[PATCH 1/2] tools/mkimage: fix handling long filenames

[Sven Roederer]

The cmdline for calling the dtc was cut-off when using long filenames (e.g.
245 bytes) for output-file and datafile of "-f" parameter.
For FIT-images cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN] is declared (hardcoded 512 bytes),
and contains some static values, the path of a tmpfile and a datafile. tmpfile is
max MKIMAGE_MAX_TMPFILE_LEN (256) and datafile might be also this size. Having two
very long pathname results in a truncation os the executed shell command, as the
truncated datafile path will not be found.
Redefine MKIMAGE_MAX_DTC_CMDLINE_LEN to "2 * MKIMAGE_MAX_TMPFILE_LEN + 35 for the
parameters.
This likely applies to the "-d" parameter, too.

Signed-off-by: Sven Roederer <devel-sven at geroedel.de>
---
 tools/mkimage.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/mkimage.h b/tools/mkimage.h
index 0254af59fb..9de94dbe99 100644
--- a/tools/mkimage.h
+++ b/tools/mkimage.h
@@ -42,6 +42,7 @@ static inline ulong map_to_sysmem(void *ptr)
 #define MKIMAGE_TMPFILE_SUFFIX		".tmp"
 #define MKIMAGE_MAX_TMPFILE_LEN		256
 #define MKIMAGE_DEFAULT_DTC_OPTIONS	"-I dts -O dtb -p 500"
-#define MKIMAGE_MAX_DTC_CMDLINE_LEN	512
+#define MKIMAGE_MAX_DTC_CMDLINE_LEN	2 * MKIMAGE_MAX_TMPFILE_LEN + 35 
 /* 35 bytes for quotes, spaces, "-o", len(MKIMAGE_DEFAULT_DTC_OPTIONS), len(MKIMAGE_TMPFILE_SUFFIX) */
 
 #endif /* _MKIIMAGE_H_ */
-- 
2.20.1