1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
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 of the License, or
7 * (at your option) any later version.
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.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 #ifndef GUESTFSD_DAEMON_H
20 #define GUESTFSD_DAEMON_H
25 #include <sys/types.h>
28 #include <rpc/types.h>
31 #include "../src/guestfs_protocol.h"
33 /*-- in guestfsd.c --*/
34 extern int xwrite (int sock, const void *buf, size_t len);
35 extern int xread (int sock, void *buf, size_t len);
37 extern int add_string (char ***argv, int *size, int *alloc, const char *str);
38 extern int count_strings (char * const* const argv);
39 extern void sort_strings (char **argv, int len);
40 extern void free_strings (char **argv);
41 extern void free_stringslen (char **argv, int len);
43 extern int command (char **stdoutput, char **stderror, const char *name, ...);
44 extern int commandv (char **stdoutput, char **stderror,
45 char * const* const argv);
52 extern int root_mounted;
54 /*-- in stubs.c (auto-generated) --*/
55 extern void dispatch_incoming_message (XDR *);
56 extern guestfs_lvm_int_pv_list *parse_command_line_pvs (void);
57 extern guestfs_lvm_int_vg_list *parse_command_line_vgs (void);
58 extern guestfs_lvm_int_lv_list *parse_command_line_lvs (void);
61 extern void main_loop (int sock);
63 /* ordinary daemon functions use these to indicate errors */
64 extern void reply_with_error (const char *fs, ...);
65 extern void reply_with_perror (const char *fs, ...);
67 /* daemon functions that receive files (FileIn) should call
68 * receive_file for each FileIn parameter.
71 extern void receive_file ();
74 /* daemon functions that return files (FileOut) should call
75 * reply, then send_file for each FileOut parameter.
78 extern void send_file ();
81 /* only call this if there is a FileOut parameter */
82 extern void reply (xdrproc_t xdrp, char *ret);
84 /* Helper for functions that need a root filesystem mounted. */
85 #define NEED_ROOT(errcode) \
87 if (!root_mounted) { \
88 reply_with_error ("%s: you must call 'mount' first to mount the root filesystem", __func__); \
94 /* Helper for functions that need an argument ("path") that is absolute. */
95 #define ABS_PATH(path,errcode) \
97 if ((path)[0] != '/') { \
98 reply_with_error ("%s: path must start with a / character", __func__); \
103 /* Helper for functions that need an argument ("path") that is a device. */
104 #define IS_DEVICE(path,errcode) \
106 struct stat statbuf; \
107 if (strncmp ((path), "/dev/", 5) != 0) { \
108 reply_with_error ("%s: %s: expecting a device name", __func__, (path)); \
111 if (stat ((path), &statbuf) == -1) { \
112 reply_with_perror ("%s: %s", __func__, (path)); \
117 /* Helper for functions which need either an absolute path in the
118 * mounted filesystem, OR a /dev/ device which exists.
120 #define NEED_ROOT_OR_IS_DEVICE(path,errcode) \
122 if (strncmp ((path), "/dev/", 5) == 0) \
123 IS_DEVICE ((path),(errcode)); \
125 NEED_ROOT ((path),(errcode)); \
126 ABS_PATH ((path),(errcode)); \
131 * (1) You must match CHROOT_IN and CHROOT_OUT even along error paths.
132 * (2) You must not change directory! cwd must always be "/", otherwise
133 * we can't escape our own chroot.
134 * (3) All paths specified must be absolute.
135 * (4) CHROOT_OUT does not affect errno.
137 #define CHROOT_IN chroot ("/sysroot");
139 do { int old_errno = errno; chroot ("."); errno = old_errno; } while (0)
141 /* Marks functions which are not implemented. */
142 #define XXX_NOT_IMPL(errcode) \
144 reply_with_error ("%s: function not implemented", __func__); \
149 #endif /* GUESTFSD_DAEMON_H */