do not write to log file if cannot open

ianmaclarty · Mar 15, 2020 · 42cda6d · 42cda6d
1 parent e34b3e0
commit 42cda6d
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Showing 2 changed files with 7 additions and 5 deletions.
diff --git a/lua/extra.lua b/lua/extra.lua
@@ -346,9 +346,11 @@ function log(fmt, ...)
     local plat = am.platform
     if plat == "windows" or plat == "linux" or plat == "osx" then
         local f = io.open(am.app_data_dir.."log.txt", first_log and "w" or "a")
-        f:write(msg)
-        f:write("\n")
-        f:close()
+        if f then
+            f:write(msg)
+            f:write("\n")
+            f:close()
+        end
     end
 
     if am._main_window then

diff --git a/src/am_spritepack.cpp b/src/am_spritepack.cpp
@@ -185,7 +185,7 @@ static void write_data() {
     double w, h, adv;
     FILE *f = am_fopen(lua_filename, "w");
     if (f == NULL) {
-        fprintf(stderr, "unable to open %s for writing\n", lua_filename);
+        fprintf(stderr, "unable to open %s for writing: %s\n", lua_filename, strerror(errno));
         return;
     }
     fprintf(f, "local font_data = {\n");
@@ -365,7 +365,7 @@ static void write_png() {
         atlas_data, atlas_width, atlas_height, 4, &len);
     FILE *f = am_fopen(png_filename, "wb");
     if (f == NULL) {
-        fprintf(stderr, "unable to open %s for writing\n", png_filename);
+        fprintf(stderr, "unable to open %s for writing: %s\n", png_filename, strerror(errno));
         return;
     }
     fwrite(png_data, len, 1, f);