 |
dd: truncate file when using seek= - ubase - suckless linux base utils |
 |
git clone git://git.suckless.org/ubase |
 |
Log |
|
Files |
|
Refs |
|
README |
|
LICENSE |
|
--- |
|
commit 596663c1b1f140c10ba1facede783201d6a876a7 |
|
parent e358d74a805829dddf987ff62f42c7631df48e88 |
|
Author: Eivind Uggedal <[email protected]> |
|
Date: Tue, 15 Mar 2016 21:06:28 +0000 |
|
|
|
dd: truncate file when using seek= |
|
|
|
Diffstat: |
|
M 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) { |
