TSORT(1POSIX)

📦 version 2017a, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu resolute, ubuntu stonking

💖 PROLOG 💖

okay bestie, real talk first: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so pls consult the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface may not be implemented on Linux at all. iykyk. 🫶

✨ NAME ✨

tsort — topological sort

like. that's the whole name. it does the thing. 💅

🌈 SYNOPSIS 🌈

tsort [file]

that's it. that's the whole vibe. no flags, no drama.

🦋 DESCRIPTION 🦋

The tsort utility shall write to standard output a totally ordered list of items consistent with a partial ordering of items contained in the input. 🎀

The application shall ensure that the input consists of pairs of items (non-empty strings) separated by <blank> characters. Pairs of different items indicate ordering. Pairs of identical items indicate presence, but not ordering. bestie that's the whole ruleset, no cap. ⭐

🎀 OPTIONS 🎀

None. 💀

ikr. zero options. nothing to configure. it's giving minimalism. it's giving "i simply am." the way that there is literally nothing here to learn. iconic behavior honestly.

🌸 OPERANDS 🌸

The following operand shall be supported:

  • file — a pathname of a text file to order. If no file operand is given, the standard input shall be used. ✨

💜 STDIN 💜

The standard input shall be used if no file operand is specified, and shall be used if the file operand is '-' and the implementation treats the '-' as meaning standard input. Otherwise, the standard input shall not be used. See the INPUT FILES section. 🫶

🧚 INPUT FILES 🧚

The input file shall be a text file. that's the requirement. that's the whole requirement.

💅 ENVIRONMENT VARIABLES 💅

The following environment variables shall affect the execution of tsort:

  • LANG — Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of POSIX.1‐2017, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.) 🌍
  • LC_ALL — If set to a non-empty string value, override the values of all the other internationalization variables. she said "i'm in charge now" 👑
  • LC_CTYPE — Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments and input files). 🦋
  • LC_MESSAGES — Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error. 💬
  • NLSPATH — Determine the location of message catalogs for the processing of LC_MESSAGES. 📍

🔥 ASYNCHRONOUS EVENTS 🔥

Default.

⭐ STDOUT ⭐

The standard output shall be a text file consisting of the order list produced from the partially ordered input. that's the payoff bestie, that's the whole gift. 🎁

🌈 STDERR 🌈

The standard error shall be used only for diagnostic messages. like, only when something's wrong. she's not chatty otherwise. 🙈

🍓 OUTPUT FILES 🍓

None.

🧚 EXTENDED DESCRIPTION 🧚

None.

💖 EXIT STATUS 💖

The following exit values shall be returned:

  1. 0 — Successful completion. 🎉
  2. >0 — An error occurred. 😭

🦋 CONSEQUENCES OF ERRORS 🦋

Default.

The following sections are informative. (yes bestie, we're entering the informative zone, it's chill in here)

💜 APPLICATION USAGE 💜

The LC_COLLATE variable need not affect the actions of tsort. The output ordering is not lexicographic, but depends on the pairs of items given as input. 🫶

so don't come in here expecting alphabetical, okay?? it's ordering-by-vibes, where "vibes" means "the actual dependency pairs you gave it." periodt.

✨ EXAMPLES ✨

The command:

tsort <<EOF
a b c c d e
g g
f g e f
h h
EOF

produces the output:

a
b
c
d
e
f
g
h

look at her go. absolutely ate. 🔥

🎀 RATIONALE 🎀

None.

🌸 FUTURE DIRECTIONS 🌸

None.

🧚 SEE ALSO 🧚

The Base Definitions volume of POSIX.1‐2017, Chapter 8, Environment Variables

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

and that's the whole page bestie!! 💖 this one's from IEEE/The Open Group, 2017, and it's TSORT(1POSIX) — go sort something topologically, you main character. 🎀✨🦋

📦 where this page comes from