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#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include "selinux_internal.h"
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include "policy.h"
int is_selinux_enabled(void)
{
char buf[BUFSIZ];
FILE *fp;
char *bufp;
int enabled = 0;
char * con;
/* init_selinuxmnt() gets called before this function. We
* will assume that if a selinux file system is mounted, then
* selinux is enabled. */
if (selinux_mnt) {
/* Since a file system is mounted, we consider selinux
* enabled. If getcon fails, selinux is still enabled.
* We only consider it disabled if no policy is loaded. */
enabled = 1;
if (getcon(&con) == 0) {
if (!strcmp(con, "kernel"))
enabled = 0;
freecon(con);
}
return enabled;
}
/* Drop back to detecting it the long way. */
fp = fopen("/proc/filesystems", "r");
if (!fp)
return -1;
while ((bufp = fgets(buf, sizeof buf - 1, fp)) != NULL) {
if (strstr(buf, "selinuxfs")) {
enabled = 1;
break;
}
}
if (!bufp)
goto out;
/* Since an selinux file system is available, we consider
* selinux enabled. If getcon fails, selinux is still
* enabled. We only consider it disabled if no policy is loaded. */
if (getcon(&con) == 0) {
if (!strcmp(con, "kernel"))
enabled = 0;
freecon(con);
}
out:
fclose(fp);
return enabled;
}
hidden_def(is_selinux_enabled)
/*
* Function: is_selinux_mls_enabled()
* Return: 1 on success
* 0 on failure
*/
int is_selinux_mls_enabled(void)
{
char buf[20], path[PATH_MAX];
int fd, ret, enabled = 0;
if (!selinux_mnt)
return enabled;
snprintf(path, sizeof path, "%s/mls", selinux_mnt);
fd = open(path, O_RDONLY);
if (fd < 0)
return enabled;
memset(buf, 0, sizeof buf);
do {
ret = read(fd, buf, sizeof buf - 1);
} while (ret < 0 && errno == EINTR);
close(fd);
if (ret < 0)
return enabled;
if (!strcmp(buf, "1"))
enabled = 1;
return enabled;
}
hidden_def(is_selinux_mls_enabled)
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