Actual implementation of statvfs and fstatvfs.

diff --git a/sysdeps/unix/sysv/linux/internal_statvfs.c b/sysdeps/unix/sysv/linux/internal_statvfs.c
new file mode 100644 (file)
index 0000000..24765dc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/internal_statvfs.c
@@ -0,0 +1,98 @@
+/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   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.  */
+
+  /* Now fill in the fields we have information for.  */
+  buf->f_bsize = fsbuf.f_bsize;
+  /* Linux does not support f_frsize, so set it to the full block size.  */
+  buf->f_frsize = fsbuf.f_bsize;
+  buf->f_blocks = fsbuf.f_blocks;
+  buf->f_bfree = fsbuf.f_bfree;
+  buf->f_bavail = fsbuf.f_bavail;
+  buf->f_files = fsbuf.f_files;
+  buf->f_ffree = fsbuf.f_ffree;
+  buf->f_fsid = fsbuf.f_fsid;
+  buf->f_namemax = fsbuf.f_namelen;
+  memset (buf->f_spare, '\0', 6 * sizeof (int));
+
+  /* What remains to do is to fill the fields f_favail and f_flag.  */
+
+  /* XXX I have no idea how to compute f_favail.  Any idea???  */
+  buf->f_favail = buf->f_ffree;
+
+  /* Determining the flags is tricky.  We have to read /proc/mounts or
+     the /etc/mtab file and search for the entry which matches the given
+     file.  The way we can test for matching filesystem is using the
+     device number.  */
+  buf->f_flag = 0;
+  if (fstat (fd, &st) >= 0)
+    {
+      int save_errno = errno;
+      struct mntent mntbuf;
+      FILE *mtab;
+
+      mtab = __setmntent ("/proc/mounts", "r");
+      if (mtab == NULL)
+       mtab = __setmntent (_PATH_MOUNTED, "r");
+
+      if (mtab != NULL)
+       {
+         char tmpbuf[1024];
+
+         while (__getmntent_r (mtab, &mntbuf, tmpbuf, sizeof (tmpbuf)))
+           {
+             struct stat fsst;
+
+             /* Find out about the device the current entry is for.  */
+             if (stat (mntbuf.mnt_dir, &fsst) >= 0
+                 && st.st_dev == fsst.st_dev)
+               {
+                 /* Bingo, we found the entry for the device FD is on.
+                    Now interpret the option string.  */
+                 char *cp = mntbuf.mnt_opts;
+                 char *opt;
+
+                 while ((opt = strsep (&cp, ",")) != NULL)
+                   if (strcmp (opt, "ro") == 0)
+                     buf->f_flag |= ST_RDONLY;
+                   else if (strcmp (opt, "nosuid") == 0)
+                     buf->f_flag |= ST_NOSUID;
+                   else if (strcmp (opt, "noexec") == 0)
+                     buf->f_flag |= ST_NOEXEC;
+                   else if (strcmp (opt, "nodev") == 0)
+                     buf->f_flag |= ST_NODEV;
+                   else if (strcmp (opt, "sync") == 0)
+                     buf->f_flag |= ST_SYNCHRONOUS;
+                   else if (strcmp (opt, "mand") == 0)
+                     buf->f_flag |= ST_MANDLOCK;
+                   else if (strcmp (opt, "noatime") == 0)
+                     buf->f_flag |= ST_NOATIME;
+                   else if (strcmp (opt, "nodiratime") == 0)
+                     buf->f_flag |= ST_NODIRATIME;
+
+                 /* We can stop looking for more entries.  */
+                 break;
+               }
+           }
+
+         /* Close the file.  */
+         __endmntent (mtab);
+       }
+
+      __set_errno (save_errno);
+    }