+
+LTTNG_HIDDEN
+int utils_change_working_directory(const char *path)
+{
+ int ret;
+
+ assert(path);
+
+ DBG("Changing working directory to \"%s\"", path);
+ ret = chdir(path);
+ if (ret) {
+ PERROR("Failed to change working directory to \"%s\"", path);
+ goto end;
+ }
+
+ /* Check for write access */
+ if (access(path, W_OK)) {
+ if (errno == EACCES) {
+ /*
+ * Do not treat this as an error since the permission
+ * might change in the lifetime of the process
+ */
+ DBG("Working directory \"%s\" is not writable", path);
+ } else {
+ PERROR("Failed to check if working directory \"%s\" is writable",
+ path);
+ }
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int utils_parse_unsigned_long_long(const char *str,
+ unsigned long long *value)
+{
+ int ret;
+ char *endptr;
+
+ assert(str);
+ assert(value);
+
+ errno = 0;
+ *value = strtoull(str, &endptr, 10);
+
+ /* Conversion failed. Out of range? */
+ if (errno != 0) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Not the end of the string? */
+ if (*endptr) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Empty string? */
+ if (endptr == str) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+
+end:
+ return ret;
+}