static int validate_handler(
const semanage_fcontext_t* fcon,
void* varg) {
char* str;
/* Unpack varg */
struct validate_handler_arg* arg =
(struct validate_handler_arg*) varg;
semanage_handle_t* handle = arg->handle;
const sepol_policydb_t* policydb = arg->policydb;
/* Unpack fcontext */
const char* expr = semanage_fcontext_get_expr(fcon);
int type = semanage_fcontext_get_type(fcon);
const char* type_str = semanage_fcontext_get_type_str(type);
semanage_context_t* con = semanage_fcontext_get_con(fcon);
if (con && sepol_context_check(handle->sepolh, policydb, con) < 0)
goto invalid;
return 0;
invalid:
if (semanage_context_to_string(handle, con, &str) >= 0) {
ERR(handle, "invalid context %s specified for %s [%s]",
str, expr, type_str);
free(str);
} else
ERR(handle, "invalid context specified for %s [%s]",
expr, type_str);
return -1;
}
/* Helper function called via semanage_fcontext_iterate() */
static int fcontext_matches(const semanage_fcontext_t *fcontext, void *varg)
{
const char *oexpr = semanage_fcontext_get_expr(fcontext);
fc_match_handle_t *handp = varg;
struct Ustr *expr;
regex_t re;
int type, retval = -1;
/* Only match ALL or DIR */
type = semanage_fcontext_get_type(fcontext);
if (type != SEMANAGE_FCONTEXT_ALL && type != SEMANAGE_FCONTEXT_ALL)
return 0;
/* Convert oexpr into a Ustr and anchor it at the beginning */
expr = ustr_dup_cstr("^");
if (expr == USTR_NULL)
goto done;
if (!ustr_add_cstr(&expr, oexpr))
goto done;
/* Strip off trailing ".+" or ".*" */
if (ustr_cmp_suffix_cstr_eq(expr, ".+") ||
ustr_cmp_suffix_cstr_eq(expr, ".*")) {
if (!ustr_del(&expr, 2))
goto done;
}
/* Strip off trailing "(/.*)?" */
if (ustr_cmp_suffix_cstr_eq(expr, "(/.*)?")) {
if (!ustr_del(&expr, 6))
goto done;
}
if (ustr_cmp_suffix_cstr_eq(expr, "/")) {
if (!ustr_del(&expr, 1))
goto done;
}
/* Append pattern to eat up trailing slashes */
if (!ustr_add_cstr(&expr, "/*$"))
goto done;
/* Check dir against expr */
if (regcomp(&re, ustr_cstr(expr), REG_EXTENDED) != 0)
goto done;
if (regexec(&re, handp->dir, 0, NULL, 0) == 0)
handp->matched = 1;
regfree(&re);
retval = 0;
done:
ustr_free(expr);
return retval;
}