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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [internal_statvfs.c] - Rev 829
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/* 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 stat64 fsst; /* Find out about the device the current entry is for. */ if (stat64 (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); } errno = (save_errno); }