midfavila
/
ubase
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

dd: truncate file when using seek=

This commit is contained in:
Eivind Uggedal 2016-03-15 21:06:28 +00:00 committed by sin
parent e358d74a80
commit 596663c1b1
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
dd.c
View File

@ -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) {