1 #include <unistd.h> 2 #include <sys/types.h> 3 #include <fcntl.h> 4 #include <stdlib.h> 5 #include <stdio.h> 6 #include <errno.h> 7 #include <string.h> 8 #include <limits.h> 9 #include "selinux_internal.h" 10 #include "policy.h" 11 #include "mapping.h" 12 13 int security_compute_create(const char * scon, 14 const char * tcon, 15 security_class_t tclass, 16 char ** newcon) 17 { 18 char path[PATH_MAX]; 19 char *buf; 20 size_t size; 21 int fd, ret; 22 23 if (!selinux_mnt) { 24 errno = ENOENT; 25 return -1; 26 } 27 28 snprintf(path, sizeof path, "%s/create", selinux_mnt); 29 fd = open(path, O_RDWR); 30 if (fd < 0) 31 return -1; 32 33 size = selinux_page_size; 34 buf = malloc(size); 35 if (!buf) { 36 ret = -1; 37 goto out; 38 } 39 snprintf(buf, size, "%s %s %hu", scon, tcon, unmap_class(tclass)); 40 41 ret = write(fd, buf, strlen(buf)); 42 if (ret < 0) 43 goto out2; 44 45 memset(buf, 0, size); 46 ret = read(fd, buf, size - 1); 47 if (ret < 0) 48 goto out2; 49 50 *newcon = strdup(buf); 51 if (!(*newcon)) { 52 ret = -1; 53 goto out2; 54 } 55 ret = 0; 56 out2: 57 free(buf); 58 out: 59 close(fd); 60 return ret; 61 } 62
