BIND(2FREEBSD) - man page online | system calls
Assign a local protocol address to a socket.
June 26, 2014
BIND(2) BSD System Calls Manual BIND(2)
NAMEbind — assign a local protocol address to a socket
LIBRARYStandard C Library (libc, -lc)
SYNOPSIS#include <sys/types.h> #include <sys/socket.h> int bind(int s, const struct sockaddr *addr, socklen_t addrlen);
DESCRIPTIONThe bind() system call assigns the local protocol address to a socket. When a socket is created with socket(2) it exists in an address family space but has no protocol address assigned. The bind() system call requests that addr be assigned to the socket.
NOTESBinding an address in the UNIX domain creates a socket in the file system that must be deleted by the caller when it is no longer needed (using unlink(2)). The rules used in address binding vary between communication domains. Consult the manual entries in section 4 for detailed information. For maximum portability, you should always zero the socket address structure before populat‐ ing it and passing it to bind().
RETURN VALUESThe bind() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
ERRORSThe bind() system call will fail if: [EAGAIN] Kernel resources to complete the request are temporarily unavailable. [EBADF] The s argument is not a valid descriptor. [EINVAL] The socket is already bound to an address, and the protocol does not sup‐ port binding to a new address; or the socket has been shut down. [EINVAL] The addrlen argument is not a valid length for the address family. [ENOTSOCK] The s argument is not a socket. [EADDRNOTAVAIL] The specified address is not available from the local machine. [EADDRINUSE] The specified address is already in use. [EAFNOSUPPORT] Addresses in the specified address family cannot be used with this socket. [EACCES] The requested address is protected, and the current user has inadequate permission to access it. [EFAULT] The addr argument is not in a valid part of the user address space. The following errors are specific to binding addresses in the UNIX domain. [ENOTDIR] A component of the path prefix is not a directory. [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. [ENOENT] A prefix component of the path name does not exist. [ELOOP] Too many symbolic links were encountered in translating the pathname. [EIO] An I/O error occurred while making the directory entry or allocating the inode. [EROFS] The name would reside on a read-only file system. [EISDIR] An empty pathname was specified.
SEE ALSOconnect(2), getsockname(2), listen(2), socket(2)
BSD June 26, 2014 BSD
HISTORYThe bind() system call appeared in 4.2BSD.
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|refer to||bind(2) | connect(2) | getsockname(2) | listen(2) | socket(2) | unlink(2)|