SHUTDOWN Section: Linux Programmer's Manual (2) Updated: 24 July 2025 Index   NAME shutdown - shut down part of a full-duplex connection   SYNOPSIS #include <sys/socket.h> int shutdown(int s, int how);   DESCRIPTION The shutdown call causes all or part of a full-duplex connection on the socket associated with s to be shut down. If how is 0, further receives will be disallowed. If how is 1, further sends will be disallowed. If how is 2, further sends and receives will be disallowed.   RETURN VALUE On success, zero is returned. On error, -1 is returned, and errno is set appropriately.   ERRORS EBADF s is not a valid descriptor. ENOTSOCK s is a file, not a socket. ENOTCONN The specified socket is not connected.   CONFORMING TO 4.4BSD (the shutdown function call first appeared in 4.2BSD).   BUGS The numerical how flags should be replaced by the Single Unix-mandated SHUT_RD, SHUT_WR, and SHUT_RDWR flags.   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO BUGS SEE ALSO This document was created by using the manual pages. Time: 11:56:07 GMT, March 24, 2025