ubase

suckless linux base utils
git clone git://git.suckless.org/ubase
Log | Files | Refs | README | LICENSE

commit 596663c1b1f140c10ba1facede783201d6a876a7
parent e358d74a805829dddf987ff62f42c7631df48e88
Author: Eivind Uggedal <eivind@uggedal.com>
Date:   Tue, 15 Mar 2016 21:06:28 +0000

dd: truncate file when using seek=

Diffstat:
dd.c | 9+++++++++
1 file changed, 9 insertions(+), 0 deletions(-)

diff --git a/dd.c b/dd.c @@ -108,6 +108,15 @@ prepare_copy(struct dd_config *ddc, int *ifd, int *ofd) return -1; } + if (ddc->seek) { + if (fstat(*ofd, &st) < 0) + return -1; + if (!S_ISREG(st.st_mode)) + ; + else if (ftruncate(*ofd, ddc->seek) < 0) + return -1; + } + if (lseek(*ifd, ddc->skip, SEEK_CUR) < 0) { char buffer[ddc->bs]; for (uint64_t i = 0; i < ddc->skip; i += ddc->bs) {