Партнёры:
Хостинг:
tsort - topological sort
tsort [file]
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 (non-empty strings) separated by blanks. Pairs of different items indicate ordering. Pairs of identical items indicate presence, but not ordering.
The following operand is supported:
file
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
See environ(5) for descriptions of the following environment variables that affect the execution of tsort: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.
The following exit values are returned:
0
>0
See attributes(5) for descriptions of the following attributes:
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lorder(1), attributes(5), environ(5), standards(5)
Odd data: there are an odd number of fields in the input file.
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