From: Omar Sandoval <osandov@xxxxxx>
Signed-off-by: Omar Sandoval <osandov@xxxxxx>
---
io/link.c | 24 ++++++++++++++++++++----
man/man8/xfs_io.8 | 9 ++++++++-
2 files changed, 28 insertions(+), 5 deletions(-)
diff --git a/io/link.c b/io/link.c
index f4f4b139..3fc3e24d 100644
--- a/io/link.c
+++ b/io/link.c
@@ -12,6 +12,9 @@
#ifndef AT_EMPTY_PATH
#define AT_EMPTY_PATH 0x1000
#endif
+#ifndef AT_LINK_REPLACE
+#define AT_LINK_REPLACE 0x10000
+#endif
static cmdinfo_t flink_cmd;
@@ -22,6 +25,7 @@ flink_help(void)
"\n"
"link the open file descriptor to the supplied filename\n"
"\n"
+" -f -- overwrite the target filename if it exists (AT_LINK_REPLACE)\n"
"\n"));
}
@@ -30,10 +34,22 @@ flink_f(
int argc,
char **argv)
{
- if (argc != 2)
+ int flags = AT_EMPTY_PATH;
+ int c;
+
+ while ((c = getopt(argc, argv, "f")) != EOF) {
+ switch (c) {
+ case 'f':
+ flags |= AT_LINK_REPLACE;
+ break;
+ default:
+ return command_usage(&flink_cmd);
+ }
+ }
+ if (optind != argc - 1)
return command_usage(&flink_cmd);
- if (linkat(file->fd, "", AT_FDCWD, argv[1], AT_EMPTY_PATH) < 0) {
+ if (linkat(file->fd, "", AT_FDCWD, argv[optind], flags) < 0) {
perror("flink");
return 0;
}
@@ -46,9 +62,9 @@ flink_init(void)
flink_cmd.name = "flink";
flink_cmd.cfunc = flink_f;
flink_cmd.argmin = 1;
- flink_cmd.argmax = 1;
+ flink_cmd.argmax = -1;
flink_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK | CMD_FLAG_ONESHOT;
- flink_cmd.args = _("filename");
+ flink_cmd.args = _("[-f] filename");
flink_cmd.oneline =
_("link the open file descriptor to the supplied filename");
flink_cmd.help = flink_help;
diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index c69b295d..f79b3a59 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -807,8 +807,15 @@ for the full list) is available via the
.B help
command.
.TP
-.BI "flink " path
+.BI "flink [ \-f ]" " path"
Link the currently open file descriptor into the filesystem namespace.
+.RS 1.0i
+.PD 0
+.TP 0.4i
+.B \-f
+overwrite the target path if it exists (AT_LINK_REPLACE).
+.PD
+.RE
.TP
.BR stat " [ " \-v "|" \-r " ]"
Selected statistics from
--
2.25.0
