change handling of standard input

For `-f /dev/stdin`, the `pathname` of the parsing context will be empty
as for any other streamed input.

`instance_t::include_directive` did not work as expected for `-f /dev/stdin`
and relative file names. One would expect them to be relative to the current
directory rather than `/dev`.

This will lead to `While parsing file ""` messages. This could be
adjusted to read `While parsing standard input`, but maybe it's not
worth the special cases.

This commit also fixes bug 788: behaviour of source_context for '-f -'

1 files changed, 1 insertions, 1 deletions

diff --git a/src/session.cc b/src/session.cc
index b6153203..f047a540 100644
--- a/src/session.cc
+++ b/src/session.cc
@@ -143,7 +143,7 @@ std::size_t session_t::read_data(const string& master_account)
     }
 
     foreach (const path& pathname, HANDLER(file_).data_files) {
-      if (pathname == "-") {
+      if (pathname == "-" || pathname == "/dev/stdin") {
         // To avoid problems with stdin and pipes, etc., we read the entire
         // file in beforehand into a memory buffer, and then parcel it out
         // from there.