1 #include <unistd.h> 2 #include <errno.h> 3 #include <stdio.h> 4 #include <stdlib.h> 5 #include <string.h> 6 #include <ctype.h> 7 #include <pwd.h> 8 #include <limits.h> 9 #include "selinux_internal.h" 10 #include "context_internal.h" 11 get_customizable_type_list(char *** retlist)12static int get_customizable_type_list(char *** retlist) 13 { 14 FILE *fp; 15 char *buf; 16 unsigned int ctr = 0, i; 17 char **list = NULL; 18 19 fp = fopen(selinux_customizable_types_path(), "re"); 20 if (!fp) 21 return -1; 22 23 buf = malloc(selinux_page_size); 24 if (!buf) { 25 fclose(fp); 26 return -1; 27 } 28 while (fgets_unlocked(buf, selinux_page_size, fp) && ctr < UINT_MAX) { 29 ctr++; 30 } 31 rewind(fp); 32 if (ctr) { 33 list = 34 (char **) calloc(sizeof(char *), 35 ctr + 1); 36 if (list) { 37 i = 0; 38 while (fgets_unlocked(buf, selinux_page_size, fp) 39 && i < ctr) { 40 buf[strlen(buf) - 1] = 0; 41 list[i] = (char *) strdup(buf); 42 if (!list[i]) { 43 unsigned int j; 44 for (j = 0; j < i; j++) 45 free(list[j]); 46 free(list); 47 list = NULL; 48 break; 49 } 50 i++; 51 } 52 } 53 } 54 fclose(fp); 55 free(buf); 56 if (!list) 57 return -1; 58 *retlist = list; 59 return 0; 60 } 61 62 static char **customizable_list = NULL; 63 is_context_customizable(const char * scontext)64int is_context_customizable(const char * scontext) 65 { 66 int i; 67 const char *type; 68 context_t c; 69 70 if (!customizable_list) { 71 if (get_customizable_type_list(&customizable_list) != 0) 72 return -1; 73 } 74 75 c = context_new(scontext); 76 if (!c) 77 return -1; 78 79 type = context_type_get(c); 80 if (!type) { 81 context_free(c); 82 return -1; 83 } 84 85 for (i = 0; customizable_list[i]; i++) { 86 if (strcmp(customizable_list[i], type) == 0) { 87 context_free(c); 88 return 1; 89 } 90 } 91 context_free(c); 92 return 0; 93 } 94