mirror of
https://github.com/sheumann/hush.git
synced 2024-08-16 09:29:16 +00:00
(add/remove: 0/0 grow/shrink: 12/131 up/down: 91/-727) Total: -636 bytes text data bss dec hex filename 773469 1058 11092 785619 bfcd3 busybox_old 772644 1058 11092 784794 bf99a busybox_unstripped
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
|
|
* runcon [ context |
|
|
* ( [ -c ] [ -r role ] [-t type] [ -u user ] [ -l levelrange ] )
|
|
* command [arg1 [arg2 ...] ]
|
|
*
|
|
* attempt to run the specified command with the specified context.
|
|
*
|
|
* -r role : use the current context with the specified role
|
|
* -t type : use the current context with the specified type
|
|
* -u user : use the current context with the specified user
|
|
* -l level : use the current context with the specified level range
|
|
* -c : compute process transition context before modifying
|
|
*
|
|
* Contexts are interpreted as follows:
|
|
*
|
|
* Number of MLS
|
|
* components system?
|
|
*
|
|
* 1 - type
|
|
* 2 - role:type
|
|
* 3 Y role:type:range
|
|
* 3 N user:role:type
|
|
* 4 Y user:role:type:range
|
|
* 4 N error
|
|
*
|
|
* Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
|
|
* - based on coreutils-5.97 (in Fedora Core 6)
|
|
*/
|
|
#include <getopt.h>
|
|
#include <selinux/context.h>
|
|
#include <selinux/flask.h>
|
|
|
|
#include "libbb.h"
|
|
|
|
static context_t runcon_compute_new_context(char *user, char *role, char *type, char *range,
|
|
char *command, int compute_trans)
|
|
{
|
|
context_t con;
|
|
security_context_t cur_context;
|
|
|
|
if (getcon(&cur_context))
|
|
bb_error_msg_and_die("cannot get current context");
|
|
|
|
if (compute_trans) {
|
|
security_context_t file_context, new_context;
|
|
|
|
if (getfilecon(command, &file_context) < 0)
|
|
bb_error_msg_and_die("cannot retrieve attributes of '%s'",
|
|
command);
|
|
if (security_compute_create(cur_context, file_context,
|
|
SECCLASS_PROCESS, &new_context))
|
|
bb_error_msg_and_die("unable to compute a new context");
|
|
cur_context = new_context;
|
|
}
|
|
|
|
con = context_new(cur_context);
|
|
if (!con)
|
|
bb_error_msg_and_die("'%s' is not a valid context", cur_context);
|
|
if (user && context_user_set(con, user))
|
|
bb_error_msg_and_die("failed to set new user '%s'", user);
|
|
if (type && context_type_set(con, type))
|
|
bb_error_msg_and_die("failed to set new type '%s'", type);
|
|
if (range && context_range_set(con, range))
|
|
bb_error_msg_and_die("failed to set new range '%s'", range);
|
|
if (role && context_role_set(con, role))
|
|
bb_error_msg_and_die("failed to set new role '%s'", role);
|
|
|
|
return con;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
|
|
static const char runcon_longopts[] ALIGN1 =
|
|
"user\0" Required_argument "u"
|
|
"role\0" Required_argument "r"
|
|
"type\0" Required_argument "t"
|
|
"range\0" Required_argument "l"
|
|
"compute\0" No_argument "c"
|
|
"help\0" No_argument "h"
|
|
;
|
|
#endif
|
|
|
|
#define OPTS_ROLE (1<<0) /* r */
|
|
#define OPTS_TYPE (1<<1) /* t */
|
|
#define OPTS_USER (1<<2) /* u */
|
|
#define OPTS_RANGE (1<<3) /* l */
|
|
#define OPTS_COMPUTE (1<<4) /* c */
|
|
#define OPTS_HELP (1<<5) /* h */
|
|
#define OPTS_CONTEXT_COMPONENT (OPTS_ROLE | OPTS_TYPE | OPTS_USER | OPTS_RANGE)
|
|
|
|
int runcon_main(int argc, char **argv);
|
|
int runcon_main(int argc, char **argv)
|
|
{
|
|
char *role = NULL;
|
|
char *range = NULL;
|
|
char *user = NULL;
|
|
char *type = NULL;
|
|
char *context = NULL;
|
|
unsigned opts;
|
|
context_t con;
|
|
|
|
selinux_or_die();
|
|
|
|
#if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
|
|
applet_long_options = runcon_longopts;
|
|
#endif
|
|
opt_complementary = "-1";
|
|
opts = getopt32(argv, "r:t:u:l:ch", &role, &type, &user, &range);
|
|
argv += optind;
|
|
|
|
if (!(opts & OPTS_CONTEXT_COMPONENT)) {
|
|
context = *argv++;
|
|
if (!argv[0])
|
|
bb_error_msg_and_die("no command given");
|
|
}
|
|
|
|
if (context) {
|
|
con = context_new(context);
|
|
if (!con)
|
|
bb_error_msg_and_die("'%s' is not a valid context", context);
|
|
} else {
|
|
con = runcon_compute_new_context(user, role, type, range,
|
|
argv[0], opts & OPTS_COMPUTE);
|
|
}
|
|
|
|
if (security_check_context(context_str(con)))
|
|
bb_error_msg_and_die("'%s' is not a valid context",
|
|
context_str(con));
|
|
|
|
if (setexeccon(context_str(con)))
|
|
bb_error_msg_and_die("cannot set up security context '%s'",
|
|
context_str(con));
|
|
|
|
execvp(argv[0], argv);
|
|
|
|
bb_perror_msg_and_die("cannot execute '%s'", argv[0]);
|
|
}
|