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tsort(1) [osx man page]

TSORT(1)						    BSD General Commands Manual 						  TSORT(1)

tsort -- topological sort of a directed graph SYNOPSIS
tsort [-l] [-q] [file] DESCRIPTION
tsort takes a list of pairs of node names representing directed arcs in a graph and prints the nodes in topological order on standard output. Input is taken from the named file, or from standard input if no file is given. Node names in the input are separated by white space and there must be an even number of node pairs. Presence of a node in a graph can be represented by an arc from the node to itself. This is useful when a node is not connected to any other nodes. If the graph contains a cycle (and therefore cannot be properly sorted), one of the arcs in the cycle is ignored and the sort continues. Cycles are reported on standard error. The options are as follows: -l Search for and display the longest cycle. Can take a very long time. -q Do not display informational messages about cycles. This is primarily intended for building libraries, where optimal ordering is not critical, and cycles occur often. SEE ALSO
A tsort command appeared in Version 7 AT&T UNIX. This tsort command and manual page are derived from sources contributed to Berkeley by Michael Rendell of Memorial University of Newfoundland. BSD
April 1, 1994 BSD

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tsort(1)							   User Commands							  tsort(1)

tsort - topological sort SYNOPSIS
/usr/ccs/bin/tsort [file] DESCRIPTION
The tsort command produces on the standard output a totally ordered list of items consistent with a partial ordering of items mentioned in the input file. The input consists of pairs of items (nonempty strings) separated by blanks. Pairs of different items indicate ordering. Pairs of identical items indicate presence, but not ordering. OPERANDS
The following operand is supported: file A path name of a text file to order. If no file operand is given, the standard input is used. EXAMPLES
Example 1: An example of the tsort command The command: example% tsort <<EOF a b c c d e g g f g e f EOF produces the output: a b c d e f g ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of tsort: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. EXIT STATUS
The following exit values are returned: 0 Successful completion. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWbtool | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
lorder(1), attributes(5), environ(5), standards(5) DIAGNOSTICS
Odd data: there are an odd number of fields in the input file. SunOS 5.10 1 Feb 1995 tsort(1)
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