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This page displays the COHERENT manpage for tsort [Topological sort].
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tsort -- Command Topological sort tsort [file] tsort performs a topological sort of a set of input items. The input file (or the standard input, if no file is given) specifies an ordering on pairs of items. It consists of pairs of items separated by blanks, tabs or newlines. If a pair contains the same item twice, it simply indicates that the item is in the input set. Otherwise, the pair indicates that the first item precedes the second in the ordering. tsort prints a sorted list of the input items on the standard output. See Also commands, sort Diagnostics tsort prints an error message on the standard error if its input contains an odd number of items or if the specified ordering includes a cycle.