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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-03-11 22:16:02 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-03-11 22:16:02 +0000
commit1203c9bf2f63938f7766a3022a9659b25712824f (patch)
tree162a5019d61ce2403466754ab0ee727e04f1563b /selinux/runcon.c
parentbaca1759129945fcd03d96ccc840892401b5a1af (diff)
downloadbusybox-1203c9bf2f63938f7766a3022a9659b25712824f.tar.gz
busybox-1203c9bf2f63938f7766a3022a9659b25712824f.tar.bz2
next portion of selinux updates: chcon, runcon. From
Yuichi Nakamura <himainu-ynakam@miomio.jp> KaiGai Kohei <busybox@kaigai.gr.jp>
Diffstat (limited to 'selinux/runcon.c')
-rw-r--r--selinux/runcon.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/selinux/runcon.c b/selinux/runcon.c
new file mode 100644
index 000000000..24e436feb
--- /dev/null
+++ b/selinux/runcon.c
@@ -0,0 +1,137 @@
+/*
+ * 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 "busybox.h"
+#include <getopt.h>
+#include <selinux/context.h>
+#include <selinux/flask.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 struct option runcon_options[] = {
+ { "user", 1, NULL, 'u' },
+ { "role", 1, NULL, 'r' },
+ { "type", 1, NULL, 't' },
+ { "range", 1, NULL, 'l' },
+ { "compute", 0, NULL, 'c' },
+ { "help", 0, NULL, 'h' },
+ { NULL, 0, NULL, 0 },
+};
+#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_options;
+#endif
+ opt_complementary = "-1";
+ opts = getopt32(argc, 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 found");
+ }
+
+ 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'", command);
+ return 1;
+}