diff options
Diffstat (limited to 'src/firejail/git.c')
-rw-r--r-- | src/firejail/git.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/firejail/git.c b/src/firejail/git.c new file mode 100644 index 000000000..c4dd54a1b --- /dev/null +++ b/src/firejail/git.c | |||
@@ -0,0 +1,90 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2014-2017 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 | |||
21 | #ifdef HAVE_GIT_INSTALL | ||
22 | |||
23 | #include "firejail.h" | ||
24 | #include <sys/utsname.h> | ||
25 | #include <sched.h> | ||
26 | #include <sys/mount.h> | ||
27 | |||
28 | // install a very simple mount namespace sandbox with a tmpfs on top of /tmp | ||
29 | // and drop privileges | ||
30 | static void sbox_ns(void) { | ||
31 | if (unshare(CLONE_NEWNS) < 0) | ||
32 | errExit("unshare"); | ||
33 | |||
34 | // mount events are not forwarded between the host the sandbox | ||
35 | if (mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL) < 0) { | ||
36 | errExit("mount"); | ||
37 | } | ||
38 | |||
39 | // mount a tmpfs on top of /tmp | ||
40 | if (mount(NULL, "/tmp", "tmpfs", 0, NULL) < 0) | ||
41 | errExit("mount"); | ||
42 | |||
43 | |||
44 | // drop privileges | ||
45 | if (setgid(getgid()) < 0) | ||
46 | errExit("setgid/getgid"); | ||
47 | if (setuid(getuid()) < 0) | ||
48 | errExit("setuid/getuid"); | ||
49 | assert(getenv("LD_PRELOAD") == NULL); | ||
50 | |||
51 | printf("Running as "); fflush(0); | ||
52 | int rv = system("whoami"); | ||
53 | (void) rv; | ||
54 | printf("/tmp directory: "); fflush(0); | ||
55 | rv = system("ls -l /tmp"); | ||
56 | (void) rv; | ||
57 | } | ||
58 | |||
59 | |||
60 | void git_install(void) { | ||
61 | // redirect to "/usr/bin/firejail --noprofile --private-tmp /usr/lib/firejail/fgit-install.sh" | ||
62 | EUID_ASSERT(); | ||
63 | EUID_ROOT(); | ||
64 | |||
65 | // install a mount namespace with a tmpfs on top of /tmp | ||
66 | sbox_ns(); | ||
67 | |||
68 | // run command | ||
69 | const char *cmd = LIBDIR "/firejail/fgit-install.sh"; | ||
70 | int rv = system(cmd); | ||
71 | (void) rv; | ||
72 | exit(0); | ||
73 | } | ||
74 | |||
75 | void git_uninstall(void) { | ||
76 | // redirect to "/usr/bin/firejail --noprofile --private-tmp /usr/lib/firejail/fgit-install.sh" | ||
77 | EUID_ASSERT(); | ||
78 | EUID_ROOT(); | ||
79 | |||
80 | // install a mount namespace with a tmpfs on top of /tmp | ||
81 | sbox_ns(); | ||
82 | |||
83 | // run command | ||
84 | const char *cmd = LIBDIR "/firejail/fgit-uninstall.sh"; | ||
85 | int rv = system(cmd); | ||
86 | (void) rv; | ||
87 | exit(0); | ||
88 | } | ||
89 | |||
90 | #endif // HAVE_GIT_INSTALL | ||