ia64/xen-unstable

view tools/xenstore/xs_lib.h @ 6946:e703abaf6e3d

Add behaviour to the remove methods to remove the transaction's path itself. This allows us to write Remove(path) to remove the specified path rather than having to slice the path ourselves.
author emellor@ewan
date Sun Sep 18 14:42:13 2005 +0100 (2005-09-18)
parents 3233e7ecfa9f
children 06d84bf87159
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 <xenctrl.h>
27 /* Bitmask of permissions. */
28 enum xs_perm_type {
29 XS_PERM_NONE = 0,
30 XS_PERM_READ = 1,
31 XS_PERM_WRITE = 2,
32 /* Internal use. */
33 XS_PERM_ENOENT_OK = 4,
34 XS_PERM_OWNER = 8,
35 };
37 struct xs_permissions
38 {
39 domid_t id;
40 enum xs_perm_type perms;
41 };
43 /* Each 10 bits takes ~ 3 digits, plus one, plus one for nul terminator. */
44 #define MAX_STRLEN(x) ((sizeof(x) * CHAR_BIT + CHAR_BIT-1) / 10 * 3 + 2)
46 /* Path for various daemon things: env vars can override. */
47 const char *xs_daemon_socket(void);
48 const char *xs_daemon_socket_ro(void);
49 const char *xs_daemon_store(void);
50 const char *xs_daemon_transactions(void);
51 const char *xs_domain_dev(void);
53 /* Simple write function: loops for you. */
54 bool xs_write_all(int fd, const void *data, unsigned int len);
56 /* Convert strings to permissions. False if a problem. */
57 bool xs_strings_to_perms(struct xs_permissions *perms, unsigned int num,
58 const char *strings);
60 /* Convert permissions to a string (up to len MAX_STRLEN(domid_t)+1). */
61 bool xs_perm_to_string(const struct xs_permissions *perm, char *buffer);
63 /* Given a string and a length, count how many strings (nul terms). */
64 unsigned int xs_count_strings(const char *strings, unsigned int len);
66 #endif /* _XS_LIB_H */