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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include "fd-util.h"
#include "fs-util.h"
#include "log.h"
#include "main-func.h"
static char *arg_root = NULL;
static int arg_flags = 0;
static bool arg_open = false;
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_ROOT = 0x1000,
ARG_OPEN,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "root", required_argument, NULL, ARG_ROOT },
{ "open", no_argument, NULL, ARG_OPEN },
{ "prefix-root", no_argument, NULL, CHASE_PREFIX_ROOT },
{ "nonexistent", no_argument, NULL, CHASE_NONEXISTENT },
{ "no_autofs", no_argument, NULL, CHASE_NO_AUTOFS },
{ "safe", no_argument, NULL, CHASE_SAFE },
{ "trail-slash", no_argument, NULL, CHASE_TRAIL_SLASH },
{ "step", no_argument, NULL, CHASE_STEP },
{ "nofollow", no_argument, NULL, CHASE_NOFOLLOW },
{ "warn", no_argument, NULL, CHASE_WARN },
{}
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0)
switch (c) {
case 'h':
printf("Syntax:\n"
" %s [OPTION...] path...\n"
"Options:\n"
, argv[0]);
for (size_t i = 0; i < ELEMENTSOF(options) - 1; i++)
printf(" --%s\n", options[i].name);
return 0;
case ARG_ROOT:
arg_root = optarg;
break;
case ARG_OPEN:
arg_open = true;
break;
case CHASE_PREFIX_ROOT:
case CHASE_NONEXISTENT:
case CHASE_NO_AUTOFS:
case CHASE_SAFE:
case CHASE_TRAIL_SLASH:
case CHASE_STEP:
case CHASE_NOFOLLOW:
case CHASE_WARN:
arg_flags |= c;
break;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
if (optind == argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "At least one argument is required.");
return 1;
}
static int run(int argc, char **argv) {
int r;
log_setup_cli();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
for (int i = optind; i < argc; i++) {
_cleanup_free_ char *p = NULL;
_cleanup_close_ int fd = -1;
printf("%s ", argv[i]);
fflush(stdout);
r = chase_symlinks(argv[i], arg_root, arg_flags, &p, arg_open ? &fd : NULL);
if (r < 0)
log_error_errno(r, "failed: %m");
else {
log_info("→ %s", p);
if (arg_open)
assert(fd >= 0);
else
assert(fd == -1);
}
}
return 0;
}
DEFINE_MAIN_FUNCTION(run);
|
