/* fsusage.c -- return space usage of mounted file systems
- Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2013 Free Software
+ Foundation, Inc.
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
#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.
# 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_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
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
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. */
: (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;
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;
}
# 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;
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
#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);
projects / gnulib.git / blobdiff