/HEAD/system call os.pdf


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/OSSP_Individual_Bethelhem_Degsew_BDU 1601067_A_.pdf:
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https://raw.githubusercontent.com/Bethy-de/Bethelhem/HEAD/OSSP_Individual_Bethelhem_Degsew_BDU 1601067_A_.pdf


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/README.md:
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1 | # Peppermint OS Installation Guide
2 | 
3 | This repository contains a detailed guide for installing Peppermint OS, a lightweight and cloud-integrated Linux distribution designed for speed and efficiency. It covers system requirements, installation steps, supported file systems, virtualization concepts, and troubleshooting tips to ensure a smooth setup experience.
4 | 
5 | # lseek System Call Implementation
6 | 
7 | This repository provides a C implementation of the `lseek` system call, demonstrating how to manipulate file offsets for efficient read/write operations. The project showcases reading from `start.txt`, writing to `end.txt`, and selecting alternate bytes to process file data effectively. For details, refer to the source code and documentation.
8 | 
9 | 


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/system call iseek().c:
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 1 | #include <stdio.h> 
 2 | #include <unistd.h> 
 3 | #include <sys/types.h> 
 4 | #include <fcntl.h> 
 5 |  
 6 | void func(char arr[], int n) 
 7 | { 
 8 |     int f_write = open("start.txt", O_RDONLY); 
 9 |  
10 |     int f_read = open("end.txt", O_WRONLY); 
11 |  
12 |     int count = 0; 
13 |     while (read(f_write, arr, 1)) 
14 |     { 
15 |         // to write the 1st byte of the input file in 
16 |         // the output file 
17 |         if (count < n) 
18 |         { 
19 |             // SEEK_CUR specifies that 
20 |             // the offset provided is relative to the 
21 |             // current file position 
22 |             lseek (f_write, n, SEEK_CUR); 
23 |             write (f_read, arr, 1); 
24 |             count = n; 
25 |         } 
26 |  
27 |         // After the nth byte (now taking the alternate 
28 |         // nth byte) 
29 |         else 
30 |         { 
31 |             count = (2*n); 
32 |             lseek(f_write, count, SEEK_CUR); 
33 |             write(f_read, arr, 1); 
34 |         } 
35 |     } 
36 |     close(f_write); 
37 |     close(f_read); 
38 | } 
39 |  
40 | int main() 
41 | { 
42 |     char arr[100]; 
43 |     int n; 
44 |     n = 5; 
45 |     // Calling for the function 
46 |     func(arr, n); 
47 |     return 0;
48 |   }
49 | 


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