1 /*-
2 * See the file LICENSE for redistribution information.
3 *
4 * Copyright (c) 1997, 1998
5 * Sleepycat Software. All rights reserved.
6 */
7
8 #include "config.h"
9
10 #ifndef lint
11 static const char sccsid[] = "@(#)os_stat.c 10.18 (Sleepycat) 10/12/98";
12 #endif /* not lint */
13
14 #ifndef NO_SYSTEM_INCLUDES
15 #include <sys/types.h>
16 #include <sys/stat.h>
17
18 #include <errno.h>
19 #endif
20
21 #include "db_int.h"
22 #include "os_jump.h"
23
24 /*
25 * __os_exists --
26 * Return if the file exists.
27 *
28 * PUBLIC: int __os_exists __P((const char *, int *));
29 */
30 int
__os_exists(path,isdirp)31 __os_exists(path, isdirp)
32 const char *path;
33 int *isdirp;
34 {
35 struct stat sb;
36
37 if (__db_jump.j_exists != NULL)
38 return (__db_jump.j_exists(path, isdirp));
39
40 if (stat(path, &sb) != 0)
41 return (errno);
42
43 #if !defined(S_ISDIR) || defined(STAT_MACROS_BROKEN)
44 #if defined(_WIN32) || defined(WIN16)
45 #define S_ISDIR(m) (_S_IFDIR & (m))
46 #else
47 #define S_ISDIR(m) (((m) & 0170000) == 0040000)
48 #endif
49 #endif
50 if (isdirp != NULL)
51 *isdirp = S_ISDIR(sb.st_mode);
52
53 return (0);
54 }
55
56 /*
57 * __os_ioinfo --
58 * Return file size and I/O size; abstracted to make it easier
59 * to replace.
60 *
61 * PUBLIC: int __os_ioinfo
62 * PUBLIC: __P((const char *, int, u_int32_t *, u_int32_t *, u_int32_t *));
63 */
64 int
__os_ioinfo(path,fd,mbytesp,bytesp,iosizep)65 __os_ioinfo(path, fd, mbytesp, bytesp, iosizep)
66 const char *path;
67 int fd;
68 u_int32_t *mbytesp, *bytesp, *iosizep;
69 {
70 struct stat sb;
71
72 if (__db_jump.j_ioinfo != NULL)
73 return (__db_jump.j_ioinfo(path, fd, mbytesp, bytesp, iosizep));
74
75 if (fstat(fd, &sb) == -1)
76 return (errno);
77
78 /* Return the size of the file. */
79 if (mbytesp != NULL)
80 *mbytesp = sb.st_size / MEGABYTE;
81 if (bytesp != NULL)
82 *bytesp = sb.st_size % MEGABYTE;
83
84 /*
85 * Return the underlying filesystem blocksize, if available.
86 *
87 * XXX
88 * Check for a 0 size -- the HP MPE/iX architecture has st_blksize,
89 * but it's always 0.
90 */
91 #ifdef HAVE_ST_BLKSIZE
92 if (iosizep != NULL && (*iosizep = sb.st_blksize) == 0)
93 *iosizep = DB_DEF_IOSIZE;
94 #else
95 if (iosizep != NULL)
96 *iosizep = DB_DEF_IOSIZE;
97 #endif
98 return (0);
99 }
100