| 901 | } |
| 902 | |
| 903 | static int rule_matches(const char *fname, filter_rule *ex, int name_flags) |
| 904 | { |
| 905 | int slash_handling, str_cnt = 0, anchored_match = 0; |
| 906 | int ret_match = ex->rflags & FILTRULE_NEGATE ? 0 : 1; |
| 907 | const char *p, *pattern = ex->pattern; |
| 908 | const char *strings[16]; /* more than enough */ |
| 909 | const char *name = fname + (*fname == '/'); |
| 910 | |
| 911 | if (!*name || ex->elide == cur_elide_value) |
| 912 | return 0; |
| 913 | |
| 914 | if (!(name_flags & NAME_IS_XATTR) ^ !(ex->rflags & FILTRULE_XATTR)) |
| 915 | return 0; |
| 916 | |
| 917 | if (!ex->u.slash_cnt && !(ex->rflags & FILTRULE_WILD2)) { |
| 918 | /* If the pattern does not have any slashes AND it does |
| 919 | * not have a "**" (which could match a slash), then we |
| 920 | * just match the name portion of the path. */ |
| 921 | if ((p = strrchr(name,'/')) != NULL) |
| 922 | name = p+1; |
| 923 | } else if (ex->rflags & FILTRULE_ABS_PATH && *fname != '/' |
| 924 | && curr_dir_len > module_dirlen + 1) { |
| 925 | /* If we're matching against an absolute-path pattern, |
| 926 | * we need to prepend our full path info. */ |
| 927 | strings[str_cnt++] = curr_dir + module_dirlen + 1; |
| 928 | strings[str_cnt++] = "/"; |
| 929 | } else if (ex->rflags & FILTRULE_WILD2_PREFIX && *fname != '/') { |
| 930 | /* Allow "**"+"/" to match at the start of the string. */ |
| 931 | strings[str_cnt++] = "/"; |
| 932 | } |
| 933 | strings[str_cnt++] = name; |
| 934 | if (name_flags & NAME_IS_DIR) { |
| 935 | /* Allow a trailing "/"+"***" to match the directory. */ |
| 936 | if (ex->rflags & FILTRULE_WILD3_SUFFIX) |
| 937 | strings[str_cnt++] = "/"; |
| 938 | } else if (ex->rflags & FILTRULE_DIRECTORY) |
| 939 | return !ret_match; |
| 940 | strings[str_cnt] = NULL; |
| 941 | |
| 942 | if (*pattern == '/') { |
| 943 | anchored_match = 1; |
| 944 | pattern++; |
| 945 | } |
| 946 | |
| 947 | if (!anchored_match && ex->u.slash_cnt |
| 948 | && !(ex->rflags & FILTRULE_WILD2)) { |
| 949 | /* A non-anchored match with an infix slash and no "**" |
| 950 | * needs to match the last slash_cnt+1 name elements. */ |
| 951 | slash_handling = ex->u.slash_cnt + 1; |
| 952 | } else if (!anchored_match && !(ex->rflags & FILTRULE_WILD2_PREFIX) |
| 953 | && ex->rflags & FILTRULE_WILD2) { |
| 954 | /* A non-anchored match with an infix or trailing "**" (but not |
| 955 | * a prefixed "**") needs to try matching after every slash. */ |
| 956 | slash_handling = -1; |
| 957 | } else { |
| 958 | /* The pattern matches only at the start of the path or name. */ |
| 959 | slash_handling = 0; |
| 960 | } |
no test coverage detected