diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/fstatvfs.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/fstatvfs.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/fstatvfs.c b/sysdeps/unix/sysv/linux/fstatvfs.c new file mode 100644 index 0000000000..53edb6be3a --- /dev/null +++ b/sysdeps/unix/sysv/linux/fstatvfs.c @@ -0,0 +1,173 @@ +/* Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <mntent.h> +#include <paths.h> +#include <string.h> +#include <sys/mount.h> +#include <sys/stat.h> +#include <sys/statfs.h> +#include <sys/statvfs.h> + +/* These definitions come from the kernel headers. But we cannot + include the headers here because of type clashes. If there will + become new filesystem types available we have to add the + appropriate definitions here.*/ +#define ADFS_SUPER_MAGIC 0xadf5 +#define AFFS_SUPER_MAGIC 0xadff +#define CODA_SUPER_MAGIC 0x73757245 +#define EXT2_SUPER_MAGIC 0xef53 +#define HPFS_SUPER_MAGIC 0xf995e849 +#define ISOFS_SUPER_MAGIC 0x9660 +#define MINIX_SUPER_MAGIC 0x137f +#define MINIX_SUPER_MAGIC2 0x138F +#define MINIX2_SUPER_MAGIC 0x2468 +#define MINIX2_SUPER_MAGIC2 0x2478 +#define MSDOS_SUPER_MAGIC 0x4d44 +#define NCP_SUPER_MAGIC 0x564c +#define NFS_SUPER_MAGIC 0x6969 +#define PROC_SUPER_MAGIC 0x9fa0 +#define SMB_SUPER_MAGIC 0x517b +#define XENIX_SUPER_MAGIC 0x012ff7b4 +#define SYSV4_SUPER_MAGIC 0x012ff7b5 +#define SYSV2_SUPER_MAGIC 0x012ff7b6 +#define COH_SUPER_MAGIC 0x012ff7b7 + + +int +fstatvfs (int fd, struct statvfs *buf) +{ + struct statfs fsbuf; + struct stat st; + + /* Get as much information as possible from the system. */ + if (__fstatfs (fd, &fsbuf) < 0) + return -1; + + /* Now fill in the fields me have information for. */ + buf->f_bsize = 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; + buf->f_fsid = fsbuf.f_fsid; + buf->f_namemax = fsbuf.f_namelen; + memset (buf->f_spare, '\0', 6 * sizeof (int)); + + /* What remains to do is to fill the fields f_frsize, f_favail, + and f_flag. */ + switch (fsbuf.f_type) + { + case EXT2_SUPER_MAGIC: + /* This is not really correct since the fragment size can vary. */ + buf->f_frsize = 1024; + break; + + case ADFS_SUPER_MAGIC: + case AFFS_SUPER_MAGIC: + case CODA_SUPER_MAGIC: + case HPFS_SUPER_MAGIC: + case ISOFS_SUPER_MAGIC: + case MINIX_SUPER_MAGIC: + case MINIX_SUPER_MAGIC2: + case MINIX2_SUPER_MAGIC: + case MINIX2_SUPER_MAGIC2: + case MSDOS_SUPER_MAGIC: + case NCP_SUPER_MAGIC: + case NFS_SUPER_MAGIC: + case PROC_SUPER_MAGIC: + case SMB_SUPER_MAGIC: + case XENIX_SUPER_MAGIC: + case SYSV4_SUPER_MAGIC: + case SYSV2_SUPER_MAGIC: + case COH_SUPER_MAGIC: + default: + /* I hope it's safe to assume no fragmentation. */ + buf->f_frsize = buf->f_bsize; + break; + } + + /* 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/mount or + the /etc/matb 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 (fstat (fd, &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; + + /* We can stop looking for more entries. */ + break; + } + } + + /* Close the file. */ + __endmntent (mtab); + } + + __set_errno (save_errno); + } + + /* We signal success if the statfs call succeeded. */ + return 0; +} |