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-rw-r--r--lib/libc/sys/utimensat.226
1 files changed, 20 insertions, 6 deletions
diff --git a/lib/libc/sys/utimensat.2 b/lib/libc/sys/utimensat.2
index 7fcb3c6696974..cf7ba290a813c 100644
--- a/lib/libc/sys/utimensat.2
+++ b/lib/libc/sys/utimensat.2
@@ -31,7 +31,7 @@
.\" @(#)utimes.2 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd October 20, 2018
+.Dd November 11, 2018
.Dt UTIMENSAT 2
.Os
.Sh NAME
@@ -148,7 +148,12 @@ By default,
changes the times of the file referenced by the symbolic link.
.It Dv AT_BENEATH
Only allow to change the times of a file which is beneath of
-the starting directory.
+the topping directory.
+See the description of the
+.Dv O_BENEATH
+flag in the
+.Xr open 2
+manual page.
.El
.Sh RETURN VALUES
.Rv -std
@@ -271,14 +276,23 @@ is neither
.Dv AT_FDCWD
nor a file descriptor associated with a directory.
.It Bq Er ENOTCAPABLE
+.Fa path
+is an absolute path,
+or contained a ".." component leading to a
+directory outside of the directory hierarchy specified by
+.Fa fd ,
+and the process is in capability mode.
+.It Bq Er ENOTCAPABLE
The
.Dv AT_BENEATH
-flag was specified but
+flag was provided to
+.Fn utimensat ,
+and the absolute
.Fa path
-is not strictly relative to the starting directory.
-For example,
+does not have its tail fully contained under the topping directory,
+or the relative
.Fa path
-is absolute or includes a ".." component that escapes the starting directory.
+escapes it.
.El
.Sh SEE ALSO
.Xr chflags 2 ,