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diff --git a/man-pages-posix-2017/man3p/setsockopt.3p b/man-pages-posix-2017/man3p/setsockopt.3p new file mode 100644 index 0000000..49e71c8 --- /dev/null +++ b/man-pages-posix-2017/man3p/setsockopt.3p @@ -0,0 +1,167 @@ +'\" et +.TH SETSOCKOPT "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" +.SH PROLOG +This manual page is part of the POSIX Programmer's Manual. +The Linux implementation of this interface may differ (consult +the corresponding Linux manual page for details of Linux behavior), +or the interface may not be implemented on Linux. +.\" +.SH NAME +setsockopt +\(em set the socket options +.SH SYNOPSIS +.LP +.nf +#include <sys/socket.h> +.P +int setsockopt(int \fIsocket\fP, int \fIlevel\fP, int \fIoption_name\fP, + const void *\fIoption_value\fP, socklen_t \fIoption_len\fP); +.fi +.SH DESCRIPTION +The +\fIsetsockopt\fR() +function shall set the option specified by the +.IR option_name +argument, at the protocol level specified by the +.IR level +argument, to the value pointed to by the +.IR option_value +argument for the socket associated with the file descriptor specified +by the +.IR socket +argument. +.P +The +.IR level +argument specifies the protocol level at which the option resides. To +set options at the socket level, specify the +.IR level +argument as SOL_SOCKET. To set options at other levels, supply the +appropriate +.IR level +identifier for the protocol controlling the option. For example, to +indicate that an option is interpreted by the TCP (Transport Control +Protocol), set +.IR level +to IPPROTO_TCP as defined in the +.IR <netinet/in.h> +header. +.P +The +.IR option_name +argument specifies a single option to set. It can be one of the +socket-level options defined in +.IR "\fB<sys_socket.h>\fP" +and described in +.IR "Section 2.10.16" ", " "Use of Options". +If +.IR option_name +is equal to SO_RCVTIMEO or SO_SNDTIMEO and the implementation supports +setting the option, it is unspecified whether the +.BR "struct timeval" +pointed to by +.IR option_value +is stored as provided by this function or is rounded up to align with +the resolution of the clock being used. If +\fIsetsockopt\fR() +is called with +.IR option_name +equal to SO_ACCEPTCONN, SO_ERROR, or SO_TYPE, the behavior is unspecified. +.SH "RETURN VALUE" +Upon successful completion, +\fIsetsockopt\fR() +shall return 0. Otherwise, \-1 shall be returned and +.IR errno +set to indicate the error. +.SH ERRORS +The +\fIsetsockopt\fR() +function shall fail if: +.TP +.BR EBADF +The +.IR socket +argument is not a valid file descriptor. +.TP +.BR EDOM +The send and receive timeout values are too big to fit into the timeout +fields in the socket structure. +.TP +.BR EINVAL +The specified option is invalid at the specified socket level or the +socket has been shut down. +.TP +.BR EISCONN +The socket is already connected, and a specified option cannot be set +while the socket is connected. +.TP +.BR ENOPROTOOPT +.br +The option is not supported by the protocol. +.TP +.BR ENOTSOCK +The +.IR socket +argument does not refer to a socket. +.P +The +\fIsetsockopt\fR() +function may fail if: +.TP +.BR ENOMEM +There was insufficient memory available for the operation to complete. +.TP +.BR ENOBUFS +Insufficient resources are available in the system to complete the +call. +.LP +.IR "The following sections are informative." +.SH "EXAMPLES" +None. +.SH "APPLICATION USAGE" +The +\fIsetsockopt\fR() +function provides an application program with the means to control +socket behavior. An application program can use +\fIsetsockopt\fR() +to allocate buffer space, control timeouts, or permit socket data +broadcasts. The +.IR <sys/socket.h> +header defines the socket-level options available to +\fIsetsockopt\fR(). +.P +Options may exist at multiple protocol levels. The SO_ options are +always present at the uppermost socket level. +.SH "RATIONALE" +None. +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +.IR "Section 2.10" ", " "Sockets", +.IR "\fIbind\fR\^(\|)", +.IR "\fIendprotoent\fR\^(\|)", +.IR "\fIgetsockopt\fR\^(\|)", +.IR "\fIsocket\fR\^(\|)" +.P +The Base Definitions volume of POSIX.1\(hy2017, +.IR "\fB<netinet_in.h>\fP", +.IR "\fB<sys_socket.h>\fP" +.\" +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1-2017, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 7, 2018 Edition, +Copyright (C) 2018 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. +In the event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . +.PP +Any typographical or formatting errors that appear +in this page are most likely +to have been introduced during the conversion of the source files to +man page format. To report such errors, see +https://www.kernel.org/doc/man-pages/reporting_bugs.html . |