Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 227 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/posix/pathconf.c b/REORG.TODO/sysdeps/posix/pathconf.c
new file mode 100644
index 0000000000..46cc35629e
--- /dev/null
+++ b/REORG.TODO/sysdeps/posix/pathconf.c
@@ -0,0 +1,227 @@
+/* Copyright (C) 1991-2017 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/statfs.h>
+#include <sys/statvfs.h>
+
+
+/* Get file-specific information about PATH.  */
+long int
+__pathconf (const char *path, int name)
+{
+  if (path[0] == '\0')
+    {
+      __set_errno (ENOENT);
+      return -1;
+    }
+
+  switch (name)
+    {
+    default:
+      __set_errno (EINVAL);
+      return -1;
+
+    case _PC_LINK_MAX:
+#ifdef	LINK_MAX
+      return LINK_MAX;
+#else
+      return -1;
+#endif
+
+    case _PC_MAX_CANON:
+#ifdef	MAX_CANON
+      return MAX_CANON;
+#else
+      return -1;
+#endif
+
+    case _PC_MAX_INPUT:
+#ifdef	MAX_INPUT
+      return MAX_INPUT;
+#else
+      return -1;
+#endif
+
+    case _PC_NAME_MAX:
+#ifdef	NAME_MAX
+      {
+	struct statvfs64 sv;
+	int save_errno = errno;
+
+	if (__statvfs64 (path, &sv) < 0)
+	  {
+	    if (errno == ENOSYS)
+	      {
+		errno = save_errno;
+		return NAME_MAX;
+	      }
+	    return -1;
+	  }
+	else
+	  {
+	    return sv.f_namemax;
+	  }
+      }
+#else
+      return -1;
+#endif
+
+    case _PC_PATH_MAX:
+#ifdef	PATH_MAX
+      return PATH_MAX;
+#else
+      return -1;
+#endif
+
+    case _PC_PIPE_BUF:
+#ifdef	PIPE_BUF
+      return PIPE_BUF;
+#else
+      return -1;
+#endif
+
+    case _PC_CHOWN_RESTRICTED:
+#ifdef	_POSIX_CHOWN_RESTRICTED
+      return _POSIX_CHOWN_RESTRICTED;
+#else
+      return -1;
+#endif
+
+    case _PC_NO_TRUNC:
+#ifdef	_POSIX_NO_TRUNC
+      return _POSIX_NO_TRUNC;
+#else
+      return -1;
+#endif
+
+    case _PC_VDISABLE:
+#ifdef	_POSIX_VDISABLE
+      return _POSIX_VDISABLE;
+#else
+      return -1;
+#endif
+
+    case _PC_SYNC_IO:
+#ifdef	_POSIX_SYNC_IO
+      return _POSIX_SYNC_IO;
+#else
+      return -1;
+#endif
+
+    case _PC_ASYNC_IO:
+#ifdef	_POSIX_ASYNC_IO
+      {
+	/* AIO is only allowed on regular files and block devices.  */
+	struct stat64 st;
+
+	if (__xstat64 (_STAT_VER, path, &st) < 0
+	    || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode)))
+	  return -1;
+	else
+	  return 1;
+      }
+#else
+      return -1;
+#endif
+
+    case _PC_PRIO_IO:
+#ifdef	_POSIX_PRIO_IO
+      return _POSIX_PRIO_IO;
+#else
+      return -1;
+#endif
+
+    case _PC_SOCK_MAXBUF:
+#ifdef	SOCK_MAXBUF
+      return SOCK_MAXBUF;
+#else
+      return -1;
+#endif
+
+    case _PC_FILESIZEBITS:
+#ifdef FILESIZEBITS
+      return FILESIZEBITS;
+#else
+      /* We let platforms with larger file sizes overwrite this value.  */
+      return 32;
+#endif
+
+    case _PC_REC_INCR_XFER_SIZE:
+      /* XXX It is not entirely clear what the limit is supposed to do.
+	 What is incremented?  */
+      return -1;
+
+    case _PC_REC_MAX_XFER_SIZE:
+      /* XXX It is not entirely clear what the limit is supposed to do.
+	 In general there is no top limit of the number of bytes which
+	 case be transported at once.  */
+      return -1;
+
+    case _PC_REC_MIN_XFER_SIZE:
+      {
+	/* XXX It is not entirely clear what the limit is supposed to do.
+	   I assume this is the block size of the filesystem.  */
+	struct statvfs64 sv;
+
+	if (__statvfs64 (path, &sv) < 0)
+	  return -1;
+	return sv.f_bsize;
+      }
+
+    case _PC_REC_XFER_ALIGN:
+      {
+	/* XXX It is not entirely clear what the limit is supposed to do.
+	   I assume that the number should reflect the minimal block
+	   alignment.  */
+	struct statvfs64 sv;
+
+	if (__statvfs64 (path, &sv) < 0)
+	  return -1;
+	return sv.f_frsize;
+      }
+
+    case _PC_ALLOC_SIZE_MIN:
+      {
+	/* XXX It is not entirely clear what the limit is supposed to do.
+	   I assume that the number should reflect the minimal block
+	   alignment.  */
+	struct statvfs64 sv;
+
+	if (__statvfs64 (path, &sv) < 0)
+	  return -1;
+	return sv.f_frsize;
+      }
+
+    case _PC_SYMLINK_MAX:
+      /* In general there are no limits.  If a system has one it should
+	 overwrite this case.  */
+      return -1;
+
+    case _PC_2_SYMLINKS:
+      /* Unix systems generally have symlinks.  */
+      return 1;
+    }
+}
+
+#undef __pathconf
+weak_alias (__pathconf, pathconf)