[git commit] dc: fix EOF handling in case of last line being incomplete

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=d8078a79beb665cb3c0408dbbbba132cff9fdc3b
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

This wasn't working correctly:

$ echo -ne '10 20+p' | dc
30

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 miscutils/bc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 3d26c39a7..9cc29f0ea 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -1425,7 +1425,9 @@ static BcStatus bc_read_line(BcVec *vec)
 				if (c == EOF) {
 					if (ferror(stdin))
 						quit(); // this emits error message
-					s = BC_STATUS_EOF;
+					// If we had some input before EOF, do not report EOF yet:
+					if (vec->len == 0)
+						s = BC_STATUS_EOF;
 					// Note: EOF does not append '\n', therefore:
 					// printf 'print 123\n' | bc - works
 					// printf 'print 123' | bc   - fails (syntax error)