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
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdio.h>
#include <getopt.h>
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "util.h"
#include "def.h"
#include "readahead-common.h"
unsigned arg_files_max = 16*1024;
off_t arg_file_size_max = READAHEAD_FILE_SIZE_MAX;
usec_t arg_timeout = 2*USEC_PER_MINUTE;
static int help(void) {
printf("%s [OPTIONS...] collect [DIRECTORY]\n\n"
"Collect read-ahead data on early boot.\n\n"
" -h --help Show this help\n"
" --max-files=INT Maximum number of files to read ahead\n"
" --file-size-max=BYTES Maximum size of files to read ahead\n"
" --timeout=USEC Maximum time to spend collecting data\n\n\n",
program_invocation_short_name);
printf("%s [OPTIONS...] replay [DIRECTORY]\n\n"
"Replay collected read-ahead data on early boot.\n\n"
" -h --help Show this help\n"
" --file-size-max=BYTES Maximum size of files to read ahead\n\n\n",
program_invocation_short_name);
printf("%s [OPTIONS...] analyze [PACK FILE]\n\n"
"Analyze collected read-ahead data.\n\n"
" -h --help Show this help\n",
program_invocation_short_name);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_FILES_MAX = 0x100,
ARG_FILE_SIZE_MAX,
ARG_TIMEOUT
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "files-max", required_argument, NULL, ARG_FILES_MAX },
{ "file-size-max", required_argument, NULL, ARG_FILE_SIZE_MAX },
{ "timeout", required_argument, NULL, ARG_TIMEOUT },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
switch (c) {
case 'h':
help();
return 0;
case ARG_FILES_MAX:
if (safe_atou(optarg, &arg_files_max) < 0 || arg_files_max <= 0) {
log_error("Failed to parse maximum number of files %s.", optarg);
return -EINVAL;
}
break;
case ARG_FILE_SIZE_MAX: {
unsigned long long ull;
if (safe_atollu(optarg, &ull) < 0 || ull <= 0) {
log_error("Failed to parse maximum file size %s.", optarg);
return -EINVAL;
}
arg_file_size_max = (off_t) ull;
break;
}
case ARG_TIMEOUT:
if (parse_usec(optarg, &arg_timeout) < 0 || arg_timeout <= 0) {
log_error("Failed to parse timeout %s.", optarg);
return -EINVAL;
}
break;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
if (optind != argc-1 &&
optind != argc-2) {
help();
return -EINVAL;
}
return 1;
}
int main(int argc, char *argv[]) {
int r;
log_set_target(LOG_TARGET_SAFE);
log_parse_environment();
log_open();
umask(0022);
r = parse_argv(argc, argv);
if (r <= 0)
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
if (streq(argv[optind], "collect"))
return main_collect(argv[optind+1]);
else if (streq(argv[optind], "replay"))
return main_replay(argv[optind+1]);
else if (streq(argv[optind], "analyze"))
return main_analyze(argv[optind+1]);
log_error("Unknown verb %s.", argv[optind]);
return EXIT_FAILURE;
}
|
