[Lawrence D'Oliveiro <ldo@ge...>]

If dvdauthor cannot create any part of the output directory structure (for
instance because of protection failures), it doesn't notice. Instead, when
it later tries to create a VOB file in a missing output directory, it will
fail with a confusing message like

    Error opening out/VIDEO_TS/VTS_01_1.VOB: No such file or directory

To fix this, the initdir routine in src/dvdauthor.c needs to check the
returns from the mkdir calls. We want to ignore EEXIST (meaning the
directories already exist), but abort on other errors (e.g. "Permission
denied").

diff -ur dvdauthor-0.6.14-orig/src/dvdauthor.c dvdauthor-0.6.14-check-mkdir/src/dvdauthor.c
--- dvdauthor-0.6.14-orig/src/dvdauthor.c	2007-01-12 20:11:11.000000000 +1300
+++ dvdauthor-0.6.14-check-mkdir/src/dvdauthor.c	2008-07-30 21:00:11.000000000 +1200
@@ -873,11 +873,20 @@
     static char realfbase[1000];
 
     if( fbase ) {
-        mkdir(fbase,0777);
-        sprintf(realfbase,"%s/VIDEO_TS",fbase);
-        mkdir(realfbase,0777);
-        sprintf(realfbase,"%s/AUDIO_TS",fbase);
-        mkdir(realfbase,0777);
+        if (mkdir(fbase,0777) && errno != EEXIST) {
+            fprintf(stderr, "ERR:  cannot create dir %s: %s\n", fbase, strerror(errno));
+            exit(1);
+        }
+        snprintf(realfbase, sizeof realfbase, "%s/VIDEO_TS", fbase);
+        if (mkdir(realfbase,0777) && errno != EEXIST) {
+            fprintf(stderr, "ERR:  cannot create dir %s: %s\n", realfbase, strerror(errno));
+            exit(1);
+        }
+        snprintf(realfbase, sizeof realfbase, "%s/AUDIO_TS", fbase);
+        if (mkdir(realfbase,0777) && errno != EEXIST) {
+            fprintf(stderr, "ERR:  cannot create dir %s: %s\n", realfbase, strerror(errno));
+            exit(1);
+        }
     }
 }