2 Unix SMB/Netbios implementation.
4 functions to calculate the free disk space
5 Copyright (C) Andrew Tridgell 1998
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 extern int DEBUGLEVEL;
27 /****************************************************************************
28 normalise for DOS usage
29 ****************************************************************************/
30 static void disk_norm(BOOL small_query, SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
32 /* check if the disk is beyond the max disk size */
33 SMB_BIG_UINT maxdisksize = lp_maxdisksize();
35 /* convert to blocks - and don't overflow */
36 maxdisksize = ((maxdisksize*1024)/(*bsize))*1024;
37 if (*dsize > maxdisksize) *dsize = maxdisksize;
38 if (*dfree > maxdisksize) *dfree = maxdisksize-1;
39 /* the -1 should stop applications getting div by 0
43 while (*dfree > WORDMAX || *dsize > WORDMAX || *bsize < 512) {
49 * Force max to fit in 16 bit fields.
51 if (*bsize > (WORDMAX*512)) {
52 *bsize = (WORDMAX*512);
65 /****************************************************************************
66 return number of 1K blocks available on a path and total number
67 ****************************************************************************/
69 static SMB_BIG_UINT disk_free(char *path, BOOL small_query,
70 SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
73 SMB_BIG_UINT dfree_q = 0;
74 SMB_BIG_UINT bsize_q = 0;
75 SMB_BIG_UINT dsize_q = 0;
78 (*dfree) = (*dsize) = 0;
82 * If external disk calculation specified, use it.
85 dfree_command = lp_dfree_command();
86 if (dfree_command && *dfree_command) {
91 slprintf(syscmd, sizeof(syscmd), "%s %s", dfree_command, path);
92 DEBUG (3, ("disk_free: Running command %s\n", syscmd));
94 lines = file_lines_pload(syscmd, NULL);
96 char *line = lines[0];
98 line[strlen(line)-1] = '\0';
100 DEBUG (3, ("Read input from dfree, \"%s\"\n", line));
102 *dsize = (SMB_BIG_UINT)strtoul(line, &p, 10);
103 while (p && *p & isspace(*p))
106 *dfree = (SMB_BIG_UINT)strtoul(p, &p, 10);
107 while (p && *p & isspace(*p))
110 *bsize = (SMB_BIG_UINT)strtoul(p, NULL, 10);
113 file_lines_free(lines);
114 DEBUG (3, ("Parsed output of dfree, dsize=%u, dfree=%u, bsize=%u\n",
115 (unsigned int)*dsize, (unsigned int)*dfree, (unsigned int)*bsize));
122 DEBUG (0, ("disk_free: sys_popen() failed for command %s. Error was : %s\n",
123 syscmd, strerror(errno) ));
124 sys_fsusage(path, dfree, dsize);
127 sys_fsusage(path, dfree, dsize);
129 if (disk_quotas(path, &bsize_q, &dfree_q, &dsize_q)) {
131 (*dfree) = MIN(*dfree,dfree_q);
132 (*dsize) = MIN(*dsize,dsize_q);
135 /* FIXME : Any reason for this assumption ? */
137 DEBUG(5,("disk_free:Warning: bsize == %d < 256 . Changing to assumed correct bsize = 512\n",(int)*bsize));
144 DEBUG(0,("WARNING: dfree is broken on this system\n"));
147 *dsize = 20*1024*1024/(*bsize);
148 *dfree = MAX(1,*dfree);
151 disk_norm(small_query,bsize,dfree,dsize);
153 if ((*bsize) < 1024) {
154 dfree_retval = (*dfree)/(1024/(*bsize));
156 dfree_retval = ((*bsize)/1024)*(*dfree);
159 return(dfree_retval);
163 /****************************************************************************
164 wrap it to get filenames right
165 ****************************************************************************/
166 SMB_BIG_UINT sys_disk_free(char *path, BOOL small_query,
167 SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
169 return(disk_free(dos_to_unix(path,False),small_query, bsize,dfree,dsize));