add update man page.
Signed-off-by: Jianhong Yin <yin-jianhong@xxxxxxx>
---
io/copy_file_range.c | 7 +++++--
man/man8/xfs_io.8 | 9 +++------
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/io/copy_file_range.c b/io/copy_file_range.c
index 283f5094..02d50e53 100644
--- a/io/copy_file_range.c
+++ b/io/copy_file_range.c
@@ -72,6 +72,7 @@ copy_range_f(int argc, char **argv)
long long src = 0;
long long dst = 0;
size_t len = 0;
+ int len_ommited = 1;
int opt;
int ret;
int fd;
@@ -103,6 +104,7 @@ copy_range_f(int argc, char **argv)
printf(_("invalid length -- %s\n"), optarg);
return 0;
}
+ len_ommited = 0;
break;
case 'f':
src_file_nr = atoi(argv[1]);
@@ -128,7 +130,7 @@ copy_range_f(int argc, char **argv)
fd = filetable[src_file_nr].fd;
}
- if (src == 0 && dst == 0 && len == 0) {
+ if (len_ommited) {
off64_t sz;
sz = copy_src_filesize(fd);
@@ -136,7 +138,8 @@ copy_range_f(int argc, char **argv)
ret = 1;
goto out;
}
- len = sz;
+ if (sz > src)
+ len = sz - src;
}
ret = copy_file_range_cmd(fd, &src, &dst, len);
diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index 6e064bdd..f5f1c4fc 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -669,13 +669,10 @@ The source must be specified either by path
or as another open file
.RB ( \-f ).
If
-.I src_file
-.IR src_offset ,
-.IR dst_offset ,
-and
.I length
-are omitted the contents of src_file will be copied to the beginning of the
-open file, overwriting any data already there.
+is omitted will use
+.I src_file
+(file size - src_offset) instead.
.RS 1.0i
.PD 0
.TP 0.4i
--
2.21.0
