ash: output: Fix fmtstr return value

Upstream commit:

    Date: Sat, 19 May 2018 02:39:44 +0800
    output: Fix fmtstr return value

    The function fmtstr is meant to return the actual length of output
    produced, rather than the untruncated length.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/shell/ash.c b/shell/ash.c
index db7dffc72..a006a1c26 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -713,7 +713,7 @@ fmtstr(char *outbuf, size_t length, const char *fmt, ...)
         ret = vsnprintf(outbuf, length, fmt, ap);
         va_end(ap);
         INT_ON;
-        return ret;
+        return ret > (int)length ? length : ret;
 }
 
 static void