Imported Upstream version 3.2.0

[debian/amanda] / gnulib / fsusage.c

diff --git a/gnulib/fsusage.c b/gnulib/fsusage.c
index ade4195e33ac26ab2c269a1bb367bce43e3e7a22..17102aad2e4cd318c9eba4328a161341f1de3427 100644 (file)
--- a/gnulib/fsusage.c
+++ b/gnulib/fsusage.c
@@ -1,7 +1,7 @@
 /* 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, 2009-2010 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
@@ -23,7 +23,7 @@
 #include <limits.h>
 #include <sys/types.h>
 
-#if STAT_STATVFS               /* POSIX 1003.1-2001 (and later) with XSI */
+#if STAT_STATVFS                /* POSIX 1003.1-2001 (and later) with XSI */
 # include <sys/statvfs.h>
 #else
 /* Don't include backward-compatibility files unless they're needed.
@@ -40,16 +40,16 @@
 # if HAVE_SYS_VFS_H
 #  include <sys/vfs.h>
 # endif
-# if HAVE_SYS_FS_S5PARAM_H     /* Fujitsu UXP/V */
+# 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"
@@ -67,13 +67,13 @@
 #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.
@@ -94,8 +94,7 @@
 int
 get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
 {
-  (void) disk;  /* avoid argument-unused warning */
-#if defined STAT_STATVFS               /* POSIX */
+#if defined STAT_STATVFS                /* POSIX, except glibc/Linux */
 
   struct statvfs fsd;
 
@@ -104,10 +103,10 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
 
   /* 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 +121,7 @@ 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 +152,11 @@ 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 +165,9 @@ 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_BSIZE        /* glibc/Linux, 4.3BSD, SunOS 4, \
+                                           MacOS X < 10.4, FreeBSD < 5.0, \
+                                           NetBSD < 3.0, OpenBSD < 4.4 */
 
   struct statfs fsd;
 
@@ -190,7 +191,7 @@ 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 +200,8 @@ 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
@@ -233,6 +235,7 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
 
 #endif
 
+  (void) disk;  /* avoid argument-unused warning */
   return 0;
 }