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
|
/* mkfifo -- make fifo's (named pipes)
Copyright (C) 1990-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* David MacKenzie <djm@ai.mit.edu> */
#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include <selinux/label.h>
#include "system.h"
#include "modechange.h"
#include "quote.h"
#include "selinux.h"
#include "smack.h"
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "mkfifo"
#define AUTHORS proper_name ("David MacKenzie")
static struct option const longopts[] =
{
{GETOPT_SELINUX_CONTEXT_OPTION_DECL},
{"mode", required_argument, nullptr, 'm'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{nullptr, 0, nullptr, 0}
};
void
usage (int status)
{
if (status != EXIT_SUCCESS)
emit_try_help ();
else
{
printf (_("Usage: %s [OPTION]... NAME...\n"), program_name);
fputs (_("\
Create named pipes (FIFOs) with the given NAMEs.\n\
"), stdout);
emit_mandatory_arg_note ();
fputs (_("\
-m, --mode=MODE set file permission bits to MODE, not a=rw - umask\n\
"), stdout);
fputs (_("\
-Z set the SELinux security context to default type\n\
--context[=CTX] like -Z, or if CTX is specified then set the SELinux\n\
or SMACK security context to CTX\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
emit_ancillary_info (PROGRAM_NAME);
}
exit (status);
}
int
main (int argc, char **argv)
{
mode_t newmode;
char const *specified_mode = nullptr;
int exit_status = EXIT_SUCCESS;
int optc;
char const *scontext = nullptr;
struct selabel_handle *set_security_context = nullptr;
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
while ((optc = getopt_long (argc, argv, "m:Z", longopts, nullptr)) != -1)
{
switch (optc)
{
case 'm':
specified_mode = optarg;
break;
case 'Z':
if (is_smack_enabled ())
{
/* We don't yet support -Z to restore context with SMACK. */
scontext = optarg;
}
else if (is_selinux_enabled () > 0)
{
if (optarg)
scontext = optarg;
else
{
set_security_context = selabel_open (SELABEL_CTX_FILE,
nullptr, 0);
if (! set_security_context)
error (0, errno, _("warning: ignoring --context"));
}
}
else if (optarg)
{
error (0, 0,
_("warning: ignoring --context; "
"it requires an SELinux/SMACK-enabled kernel"));
}
break;
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
default:
usage (EXIT_FAILURE);
}
}
if (optind == argc)
{
error (0, 0, _("missing operand"));
usage (EXIT_FAILURE);
}
if (scontext)
{
int ret = 0;
if (is_smack_enabled ())
ret = smack_set_label_for_self (scontext);
else
ret = setfscreatecon (scontext);
if (ret < 0)
error (EXIT_FAILURE, errno,
_("failed to set default file creation context to %s"),
quote (scontext));
}
newmode = MODE_RW_UGO;
if (specified_mode)
{
mode_t umask_value;
struct mode_change *change = mode_compile (specified_mode);
if (!change)
error (EXIT_FAILURE, 0, _("invalid mode"));
umask_value = umask (0);
umask (umask_value);
newmode = mode_adjust (newmode, false, umask_value, change, nullptr);
free (change);
if (newmode & ~S_IRWXUGO)
error (EXIT_FAILURE, 0,
_("mode must specify only file permission bits"));
}
for (; optind < argc; ++optind)
{
if (set_security_context)
defaultcon (set_security_context, argv[optind], S_IFIFO);
if (mkfifo (argv[optind], newmode) != 0)
{
error (0, errno, _("cannot create fifo %s"), quoteaf (argv[optind]));
exit_status = EXIT_FAILURE;
}
else if (specified_mode && lchmod (argv[optind], newmode) != 0)
{
error (0, errno, _("cannot set permissions of %s"),
quoteaf (argv[optind]));
exit_status = EXIT_FAILURE;
}
}
return exit_status;
}
|
