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>BIND(2) System Calls Manual BIND(2)
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>BIND(2) System Calls Manual BIND(2)
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NAME
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NAME
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bind - bind a name to a socket
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bind - bind a name to a socket
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SYNOPSIS
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SYNOPSIS
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#include <sys/types.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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int
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int
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bind(int s, const struct sockaddr *name, socklen_t namelen);
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bind(int s, const struct sockaddr *name, socklen_t namelen);
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DESCRIPTION
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DESCRIPTION
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bind() assigns a name to an unnamed socket. When a socket is created
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bind() assigns a name to an unnamed socket. When a socket is created
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with socket(2) it exists in a name space (address family) but has no name
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with socket(2) it exists in a name space (address family) but has no name
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assigned. bind() requests that name be assigned to the socket.
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assigned. bind() requests that name be assigned to the socket.
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NOTES
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NOTES
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Binding a name in the UNIX domain creates a socket in the file system
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Binding a name in the UNIX domain creates a socket in the file system
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that must be deleted by the caller when it is no longer needed (using
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that must be deleted by the caller when it is no longer needed (using
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unlink(2)).
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unlink(2)).
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The rules used in name binding vary between communication domains. Con-
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The rules used in name binding vary between communication domains. Con-
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sult the manual entries in section 4 for detailed information.
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sult the manual entries in section 4 for detailed information.
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RETURN VALUES
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RETURN VALUES
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If the bind is successful, a 0 value is returned. A return value of -1
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If the bind is successful, a 0 value is returned. A return value of -1
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indicates an error, which is further specified in the global errno.
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indicates an error, which is further specified in the global errno.
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ERRORS
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ERRORS
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The bind() call will fail if:
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The bind() call will fail if:
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[EBADF] S is not a valid descriptor.
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[EBADF] S is not a valid descriptor.
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[ENOTSOCK] S is not a socket.
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[ENOTSOCK] S is not a socket.
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[EADDRNOTAVAIL] The specified address is not available from the local
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[EADDRNOTAVAIL] The specified address is not available from the local
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machine.
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machine.
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[EADDRINUSE] The specified address is already in use.
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[EADDRINUSE] The specified address is already in use.
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[EINVAL] The socket is already bound to an address.
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[EINVAL] The socket is already bound to an address.
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[EINVAL] The family of the socket and that requested in
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[EINVAL] The family of the socket and that requested in
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name->sa_family are not equivalent.
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name->sa_family are not equivalent.
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[EACCES] The requested address is protected, and the current
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[EACCES] The requested address is protected, and the current
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user has inadequate permission to access it.
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user has inadequate permission to access it.
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[EFAULT] The name parameter is not in a valid part of the user
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[EFAULT] The name parameter is not in a valid part of the user
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address space.
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address space.
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The following errors are specific to binding names in the UNIX domain.
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The following errors are specific to binding names in the UNIX domain.
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[ENOTDIR] A component of the path prefix is not a directory.
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[ENOTDIR] A component of the path prefix is not a directory.
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[ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} charac-
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[ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} charac-
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ters, or an entire path name exceeded {PATH_MAX} char-
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ters, or an entire path name exceeded {PATH_MAX} char-
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acters.
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acters.
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[ENOENT] A prefix component of the path name does not exist.
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[ENOENT] A prefix component of the path name does not exist.
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[ELOOP] Too many symbolic links were encountered in translat-
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[ELOOP] Too many symbolic links were encountered in translat-
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ing the pathname.
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ing the pathname.
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[EIO] An I/O error occurred while making the directory entry
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[EIO] An I/O error occurred while making the directory entry
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or allocating the inode.
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or allocating the inode.
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[EROFS] The name would reside on a read-only file system.
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[EROFS] The name would reside on a read-only file system.
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[EISDIR] An empty pathname was specified.
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[EISDIR] An empty pathname was specified.
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SEE ALSO
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SEE ALSO
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connect(2), getsockname(2), listen(2), socket(2)
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connect(2), getsockname(2), listen(2), socket(2)
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HISTORY
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HISTORY
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The bind() function call appeared in 4.2BSD.
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The bind() function call appeared in 4.2BSD.
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BSD February 15, 1999 BSD
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BSD February 15, 1999 BSD
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