Support statvfs and statfs. Added getmntent_r (and made it use

strtok_r instead of strtok), taught getmntent to use getmntent_r.
 -Erik

1 files changed, 109 insertions, 0 deletions

diff --git a/libc/misc/statfs/internal_statvfs.c b/libc/misc/statfs/internal_statvfs.c
new file mode 100644
index 000000000..aa7af44f5
--- /dev/null
+++ b/libc/misc/statfs/internal_statvfs.c
@@ -0,0 +1,109 @@
+/* Copyright (C) 1998, 1999, 2000, 2001 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 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, 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;
+  if (sizeof (buf->f_fsid) == sizeof (fsbuf.f_fsid))
+    buf->f_fsid = (fsbuf.f_fsid.__val[0]
+		   | ((unsigned long int) fsbuf.f_fsid.__val[1]
+		      << (8 * (sizeof (buf->f_fsid)
+			       - sizeof (fsbuf.f_fsid.__val[0])))));
+  else
+    /* We cannot help here.  The statvfs element is not large enough to
+       contain both words of the statfs f_fsid field.  */
+    buf->f_fsid = fsbuf.f_fsid.__val[0];
+#ifdef _STATVFSBUF_F_UNUSED
+  buf->__f_unused = 0;
+#endif
+  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 (STAT (&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);
+    }