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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
#include "cache.h"
#include "fsmonitor.h"
#include "simple-ipc.h"
#include "fsmonitor-ipc.h"
#include "run-command.h"
#include "strbuf.h"
#include "trace2.h"
#ifndef HAVE_FSMONITOR_DAEMON_BACKEND
/*
* A trivial implementation of the fsmonitor_ipc__ API for unsupported
* platforms.
*/
int fsmonitor_ipc__is_supported(void)
{
return 0;
}
const char *fsmonitor_ipc__get_path(void)
{
return NULL;
}
enum ipc_active_state fsmonitor_ipc__get_state(void)
{
return IPC_STATE__OTHER_ERROR;
}
int fsmonitor_ipc__send_query(const char *since_token,
struct strbuf *answer)
{
return -1;
}
int fsmonitor_ipc__send_command(const char *command,
struct strbuf *answer)
{
return -1;
}
#else
int fsmonitor_ipc__is_supported(void)
{
return 1;
}
GIT_PATH_FUNC(fsmonitor_ipc__get_path, "fsmonitor--daemon.ipc")
enum ipc_active_state fsmonitor_ipc__get_state(void)
{
return ipc_get_active_state(fsmonitor_ipc__get_path());
}
static int spawn_daemon(void)
{
const char *args[] = { "fsmonitor--daemon", "start", NULL };
return run_command_v_opt_tr2(args, RUN_COMMAND_NO_STDIN | RUN_GIT_CMD,
"fsmonitor");
}
int fsmonitor_ipc__send_query(const char *since_token,
struct strbuf *answer)
{
int ret = -1;
int tried_to_spawn = 0;
enum ipc_active_state state = IPC_STATE__OTHER_ERROR;
struct ipc_client_connection *connection = NULL;
struct ipc_client_connect_options options
= IPC_CLIENT_CONNECT_OPTIONS_INIT;
const char *tok = since_token ? since_token : "";
size_t tok_len = since_token ? strlen(since_token) : 0;
options.wait_if_busy = 1;
options.wait_if_not_found = 0;
trace2_region_enter("fsm_client", "query", NULL);
trace2_data_string("fsm_client", NULL, "query/command", tok);
try_again:
state = ipc_client_try_connect(fsmonitor_ipc__get_path(), &options,
&connection);
switch (state) {
case IPC_STATE__LISTENING:
ret = ipc_client_send_command_to_connection(
connection, tok, tok_len, answer);
ipc_client_close_connection(connection);
trace2_data_intmax("fsm_client", NULL,
"query/response-length", answer->len);
goto done;
case IPC_STATE__NOT_LISTENING:
case IPC_STATE__PATH_NOT_FOUND:
if (tried_to_spawn)
goto done;
tried_to_spawn++;
if (spawn_daemon())
goto done;
/*
* Try again, but this time give the daemon a chance to
* actually create the pipe/socket.
*
* Granted, the daemon just started so it can't possibly have
* any FS cached yet, so we'll always get a trivial answer.
* BUT the answer should include a new token that can serve
* as the basis for subsequent requests.
*/
options.wait_if_not_found = 1;
goto try_again;
case IPC_STATE__INVALID_PATH:
ret = error(_("fsmonitor_ipc__send_query: invalid path '%s'"),
fsmonitor_ipc__get_path());
goto done;
case IPC_STATE__OTHER_ERROR:
default:
ret = error(_("fsmonitor_ipc__send_query: unspecified error on '%s'"),
fsmonitor_ipc__get_path());
goto done;
}
done:
trace2_region_leave("fsm_client", "query", NULL);
return ret;
}
int fsmonitor_ipc__send_command(const char *command,
struct strbuf *answer)
{
struct ipc_client_connection *connection = NULL;
struct ipc_client_connect_options options
= IPC_CLIENT_CONNECT_OPTIONS_INIT;
int ret;
enum ipc_active_state state;
const char *c = command ? command : "";
size_t c_len = command ? strlen(command) : 0;
strbuf_reset(answer);
options.wait_if_busy = 1;
options.wait_if_not_found = 0;
state = ipc_client_try_connect(fsmonitor_ipc__get_path(), &options,
&connection);
if (state != IPC_STATE__LISTENING) {
die(_("fsmonitor--daemon is not running"));
return -1;
}
ret = ipc_client_send_command_to_connection(connection, c, c_len,
answer);
ipc_client_close_connection(connection);
if (ret == -1) {
die(_("could not send '%s' command to fsmonitor--daemon"), c);
return -1;
}
return 0;
}
#endif
|
