diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/internal_statvfs.c')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/internal_statvfs.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/internal_statvfs.c b/REORG.TODO/sysdeps/unix/sysv/linux/internal_statvfs.c new file mode 100644 index 0000000000..9a17ca5c17 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/internal_statvfs.c @@ -0,0 +1,87 @@ +/* Copyright (C) 1998-2017 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, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <errno.h> +#include <mntent.h> +#include <paths.h> +#include <stdbool.h> +#include <stdio_ext.h> +#include <string.h> +#include <sys/mount.h> +#include <sys/stat.h> +#include <sys/statfs.h> +#include <sys/statvfs.h> +#include "linux_fsinfo.h" +#include <kernel-features.h> + + +/* Special internal-only bit value. */ +#define ST_VALID 0x0020 + + +#ifndef STATFS +# define STATFS statfs +# define STATVFS statvfs +# define INTERNAL_STATVFS __internal_statvfs +#else +extern int __statvfs_getflags (const char *name, int fstype, int fd); +#endif + + +void +INTERNAL_STATVFS (const char *name, struct STATVFS *buf, + struct STATFS *fsbuf, int fd) +{ + /* Now fill in the fields we have information for. */ + buf->f_bsize = fsbuf->f_bsize; + /* Linux has the f_frsize size only in later version of the kernel. + If the value is not filled in use f_bsize. */ + buf->f_frsize = fsbuf->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)) + /* The shifting uses 'unsigned long long int' even though the target + field might only have 32 bits. This is OK since the 'if' branch + is not used in this case but the compiler would still generate + warnings. */ + buf->f_fsid = ((fsbuf->f_fsid.__val[0] + & ((1ULL << (8 * sizeof (fsbuf->f_fsid.__val[0]))) - 1)) + | ((unsigned long 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', sizeof (buf->__f_spare)); + + /* 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; + + buf->f_flag = fsbuf->f_flags ^ ST_VALID; +} |