diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/shuf.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/shuf.c b/src/shuf.c index bbf3a86c2..0fabb0bfe 100644 --- a/src/shuf.c +++ b/src/shuf.c @@ -463,7 +463,8 @@ main (int argc, char **argv) break; case 1: - if (! (STREQ (operand[0], "-") || freopen (operand[0], "r", stdin))) + if (! (STREQ (operand[0], "-") || ! head_lines + || freopen (operand[0], "r", stdin))) error (EXIT_FAILURE, errno, "%s", operand[0]); break; @@ -474,7 +475,8 @@ main (int argc, char **argv) fadvise (stdin, FADVISE_SEQUENTIAL); - if (head_lines != SIZE_MAX && input_size () > RESERVOIR_MIN_INPUT) + if (head_lines != SIZE_MAX && (! head_lines + || input_size () > RESERVOIR_MIN_INPUT)) { use_reservoir_sampling = true; n_lines = SIZE_MAX; /* unknown number of input lines, for now. */ |