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Diffstat (limited to 'man2/bind.2')
| -rw-r--r-- | man2/bind.2 | 286 |
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diff --git a/man2/bind.2 b/man2/bind.2 deleted file mode 100644 index 0fc3308..0000000 --- a/man2/bind.2 +++ /dev/null @@ -1,286 +0,0 @@ -.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu) -.\" and Copyright 2005-2007, Michael Kerrisk <mtk.manpages@gmail.com> -.\" Portions extracted from /usr/include/sys/socket.h, which does not have -.\" any authorship information in it. It is probably available under the GPL. -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.\" -.\" Other portions are from the 6.9 (Berkeley) 3/10/91 man page: -.\" -.\" Copyright (c) 1983 The Regents of the University of California. -.\" All rights reserved. -.\" -.\" SPDX-License-Identifier: BSD-4-Clause-UC -.\" -.\" Modified Mon Oct 21 23:05:29 EDT 1996 by Eric S. Raymond <esr@thyrsus.com> -.\" Modified 1998 by Andi Kleen -.\" $Id: bind.2,v 1.3 1999/04/23 19:56:07 freitag Exp $ -.\" Modified 2004-06-23 by Michael Kerrisk <mtk.manpages@gmail.com> -.\" -.TH bind 2 2023-10-31 "Linux man-pages 6.7" -.SH NAME -bind \- bind a name to a socket -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.B #include <sys/socket.h> -.P -.BI "int bind(int " sockfd ", const struct sockaddr *" addr , -.BI " socklen_t " addrlen ); -.fi -.SH DESCRIPTION -When a socket is created with -.BR socket (2), -it exists in a name space (address family) but has no address assigned to it. -.BR bind () -assigns the address specified by -.I addr -to the socket referred to by the file descriptor -.IR sockfd . -.I addrlen -specifies the size, in bytes, of the address structure pointed to by -.IR addr . -Traditionally, this operation is called \[lq]assigning a name to a socket\[rq]. -.P -It is normally necessary to assign a local address using -.BR bind () -before a -.B SOCK_STREAM -socket may receive connections (see -.BR accept (2)). -.P -The rules used in name binding vary between address families. -Consult the manual entries in Section 7 for detailed information. -For -.BR AF_INET , -see -.BR ip (7); -for -.BR AF_INET6 , -see -.BR ipv6 (7); -for -.BR AF_UNIX , -see -.BR unix (7); -for -.BR AF_APPLETALK , -see -.BR ddp (7); -for -.BR AF_PACKET , -see -.BR packet (7); -for -.BR AF_X25 , -see -.BR x25 (7); -and for -.BR AF_NETLINK , -see -.BR netlink (7). -.P -The actual structure passed for the -.I addr -argument will depend on the address family. -The -.I sockaddr -structure is defined as something like: -.P -.in +4n -.EX -struct sockaddr { - sa_family_t sa_family; - char sa_data[14]; -} -.EE -.in -.P -The only purpose of this structure is to cast the structure -pointer passed in -.I addr -in order to avoid compiler warnings. -See EXAMPLES below. -.SH RETURN VALUE -On success, zero is returned. -On error, \-1 is returned, and -.I errno -is set to indicate the error. -.SH ERRORS -.TP -.B EACCES -.\" e.g., privileged port in AF_INET domain -The address is protected, and the user is not the superuser. -.TP -.B EADDRINUSE -The given address is already in use. -.TP -.B EADDRINUSE -(Internet domain sockets) -The port number was specified as zero in the socket address structure, -but, upon attempting to bind to an ephemeral port, -it was determined that all port numbers in the ephemeral port range -are currently in use. -See the discussion of -.I /proc/sys/net/ipv4/ip_local_port_range -.BR ip (7). -.TP -.B EBADF -.I sockfd -is not a valid file descriptor. -.TP -.B EINVAL -The socket is already bound to an address. -.\" This may change in the future: see -.\" .I linux/unix/sock.c for details. -.TP -.B EINVAL -.I addrlen -is wrong, or -.I addr -is not a valid address for this socket's domain. -.TP -.B ENOTSOCK -The file descriptor -.I sockfd -does not refer to a socket. -.P -The following errors are specific to UNIX domain -.RB ( AF_UNIX ) -sockets: -.TP -.B EACCES -Search permission is denied on a component of the path prefix. -(See also -.BR path_resolution (7).) -.TP -.B EADDRNOTAVAIL -A nonexistent interface was requested or the requested -address was not local. -.TP -.B EFAULT -.I addr -points outside the user's accessible address space. -.TP -.B ELOOP -Too many symbolic links were encountered in resolving -.IR addr . -.TP -.B ENAMETOOLONG -.I addr -is too long. -.TP -.B ENOENT -A component in the directory prefix of the socket pathname does not exist. -.TP -.B ENOMEM -Insufficient kernel memory was available. -.TP -.B ENOTDIR -A component of the path prefix is not a directory. -.TP -.B EROFS -The socket inode would reside on a read-only filesystem. -.SH STANDARDS -POSIX.1-2008. -.SH HISTORY -POSIX.1-2001, SVr4, 4.4BSD -.RB ( bind () -first appeared in 4.2BSD). -.\" SVr4 documents an additional -.\" .B ENOSR -.\" general error condition, and -.\" additional -.\" .B EIO -.\" and -.\" .B EISDIR -.\" UNIX-domain error conditions. -.SH BUGS -The transparent proxy options are not described. -.\" FIXME Document transparent proxy options -.SH EXAMPLES -An example of the use of -.BR bind () -with Internet domain sockets can be found in -.BR getaddrinfo (3). -.P -The following example shows how to bind a stream socket in the UNIX -.RB ( AF_UNIX ) -domain, and accept connections: -.\" listen.7 refers to this example. -.\" accept.7 refers to this example. -.\" unix.7 refers to this example. -.P -.\" SRC BEGIN (bind.c) -.EX -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/socket.h> -#include <sys/un.h> -#include <unistd.h> -\& -#define MY_SOCK_PATH "/somepath" -#define LISTEN_BACKLOG 50 -\& -#define handle_error(msg) \e - do { perror(msg); exit(EXIT_FAILURE); } while (0) -\& -int -main(void) -{ - int sfd, cfd; - socklen_t peer_addr_size; - struct sockaddr_un my_addr, peer_addr; -\& - sfd = socket(AF_UNIX, SOCK_STREAM, 0); - if (sfd == \-1) - handle_error("socket"); -\& - memset(&my_addr, 0, sizeof(my_addr)); - my_addr.sun_family = AF_UNIX; - strncpy(my_addr.sun_path, MY_SOCK_PATH, - sizeof(my_addr.sun_path) \- 1); -\& - if (bind(sfd, (struct sockaddr *) &my_addr, - sizeof(my_addr)) == \-1) - handle_error("bind"); -\& - if (listen(sfd, LISTEN_BACKLOG) == \-1) - handle_error("listen"); -\& - /* Now we can accept incoming connections one - at a time using accept(2). */ -\& - peer_addr_size = sizeof(peer_addr); - cfd = accept(sfd, (struct sockaddr *) &peer_addr, - &peer_addr_size); - if (cfd == \-1) - handle_error("accept"); -\& - /* Code to deal with incoming connection(s)... */ -\& - if (close(sfd) == \-1) - handle_error("close"); -\& - if (unlink(MY_SOCK_PATH) == \-1) - handle_error("unlink"); -} -.EE -.\" SRC END -.SH SEE ALSO -.BR accept (2), -.BR connect (2), -.BR getsockname (2), -.BR listen (2), -.BR socket (2), -.BR getaddrinfo (3), -.BR getifaddrs (3), -.BR ip (7), -.BR ipv6 (7), -.BR path_resolution (7), -.BR socket (7), -.BR unix (7) |