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Commits
04fcb33d
Commit
04fcb33d
authored
Dec 30, 2016
by
topjohnwu
Browse files
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Plain Diff
Fix app request issue
parent
f31d2486
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Showing
3 changed files
with
42 additions
and
158 deletions
+42
-158
daemon.c
daemon.c
+0
-121
su.c
su.c
+21
-16
su.h
su.h
+21
-21
No files found.
daemon.c
View file @
04fcb33d
...
...
@@ -444,133 +444,12 @@ static int daemon_accept(int fd) {
return
run_daemon_child
(
infd
,
outfd
,
errfd
,
argc
,
argv
);
}
static
int
copy_file
(
const
char
*
src
,
const
char
*
dst
,
int
mode
)
{
int
ifd
=
open
(
src
,
O_RDONLY
);
if
(
ifd
<
0
)
return
1
;
if
(
mode
==
0
)
{
struct
stat
stbuf
;
if
(
fstat
(
ifd
,
&
stbuf
))
return
1
;
mode
=
stbuf
.
st_mode
&
0777
;
LOGE
(
"File %s found mode %o"
,
src
,
mode
);
}
int
ofd
=
open
(
dst
,
O_WRONLY
|
O_CREAT
,
mode
);
if
(
ofd
<
0
)
return
1
;
size_t
s
=
lseek
(
ifd
,
0
,
SEEK_END
);
if
(
s
<
0
)
return
1
;
lseek
(
ifd
,
0
,
SEEK_SET
);
int
ret
=
sendfile
(
ofd
,
ifd
,
NULL
,
s
);
if
(
ret
<
0
)
return
1
;
close
(
ofd
);
close
(
ifd
);
return
0
;
}
static
void
prepare_su_bind
()
{
int
ret
=
0
;
//Check if there is a use to mount bind
if
(
access
(
"/system/xbin/su"
,
R_OK
)
!=
0
)
return
;
ret
=
copy_file
(
"/sbin/su"
,
"/dev/su/su"
,
0755
);
if
(
ret
)
{
PLOGE
(
"Failed to copy su"
);
return
;
}
chmod
(
"/dev/su/su"
,
0755
);
ret
=
setfilecon
(
"/dev/su/su"
,
"u:object_r:system_file:s0"
);
if
(
ret
)
{
LOGE
(
"Failed to set file context"
);
return
;
}
ret
=
mount
(
"/dev/su/su"
,
"/system/xbin/su"
,
""
,
MS_BIND
,
NULL
);
if
(
ret
)
{
LOGE
(
"Failed to mount bind"
);
return
;
}
}
static
void
bind_cb_func
(
void
*
arg
,
int
uid
,
const
char
*
src
,
const
char
*
dst
)
{
int
ret
=
0
,
i
=
0
;
char
*
tmpfile
=
NULL
;
asprintf
(
&
tmpfile
,
"/dev/su/bind%d"
,
i
++
);
struct
stat
stbuf
;
ret
=
stat
(
src
,
&
stbuf
);
if
(
ret
)
{
free
(
tmpfile
);
LOGE
(
"Failed to stat src %s file"
,
src
);
return
;
}
//Only shell uid is allowed to bind files not his own
if
(
uid
!=
2000
&&
uid
!=
stbuf
.
st_uid
)
{
LOGE
(
"File %s has wrong owner: %d vs %d"
,
src
,
uid
,
stbuf
.
st_uid
);
return
;
}
ret
=
copy_file
(
src
,
tmpfile
,
0
);
if
(
ret
)
{
free
(
tmpfile
);
PLOGE
(
"Failed to copy su"
);
return
;
}
chmod
(
tmpfile
,
stbuf
.
st_mode
);
ret
=
setfilecon
(
tmpfile
,
"u:object_r:system_file:s0"
);
if
(
ret
)
{
LOGE
(
"Failed to set file context"
);
return
;
}
ret
=
mount
(
tmpfile
,
dst
,
""
,
MS_BIND
,
NULL
);
if
(
ret
)
{
LOGE
(
"Failed to mount bind"
);
return
;
}
}
static
void
init_cb_func
(
void
*
arg
,
int
uid
,
const
char
*
path
)
{
int
ret
=
0
;
int
p
=
fork
();
if
(
p
)
return
;
while
(
access
(
"/system/bin/sh"
,
R_OK
))
sleep
(
1
);
ret
=
setexeccon
(
"u:r:su:s0"
);
execl
(
path
,
path
,
NULL
);
LOGE
(
"Failed to execute %s. Trying as shell script, ret = %d"
,
path
,
ret
);
ret
=
setexeccon
(
"u:r:su:s0"
);
execl
(
"/system/bin/sh"
,
"/system/bin/sh"
,
path
,
NULL
);
LOGE
(
"Failed to execute %s as shell script"
,
path
);
_exit
(
1
);
}
static
void
prepare
()
{
setfscreatecon
(
"u:object_r:su_daemon:s0"
);
mkdir
(
"/dev/su"
,
0700
);
prepare_su_bind
();
setfscreatecon
(
NULL
);
}
int
run_daemon
()
{
if
(
getuid
()
!=
0
||
getgid
()
!=
0
)
{
PLOGE
(
"daemon requires root. uid/gid not root"
);
return
-
1
;
}
prepare
();
switch
(
fork
())
{
case
0
:
break
;
...
...
su.c
View file @
04fcb33d
...
...
@@ -562,10 +562,10 @@ static __attribute__ ((noreturn)) void allow(struct su_context *ctx) {
arg0
,
PARG
(
0
),
PARG
(
1
),
PARG
(
2
),
PARG
(
3
),
PARG
(
4
),
PARG
(
5
),
(
ctx
->
to
.
optind
+
6
<
ctx
->
to
.
argc
)
?
" ..."
:
""
);
if
(
ctx
->
to
.
context
&&
strcmp
(
ctx
->
to
.
context
,
"u:r:su_light:s0"
)
==
0
)
{
setexeccon
(
ctx
->
to
.
context
);
}
else
{
setexeccon
(
"u:r:su:s0"
);
if
(
ctx
->
to
.
context
&&
strcmp
(
ctx
->
to
.
context
,
"u:r:su_light:s0"
)
==
0
)
{
setexeccon
(
ctx
->
to
.
context
);
}
else
{
setexeccon
(
"u:r:su:s0"
);
}
ctx
->
to
.
argv
[
--
argc
]
=
arg0
;
...
...
@@ -610,7 +610,7 @@ static void fork_for_samsung(void)
int
main
(
int
argc
,
char
*
argv
[])
{
if
(
argc
==
2
&&
strcmp
(
argv
[
1
],
"--daemon"
)
==
0
)
{
//Everything we'll exec will be in su, not su_daemon
setexeccon
(
"u:r:su:s0"
);
setexeccon
(
"u:r:su:s0"
);
return
run_daemon
();
}
return
su_main
(
argc
,
argv
);
...
...
@@ -618,15 +618,15 @@ int main(int argc, char *argv[]) {
int
su_main
(
int
argc
,
char
*
argv
[])
{
int
ppid
=
getppid
();
if
((
geteuid
()
!=
AID_ROOT
&&
getuid
()
!=
AID_ROOT
)
||
(
get_api_version
()
>=
18
&&
getuid
()
==
AID_SHELL
)
||
get_api_version
()
>=
19
)
{
// attempt to connect to daemon...
LOGD
(
"starting daemon client %d %d"
,
getuid
(),
geteuid
());
return
connect_daemon
(
argc
,
argv
,
ppid
);
}
else
{
return
su_main_nodaemon
(
argc
,
argv
);
}
if
((
geteuid
()
!=
AID_ROOT
&&
getuid
()
!=
AID_ROOT
)
||
(
get_api_version
()
>=
18
&&
getuid
()
==
AID_SHELL
)
||
get_api_version
()
>=
19
)
{
// attempt to connect to daemon...
LOGD
(
"starting daemon client %d %d"
,
getuid
(),
geteuid
());
return
connect_daemon
(
argc
,
argv
,
ppid
);
}
else
{
return
su_main_nodaemon
(
argc
,
argv
);
}
}
...
...
@@ -700,7 +700,7 @@ int su_main_nodaemon(int argc, char **argv) {
.
keepenv
=
0
,
.
shell
=
NULL
,
.
command
=
NULL
,
.
context
=
NULL
,
.
context
=
NULL
,
.
argv
=
argv
,
.
argc
=
argc
,
.
optind
=
0
,
...
...
@@ -712,6 +712,11 @@ int su_main_nodaemon(int argc, char **argv) {
.
database_path
=
REQUESTOR_DATA_PATH
REQUESTOR_DATABASE_PATH
,
.
base_path
=
REQUESTOR_DATA_PATH
REQUESTOR
},
.
bind
=
{
.
from
=
""
,
.
to
=
""
,
},
.
init
=
""
,
};
struct
stat
st
;
int
c
,
socket_serv_fd
,
fd
;
...
...
@@ -751,7 +756,7 @@ int su_main_nodaemon(int argc, char **argv) {
printf
(
"%d
\n
"
,
VERSION_CODE
);
exit
(
EXIT_SUCCESS
);
case
'v'
:
printf
(
"%s
(topjohnwu v1)
\n
"
,
VERSION
);
printf
(
"%s
\n
"
,
VERSION
);
exit
(
EXIT_SUCCESS
);
case
'u'
:
switch
(
get_multiuser_mode
())
{
...
...
su.h
View file @
04fcb33d
...
...
@@ -79,7 +79,7 @@
#ifndef VERSION_CODE
#define VERSION_CODE 1
#endif
#define VERSION
xstr(VERSION_CODE) " " REQUESTOR
#define VERSION
REQUESTOR " topjohnwu r" xstr(VERSION_CODE)
#define PROTO_VERSION 1
...
...
@@ -98,7 +98,7 @@ struct su_request {
int
login
;
int
keepenv
;
char
*
shell
;
char
*
context
;
char
*
context
;
char
*
command
;
char
**
argv
;
int
argc
;
...
...
@@ -123,29 +123,29 @@ struct su_user_info {
};
struct
su_bind
{
const
char
*
from
;
const
char
*
to
;
const
char
*
from
;
const
char
*
to
;
};
struct
su_context
{
struct
su_initiator
from
;
struct
su_request
to
;
struct
su_user_info
user
;
struct
su_bind
bind
;
const
char
*
init
;
struct
su_bind
bind
;
const
char
*
init
;
mode_t
umask
;
char
sock_path
[
PATH_MAX
];
};
// multiuser su behavior
typedef
enum
{
// only owner can su
MULTIUSER_MODE_OWNER_ONLY
=
0
,
// owner gets a su prompt
MULTIUSER_MODE_OWNER_MANAGED
=
1
,
// user gets a su prompt
MULTIUSER_MODE_USER
=
2
,
MULTIUSER_MODE_NONE
=
3
,
// only owner can su
MULTIUSER_MODE_OWNER_ONLY
=
0
,
// owner gets a su prompt
MULTIUSER_MODE_OWNER_MANAGED
=
1
,
// user gets a su prompt
MULTIUSER_MODE_USER
=
2
,
MULTIUSER_MODE_NONE
=
3
,
}
multiuser_mode_t
;
#define MULTIUSER_VALUE_OWNER_ONLY "owner"
...
...
@@ -166,14 +166,14 @@ extern int send_result(struct su_context *ctx, policy_t policy);
static
inline
char
*
get_command
(
const
struct
su_request
*
to
)
{
if
(
to
->
command
)
return
to
->
command
;
if
(
to
->
shell
)
return
to
->
shell
;
char
*
ret
=
to
->
argv
[
to
->
optind
];
if
(
ret
)
return
ret
;
return
DEFAULT_SHELL
;
if
(
to
->
command
)
return
to
->
command
;
if
(
to
->
shell
)
return
to
->
shell
;
char
*
ret
=
to
->
argv
[
to
->
optind
];
if
(
ret
)
return
ret
;
return
DEFAULT_SHELL
;
}
void
exec_loge
(
const
char
*
fmt
,
...);
...
...
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