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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /lib/fsusage.c | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-70e9163c9c18e995515598085cb824e554eb7ae7.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'lib/fsusage.c')
-rw-r--r-- | lib/fsusage.c | 148 |
1 files changed, 105 insertions, 43 deletions
diff --git a/lib/fsusage.c b/lib/fsusage.c index 337bf53..a230538 100644 --- a/lib/fsusage.c +++ b/lib/fsusage.c @@ -1,12 +1,12 @@ /* fsusage.c -- return space usage of mounted file systems - Copyright (C) 1991, 1992, 1996, 1998, 1999, 2002, 2003, 2004, 2005, 2006 - Free Software Foundation, Inc. + Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2016 Free Software + Foundation, Inc. - This program is free software; you can redistribute it and/or modify + This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -14,8 +14,7 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <config.h> @@ -24,7 +23,7 @@ #include <limits.h> #include <sys/types.h> -#if STAT_STATVFS /* POSIX 1003.1-2001 (and later) with XSI */ +#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. @@ -32,35 +31,30 @@ # 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 */ +#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 defined HAVE_SYS_FILSYS_H && !defined _CRAY -# include <sys/filsys.h> /* SVR2 */ +# include <sys/filsys.h> /* SVR2 */ # endif # if HAVE_SYS_STATFS_H # include <sys/statfs.h> # endif -# if HAVE_DUSTAT_H /* AIX PS/2 */ +# if HAVE_DUSTAT_H /* AIX PS/2 */ # include <sys/dustat.h> # endif # include "full-read.h" #endif -/* The results of open() in this file are not used with fchdir, - therefore save some unnecessary work in fchdir.c. */ -#undef open -#undef close - /* 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 @@ -68,13 +62,13 @@ #define PROPAGATE_ALL_ONES(x) \ ((sizeof (x) < sizeof (uintmax_t) \ && (~ (x) == (sizeof (x) < sizeof (int) \ - ? - (1 << (sizeof (x) * CHAR_BIT)) \ - : 0))) \ + ? - (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))) + & ((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. @@ -85,6 +79,35 @@ 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 @@ -95,19 +118,44 @@ int get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) { -#if defined STAT_STATVFS /* POSIX */ +#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 statvfs fsd; + struct statvfs64 fsd; - if (statvfs (file, &fsd) < 0) + 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)); + ? PROPAGATE_ALL_ONES (fsd.f_frsize) + : PROPAGATE_ALL_ONES (fsd.f_bsize)); -#elif defined STAT_STATFS2_FS_DATA /* Ultrix */ +#elif defined STAT_STATFS2_FS_DATA /* Ultrix */ struct fs_data fsd; @@ -122,7 +170,7 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.fd_req.gtot); fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.fd_req.gfree); -#elif defined STAT_READ_FILSYS /* SVR2 */ +#elif defined STAT_READ_FILSYS /* SVR2 */ # ifndef SUPERBOFF # define SUPERBOFF (SUPERB * 512) # endif @@ -153,11 +201,11 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.s_tfree); fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.s_tfree) != 0; fsp->fsu_files = (fsd.s_isize == -1 - ? UINTMAX_MAX - : (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1)); + ? UINTMAX_MAX + : (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1)); fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.s_tinode); -#elif defined STAT_STATFS3_OSF1 +#elif defined STAT_STATFS3_OSF1 /* OSF/1 */ struct statfs fsd; @@ -166,7 +214,18 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); -#elif defined STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */ +#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; @@ -190,7 +249,7 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) } # endif /* STATFS_TRUNCATES_BLOCK_COUNTS */ -#elif defined STAT_STATFS2_FSIZE /* 4.4BSD */ +#elif defined STAT_STATFS2_FSIZE /* 4.4BSD and older NetBSD */ struct statfs fsd; @@ -199,7 +258,8 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); -#elif defined STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */ +#elif defined STAT_STATFS4 /* SVR3, Dynix, old Irix, old AIX, \ + Dolphin */ # if !_AIX && !defined _SEQUENT_ && !defined DOLPHIN # define f_bavail f_bfree @@ -221,8 +281,9 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) #endif -#if (defined STAT_STATVFS \ - || (!defined STAT_STATFS2_FS_DATA && !defined STAT_READ_FILSYS)) +#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); @@ -233,6 +294,7 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) #endif + (void) disk; /* avoid argument-unused warning */ return 0; } |