dc: fix EOF handling in case of last line being incomplete

This wasn't working correctly:

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

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

1 files changed, 3 insertions, 1 deletions

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)