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.

3 files changed, 39 insertions, 10 deletions

diff --git a/sysdeps/unix/bsd/poll.c b/sysdeps/unix/bsd/poll.c
index 23ae6e21be..7fb4fcc3fa 100644
--- a/sysdeps/unix/bsd/poll.c
+++ b/sysdeps/unix/bsd/poll.c
@@ -62,6 +62,32 @@ __poll (fds, nfds, timeout)
   for (f = fds; f < &fds[nfds]; ++f)
     if (f->fd >= 0)
       {
+	if (f->fd >= max_fd_size)
+	  {
+	    /* The user provides a file descriptor number which is higher
+	       than the maximum we got from the `getdtablesize' call.
+	       Maybe this is ok so enlarge the arrays.  */
+	    fd_set *nrset, *nwset, *nxset;
+	    int nbytes;
+
+	    max_fd_size = roundup (f->fd, __NFDBITS);
+	    nbytes = howmany (max_fd_size, __NFDBITS);
+
+	    nrset = alloca (nbytes);
+	    nwset = alloca (nbytes);
+	    nxset = alloca (nbytes);
+
+	    __bzero ((char *) nrset + bytes, nbytes - bytes);
+	    __bzero ((char *) nwset + bytes, nbytes - bytes);
+	    __bzero ((char *) nxset + bytes, nbytes - bytes);
+
+	    rset = memcpy (nrset, rset, bytes);
+	    wset = memcpy (nwset, wset, bytes);
+	    xset = memcpy (nxset, xset, bytes);
+
+	    bytes = nbytes;
+	  }
+
 	if (f->events & POLLIN)
 	  FD_SET (f->fd, rset);
 	if (f->events & POLLOUT)
diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h
index 30ba59fc57..74b4ca2ee1 100644
--- a/sysdeps/unix/sysv/linux/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/bits/socket.h
@@ -194,11 +194,12 @@ struct cmsghdr
 			 + CMSG_ALIGN (sizeof (struct cmsghdr)))
 #define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
 
-#ifndef _EXTERN_INLINE
-# define _EXTERN_INLINE extern __inline
-#endif
 extern struct cmsghdr *__cmsg_nxthdr __P ((struct msghdr *__mhdr,
 					   struct cmsghdr *__cmsg));
+#ifdef __USE_EXTERN_INLINES
+# ifndef _EXTERN_INLINE
+#  define _EXTERN_INLINE extern __inline
+# endif
 _EXTERN_INLINE struct cmsghdr *
 __cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg) __THROW
 {
@@ -216,6 +217,7 @@ __cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg) __THROW
     return NULL;
   return __cmsg;
 }
+#endif	/* Use `extern inline'.  */
 
 /* Socket level message types.  This must match the definitions in
    <linux/socket.h>.  */
diff --git a/sysdeps/unix/sysv/linux/cmsg_nxthdr.c b/sysdeps/unix/sysv/linux/cmsg_nxthdr.c
index 2245db7f25..fda37f37aa 100644
--- a/sysdeps/unix/sysv/linux/cmsg_nxthdr.c
+++ b/sysdeps/unix/sysv/linux/cmsg_nxthdr.c
@@ -1,5 +1,5 @@
 /* Return point to next ancillary data entry in message header.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   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
@@ -23,16 +23,17 @@
 struct cmsghdr *
 __cmsg_nxthdr (struct msghdr *mhdr, struct cmsghdr *cmsg)
 {
-  unsigned char *p;
-
   if ((size_t) cmsg->cmsg_len < sizeof (struct cmsghdr))
     /* The kernel header does this so there may be a reason.  */
     return NULL;
 
-  p = (((unsigned char *) cmsg)
-       + ((cmsg->cmsg_len + sizeof (long int) - 1) & ~sizeof (long int)));
-  if (p >= (unsigned char *) mhdr->msg_control + mhdr->msg_controllen)
+  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 (struct cmsghdr *) p;
+  return cmsg;
 }