summaryrefslogtreecommitdiffstats
path: root/qemu-ga.texi
blob: 4c7a8fd16329434f0bbfc81298b88929809592f0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
@example
@c man begin SYNOPSIS
@command{qemu-ga} [@var{OPTIONS}]
@c man end
@end example

@c man begin DESCRIPTION

The QEMU Guest Agent is a daemon intended to be run within virtual
machines. It allows the hypervisor host to perform various operations
in the guest, such as:

@itemize
@item
get information from the guest
@item
set the guest's system time
@item
read/write a file
@item
sync and freeze the filesystems
@item
suspend the guest
@item
reconfigure guest local processors
@item
set user's password
@item
...
@end itemize

qemu-ga will read a system configuration file on startup (located at
@file{/etc/qemu/qemu-ga.conf} by default), then parse remaining
configuration options on the command line. For the same key, the last
option wins, but the lists accumulate (see below for configuration
file format).

@c man end

@c man begin OPTIONS
@table @option
@item -m, --method=@var{method}
  Transport method: one of @samp{unix-listen}, @samp{virtio-serial}, or
  @samp{isa-serial} (@samp{virtio-serial} is the default).

@item -p, --path=@var{path}
  Device/socket path (the default for virtio-serial is
  @samp{/dev/virtio-ports/org.qemu.guest_agent.0},
  the default for isa-serial is @samp{/dev/ttyS0})

@item -l, --logfile=@var{path}
  Set log file path (default is stderr).

@item -f, --pidfile=@var{path}
  Specify pid file (default is @samp{/var/run/qemu-ga.pid}).

@item -F, --fsfreeze-hook=@var{path}
  Enable fsfreeze hook. Accepts an optional argument that specifies
  script to run on freeze/thaw. Script will be called with
  'freeze'/'thaw' arguments accordingly (default is
  @samp{/etc/qemu/fsfreeze-hook}). If using -F with an argument, do
  not follow -F with a space (for example:
  @samp{-F/var/run/fsfreezehook.sh}).

@item -t, --statedir=@var{path}
  Specify the directory to store state information (absolute paths only,
  default is @samp{/var/run}).

@item -v, --verbose
  Log extra debugging information.

@item -V, --version
  Print version information and exit.

@item -d, --daemon
  Daemonize after startup (detach from terminal).

@item -b, --blacklist=@var{list}
  Comma-separated list of RPCs to disable (no spaces, @samp{?} to list
  available RPCs).

@item -D, --dump-conf
  Dump the configuration in a format compatible with @file{qemu-ga.conf}
  and exit.

@item -h, --help
  Display this help and exit.
@end table

@c man end

@c man begin FILES

The syntax of the @file{qemu-ga.conf} configuration file follows the
Desktop Entry Specification, here is a quick summary: it consists of
groups of key-value pairs, interspersed with comments.

@example
# qemu-ga configuration sample
[general]
daemonize = 0
pidfile = /var/run/qemu-ga.pid
verbose = 0
method = virtio-serial
path = /dev/virtio-ports/org.qemu.guest_agent.0
statedir = /var/run
@end example

The list of keys follows the command line options:
@table @option
@item daemon= boolean
@item method= string
@item path= string
@item logfile= string
@item pidfile= string
@item fsfreeze-hook= string
@item statedir= string
@item verbose= boolean
@item blacklist= string list
@end table

@c man end

@ignore

@setfilename qemu-ga
@settitle QEMU Guest Agent

@c man begin AUTHOR
Michael Roth <mdroth@linux.vnet.ibm.com>
@c man end

@c man begin SEEALSO
qemu(1)
@c man end

@end ignore