--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ functions to calculate the free disk space
+ Copyright (C) Andrew Tridgell 1998-2000
+
+ 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 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
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+
+/* Return the number of TOSIZE-byte blocks used by
+ BLOCKS FROMSIZE-byte blocks, rounding away from zero.
+*/
+static SMB_BIG_UINT adjust_blocks(SMB_BIG_UINT blocks, SMB_BIG_UINT fromsize, SMB_BIG_UINT tosize)
+{
+ if (fromsize == tosize) { /* e.g., from 512 to 512 */
+ return blocks;
+ } else if (fromsize > tosize) { /* e.g., from 2048 to 512 */
+ return blocks * (fromsize / tosize);
+ } else { /* e.g., from 256 to 512 */
+ /* Protect against broken filesystems... */
+ if (fromsize == 0) {
+ fromsize = tosize;
+ }
+ return (blocks + 1) / (tosize / fromsize);
+ }
+}
+
+/* this does all of the system specific guff to get the free disk space.
+ It is derived from code in the GNU fileutils package, but has been
+ considerably mangled for use here
+
+ results are returned in *dfree and *dsize, in 512 byte units
+*/
+int sys_fsusage(const char *path, SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize)
+{
+#ifdef STAT_STATFS3_OSF1
+#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_fsize, (SMB_BIG_UINT)512)
+ struct statfs fsd;
+
+ if (statfs (path, &fsd, sizeof (struct statfs)) != 0)
+ return -1;
+#endif /* STAT_STATFS3_OSF1 */
+
+#ifdef STAT_STATFS2_FS_DATA /* Ultrix */
+#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)1024, (SMB_BIG_UINT)512)
+ struct fs_data fsd;
+
+ if (statfs (path, &fsd) != 1)
+ return -1;
+
+ (*dsize) = CONVERT_BLOCKS (fsd.fd_req.btot);
+ (*dfree) = CONVERT_BLOCKS (fsd.fd_req.bfreen);
+#endif /* STAT_STATFS2_FS_DATA */
+
+#ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */
+#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_bsize, (SMB_BIG_UINT)512)
+ struct statfs fsd;
+
+ if (statfs (path, &fsd) < 0)
+ return -1;
+
+#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 == 0x1fffff && 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 */
+#endif /* STAT_STATFS2_BSIZE */
+
+
+#ifdef STAT_STATFS2_FSIZE /* 4.4BSD */
+#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_fsize, (SMB_BIG_UINT)512)
+
+ struct statfs fsd;
+
+ if (statfs (path, &fsd) < 0)
+ return -1;
+#endif /* STAT_STATFS2_FSIZE */
+
+#ifdef STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */
+# if _AIX || defined(_CRAY)
+# define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_bsize, (SMB_BIG_UINT)512)
+# ifdef _CRAY
+# define f_bavail f_bfree
+# endif
+# else
+# define CONVERT_BLOCKS(B) ((SMB_BIG_UINT)B)
+# ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx */
+# ifndef DOLPHIN /* DOLPHIN 3.8.alfa/7.18 has f_bavail */
+# define f_bavail f_bfree
+# endif
+# endif
+# endif
+
+ struct statfs fsd;
+
+ if (statfs (path, &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. */
+
+#endif /* STAT_STATFS4 */
+
+#if defined(STAT_STATVFS) || defined(STAT_STATVFS64) /* SVR4 */
+# define CONVERT_BLOCKS(B) \
+ adjust_blocks ((SMB_BIG_UINT)(B), fsd.f_frsize ? (SMB_BIG_UINT)fsd.f_frsize : (SMB_BIG_UINT)fsd.f_bsize, (SMB_BIG_UINT)512)
+
+#ifdef STAT_STATVFS64
+ struct statvfs64 fsd;
+ if (statvfs64(path, &fsd) < 0) return -1;
+#else
+ struct statvfs fsd;
+ if (statvfs(path, &fsd) < 0) return -1;
+#endif
+
+ /* f_frsize isn't guaranteed to be supported. */
+
+#endif /* STAT_STATVFS */
+
+#ifndef CONVERT_BLOCKS
+ /* we don't have any dfree code! */
+ return -1;
+#else
+#if !defined(STAT_STATFS2_FS_DATA)
+ /* !Ultrix */
+ (*dsize) = CONVERT_BLOCKS (fsd.f_blocks);
+ (*dfree) = CONVERT_BLOCKS (fsd.f_bavail);
+#endif /* not STAT_STATFS2_FS_DATA */
+#endif
+
+ return 0;
+}
projects / samba / blobdiff