3 * ( [ -c ] [ -r role ] [-t type] [ -u user ] [ -l levelrange ] )
4 * command [arg1 [arg2 ...] ]
6 * attempt to run the specified command with the specified context.
8 * -r role : use the current context with the specified role
9 * -t type : use the current context with the specified type
10 * -u user : use the current context with the specified user
11 * -l level : use the current context with the specified level range
12 * -c : compute process transition context before modifying
14 * Contexts are interpreted as follows:
23 * 4 Y user:role:type:range
26 * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
27 * - based on coreutils-5.97 (in Fedora Core 6)
29 * Licensed under GPLv2, see file LICENSE in this source tree.
31 //config:config RUNCON
32 //config: bool "runcon"
34 //config: depends on SELINUX
36 //config: Enable support to run command in specified security context.
38 //config:config FEATURE_RUNCON_LONG_OPTIONS
39 //config: bool "Enable long options"
41 //config: depends on RUNCON && LONG_OPTS
43 //applet:IF_RUNCON(APPLET(runcon, BB_DIR_USR_BIN, BB_SUID_DROP))
45 //kbuild:lib-$(CONFIG_RUNCON) += runcon.o
47 //usage:#define runcon_trivial_usage
48 //usage: "[-c] [-u USER] [-r ROLE] [-t TYPE] [-l RANGE] PROG ARGS\n"
49 //usage: "runcon CONTEXT PROG ARGS"
50 //usage:#define runcon_full_usage "\n\n"
51 //usage: "Run PROG in a different security context\n"
52 //usage: "\n CONTEXT Complete security context\n"
53 //usage: IF_FEATURE_RUNCON_LONG_OPTIONS(
54 //usage: "\n -c,--compute Compute process transition context before modifying"
55 //usage: "\n -t,--type TYPE Type (for same role as parent)"
56 //usage: "\n -u,--user USER User identity"
57 //usage: "\n -r,--role ROLE Role"
58 //usage: "\n -l,--range RNG Levelrange"
60 //usage: IF_NOT_FEATURE_RUNCON_LONG_OPTIONS(
61 //usage: "\n -c Compute process transition context before modifying"
62 //usage: "\n -t TYPE Type (for same role as parent)"
63 //usage: "\n -u USER User identity"
64 //usage: "\n -r ROLE Role"
65 //usage: "\n -l RNG Levelrange"
68 #include <selinux/context.h>
69 /* from deprecated <selinux/flask.h>: */
70 #undef SECCLASS_PROCESS
71 #define SECCLASS_PROCESS 2
75 static context_t runcon_compute_new_context(char *user, char *role, char *type, char *range,
76 char *command, int compute_trans)
79 security_context_t cur_context;
81 if (getcon(&cur_context))
82 bb_error_msg_and_die("can't get current context");
85 security_context_t file_context, new_context;
87 if (getfilecon(command, &file_context) < 0)
88 bb_error_msg_and_die("can't retrieve attributes of '%s'",
90 if (security_compute_create(cur_context, file_context,
91 SECCLASS_PROCESS, &new_context))
92 bb_error_msg_and_die("unable to compute a new context");
93 cur_context = new_context;
96 con = context_new(cur_context);
98 bb_error_msg_and_die("'%s' is not a valid context", cur_context);
99 if (user && context_user_set(con, user))
100 bb_error_msg_and_die("can't set new user '%s'", user);
101 if (type && context_type_set(con, type))
102 bb_error_msg_and_die("can't set new type '%s'", type);
103 if (range && context_range_set(con, range))
104 bb_error_msg_and_die("can't set new range '%s'", range);
105 if (role && context_role_set(con, role))
106 bb_error_msg_and_die("can't set new role '%s'", role);
111 #if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
112 static const char runcon_longopts[] ALIGN1 =
113 "user\0" Required_argument "u"
114 "role\0" Required_argument "r"
115 "type\0" Required_argument "t"
116 "range\0" Required_argument "l"
117 "compute\0" No_argument "c"
118 "help\0" No_argument "h"
122 #define OPTS_ROLE (1<<0) /* r */
123 #define OPTS_TYPE (1<<1) /* t */
124 #define OPTS_USER (1<<2) /* u */
125 #define OPTS_RANGE (1<<3) /* l */
126 #define OPTS_COMPUTE (1<<4) /* c */
127 #define OPTS_HELP (1<<5) /* h */
128 #define OPTS_CONTEXT_COMPONENT (OPTS_ROLE | OPTS_TYPE | OPTS_USER | OPTS_RANGE)
130 int runcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
131 int runcon_main(int argc UNUSED_PARAM, char **argv)
137 char *context = NULL;
143 #if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
144 applet_long_options = runcon_longopts;
146 opt_complementary = "-1";
147 opts = getopt32(argv, "r:t:u:l:ch", &role, &type, &user, &range);
150 if (!(opts & OPTS_CONTEXT_COMPONENT)) {
153 bb_error_msg_and_die("no command given");
157 con = context_new(context);
159 bb_error_msg_and_die("'%s' is not a valid context", context);
161 con = runcon_compute_new_context(user, role, type, range,
162 argv[0], opts & OPTS_COMPUTE);
165 if (security_check_context(context_str(con)))
166 bb_error_msg_and_die("'%s' is not a valid context",
169 if (setexeccon(context_str(con)))
170 bb_error_msg_and_die("can't set up security context '%s'",
173 BB_EXECVP_or_die(argv);