System Call
N/A
系统调用
System Call · N/A · 系统调用 · SIS-tem kawl · syscall · kernel API · Operating Systems · kernel · api · osOperating Systemssyscall kernel API/SIS-tem kawl/
Also known as: syscall, kernel API
Last updated August 8, 2026
Definition
A system call is how a user program requests a service from the operating system kernel, such as reading a file or creating a process.
Real-World Example
When your app opens a document, it ultimately issues system calls that ask the kernel to talk to the disk on its behalf.
References
Related terms
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