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
|
/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: clib/src/watch.c $ */
/* */
/* OpenPOWER FFS Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2014,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/*
* File: watch.c
* Author: Shaun Wetzstein <shaun@us.ibm.com>
* Descr:
* Note:
* Date: 10/03/10
*/
#include <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <malloc.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include "misc.h"
#include "nargs.h"
#include "watch.h"
#define WATCH_PAGE_SIZE 64
#define WATCH_EVENT_SIZE 64
/* ======================================================================= */
const char *__watch_msg[] = {
"watch: unexpected NULL self pointer",
"watch: unexpected NULL callback structure",
};
#define WATCH_NULL (__watch_msg[0])
#define WATCH_CALLBACK_NULL (__watch_msg[1])
/* ======================================================================= */
void watch_init(watch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(WATCH_NULL);
if (self->fd != -1)
close(self->fd), self->fd = -1;
self->fd = inotify_init1(IN_CLOEXEC);
if (unlikely(self->fd == -1))
throw_errno(errno);
array_init(&self->callbacks, sizeof(watch_callback_t), WATCH_PAGE_SIZE);
}
void watch_delete(watch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(WATCH_NULL);
close(self->fd), self->fd = -1;
array_delete(&self->callbacks);
}
int watch_fileno(watch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(WATCH_NULL);
return self->fd;
}
uint32_t watch_add(watch_t * self, const char *path, uint32_t events,
watch_callback_t * cb)
{
if (unlikely(self == NULL))
throw_unexpected(WATCH_NULL);
if (access(path, F_OK) != 0)
throw_errno(errno);
uint32_t wd = inotify_add_watch(self->fd, path, events);
if (unlikely((int)wd == -1))
throw_errno(errno);
if (cb != NULL)
array_put(&self->callbacks, wd, cb, 1);
return wd;
}
void watch_remove(watch_t * self, uint32_t wd)
{
if (unlikely(self == NULL))
throw_unexpected(WATCH_NULL);
int rc = inotify_rm_watch(self->fd, wd);
if (unlikely(rc == -1))
throw_errno(errno);
array_status(&self->callbacks, wd, false);
}
void watch_wait(watch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(WATCH_NULL);
/* FIX ME */
watch_event_t events[WATCH_EVENT_SIZE];
ssize_t n = read(self->fd, events, sizeof events);
printf("n[%d]\n", n);
for (ssize_t i = 0; i < (ssize_t) (n / sizeof *events); i++)
printf("%d: wd[%d] mask[%x] cookie[%x] name[%.*s]\n",
i, events[i].wd, events[i].mask, events[i].cookie,
events[i].len, events[i].name);
}
/* ======================================================================= */
|
