BUG/MINOR: hlua: take default-path into account with lua-load-per-thread

As discussed in GH #3051, default-path is not taken into account when
loading files using lua-load-per-thread. In fact, the initial
hlua_load_state() (performed on first thread which parses the config)
is successful, but other threads run hlua_load_state() later based
on config hints which were saved by the first thread, and those config
hints only contain the file path provided on the lua-load-per-thread
config line, not the absolute one. Indeed, `default-path` directive
changes the current working directory only for the thread parsing the
configuration.

To fix the issue, when storing config hints under hlua_load_per_thread()
we now make sure to save the absolute file path for `lua-load-per-thread'
argument.

Thanks to GH user @zhanhb for having reported the issue

It may be backported to all stable versions.

diff --git a/src/hlua.c b/src/hlua.c
index 22eb0db286cef70b7dc6466061c5ff3bbf48e471..398831a8863a75d6cd7b10a0045c65550afe98f0 100644 (file)
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -13363,7 +13363,24 @@ static int hlua_load_per_thread(char **args, int section_type, struct proxy *cur
                return -1;
        }
        for (i = 1; *(args[i]) != 0; i++) {
-               per_thread_load[len][i - 1] = strdup(args[i]);
+               /* first arg is filename */
+               if (i == 1 && args[1][0] != '/') {
+                       char *curpath;
+                       char *fullpath = NULL;
+
+                       /* filename is provided using relative path, store the absolute path
+                        * to take current chdir into account for other threads file load
+                        * which occur later
+                        */
+                       curpath = getcwd(trash.area, trash.size);
+                       if (!curpath) {
+                               memprintf(err, "failed to retrieve cur path");
+                               return -1;
+                       }
+                       per_thread_load[len][i - 1] = memprintf(&fullpath, "%s/%s", curpath, args[1]);
+               }
+               else
+                       per_thread_load[len][i - 1] = strdup(args[i]);
                if (per_thread_load[len][i - 1] == NULL) {
                        memprintf(err, "out of memory error");
                        return -1;