semihosting: create file in smh_fs_write_at()

If a file does not exist, it should be created.

Fixes: f676b45151c3 ("fs: Add semihosting filesystem")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

diff --git a/fs/semihostingfs.c b/fs/semihostingfs.c
index 96eb334..3592338 100644 (file)
--- a/fs/semihostingfs.c
+++ b/fs/semihostingfs.c
@@ -57,8 +57,12 @@ static int smh_fs_write_at(const char *filename, loff_t pos, void *buffer,
 {
        long fd, size, ret;
 
+       /* Try to open existing file */
        fd = smh_open(filename, MODE_READ | MODE_BINARY | MODE_PLUS);
        if (fd < 0)
+               /* Create new file */
+               fd = smh_open(filename, MODE_WRITE | MODE_BINARY);
+       if (fd < 0)
                return fd;
        ret = smh_seek(fd, pos);
        if (ret < 0) {