28 lines
990 B
Plaintext
28 lines
990 B
Plaintext
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select
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======
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:title: Shellcode Compiler Runtime
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---------------------------------------------
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int select(int nfds, fd_set* readfds, fd_set* writefds, fd_set* errorfds, struct timeval* timeout);
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---------------------------------------------
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Waits for one or more of the file handles in `readfs`, `writefds`, or `errorfds` to become available. Returns
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early if `timeout` expires. The `nfds` parameter must be set to one more than the maximum file handle
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present.
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On return, the sets are updated to include only the file handles that are ready. The return value is the total number
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of file handles that are ready, or zero on timeout. On error, the negation of the error code is returned.
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The following macros can be used to manipulate sets of file handles:
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---------------------------------------------
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FD_ZERO(&set);
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FD_SET(fd, &set);
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FD_CLR(fd, &set);
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FD_ISSET(fd, &set);
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---------------------------------------------
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See also
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--------
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link:read.html[read],
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link:write.html[write]
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