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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include "alloc-util.h"
#include "build.h"
#include "log.h"
#include "main-func.h"
#include "path-util.h"
#include "pretty-print.h"
#include "string-util.h"
#include "strv.h"
#include "unit-name.h"
static enum {
ACTION_ESCAPE,
ACTION_UNESCAPE,
ACTION_MANGLE
} arg_action = ACTION_ESCAPE;
static const char *arg_suffix = NULL;
static const char *arg_template = NULL;
static bool arg_path = false;
static bool arg_instance = false;
static int help(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("systemd-escape", "1", &link);
if (r < 0)
return log_oom();
printf("%s [OPTIONS...] [NAME...]\n\n"
"Escape strings for usage in systemd unit names.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --suffix=SUFFIX Unit suffix to append to escaped strings\n"
" --template=TEMPLATE Insert strings as instance into template\n"
" --instance With --unescape, show just the instance part\n"
" -u --unescape Unescape strings\n"
" -m --mangle Mangle strings\n"
" -p --path When escaping/unescaping assume the string is a path\n"
"\nSee the %s for details.\n",
program_invocation_short_name,
link);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_SUFFIX,
ARG_TEMPLATE
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "suffix", required_argument, NULL, ARG_SUFFIX },
{ "template", required_argument, NULL, ARG_TEMPLATE },
{ "unescape", no_argument, NULL, 'u' },
{ "mangle", no_argument, NULL, 'm' },
{ "path", no_argument, NULL, 'p' },
{ "instance", no_argument, NULL, 'i' },
{}
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
case ARG_VERSION:
return version();
case ARG_SUFFIX: {
UnitType t = unit_type_from_string(optarg);
if (t < 0)
return log_error_errno(t, "Invalid unit suffix type \"%s\".", optarg);
arg_suffix = optarg;
break;
}
case ARG_TEMPLATE:
if (!unit_name_is_valid(optarg, UNIT_NAME_TEMPLATE))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Template name %s is not valid.", optarg);
arg_template = optarg;
break;
case 'u':
arg_action = ACTION_UNESCAPE;
break;
case 'm':
arg_action = ACTION_MANGLE;
break;
case 'p':
arg_path = true;
break;
case 'i':
arg_instance = true;
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
if (optind >= argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Not enough arguments.");
if (arg_template && arg_suffix)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--suffix= and --template= may not be combined.");
if ((arg_template || arg_suffix) && arg_action == ACTION_MANGLE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--suffix= and --template= are not compatible with --mangle.");
if (arg_suffix && arg_action == ACTION_UNESCAPE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--suffix is not compatible with --unescape.");
if (arg_path && !IN_SET(arg_action, ACTION_ESCAPE, ACTION_UNESCAPE))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--path may not be combined with --mangle.");
if (arg_instance && arg_action != ACTION_UNESCAPE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--instance must be used in conjunction with --unescape.");
if (arg_instance && arg_template)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--instance may not be combined with --template.");
return 1;
}
static int run(int argc, char *argv[]) {
int r;
log_setup();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
STRV_FOREACH(i, argv + optind) {
_cleanup_free_ char *e = NULL;
switch (arg_action) {
case ACTION_ESCAPE:
if (arg_path) {
r = unit_name_path_escape(*i, &e);
if (r < 0) {
if (r == -EINVAL) {
/* If escaping failed because the string was invalid, let's print a
* friendly message about it. Catch these specific error cases
* explicitly. */
if (!path_is_valid(*i))
return log_error_errno(r, "Input '%s' is not a valid file system path, failed to escape.", *i);
if (!path_is_absolute(*i))
return log_error_errno(r, "Input '%s' is not an absolute file system path, failed to escape.", *i);
if (!path_is_normalized(*i))
return log_error_errno(r, "Input '%s' is not a normalized file system path, failed to escape.", *i);
}
/* All other error cases. */
return log_error_errno(r, "Failed to escape string: %m");
}
/* If the escaping worked, then still warn if the path is not like we'd like
* it. Because that means escaping is not necessarily reversible. */
if (!path_is_valid(*i))
log_warning("Input '%s' is not a valid file system path, escaping is likely not going to be reversible.", *i);
else if (!path_is_absolute(*i))
log_warning("Input '%s' is not an absolute file system path, escaping is likely not going to be reversible.", *i);
/* Note that we don't complain about paths not being normalized here, because
* some forms of non-normalization is actually OK, such as a series // and
* unit_name_path_escape() will clean those up silently, and the reversal is
* "close enough" to be OK. */
} else {
e = unit_name_escape(*i);
if (!e)
return log_oom();
}
if (arg_template) {
char *x;
r = unit_name_replace_instance(arg_template, e, &x);
if (r < 0)
return log_error_errno(r, "Failed to replace instance: %m");
free_and_replace(e, x);
} else if (arg_suffix) {
if (!strextend(&e, ".", arg_suffix))
return log_oom();
}
break;
case ACTION_UNESCAPE: {
_cleanup_free_ char *name = NULL;
if (arg_template || arg_instance) {
_cleanup_free_ char *template = NULL;
r = unit_name_to_instance(*i, &name);
if (r < 0)
return log_error_errno(r, "Failed to extract instance: %m");
if (isempty(name))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unit %s is missing the instance name.", *i);
r = unit_name_template(*i, &template);
if (r < 0)
return log_error_errno(r, "Failed to extract template: %m");
if (arg_template && !streq(arg_template, template))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unit %s template %s does not match specified template %s.",
*i, template, arg_template);
} else {
name = strdup(*i);
if (!name)
return log_oom();
}
if (arg_path)
r = unit_name_path_unescape(name, &e);
else
r = unit_name_unescape(name, &e);
if (r < 0)
return log_error_errno(r, "Failed to unescape string: %m");
break;
}
case ACTION_MANGLE:
r = unit_name_mangle(*i, 0, &e);
if (r < 0)
return log_error_errno(r, "Failed to mangle name: %m");
break;
}
if (i != argv + optind)
fputc(' ', stdout);
fputs(e, stdout);
}
fputc('\n', stdout);
return 0;
}
DEFINE_MAIN_FUNCTION(run);
|
