ia64/xen-unstable

view tools/xenstore/xs_lib.h @ 8740:3d7ea7972b39

Update patches for linux 2.6.15.

Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
author cl349@firebug.cl.cam.ac.uk
date Thu Feb 02 17:16:00 2006 +0000 (2006-02-02)
parents b3a255e88810
children 08f5adb5058b
line source
1 /*
2 Common routines between Xen store user library and daemon.
3 Copyright (C) 2005 Rusty Russell IBM Corporation
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
20 #ifndef _XS_LIB_H
21 #define _XS_LIB_H
23 #include <stdbool.h>
24 #include <limits.h>
25 #include <errno.h>
26 #include <stdint.h>
27 #include <xen/io/xs_wire.h>
29 /* Bitmask of permissions. */
30 enum xs_perm_type {
31 XS_PERM_NONE = 0,
32 XS_PERM_READ = 1,
33 XS_PERM_WRITE = 2,
34 /* Internal use. */
35 XS_PERM_ENOENT_OK = 4,
36 XS_PERM_OWNER = 8,
37 };
39 struct xs_permissions
40 {
41 unsigned int id;
42 enum xs_perm_type perms;
43 };
45 /* Each 10 bits takes ~ 3 digits, plus one, plus one for nul terminator. */
46 #define MAX_STRLEN(x) ((sizeof(x) * CHAR_BIT + CHAR_BIT-1) / 10 * 3 + 2)
48 /* Path for various daemon things: env vars can override. */
49 const char *xs_daemon_socket(void);
50 const char *xs_daemon_socket_ro(void);
51 const char *xs_domain_dev(void);
52 const char *xs_daemon_tdb(void);
54 /* Simple write function: loops for you. */
55 bool xs_write_all(int fd, const void *data, unsigned int len);
57 /* Convert strings to permissions. False if a problem. */
58 bool xs_strings_to_perms(struct xs_permissions *perms, unsigned int num,
59 const char *strings);
61 /* Convert permissions to a string (up to len MAX_STRLEN(unsigned int)+1). */
62 bool xs_perm_to_string(const struct xs_permissions *perm, char *buffer);
64 /* Given a string and a length, count how many strings (nul terms). */
65 unsigned int xs_count_strings(const char *strings, unsigned int len);
67 #endif /* _XS_LIB_H */