diff options
Diffstat (limited to 'src/firejail/preproc.c')
-rw-r--r-- | src/firejail/preproc.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/firejail/preproc.c b/src/firejail/preproc.c new file mode 100644 index 000000000..6784ff5ac --- /dev/null +++ b/src/firejail/preproc.c | |||
@@ -0,0 +1,110 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2014-2016 Firejail Authors | ||
3 | * | ||
4 | * This file is part of firejail project | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | #include "firejail.h" | ||
21 | #include <sys/mount.h> | ||
22 | #include <sys/stat.h> | ||
23 | |||
24 | static int tmpfs_mounted = 0; | ||
25 | |||
26 | // build /run/firejail directory | ||
27 | void preproc_build_firejail_dir(void) { | ||
28 | struct stat s; | ||
29 | |||
30 | // CentOS 6 doesn't have /run directory | ||
31 | if (stat(RUN_FIREJAIL_BASEDIR, &s)) { | ||
32 | create_empty_dir_as_root(RUN_FIREJAIL_BASEDIR, 0755); | ||
33 | } | ||
34 | |||
35 | if (stat(RUN_FIREJAIL_DIR, &s)) { | ||
36 | create_empty_dir_as_root(RUN_FIREJAIL_DIR, 0755); | ||
37 | } | ||
38 | |||
39 | if (stat(RUN_FIREJAIL_NETWORK_DIR, &s)) { | ||
40 | create_empty_dir_as_root(RUN_FIREJAIL_NETWORK_DIR, 0755); | ||
41 | } | ||
42 | |||
43 | if (stat(RUN_FIREJAIL_BANDWIDTH_DIR, &s)) { | ||
44 | create_empty_dir_as_root(RUN_FIREJAIL_BANDWIDTH_DIR, 0755); | ||
45 | } | ||
46 | |||
47 | if (stat(RUN_FIREJAIL_NAME_DIR, &s)) { | ||
48 | create_empty_dir_as_root(RUN_FIREJAIL_NAME_DIR, 0755); | ||
49 | } | ||
50 | |||
51 | if (stat(RUN_FIREJAIL_X11_DIR, &s)) { | ||
52 | create_empty_dir_as_root(RUN_FIREJAIL_X11_DIR, 0755); | ||
53 | } | ||
54 | |||
55 | if (stat(RUN_FIREJAIL_APPIMAGE_DIR, &s)) { | ||
56 | create_empty_dir_as_root(RUN_FIREJAIL_APPIMAGE_DIR, 0755); | ||
57 | } | ||
58 | |||
59 | create_empty_file_as_root(RUN_RO_FILE, S_IRUSR); | ||
60 | create_empty_dir_as_root(RUN_RO_DIR, S_IRUSR); | ||
61 | } | ||
62 | |||
63 | // build /run/firejail/mnt directory | ||
64 | void preproc_mount_mnt_dir(void) { | ||
65 | struct stat s; | ||
66 | |||
67 | // mount tmpfs on top of /run/firejail/mnt | ||
68 | if (!tmpfs_mounted) { | ||
69 | if (arg_debug) | ||
70 | printf("Mounting tmpfs on %s directory\n", RUN_MNT_DIR); | ||
71 | if (mount("tmpfs", RUN_MNT_DIR, "tmpfs", MS_NOSUID | MS_STRICTATIME | MS_REC, "mode=755,gid=0") < 0) | ||
72 | errExit("mounting /run/firejail/mnt"); | ||
73 | tmpfs_mounted = 1; | ||
74 | fs_logger2("tmpfs", RUN_MNT_DIR); | ||
75 | } | ||
76 | } | ||
77 | |||
78 | // grab a copy of cp command | ||
79 | void preproc_build_cp_command(void) { | ||
80 | struct stat s; | ||
81 | preproc_mount_mnt_dir(); | ||
82 | if (stat(RUN_CP_COMMAND, &s)) { | ||
83 | char* fname = realpath("/bin/cp", NULL); | ||
84 | if (fname == NULL) { | ||
85 | fprintf(stderr, "Error: /bin/cp not found\n"); | ||
86 | exit(1); | ||
87 | } | ||
88 | if (stat(fname, &s)) { | ||
89 | fprintf(stderr, "Error: /bin/cp not found\n"); | ||
90 | exit(1); | ||
91 | } | ||
92 | if (is_link(fname)) { | ||
93 | fprintf(stderr, "Error: invalid /bin/cp file\n"); | ||
94 | exit(1); | ||
95 | } | ||
96 | int rv = copy_file(fname, RUN_CP_COMMAND, 0, 0, 0755); | ||
97 | if (rv) { | ||
98 | fprintf(stderr, "Error: cannot access /bin/cp\n"); | ||
99 | exit(1); | ||
100 | } | ||
101 | ASSERT_PERMS(RUN_CP_COMMAND, 0, 0, 0755); | ||
102 | |||
103 | free(fname); | ||
104 | } | ||
105 | } | ||
106 | |||
107 | // delete the temporary cp command | ||
108 | void preproc_delete_cp_command(void) { | ||
109 | unlink(RUN_CP_COMMAND); | ||
110 | } | ||