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| SUFFIX_ATTACH(3) | libdill Library Functions | SUFFIX_ATTACH(3) |
NAME
suffix_attach - creates SUFFIX protocol on top of underlying socketSYNOPSIS
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#include <libdill.h> int suffix_attach( int s, const void* suffix, size_t suffixlen);
DESCRIPTION
SUFFIX is a message-based protocol that delimits messages by specific byte sequences. For example, many protocols are line-based, with individual messages separated by CR+LF sequence.This function instantiates SUFFIX protocol on top of the underlying protocol.
s: Handle of the underlying socket. It must be a bytestream protocol.
suffix: The delimiter byte sequence.
suffixlen: The size of the delimiter, in bytes.
The socket can be cleanly shut down using suffix_detach function.
This function is not available if libdill is compiled with --disable-sockets option.
RETURN VALUE
In case of success the function returns newly created socket handle. In case of error it returns -1 and sets errno to one of the values below.ERRORS
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- EBADF: Invalid handle.
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- EMFILE: The maximum number of file descriptors in the process are already open.
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- ENFILE: The maximum number of file descriptors in the system are already open.
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- ENOMEM: Not enough memory.
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- ENOTSUP: The handle does not support this operation.
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- EPROTO: Underlying socket is not a bytestream socket.
EXAMPLE
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int s = tcp_connect(&addr, -1); s = suffix_attach(s, " ", 2); msend(s, "ABC", 3, -1); char buf[256]; ssize_t sz = mrecv(s, buf, sizeof(buf), -1); s = suffix_detach(s, -1); tcp_close(s);
SEE ALSO
hclose(3) mrecv(3) mrecvl(3) msend(3) msendl(3) suffix_attach_mem(3) suffix_detach(3)| libdill |
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