diff options
Diffstat (limited to 'lib/libc/sys/unlink.2')
| -rw-r--r-- | lib/libc/sys/unlink.2 | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/lib/libc/sys/unlink.2 b/lib/libc/sys/unlink.2 index c6c6a150c1a2..83823f1d78ae 100644 --- a/lib/libc/sys/unlink.2 +++ b/lib/libc/sys/unlink.2 @@ -28,7 +28,7 @@ .\" @(#)unlink.2 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd November 11, 2018 +.Dd April 6, 2019 .Dt UNLINK 2 .Os .Sh NAME @@ -42,7 +42,9 @@ .Ft int .Fn unlink "const char *path" .Ft int -.Fn unlinkat "int fd" "const char *path" "int flag" +.Fn unlinkat "int dfd" "const char *path" "int flag" +.Ft int +.Fn funlinkat "int dfd" "const char *path" "int fd" "int flag" .Sh DESCRIPTION The .Fn unlink @@ -74,7 +76,7 @@ except in the case where specifies a relative path. In this case the directory entry to be removed is determined relative to the directory associated with the file descriptor -.Fa fd +.Fa dfd instead of the current working directory. .Pp The values for @@ -113,6 +115,26 @@ or respectively, depending on whether or not the .Dv AT_REMOVEDIR bit is set in flag. +.Pp +The +.Fn funlinkat +system call can be used to unlink an already-opened file, unless that +file has been replaced since it was opened. +It is equivalent to +.Fn unlinkat +in the case where +.Fa path +is already open as the file descriptor +.Fa fd . +Otherwise, the path will not be removed and an error will be returned. +The +.Fa fd +can be set the +.Dv FD_NONE . +In that case +.Fn funlinkat +behaves exactly like +.Fn unlinkat . .Sh RETURN VALUES .Rv -std unlink .Sh ERRORS @@ -227,6 +249,15 @@ or the relative .Fa path escapes it. .El +.Pp +In addition to the errors returned by +.Fn unlinkat , +.Fn funlinkat +may fail if: +.Bl -tag -width Er +.It Bq Er EDEADLK +The file descriptor is not associated with the path. +.El .Sh SEE ALSO .Xr chflags 2 , .Xr close 2 , @@ -246,6 +277,10 @@ The .Fn unlinkat system call appeared in .Fx 8.0 . +The +.Fn funlinkat +system call appeared in +.Fx 13.0 . .Pp The .Fn unlink |