Busybox: Upgrade to 1.21.1 (stable). lsof active.
[tomato.git] / release / src / router / busybox / selinux / runcon.c
blob27f2be3a90809c7a12ea2935d44e5e84dd03e80d
1 /*
2 * runcon [ context |
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:
16 * Number of MLS
17 * components system?
19 * 1 - type
20 * 2 - role:type
21 * 3 Y role:type:range
22 * 3 N user:role:type
23 * 4 Y user:role:type:range
24 * 4 N error
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.
32 //usage:#define runcon_trivial_usage
33 //usage: "[-c] [-u USER] [-r ROLE] [-t TYPE] [-l RANGE] PROG ARGS\n"
34 //usage: "runcon CONTEXT PROG ARGS"
35 //usage:#define runcon_full_usage "\n\n"
36 //usage: "Run PROG in a different security context\n"
37 //usage: "\n CONTEXT Complete security context\n"
38 //usage: IF_FEATURE_RUNCON_LONG_OPTIONS(
39 //usage: "\n -c,--compute Compute process transition context before modifying"
40 //usage: "\n -t,--type=TYPE Type (for same role as parent)"
41 //usage: "\n -u,--user=USER User identity"
42 //usage: "\n -r,--role=ROLE Role"
43 //usage: "\n -l,--range=RNG Levelrange"
44 //usage: )
45 //usage: IF_NOT_FEATURE_RUNCON_LONG_OPTIONS(
46 //usage: "\n -c Compute process transition context before modifying"
47 //usage: "\n -t TYPE Type (for same role as parent)"
48 //usage: "\n -u USER User identity"
49 //usage: "\n -r ROLE Role"
50 //usage: "\n -l RNG Levelrange"
51 //usage: )
53 #include <selinux/context.h>
54 #include <selinux/flask.h>
56 #include "libbb.h"
58 static context_t runcon_compute_new_context(char *user, char *role, char *type, char *range,
59 char *command, int compute_trans)
61 context_t con;
62 security_context_t cur_context;
64 if (getcon(&cur_context))
65 bb_error_msg_and_die("can't get current context");
67 if (compute_trans) {
68 security_context_t file_context, new_context;
70 if (getfilecon(command, &file_context) < 0)
71 bb_error_msg_and_die("can't retrieve attributes of '%s'",
72 command);
73 if (security_compute_create(cur_context, file_context,
74 SECCLASS_PROCESS, &new_context))
75 bb_error_msg_and_die("unable to compute a new context");
76 cur_context = new_context;
79 con = context_new(cur_context);
80 if (!con)
81 bb_error_msg_and_die("'%s' is not a valid context", cur_context);
82 if (user && context_user_set(con, user))
83 bb_error_msg_and_die("can't set new user '%s'", user);
84 if (type && context_type_set(con, type))
85 bb_error_msg_and_die("can't set new type '%s'", type);
86 if (range && context_range_set(con, range))
87 bb_error_msg_and_die("can't set new range '%s'", range);
88 if (role && context_role_set(con, role))
89 bb_error_msg_and_die("can't set new role '%s'", role);
91 return con;
94 #if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
95 static const char runcon_longopts[] ALIGN1 =
96 "user\0" Required_argument "u"
97 "role\0" Required_argument "r"
98 "type\0" Required_argument "t"
99 "range\0" Required_argument "l"
100 "compute\0" No_argument "c"
101 "help\0" No_argument "h"
103 #endif
105 #define OPTS_ROLE (1<<0) /* r */
106 #define OPTS_TYPE (1<<1) /* t */
107 #define OPTS_USER (1<<2) /* u */
108 #define OPTS_RANGE (1<<3) /* l */
109 #define OPTS_COMPUTE (1<<4) /* c */
110 #define OPTS_HELP (1<<5) /* h */
111 #define OPTS_CONTEXT_COMPONENT (OPTS_ROLE | OPTS_TYPE | OPTS_USER | OPTS_RANGE)
113 int runcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
114 int runcon_main(int argc UNUSED_PARAM, char **argv)
116 char *role = NULL;
117 char *range = NULL;
118 char *user = NULL;
119 char *type = NULL;
120 char *context = NULL;
121 unsigned opts;
122 context_t con;
124 selinux_or_die();
126 #if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
127 applet_long_options = runcon_longopts;
128 #endif
129 opt_complementary = "-1";
130 opts = getopt32(argv, "r:t:u:l:ch", &role, &type, &user, &range);
131 argv += optind;
133 if (!(opts & OPTS_CONTEXT_COMPONENT)) {
134 context = *argv++;
135 if (!argv[0])
136 bb_error_msg_and_die("no command given");
139 if (context) {
140 con = context_new(context);
141 if (!con)
142 bb_error_msg_and_die("'%s' is not a valid context", context);
143 } else {
144 con = runcon_compute_new_context(user, role, type, range,
145 argv[0], opts & OPTS_COMPUTE);
148 if (security_check_context(context_str(con)))
149 bb_error_msg_and_die("'%s' is not a valid context",
150 context_str(con));
152 if (setexeccon(context_str(con)))
153 bb_error_msg_and_die("can't set up security context '%s'",
154 context_str(con));
156 BB_EXECVP_or_die(argv);