int sestatus_main(int argc, char **argv)
{
unsigned opts;
const char *pol_path;
int rc;
opt_complementary = "?0"; /* no arguments are required. */
opts = getopt32(argv, "vb");
/* SELinux status: line */
rc = is_selinux_enabled();
if (rc < 0)
goto error;
printf(COL_FMT "%s\n", "SELinux status:",
rc == 1 ? "enabled" : "disabled");
/* SELinuxfs mount: line */
if (!selinux_mnt)
goto error;
printf(COL_FMT "%s\n", "SELinuxfs mount:",
selinux_mnt);
/* Current mode: line */
rc = security_getenforce();
if (rc < 0)
goto error;
printf(COL_FMT "%s\n", "Current mode:",
rc == 0 ? "permissive" : "enforcing");
/* Mode from config file: line */
if (selinux_getenforcemode(&rc) != 0)
goto error;
printf(COL_FMT "%s\n", "Mode from config file:",
rc < 0 ? "disabled" : (rc == 0 ? "permissive" : "enforcing"));
/* Policy version: line */
rc = security_policyvers();
if (rc < 0)
goto error;
printf(COL_FMT "%u\n", "Policy version:", rc);
/* Policy from config file: line */
pol_path = selinux_policy_root();
if (!pol_path)
goto error;
printf(COL_FMT "%s\n", "Policy from config file:",
bb_basename(pol_path));
if (opts & OPT_BOOLEAN)
display_boolean();
if (opts & OPT_VERBOSE)
display_verbose();
return 0;
error:
bb_perror_msg_and_die("libselinux returns unknown state");
}
int main(int argc, char **argv)
{
/* these vars are reused several times */
int rc, opt, i, c;
char *context, *root_path;
/* files that need context checks */
char *fc[MAX_CHECK];
char *cterm = ttyname(0);
int nfc = 0;
struct stat m;
/* processes that need context checks */
char *pc[MAX_CHECK];
int npc = 0;
/* booleans */
char **bools;
int nbool;
int verbose = 0;
int show_bools = 0;
/* policy */
const char *pol_name, *root_dir;
char *pol_path;
while (1) {
opt = getopt(argc, argv, "vb");
if (opt == -1)
break;
switch (opt) {
case 'v':
verbose = 1;
break;
case 'b':
show_bools = 1;
break;
default:
/* invalid option */
printf("\nUsage: %s [OPTION]\n\n", basename(argv[0]));
printf(" -v Verbose check of process and file contexts.\n");
printf(" -b Display current state of booleans.\n");
printf("\nWithout options, show SELinux status.\n");
return -1;
}
}
printf_tab("SELinux status:");
rc = is_selinux_enabled();
switch (rc) {
case 1:
printf("enabled\n");
break;
case 0:
printf("disabled\n");
return 0;
break;
default:
printf("unknown (%s)\n", strerror(errno));
return 0;
break;
}
printf_tab("SELinuxfs mount:");
if (selinux_mnt != NULL) {
printf("%s\n", selinux_mnt);
} else {
printf("not mounted\n\n");
printf("Please mount selinuxfs for proper results.\n");
return -1;
}
printf_tab("SELinux root directory:");
root_dir = selinux_path();
if (root_dir == NULL) {
printf("error (%s)\n", strerror(errno));
return -1;
}
/* The path has a trailing '/' so duplicate to edit */
root_path = strdup(root_dir);
if (!root_path) {
printf("malloc error (%s)\n", strerror(errno));
return -1;
}
/* actually blank the '/' */
root_path[strlen(root_path) - 1] = '\0';
printf("%s\n", root_path);
free(root_path);
/* Dump all the path information */
printf_tab("Loaded policy name:");
pol_path = strdup(selinux_policy_root());
if (pol_path) {
pol_name = basename(pol_path);
puts(pol_name);
free(pol_path);
} else {
printf("error (%s)\n", strerror(errno));
}
printf_tab("Current mode:");
rc = security_getenforce();
switch (rc) {
case 1:
printf("enforcing\n");
break;
case 0:
printf("permissive\n");
break;
default:
printf("unknown (%s)\n", strerror(errno));
break;
}
printf_tab("Mode from config file:");
if (selinux_getenforcemode(&rc) == 0) {
switch (rc) {
case 1:
printf("enforcing\n");
break;
case 0:
printf("permissive\n");
break;
case -1:
printf("disabled\n");
break;
}
} else {
printf("error (%s)\n", strerror(errno));
}
printf_tab("Policy MLS status:");
rc = is_selinux_mls_enabled();
switch (rc) {
case 0:
printf("disabled\n");
break;
case 1:
printf("enabled\n");
break;
default:
printf("error (%s)\n", strerror(errno));
break;
}
printf_tab("Policy deny_unknown status:");
rc = security_deny_unknown();
switch (rc) {
case 0:
printf("allowed\n");
break;
case 1:
printf("denied\n");
break;
default:
printf("error (%s)\n", strerror(errno));
break;
}
rc = security_policyvers();
printf_tab("Max kernel policy version:");
if (rc < 0)
printf("unknown (%s)\n", strerror(errno));
else
printf("%d\n", rc);
if (show_bools) {
/* show booleans */
if (security_get_boolean_names(&bools, &nbool) >= 0) {
printf("\nPolicy booleans:\n");
for (i = 0; i < nbool; i++) {
if (strlen(bools[i]) + 1 > COL)
COL = strlen(bools[i]) + 1;
}
for (i = 0; i < nbool; i++) {
printf_tab(bools[i]);
rc = security_get_boolean_active(bools[i]);
switch (rc) {
case 1:
printf("on");
break;
case 0:
printf("off");
break;
default:
printf("unknown (%s)", strerror(errno));
break;
}
c = security_get_boolean_pending(bools[i]);
if (c != rc)
switch (c) {
case 1:
printf(" (activate pending)");
break;
case 0:
printf(" (inactivate pending)");
break;
default:
printf(" (pending error: %s)",
strerror(errno));
break;
}
printf("\n");
/* free up the booleans */
free(bools[i]);
}
free(bools);
}
}
/* only show contexts if -v is given */
if (!verbose)
return 0;
load_checks(pc, &npc, fc, &nfc);
printf("\nProcess contexts:\n");
printf_tab("Current context:");
if (getcon(&context) >= 0) {
printf("%s\n", context);
freecon(context);
} else
printf("unknown (%s)\n", strerror(errno));
printf_tab("Init context:");
if (getpidcon(1, &context) >= 0) {
printf("%s\n", context);
freecon(context);
} else
printf("unknown (%s)\n", strerror(errno));
for (i = 0; i < npc; i++) {
rc = pidof(pc[i]);
if (rc > 0) {
if (getpidcon(rc, &context) < 0)
continue;
printf_tab(pc[i]);
printf("%s\n", context);
freecon(context);
}
}
printf("\nFile contexts:\n");
/* controlling term */
printf_tab("Controlling terminal:");
if (lgetfilecon(cterm, &context) >= 0) {
printf("%s\n", context);
freecon(context);
} else {
printf("unknown (%s)\n", strerror(errno));
}
for (i = 0; i < nfc; i++) {
if (lgetfilecon(fc[i], &context) >= 0) {
printf_tab(fc[i]);
/* check if this is a symlink */
if (lstat(fc[i], &m)) {
printf
("%s (could not check link status (%s)!)\n",
context, strerror(errno));
freecon(context);
continue;
}
if (S_ISLNK(m.st_mode)) {
/* print link target context */
printf("%s -> ", context);
freecon(context);
if (getfilecon(fc[i], &context) >= 0) {
printf("%s\n", context);
freecon(context);
} else {
printf("unknown (%s)\n",
strerror(errno));
}
} else {
printf("%s\n", context);
freecon(context);
}
}
}
return 0;
}
/*
* Mount point for selinuxfs.
* This definition is private to the function below.
* Everything else uses the location determined during
* libselinux startup via /proc/mounts (see init_selinuxmnt).
* We only need the hardcoded definition for the initial mount
* required for the initial policy load.
*/
int selinux_init_load_policy(int *enforce)
{
int rc = 0, orig_enforce = 0, seconfig = -2, secmdline = -1;
FILE *cfg;
char *buf;
/*
* Reread the selinux configuration in case it has changed.
* Example: Caller has chroot'd and is now loading policy from
* chroot'd environment.
*/
selinux_reset_config();
/*
* Get desired mode (disabled, permissive, enforcing) from
* /etc/selinux/config.
*/
selinux_getenforcemode(&seconfig);
/* Check for an override of the mode via the kernel command line. */
rc = mount("proc", "/proc", "proc", 0, 0);
cfg = fopen("/proc/cmdline", "r");
if (cfg) {
char *tmp;
buf = malloc(selinux_page_size);
if (!buf) {
fclose(cfg);
return -1;
}
if (fgets(buf, selinux_page_size, cfg) &&
(tmp = strstr(buf, "enforcing="))) {
if (tmp == buf || isspace(*(tmp - 1))) {
secmdline =
atoi(tmp + sizeof("enforcing=") - 1);
}
}
fclose(cfg);
free(buf);
}
#ifndef MNT_DETACH
#define MNT_DETACH 2
#endif
if (rc == 0)
umount2("/proc", MNT_DETACH);
/*
* Determine the final desired mode.
* Command line argument takes precedence, then config file.
*/
if (secmdline >= 0)
*enforce = secmdline;
else if (seconfig >= 0)
*enforce = seconfig;
else
*enforce = 0; /* unspecified or disabled */
/*
* Check for the existence of SELinux via selinuxfs, and
* mount it if present for use in the calls below.
*/
if (mount("selinuxfs", SELINUXMNT, "selinuxfs", 0, 0) < 0 && errno != EBUSY) {
if (errno == ENODEV) {
/*
* SELinux was disabled in the kernel, either
* omitted entirely or disabled at boot via selinux=0.
* This takes precedence over any config or
* commandline enforcing setting.
*/
*enforce = 0;
} else {
/* Only emit this error if selinux was not disabled */
fprintf(stderr, "Mount failed for selinuxfs on %s: %s\n", SELINUXMNT, strerror(errno));
}
goto noload;
}
set_selinuxmnt(SELINUXMNT);
/*
* Note: The following code depends on having selinuxfs
* already mounted and selinuxmnt set above.
*/
if (seconfig == -1) {
/* Runtime disable of SELinux. */
rc = security_disable();
if (rc == 0) {
/* Successfully disabled, so umount selinuxfs too. */
umount(SELINUXMNT);
fini_selinuxmnt();
}
/*
* If we failed to disable, SELinux will still be
* effectively permissive, because no policy is loaded.
* No need to call security_setenforce(0) here.
*/
goto noload;
}
/*
* If necessary, change the kernel enforcing status to match
* the desired mode.
*/
orig_enforce = rc = security_getenforce();
if (rc < 0)
goto noload;
if (orig_enforce != *enforce) {
rc = security_setenforce(*enforce);
if (rc < 0) {
fprintf(stderr, "SELinux: Unable to switch to %s mode: %s\n", (*enforce ? "enforcing" : "permissive"), strerror(errno));
if (*enforce)
goto noload;
}
}
/* Load the policy. */
return selinux_mkload_policy(0);
noload:
/*
* Only return 0 on a successful completion of policy load.
* In any other case, we want to return an error so that init
* knows not to proceed with the re-exec for the domain transition.
* Depending on the *enforce setting, init will halt (> 0) or proceed
* normally (otherwise).
*/
return -1;
}
