diff options
Diffstat (limited to 'libc/misc/statfs/internal_statvfs.c')
| -rw-r--r-- | libc/misc/statfs/internal_statvfs.c | 109 |
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); + } |