findfirst: support SFN fall-back

stsp · stsp · commit 67a3e2d2640c · 2026-03-21T14:04:40.000+02:00
If some drive does not support LFN, SFN fall-back should be used. This patch actually only adds the needed comment, as the code is already there. Fixes dosemu2/dosemu2#2786
diff --git a/src/libc/dos/dir/findfirs.c b/src/libc/dos/dir/findfirs.c
@@ -105,9 +105,8 @@ findfirst(const char *pathname, struct ffblk *ffblk, int attrib)
       return 0;
     }
   }
-  else
+  /* else: not using LFN, or LFN unsupported for that drive */
   {
-
     #define _sizeof_dos_ffblk 44
     /* There will be a _sizeof_dos_ffblk character return value from findfirst
        in the DTA.  Put the file name before this.  First set the DTA to be

Original file line number	Diff line number	Diff line change
`@@ -105,9 +105,8 @@ findfirst(const char pathname, struct ffblk ffblk, int attrib)`
`105`	`105`	`return 0;`
`106`	`106`	`}`
`107`	`107`	`}`
`108`		`- else`
	`108`	`+ /* else: not using LFN, or LFN unsupported for that drive */`
`109`	`109`	`{`
`110`		`-`
`111`	`110`	`#define _sizeof_dos_ffblk 44`
`112`	`111`	`/* There will be a _sizeof_dos_ffblk character return value from findfirst`
`113`	`112`	`in the DTA. Put the file name before this. First set the DTA to be`