diff options
Diffstat (limited to 'bin/dd/position.c')
| -rw-r--r-- | bin/dd/position.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/bin/dd/position.c b/bin/dd/position.c index 9d3d0d8..10020d0 100644 --- a/bin/dd/position.c +++ b/bin/dd/position.c @@ -130,7 +130,7 @@ pos_out() * going to fail, but don't protect the user -- they shouldn't * have specified the seek operand. */ - if (!(out.flags & ISTAPE)) { + if (out.flags & (ISSEEK | ISPIPE)) { errno = 0; if (lseek(out.fd, out.offset * out.dbsz, SEEK_CUR) == -1 && errno != 0) @@ -166,9 +166,13 @@ pos_out() if (ioctl(out.fd, MTIOCTOP, &t_op) == -1) err(1, "%s", out.name); - while (cnt++ < out.offset) - if ((n = write(out.fd, out.db, out.dbsz)) != out.dbsz) + while (cnt++ < out.offset) { + n = write(out.fd, out.db, out.dbsz); + if (n == -1) err(1, "%s", out.name); + if ((size_t)n != out.dbsz) + errx(1, "%s: write failure", out.name); + } break; } } |
