tsort(1) User Commands tsort(1)NAMEtsort - 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 ALSOlorder(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)