/* * 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) * * Licensed under GPLv2, see file LICENSE in this tarball for details. */ #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("can't get current context"); if (compute_trans) { security_context_t file_context, new_context; if (getfilecon(command, &file_context) < 0) bb_error_msg_and_die("can't 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) MAIN_EXTERNALLY_VISIBLE; int runcon_main(int argc UNUSED_PARAM, 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("can't set up security context '%s'", context_str(con)); execvp(argv[0], argv); bb_perror_msg_and_die("can't execute '%s'", argv[0]); }