TSORT(1) User Commands TSORT(1)
NAME
tsort - topological sort
SYNOPSIS
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 (non-empty 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(7) for descriptions of the following environment
variables that affect the execution of
tsort:
LANG,
LC_ALL,
LC_CTYPE,
LC_MESSAGES, and
NLSPATH.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
SEE ALSO
lorder(1),
attributes(7),
environ(7),
standards(7)DIAGNOSTICS
Odd data: there are an odd number of fields in the input file.
June 28, 2007 TSORT(1)
