glibc/sysdeps/unix/sysv/linux/cmsg_nxthdr.c
Ulrich Drepper dfd2464b33 Update.
* sysdeps/unix/bsd/poll.c (__poll): Add code to extend sets if any
	passed file descriptor exceeds the size determined by
	getdtablesize.

	* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Update
	from inline version in bits/socket.h.

	* sysdeps/unix/sysv/linux/bits/socket.h: Define __cmsg_nxthdr as
	inline function only is __USE_EXTERN_INLINES is defined.

	* time/strftime.c (my_strftime): Make code a bit clearer.
	Patch by Paul Eggert <eggert@twinsun.com>.

	by removing SIG_IGN handler for SIGCHLD if necessary.
1998-11-18 14:46:49 +00:00

40 lines
1.6 KiB
C

/* Return point to next ancillary data entry in message header.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sys/socket.h>
struct cmsghdr *
__cmsg_nxthdr (struct msghdr *mhdr, struct cmsghdr *cmsg)
{
if ((size_t) cmsg->cmsg_len < sizeof (struct cmsghdr))
/* The kernel header does this so there may be a reason. */
return NULL;
cmsg = (struct cmsghdr *) ((unsigned char *) cmsg
+ CMSG_ALIGN (cmsg->cmsg_len));
if ((unsigned char *) (cmsg + 1) >= ((unsigned char *) mhdr->msg_control
+ mhdr->msg_controllen)
|| ((unsigned char *) cmsg + CMSG_ALIGN (cmsg->cmsg_len)
>= ((unsigned char *) mhdr->msg_control + mhdr->msg_controllen)))
/* No more entries. */
return NULL;
return cmsg;
}