32 lines
779 B
Groff
32 lines
779 B
Groff
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.TH GETSOCKOPT 2
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.SH NAME
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getsockopt \- get the value of a socket option.
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.SH SYNOPSIS
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.ft B
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#include <sys/socket.h>
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.in +5
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.ti -5
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int getsockopt(int \fIsd\fP, int \fIlevel\fP, int \fIopt_name\fP, void * \fIopt_val\fP, socklen_t * \fIopt_len\fP);
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.br
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.ft P
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.SH DESCRIPTION
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getsockopt() provides an interface to get the value of a specific
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option, referenced by \fIopt_name\fP, for a given socket descriptor
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\fIsd\fP.
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.SH RETURN VALUES
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On success, this function returns 0. On error, -1 is returned and
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\fIerrno\fP is set.
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.SH ERRORS
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.TP 15
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[ENOSYS]
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The option \fIopt_name\fP is not available/supported at the \fIlevel\fP
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specified for the socket \fIsd\fP.
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.TP 15
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[ENOTSOCK]
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\fIsd\fP is not a socket descriptor.
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.SH SEE ALSO
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.BR socket(2),
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.BR socketpair(2),
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.BR setsockopt(2)
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