System Calls
A programmatic way to shift from user mode to kernel mode.
File Related
For files. Open(), Read(), Write(), Close(), Create file etc.
Device Related
For hardware. Read, Write, Reposition, ioctl, fcntl.
Information
get Pid, attributes, get System time and data.
Process Control
Load, Execute, abort, Fork(imp), Wait, Signal, Allocate etc.
Communication
Pipe(), Create/delete Connections, Shmget().
Protection & Security
chmod etc.
Fork System Call
- Used to create a child process, which is a clone of the parent process, with a different ID.
- Fork() returns 0 for child, +1 for parent, -1 if child couldn't be created.
- The child process is executed parrallely and concurrently with the parent process.
- Total number of processes = 2^n, where n is the number of times fork() has been invoked.
- Total number of child processes = 2^n - 1, where n is the number of times fork() has been invoked.
Conclusion
You can read other articles written by me through these links.
Operating System Series
1. Introduction & Types of OS
2. Process States & Lifecycle
3. System Calls
4. User Mode vs Kernel Mode
5. CPU Process Scheduling
6. Process Synchronization
7. Deadlocks
8. Memory Management
9. Disk Management & Scheduling
10. File System in OS
11. Protection & Security
System Design Series
Introduction To Parallel Computing
Deep Dive Into Virtualization
Insights Into Distributed Computing
Cloud Computing Series
1. Cloud Service Models
2. Cloud Deployment Models
3. Cloud Security
4. Cloud Architecture
5. Cloud Storage
6. Networking In The Cloud
7. Cloud Cost Management
8. DevOps In Cloud & CI/CD
9. Serverless Computing
10. Container Orchestration
11. Cloud Migration
12. Cloud Monitoring & Management
13. Edge Computing In Cloud
14. Machine Learning In Cloud
Computer Networking Series
1. Computer Networking Fundamentals
2. OSI Model
3. TCP/IP Model : Application Layer
4. TCP/IP Model : Transport Layer
5. TCP/IP Model : Network Layer
6. TCP/IP Model : Data Link Layer
Version Control Series
1. Complete Guide to Git Commands
2. Create & Merge Pull Requests
3. Making Open Source Contributions
Linux
Complete Guide to Linux Commands
Thanks For Reading! 💙
Garvit Singh