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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright (c) 2020, Maciej Zygmanowski <sppmacd@pm.me>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/ByteBuffer.h>
#include <AK/GenericLexer.h>
#include <AK/HashMap.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonParser.h>
#include <AK/JsonValue.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <ctype.h>
#include <stdio.h>
struct OpenFile {
int fd;
int pid;
String type;
String name;
String state;
String full_name;
};
static bool parse_name(StringView name, OpenFile& file)
{
GenericLexer lexer(name);
auto component1 = lexer.consume_until(':');
if (lexer.tell_remaining() == 0) {
file.name = component1;
return true;
} else {
file.type = component1;
auto component2 = lexer.consume_while([](char c) { return isprint(c) && !isspace(c) && c != '('; });
lexer.ignore_while(isspace);
file.name = component2;
if (lexer.tell_remaining() == 0) {
return true;
} else {
if (!lexer.consume_specific('(')) {
dbg() << "parse_name: expected (";
return false;
}
auto component3 = lexer.consume_until(')');
if (lexer.tell_remaining() != 0) {
dbg() << "parse_name: expected EOF";
return false;
}
file.state = component3;
return true;
}
}
}
static Vector<OpenFile> get_open_files_by_pid(pid_t pid)
{
auto file = Core::File::open(String::format("/proc/%d/fds", pid), Core::IODevice::OpenMode::ReadOnly);
if (file.is_error()) {
printf("lsof: PID %d: %s\n", pid, file.error().characters());
return Vector<OpenFile>();
}
auto data = file.value()->read_all();
JsonParser parser(data);
auto result = parser.parse();
if (!result.has_value()) {
ASSERT_NOT_REACHED();
}
Vector<OpenFile> files;
result.value().as_array().for_each([pid, &files](const JsonValue& object) {
OpenFile open_file;
open_file.pid = pid;
open_file.fd = object.as_object().get("fd").to_int();
String name = object.as_object().get("absolute_path").to_string();
ASSERT(parse_name(name, open_file));
open_file.full_name = name;
files.append(open_file);
});
return files;
}
static void display_entry(const OpenFile& file, const Core::ProcessStatistics& statistics)
{
printf("%-28s %4d %4d %-10s %4d %s\n", statistics.name.characters(), file.pid, statistics.pgid, statistics.username.characters(), file.fd, file.full_name.characters());
}
int main(int argc, char* argv[])
{
if (pledge("stdio rpath proc", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/proc", "r") < 0) {
perror("unveil /proc");
return 1;
}
// needed by ProcessStatisticsReader::get_all()
if (unveil("/etc/passwd", "r") < 0) {
perror("unveil /etc/passwd");
return 1;
}
unveil(nullptr, nullptr);
bool arg_all_processes { false };
int arg_fd { -1 };
const char* arg_uid { nullptr };
int arg_uid_int = -1;
int arg_pgid { -1 };
pid_t arg_pid { -1 };
const char* arg_file_name { nullptr };
if (argc == 1)
arg_all_processes = true;
else {
Core::ArgsParser parser;
parser.set_general_help("List open files of a processes. This can mean actual files in the file system, sockets, pipes, etc.");
parser.add_option(arg_pid, "Select by PID", nullptr, 'p', "pid");
parser.add_option(arg_fd, "Select by file descriptor", nullptr, 'd', "fd");
parser.add_option(arg_uid, "Select by login/UID", nullptr, 'u', "login/UID");
parser.add_option(arg_pgid, "Select by process group ID", nullptr, 'g', "PGID");
parser.add_positional_argument(arg_file_name, "File name", "file name", Core::ArgsParser::Required::No);
parser.parse(argc, argv);
}
{
// try convert UID to int
auto arg = String(arg_uid).to_int();
if (arg.has_value())
arg_uid_int = arg.value();
}
printf("%-28s %4s %4s %-10s %4s %s\n", "COMMAND", "PID", "PGID", "USER", "FD", "NAME");
if (arg_pid == -1) {
auto processes = Core::ProcessStatisticsReader::get_all();
for (auto process : processes) {
if (process.key == 0)
continue;
auto open_files = get_open_files_by_pid(process.key);
if (open_files.is_empty())
continue;
for (auto file : open_files) {
if ((arg_all_processes)
|| (arg_fd != -1 && file.fd == arg_fd)
|| (arg_uid_int != -1 && (int)process.value.uid == arg_uid_int)
|| (arg_uid != nullptr && process.value.username == arg_uid)
|| (arg_pgid != -1 && (int)process.value.pgid == arg_pgid)
|| (arg_file_name != nullptr && file.name == arg_file_name))
display_entry(file, process.value);
}
}
} else {
auto processes = Core::ProcessStatisticsReader::get_all();
auto open_files = get_open_files_by_pid(arg_pid);
if (open_files.is_empty())
return 0;
for (auto file : open_files) {
display_entry(file, processes.get(arg_pid).value());
}
}
return 0;
}
|
