xref: /titanic_51/usr/src/cmd/sendmail/db/os/os_stat.c (revision 791a814c934fcd4deb13b26c1f116ff283272a0d)
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
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
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