22 lines
824 B
Plaintext
22 lines
824 B
Plaintext
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fcntl
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=====
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:title: Shellcode Compiler Runtime
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---------------------------------------------
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int fcntl(int fd, int cmd, size_t arg);
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---------------------------------------------
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Issues a file descriptor command. The available commands vary by platform, but the most common commands, such as `F_SETFL`, are
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available on all platforms. Returns the result of the command, the meaning of which varies by the command sent.
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IMPORTANT: In the standard C runtime implementation of this function, the `arg` parameter is optional. This runtime always
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requires the third argument. For commands that do not need the `arg` parameter, it will be ignored. The `__undefined`
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intrinsic can be used for ignored parameters.
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See also
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--------
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link:dup2.html[dup2],
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link:open.html[open],
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link:pipe.html[pipe],
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link:socket.html[socket]
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