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
|
/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/LexicalPath.h>
#include <AK/Random.h>
#include <LibCore/ArgsParser.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
constexpr const char* default_template = "tmp.XXXXXXXXXX";
static char* generate_random_filename(const char* pattern)
{
char* new_filename = strdup(pattern);
int pattern_length = strlen(pattern);
static constexpr char random_characters[] = "abcdefghijklmnopqrstuvwxyz0123456789";
for (auto i = pattern_length - 1; i >= 0; --i) {
if (pattern[i] != 'X')
break;
new_filename[i] = random_characters[(get_random<u32>() % (sizeof(random_characters) - 1))];
}
return new_filename;
}
static char* make_temp(const char* pattern, bool directory, bool dry_run)
{
for (int i = 0; i < 100; ++i) {
char* path = generate_random_filename(pattern);
if (dry_run) {
struct stat stat;
auto rc = lstat(path, &stat);
if (rc < 0 && errno == ENOENT)
return path;
} else if (directory) {
if (!mkdir(path, 0700))
return path;
} else {
auto fd = open(path, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
if (fd >= 0) {
close(fd);
return path;
}
}
free(path);
}
return nullptr;
}
int main(int argc, char** argv)
{
if (pledge("stdio rpath wpath cpath", nullptr)) {
perror("pledge");
return 1;
}
const char* file_template = nullptr;
bool create_directory = false;
bool dry_run = false;
bool quiet = false;
const char* target_directory = nullptr;
Core::ArgsParser args_parser;
args_parser.set_general_help("Create a temporary file or directory, safely, and print its name.");
args_parser.add_positional_argument(file_template, "The template must contain at least 3 consecutive 'X's", "template", Core::ArgsParser::Required::No);
args_parser.add_option(create_directory, "Create a temporary directory instead of a file", "directory", 'd');
args_parser.add_option(dry_run, "Do not create anything, just print a unique name", "dry-run", 'u');
args_parser.add_option(quiet, "Do not print diagnostics about file/directory creation failure", "quiet", 'q');
args_parser.add_option(target_directory, "Create TEMPLATE relative to DIR", "tmpdir", 'p', "DIR");
args_parser.parse(argc, argv);
if (!target_directory) {
if (file_template) { // If a custom template is specified we assume the target directory is the current directory
target_directory = getcwd(nullptr, 0);
} else {
LexicalPath template_path(file_template);
const char* env_directory = getenv("TMPDIR");
target_directory = env_directory && *env_directory ? env_directory : "/tmp";
}
}
if (!file_template) {
file_template = default_template;
}
if (!String(file_template).find("XXX").has_value()) {
if (!quiet)
warnln("Too few X's in template {}", file_template);
return 1;
}
LexicalPath target_path(String::formatted("{}/{}", target_directory, file_template));
if (!target_path.is_valid()) {
if (!quiet)
warnln("Invalid template path {}", target_path.string().characters());
return 1;
}
char* final_path = make_temp(target_path.string().characters(), create_directory, dry_run);
if (!final_path) {
if (!quiet) {
if (create_directory)
warnln("Failed to create directory via template {}", target_path.string().characters());
else
warnln("Failed to create file via template {}", target_path.string().characters());
}
return 1;
}
outln(final_path);
free(final_path);
return 0;
}
|
