| 1 | /* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | /* Now fill in the fields we have information for. */ |
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| 21 | buf->f_bsize = fsbuf.f_bsize; |
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| 22 | /* Linux does not support f_frsize, so set it to the full block size. */ |
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| 23 | buf->f_frsize = fsbuf.f_bsize; |
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| 24 | buf->f_blocks = fsbuf.f_blocks; |
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| 25 | buf->f_bfree = fsbuf.f_bfree; |
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| 26 | buf->f_bavail = fsbuf.f_bavail; |
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| 27 | buf->f_files = fsbuf.f_files; |
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| 28 | buf->f_ffree = fsbuf.f_ffree; |
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| 29 | if (sizeof (buf->f_fsid) == sizeof (fsbuf.f_fsid)) |
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| 30 | buf->f_fsid = (fsbuf.f_fsid.__val[0] |
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| 31 | | ((unsigned long int) fsbuf.f_fsid.__val[1] |
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| 32 | << (8 * (sizeof (buf->f_fsid) |
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| 33 | - sizeof (fsbuf.f_fsid.__val[0]))))); |
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| 34 | else |
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| 35 | /* We cannot help here. The statvfs element is not large enough to |
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| 36 | contain both words of the statfs f_fsid field. */ |
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| 37 | buf->f_fsid = fsbuf.f_fsid.__val[0]; |
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| 38 | #ifdef _STATVFSBUF_F_UNUSED |
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| 39 | buf->__f_unused = 0; |
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| 40 | #endif |
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| 41 | buf->f_namemax = fsbuf.f_namelen; |
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| 42 | memset (buf->__f_spare, '\0', 6 * sizeof (int)); |
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| 43 | |
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| 44 | /* What remains to do is to fill the fields f_favail and f_flag. */ |
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| 45 | |
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| 46 | /* XXX I have no idea how to compute f_favail. Any idea??? */ |
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| 47 | buf->f_favail = buf->f_ffree; |
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| 48 | |
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| 49 | /* Determining the flags is tricky. We have to read /proc/mounts or |
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| 50 | the /etc/mtab file and search for the entry which matches the given |
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| 51 | file. The way we can test for matching filesystem is using the |
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| 52 | device number. */ |
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| 53 | buf->f_flag = 0; |
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| 54 | if (STAT (&st) >= 0) |
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| 55 | { |
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| 56 | int save_errno = errno; |
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| 57 | struct mntent mntbuf; |
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| 58 | FILE *mtab; |
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| 59 | |
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| 60 | mtab = __setmntent ("/proc/mounts", "r"); |
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| 61 | if (mtab == NULL) |
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| 62 | mtab = __setmntent (_PATH_MOUNTED, "r"); |
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| 63 | |
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| 64 | if (mtab != NULL) |
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| 65 | { |
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| 66 | char tmpbuf[1024]; |
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| 67 | |
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| 68 | while (__getmntent_r (mtab, &mntbuf, tmpbuf, sizeof (tmpbuf))) |
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| 69 | { |
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| 70 | struct stat64 fsst; |
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| 71 | |
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| 72 | /* Find out about the device the current entry is for. */ |
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| 73 | if (stat64 (mntbuf.mnt_dir, &fsst) >= 0 |
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| 74 | && st.st_dev == fsst.st_dev) |
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| 75 | { |
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| 76 | /* Bingo, we found the entry for the device FD is on. |
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| 77 | Now interpret the option string. */ |
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| 78 | char *cp = mntbuf.mnt_opts; |
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| 79 | char *opt; |
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| 80 | |
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| 81 | while ((opt = strsep (&cp, ",")) != NULL) |
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| 82 | if (strcmp (opt, "ro") == 0) |
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| 83 | buf->f_flag |= ST_RDONLY; |
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| 84 | else if (strcmp (opt, "nosuid") == 0) |
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| 85 | buf->f_flag |= ST_NOSUID; |
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| 86 | else if (strcmp (opt, "noexec") == 0) |
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| 87 | buf->f_flag |= ST_NOEXEC; |
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| 88 | else if (strcmp (opt, "nodev") == 0) |
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| 89 | buf->f_flag |= ST_NODEV; |
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| 90 | else if (strcmp (opt, "sync") == 0) |
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| 91 | buf->f_flag |= ST_SYNCHRONOUS; |
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| 92 | else if (strcmp (opt, "mand") == 0) |
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| 93 | buf->f_flag |= ST_MANDLOCK; |
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| 94 | else if (strcmp (opt, "noatime") == 0) |
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| 95 | buf->f_flag |= ST_NOATIME; |
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| 96 | else if (strcmp (opt, "nodiratime") == 0) |
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| 97 | buf->f_flag |= ST_NODIRATIME; |
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| 98 | |
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| 99 | /* We can stop looking for more entries. */ |
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| 100 | break; |
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| 101 | } |
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| 102 | } |
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| 103 | |
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| 104 | /* Close the file. */ |
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| 105 | __endmntent (mtab); |
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| 106 | } |
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| 107 | |
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| 108 | errno = (save_errno); |
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| 109 | } |
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