NAME
tee —
copy to multiple outputs
SYNOPSIS
tee |
[-aei] [file]… |
DESCRIPTION
Copies the standard input stream to the standard output stream and all files.
If writing to the standard output stream fails, a diagnostic is
issued and the copy is aborted. If opening or writing to a
file fails, however, a diagnostic is issued and the
file henceforth ignored (unless
-e, in which case the copy is
aborted).
OPTIONS
-a,--append- Append to files instead of truncating.
-i,--ignore-interrupt- Ignore
SIGINT. -e- Abort the copy on I/O errors to files, instead of ignoring the offender.
-p- Ignored for compatibility with the GNU system.
SIGNALS
SIGINT- Ignored if
-i; default otherwise.
EXIT STATUS
1 on a read, write, or open error.
SEE ALSO
STANDARDS
Conforms to IEEE Std 1003.1-2008
(“POSIX.1”); -e is an
extension.
HISTORY
Appeared in Version 5 AT&T UNIX as tee(I):
tee - pipe fitting
With no flags and very lenient write error handling.
Version 7 AT&T UNIX sees
tee [ -i ] [ -a ] [ file ]
...
With -a first seeking to the end of the file, instead of
strictly appending. - functions as an alias for
-i.
AT&T System III UNIX changes
-a to actually append.