20 lines
782 B
Plaintext
20 lines
782 B
Plaintext
read
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====
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:title: Shellcode Compiler Runtime
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---------------------------------------------
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ssize_t read(int fd, void* buf, size_t count);
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---------------------------------------------
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Reads `count` bytes from the file handle `fd`, and places the result in `buf`. Returns the number of bytes read, or
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the negation of the error code on error. It is possible for the number of bytes read to be smaller than the number
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of bytes requested.
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IMPORTANT: If the system call is interrupted, this function will return `-EINTR`. This differs from most C runtimes,
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where `-1` is returned with `errno` set to `EINTR`. As this runtime does not have `errno`, callers should check
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for `-EINTR` and a result less than zero in the error checking code.
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See also
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--------
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link:write.html[write]
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