tmpfiles: add a new return code for "operational failure" when processing

Things can fail, and we have no control over it:
- file system issues (immutable bits, file system errors, MAC refusals, etc)
- kernel refusing certain arguments when writing to /proc/sys or /sys
Let's add a new code for the case where we parsed configuration but failed
to execute it because of external errors.

diff --git a/src/basic/fd-util.h b/src/basic/fd-util.h
index 0f5a950f175a7a6fb7feb673f3e857ba4105f136..db259e6d137c170c03896b693cef52761f29eca5 100644 (file)
--- a/src/basic/fd-util.h
+++ b/src/basic/fd-util.h
@@ -102,6 +102,10 @@ int acquire_data_fd(const void *data, size_t size, unsigned flags);
 #define ERRNO_IS_DISCONNECT(r) \
         IN_SET(r, ENOTCONN, ECONNRESET, ECONNREFUSED, ECONNABORTED, EPIPE, ENETUNREACH)
 
+/* Resource exhaustion, could be our fault or general system trouble */
+#define ERRNO_IS_RESOURCE(r) \
+        IN_SET(r, ENOMEM, EMFILE, ENFILE)
+
 int fd_move_above_stdio(int fd);
 
 int rearrange_stdio(int original_input_fd, int original_output_fd, int original_error_fd);
@@ -117,5 +121,3 @@ static inline int make_null_stdio(void) {
                 (fd) = -1;                      \
                 _fd_;                           \
         })
-
-int fd_reopen(int fd, int flags);