[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/security/tomoyo/environ.c b/ap/os/linux/linux-3.4.x/security/tomoyo/environ.c
new file mode 100644
index 0000000..ad4c6e1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/tomoyo/environ.c
@@ -0,0 +1,122 @@
+/*
+ * security/tomoyo/environ.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+
+/**
+ * tomoyo_check_env_acl - Check permission for environment variable's name.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_env_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_env_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return tomoyo_path_matches_pattern(r->param.environ.name, acl->env);
+}
+
+/**
+ * tomoyo_audit_env_log - Audit environment variable name log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_env_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_supervisor(r, "misc env %s\n",
+ r->param.environ.name->name);
+}
+
+/**
+ * tomoyo_env_perm - Check permission for environment variable's name.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @env: The name of environment variable.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env)
+{
+ struct tomoyo_path_info environ;
+ int error;
+
+ if (!env || !*env)
+ return 0;
+ environ.name = env;
+ tomoyo_fill_path_info(&environ);
+ r->param_type = TOMOYO_TYPE_ENV_ACL;
+ r->param.environ.name = &environ;
+ do {
+ tomoyo_check_acl(r, tomoyo_check_env_acl);
+ error = tomoyo_audit_env_log(r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ return error;
+}
+
+/**
+ * tomoyo_same_env_acl - Check for duplicated "struct tomoyo_env_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_env_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_env_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_env_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return p1->env == p2->env;
+}
+
+/**
+ * tomoyo_write_env - Write "struct tomoyo_env_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_env(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_env_acl e = { .head.type = TOMOYO_TYPE_ENV_ACL };
+ int error = -ENOMEM;
+ const char *data = tomoyo_read_token(param);
+
+ if (!tomoyo_correct_word(data) || strchr(data, '='))
+ return -EINVAL;
+ e.env = tomoyo_get_name(data);
+ if (!e.env)
+ return error;
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_env_acl, NULL);
+ tomoyo_put_name(e.env);
+ return error;
+}
+
+/**
+ * tomoyo_write_misc - Update environment variable list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_misc(struct tomoyo_acl_param *param)
+{
+ if (tomoyo_str_starts(¶m->data, "env "))
+ return tomoyo_write_env(param);
+ return -EINVAL;
+}