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1.1 root 1: /* fsusage.c -- return space usage of mounted filesystems
2: Copyright (C) 1991, 1992 Free Software Foundation, Inc.
3:
4: This program is free software; you can redistribute it and/or modify
5: it under the terms of the GNU General Public License as published by
6: the Free Software Foundation; either version 2, or (at your option)
7: any later version.
8:
9: This program is distributed in the hope that it will be useful,
10: but WITHOUT ANY WARRANTY; without even the implied warranty of
11: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12: GNU General Public License for more details.
13:
14: You should have received a copy of the GNU General Public License
15: along with this program; if not, write to the Free Software
16: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17:
18: This file was modified slightly by Ian Lance Taylor, December 1992,
19: for use with Taylor UUCP. */
20:
21: #include "uucp.h"
22: #include "sysdep.h"
23: #include "fsusg.h"
24:
25: int statfs ();
26:
27: #if STAT_STATFS2_BSIZE
28: #ifndef _IBMR2 /* 4.3BSD, SunOS 4, HP-UX, AIX PS/2. */
29: #include <sys/vfs.h>
30: #endif
31: #endif
32:
33: #if STAT_STATFS2_FSIZE /* 4.4BSD. */
34: #include <sys/mount.h>
35: #endif
36:
37: #if STAT_STATFS2_FS_DATA /* Ultrix. */
38: #include <sys/param.h>
39: #include <sys/mount.h>
40: #endif
41:
42: #if STAT_USTAT /* SVR2 and others. */
43: #include <ustat.h>
44: #endif
45:
46: #if STAT_STATFS4 /* SVR3, Dynix, Irix. */
47: #include <sys/statfs.h>
48: #endif
49: #ifdef _AIX
50: #ifdef _IBMR2 /* AIX RS6000. */
51: #include <sys/statfs.h>
52: #endif
53: #endif
54:
55: #ifdef _AIX
56: #ifdef _I386 /* AIX PS/2. */
57: #include <sys/stat.h>
58: #include <sys/dustat.h>
59: #endif
60: #endif
61:
62: #if STAT_STATVFS /* SVR4. */
63: #include <sys/statvfs.h>
64: int statvfs ();
65: #endif
66:
67: #define STAT_NONE 0
68:
69: #if ! STAT_STATVFS
70: #if ! STAT_STATFS2_BSIZE
71: #if ! STAT_STATFS2_FSIZE
72: #if ! STAT_STATFS2_FS_DATA
73: #if ! STAT_STATFS4
74: #if ! STAT_USTAT
75: #undef STAT_NONE
76: #define STAT_NONE 1
77: #endif
78: #endif
79: #endif
80: #endif
81: #endif
82: #endif
83:
84: #if ! STAT_NONE
85:
86: /* Return the number of TOSIZE-byte blocks used by
87: BLOCKS FROMSIZE-byte blocks, rounding up. */
88:
89: static long
90: adjust_blocks (blocks, fromsize, tosize)
91: long blocks;
92: int fromsize, tosize;
93: {
94: if (fromsize == tosize) /* E.g., from 512 to 512. */
95: return blocks;
96: else if (fromsize > tosize) /* E.g., from 2048 to 512. */
97: return blocks * (fromsize / tosize);
98: else /* E.g., from 256 to 512. */
99: return (blocks + 1) / (tosize / fromsize);
100: }
101:
102: #endif
103:
104: /* Fill in the fields of FSP with information about space usage for
105: the filesystem on which PATH resides.
106: DISK is the device on which PATH is mounted, for space-getting
107: methods that need to know it.
108: Return 0 if successful, -1 if not. */
109:
110: int
111: get_fs_usage (path, disk, fsp)
112: char *path, *disk;
113: struct fs_usage *fsp;
114: {
115: #if STAT_NONE
116: return -1;
117: #endif
118:
119: #if STAT_STATFS2_FS_DATA /* Ultrix. */
120: struct fs_data fsd;
121:
122: if (statfs (path, &fsd) != 1)
123: return -1;
124: #define convert_blocks(b) adjust_blocks ((b), 1024, 512)
125: fsp->fsu_blocks = convert_blocks (fsd.fd_req.btot);
126: fsp->fsu_bfree = convert_blocks (fsd.fd_req.bfree);
127: fsp->fsu_bavail = convert_blocks (fsd.fd_req.bfreen);
128: fsp->fsu_files = fsd.fd_req.gtot;
129: fsp->fsu_ffree = fsd.fd_req.gfree;
130: #endif
131:
132: #if STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX. */
133: struct statfs fsd;
134:
135: if (statfs (path, &fsd) < 0)
136: return -1;
137: #define convert_blocks(b) adjust_blocks ((b), fsd.f_bsize, 512)
138: #endif
139:
140: #if STAT_STATFS2_FSIZE /* 4.4BSD. */
141: struct statfs fsd;
142:
143: if (statfs (path, &fsd) < 0)
144: return -1;
145: #define convert_blocks(b) adjust_blocks ((b), fsd.f_fsize, 512)
146: #endif
147:
148: #if STAT_STATFS4 /* SVR3, Dynix, Irix. */
149: struct statfs fsd;
150:
151: if (statfs (path, &fsd, sizeof fsd, 0) < 0)
152: return -1;
153: /* Empirically, the block counts on most SVR3 and SVR3-derived
154: systems seem to always be in terms of 512-byte blocks,
155: no matter what value f_bsize has. */
156: #define convert_blocks(b) (b)
157: #ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx. */
158: #define f_bavail f_bfree
159: #endif
160: #endif
161:
162: #if STAT_STATVFS /* SVR4. */
163: struct statvfs fsd;
164:
165: if (statvfs (path, &fsd) < 0)
166: return -1;
167: /* f_frsize isn't guaranteed to be supported. */
168: #define convert_blocks(b) \
169: adjust_blocks ((b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
170: #endif
171:
172: #if STAT_USTAT
173: {
174: struct stat sstat;
175: struct ustat s;
176:
177: if (stat (path, &sstat) < 0
178: || ustat (sstat.st_dev, &s) < 0)
179: return -1;
180: fsp->fsu_blocks = -1;
181: fsp->fsu_bfree = f_tfree;
182: fsp->fsu_bavail = f_tfree;
183: fsp->fsu_files = -1;
184: fsp->fsu_ffree = -1;
185: }
186: #endif
187:
188: #if ! STAT_STATFS2_FS_DATA /* ! Ultrix */
189: #if ! STAT_USTAT
190: #if ! STAT_NONE
191: fsp->fsu_blocks = convert_blocks (fsd.f_blocks);
192: fsp->fsu_bfree = convert_blocks (fsd.f_bfree);
193: fsp->fsu_bavail = convert_blocks (fsd.f_bavail);
194: fsp->fsu_files = fsd.f_files;
195: fsp->fsu_ffree = fsd.f_ffree;
196: #endif
197: #endif
198: #endif
199:
200: return 0;
201: }
202:
203: #ifdef _AIX
204: #ifdef _I386
205: /* AIX PS/2 does not supply statfs. */
206:
207: int
208: statfs (path, fsb)
209: char *path;
210: struct statfs *fsb;
211: {
212: struct stat stats;
213: struct dustat fsd;
214:
215: if (stat (path, &stats))
216: return -1;
217: if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
218: return -1;
219: fsb->f_type = 0;
220: fsb->f_bsize = fsd.du_bsize;
221: fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
222: fsb->f_bfree = fsd.du_tfree;
223: fsb->f_bavail = fsd.du_tfree;
224: fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb;
225: fsb->f_ffree = fsd.du_tinode;
226: fsb->f_fsid.val[0] = fsd.du_site;
227: fsb->f_fsid.val[1] = fsd.du_pckno;
228: return 0;
229: }
230: #endif
231: #endif /* _AIX && _I386 */
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