| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | /* Now fill in the fields we have information for. */ |
| 21 | buf->f_bsize = fsbuf.f_bsize; |
| 22 | /* Linux does not support f_frsize, so set it to the full block size. */ |
| 23 | buf->f_frsize = fsbuf.f_bsize; |
| 24 | buf->f_blocks = fsbuf.f_blocks; |
| 25 | buf->f_bfree = fsbuf.f_bfree; |
| 26 | buf->f_bavail = fsbuf.f_bavail; |
| 27 | buf->f_files = fsbuf.f_files; |
| 28 | buf->f_ffree = fsbuf.f_ffree; |
| 29 | if (sizeof (buf->f_fsid) == sizeof (fsbuf.f_fsid)) |
| 30 | buf->f_fsid = (fsbuf.f_fsid.__val[0] |
| 31 | | ((unsigned long int) fsbuf.f_fsid.__val[1] |
| 32 | << (8 * (sizeof (buf->f_fsid) |
| 33 | - sizeof (fsbuf.f_fsid.__val[0]))))); |
| 34 | else |
| 35 | /* We cannot help here. The statvfs element is not large enough to |
| 36 | contain both words of the statfs f_fsid field. */ |
| 37 | buf->f_fsid = fsbuf.f_fsid.__val[0]; |
| 38 | #ifdef _STATVFSBUF_F_UNUSED |
| 39 | buf->__f_unused = 0; |
| 40 | #endif |
| 41 | buf->f_namemax = fsbuf.f_namelen; |
| 42 | memset (buf->__f_spare, '\0', 6 * sizeof (int)); |
| 43 | |
| 44 | /* What remains to do is to fill the fields f_favail and f_flag. */ |
| 45 | |
| 46 | /* XXX I have no idea how to compute f_favail. Any idea??? */ |
| 47 | buf->f_favail = buf->f_ffree; |
| 48 | |
| 49 | /* Determining the flags is tricky. We have to read /proc/mounts or |
| 50 | the /etc/mtab file and search for the entry which matches the given |
| 51 | file. The way we can test for matching filesystem is using the |
| 52 | device number. */ |
| 53 | buf->f_flag = 0; |
| 54 | if (STAT (&st) >= 0) |
| 55 | { |
| 56 | int save_errno = errno; |
| 57 | struct mntent mntbuf; |
| 58 | FILE *mtab; |
| 59 | |
| 60 | mtab = setmntent ("/proc/mounts", "r"); |
| 61 | if (mtab == NULL) |
| 62 | mtab = setmntent (_PATH_MOUNTED, "r"); |
| 63 | |
| 64 | if (mtab != NULL) |
| 65 | { |
| 66 | char tmpbuf[1024]; |
| 67 | |
| 68 | while (getmntent_r (mtab, &mntbuf, tmpbuf, sizeof (tmpbuf))) |
| 69 | { |
| 70 | struct stat fsst; |
| 71 | |
| 72 | /* Find out about the device the current entry is for. */ |
| 73 | if (stat (mntbuf.mnt_dir, &fsst) >= 0 |
| 74 | && st.st_dev == fsst.st_dev) |
| 75 | { |
| 76 | /* Bingo, we found the entry for the device FD is on. |
| 77 | Now interpret the option string. */ |
| 78 | char *cp = mntbuf.mnt_opts; |
| 79 | char *opt; |
| 80 | |
| 81 | while ((opt = strsep (&cp, ",")) != NULL) |
| 82 | if (strcmp (opt, "ro") == 0) |
| 83 | buf->f_flag |= ST_RDONLY; |
| 84 | else if (strcmp (opt, "nosuid") == 0) |
| 85 | buf->f_flag |= ST_NOSUID; |
| 86 | #ifdef __USE_GNU |
| 87 | else if (strcmp (opt, "noexec") == 0) |
| 88 | buf->f_flag |= ST_NOEXEC; |
| 89 | else if (strcmp (opt, "nodev") == 0) |
| 90 | buf->f_flag |= ST_NODEV; |
| 91 | else if (strcmp (opt, "sync") == 0) |
| 92 | buf->f_flag |= ST_SYNCHRONOUS; |
| 93 | else if (strcmp (opt, "mand") == 0) |
| 94 | buf->f_flag |= ST_MANDLOCK; |
| 95 | else if (strcmp (opt, "noatime") == 0) |
| 96 | buf->f_flag |= ST_NOATIME; |
| 97 | else if (strcmp (opt, "nodiratime") == 0) |
| 98 | buf->f_flag |= ST_NODIRATIME; |
| 99 | #endif |
| 100 | |
| 101 | /* We can stop looking for more entries. */ |
| 102 | break; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* Close the file. */ |
| 107 | endmntent (mtab); |
| 108 | } |
| 109 | |
| 110 | __set_errno (save_errno); |
| 111 | } |