diff options
Diffstat (limited to 'cross/lib/fsusage.c')
| -rw-r--r-- | cross/lib/fsusage.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/cross/lib/fsusage.c b/cross/lib/fsusage.c deleted file mode 100644 index f6f4b1c35fd..00000000000 --- a/cross/lib/fsusage.c +++ /dev/null @@ -1,233 +0,0 @@ -/* fsusage.c -- return space usage of mounted file systems - - Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2023 Free Software - Foundation, Inc. - - This file 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 3 of the - License, or (at your option) any later version. - - This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */ - -#include <config.h> - -#include "fsusage.h" - -#include <limits.h> -#include <sys/types.h> - -#if STAT_STATVFS || STAT_STATVFS64 /* POSIX 1003.1-2001 (and later) with XSI */ -# include <sys/statvfs.h> -#else -/* Don't include backward-compatibility files unless they're needed. - Eventually we'd like to remove all this cruft. */ -# include <fcntl.h> -# include <unistd.h> -# include <sys/stat.h> -#if HAVE_SYS_PARAM_H -# include <sys/param.h> -#endif -#if HAVE_SYS_MOUNT_H -# include <sys/mount.h> -#endif -#if HAVE_SYS_VFS_H -# include <sys/vfs.h> -#endif -# if HAVE_SYS_FS_S5PARAM_H /* Fujitsu UXP/V */ -# include <sys/fs/s5param.h> -# endif -# if HAVE_SYS_STATFS_H -# include <sys/statfs.h> -# endif -#endif - -/* Many space usage primitives use all 1 bits to denote a value that is - not applicable or unknown. Propagate this information by returning - a uintmax_t value that is all 1 bits if X is all 1 bits, even if X - is unsigned and narrower than uintmax_t. */ -#define PROPAGATE_ALL_ONES(x) \ - ((sizeof (x) < sizeof (uintmax_t) \ - && (~ (x) == (sizeof (x) < sizeof (int) \ - ? - (1 << (sizeof (x) * CHAR_BIT)) \ - : 0))) \ - ? UINTMAX_MAX : (uintmax_t) (x)) - -/* Extract the top bit of X as an uintmax_t value. */ -#define EXTRACT_TOP_BIT(x) ((x) \ - & ((uintmax_t) 1 << (sizeof (x) * CHAR_BIT - 1))) - -/* If a value is negative, many space usage primitives store it into an - integer variable by assignment, even if the variable's type is unsigned. - So, if a space usage variable X's top bit is set, convert X to the - uintmax_t value V such that (- (uintmax_t) V) is the negative of - the original value. If X's top bit is clear, just yield X. - Use PROPAGATE_TOP_BIT if the original value might be negative; - otherwise, use PROPAGATE_ALL_ONES. */ -#define PROPAGATE_TOP_BIT(x) ((x) | ~ (EXTRACT_TOP_BIT (x) - 1)) - -#ifdef STAT_STATVFS -/* Return true if statvfs works. This is false for statvfs on systems - with GNU libc on Linux kernels before 2.6.36, which stats all - preceding entries in /proc/mounts; that makes df hang if even one - of the corresponding file systems is hard-mounted but not available. */ -# if ! (__linux__ && (__GLIBC__ || __UCLIBC__)) -/* The FRSIZE fallback is not required in this case. */ -# undef STAT_STATFS2_FRSIZE -static int statvfs_works (void) { return 1; } -# else -# include <string.h> /* for strverscmp */ -# include <sys/utsname.h> -# include <sys/statfs.h> -# define STAT_STATFS2_BSIZE 1 - -static int -statvfs_works (void) -{ - static int statvfs_works_cache = -1; - struct utsname name; - if (statvfs_works_cache < 0) - statvfs_works_cache = (uname (&name) == 0 - && 0 <= strverscmp (name.release, "2.6.36")); - return statvfs_works_cache; -} -# endif -#endif - - -/* Fill in the fields of FSP with information about space usage for - the file system on which FILE resides. - DISK is the device on which FILE is mounted, for space-getting - methods that need to know it. - Return 0 if successful, -1 if not. When returning -1, ensure that - ERRNO is either a system error value, or zero if DISK is NULL - on a system that requires a non-NULL value. */ -int -get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) -{ -#ifdef STAT_STATVFS /* POSIX, except pre-2.6.36 glibc/Linux */ - - if (statvfs_works ()) - { - struct statvfs vfsd; - - if (statvfs (file, &vfsd) < 0) - return -1; - - /* f_frsize isn't guaranteed to be supported. */ - fsp->fsu_blocksize = (vfsd.f_frsize - ? PROPAGATE_ALL_ONES (vfsd.f_frsize) - : PROPAGATE_ALL_ONES (vfsd.f_bsize)); - - fsp->fsu_blocks = PROPAGATE_ALL_ONES (vfsd.f_blocks); - fsp->fsu_bfree = PROPAGATE_ALL_ONES (vfsd.f_bfree); - fsp->fsu_bavail = PROPAGATE_TOP_BIT (vfsd.f_bavail); - fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (vfsd.f_bavail) != 0; - fsp->fsu_files = PROPAGATE_ALL_ONES (vfsd.f_files); - fsp->fsu_ffree = PROPAGATE_ALL_ONES (vfsd.f_ffree); - return 0; - } - -#endif - -#if defined STAT_STATVFS64 /* AIX */ - - struct statvfs64 fsd; - - if (statvfs64 (file, &fsd) < 0) - return -1; - - /* f_frsize isn't guaranteed to be supported. */ - fsp->fsu_blocksize = (fsd.f_frsize - ? PROPAGATE_ALL_ONES (fsd.f_frsize) - : PROPAGATE_ALL_ONES (fsd.f_bsize)); - -#elif defined STAT_STATFS3_OSF1 /* OSF/1 */ - - struct statfs fsd; - - if (statfs (file, &fsd, sizeof (struct statfs)) != 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); - -#elif defined STAT_STATFS2_FRSIZE /* 2.6 < glibc/Linux < 2.6.36 */ - - struct statfs fsd; - - if (statfs (file, &fsd) < 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_frsize); - -#elif defined STAT_STATFS2_BSIZE /* glibc/Linux < 2.6, 4.3BSD, SunOS 4, \ - Mac OS X < 10.4, FreeBSD < 5.0, \ - NetBSD < 3.0, OpenBSD < 4.4 */ - - struct statfs fsd; - - if (statfs (file, &fsd) < 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize); - -# ifdef STATFS_TRUNCATES_BLOCK_COUNTS - - /* In SunOS 4.1.2, 4.1.3, and 4.1.3_U1, the block counts in the - struct statfs are truncated to 2GB. These conditions detect that - truncation, presumably without botching the 4.1.1 case, in which - the values are not truncated. The correct counts are stored in - undocumented spare fields. */ - if (fsd.f_blocks == 0x7fffffff / fsd.f_bsize && fsd.f_spare[0] > 0) - { - fsd.f_blocks = fsd.f_spare[0]; - fsd.f_bfree = fsd.f_spare[1]; - fsd.f_bavail = fsd.f_spare[2]; - } -# endif /* STATFS_TRUNCATES_BLOCK_COUNTS */ - -#elif defined STAT_STATFS2_FSIZE /* 4.4BSD and older NetBSD */ - - struct statfs fsd; - - if (statfs (file, &fsd) < 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); - -#elif defined STAT_STATFS4 /* SVR3, old Irix */ - - struct statfs fsd; - - if (statfs (file, &fsd, sizeof fsd, 0) < 0) - return -1; - - /* Empirically, the block counts on most SVR3 and SVR3-derived - systems seem to always be in terms of 512-byte blocks, - no matter what value f_bsize has. */ - fsp->fsu_blocksize = 512; - -#endif - -#if (defined STAT_STATVFS64 || defined STAT_STATFS3_OSF1 \ - || defined STAT_STATFS2_FRSIZE || defined STAT_STATFS2_BSIZE \ - || defined STAT_STATFS2_FSIZE || defined STAT_STATFS4) - - fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.f_blocks); - fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.f_bfree); - fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.f_bavail); - fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.f_bavail) != 0; - fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.f_files); - fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.f_ffree); - -#endif - - (void) disk; /* avoid argument-unused warning */ - return 0; -} |