command produces on standard output a totally ordered list of items
consistent with a partial ordering of items
mentioned in the input file.
If no file is specified, standard input is understood.
The input consists of pairs of items (non-empty strings)
separated by blanks. Pairs of different items indicate ordering.
Pairs of identical items indicate presence, but not ordering.
Odd data: there is an odd number of fields in the input file.
is conformant with:
X/Open Portability Guide, Issue 3, 1989
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003