объединить соответствующие или последующие строки файлов (merge corresponding or subsequent lines of files)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
paste — merge corresponding or subsequent lines of files
Синопсис (Synopsis)
paste [-s] [-d list] file...
Описание (Description)
The paste utility shall concatenate the corresponding lines of
the given input files, and write the resulting lines to standard
output.
The default operation of paste shall concatenate the
corresponding lines of the input files. The <newline> of every
line except the line from the last input file shall be replaced
with a <tab>.
If an end-of-file condition is detected on one or more input
files, but not all input files, paste shall behave as though
empty lines were read from the files on which end-of-file was
detected, unless the -s option is specified.
Параметры (Options)
The paste utility shall conform to the Base Definitions volume of
POSIX.1‐2017, Section 12.2, Utility Syntax Guidelines.
The following options shall be supported:
-d list Unless a <backslash> character appears in list, each
character in list is an element specifying a delimiter
character. If a <backslash> character appears in list,
the <backslash> character and one or more characters
following it are an element specifying a delimiter
character as described below. These elements specify
one or more delimiters to use, instead of the default
<tab>, to replace the <newline> of the input lines. The
elements in list shall be used circularly; that is,
when the list is exhausted the first element from the
list is reused. When the -s option is specified:
* The last <newline> in a file shall not be modified.
* The delimiter shall be reset to the first element
of list after each file operand is processed.
When the -s option is not specified:
* The <newline> characters in the file specified by
the last file operand shall not be modified.
* The delimiter shall be reset to the first element
of list each time a line is processed from each
file.
If a <backslash> character appears in list, it and the
character following it shall be used to represent the
following delimiter characters:
\n <newline>.
\t <tab>.
\\ <backslash> character.
\0 Empty string (not a null character). If '\0' is
immediately followed by the character 'x', the
character 'X', or any character defined by the
LC_CTYPE digit keyword (see the Base Definitions
volume of POSIX.1‐2017, Chapter 7, Locale), the
results are unspecified.
If any other characters follow the <backslash>, the
results are unspecified.
-s Concatenate all of the lines from each input file into
one line of output per file, in command line order. The
<newline> of every line except the last line in each
input file shall be replaced with a <tab>, unless
otherwise specified by the -d option. If an input file
is empty, the output line corresponding to that file
shall consist of only a <newline> character.
Операнды (Operands)
The following operand shall be supported:
file A pathname of an input file. If '-' is specified for
one or more of the files, the standard input shall be
used; the standard input shall be read one line at a
time, circularly, for each instance of '-'.
Implementations shall support pasting of at least 12
file operands.
Стандартный ввод (Stdin)
The standard input shall be used only if one or more file
operands is '-'. See the INPUT FILES section.
Входные файлы (Input files)
The input files shall be text files, except that line lengths
shall be unlimited.
Переменные окружения (Environment variables)
The following environment variables shall affect the execution of
paste:
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 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.
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.
Асинхронные события (Asynchronous events)
Default.
Стандартный вывод (Stdout)
Concatenated lines of input files shall be separated by the <tab>
(or other characters under the control of the -d option) and
terminated by a <newline>.
Стандартный вывод сообщений (Stderr)
The standard error shall be used only for diagnostic messages.
Выходные файлы (Output files)
None.
Расширенное описание (Extended description)
None.
Статус выхода (Exit)
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
Последствия ошибок (Consequences of errors)
If one or more input files cannot be opened when the -s option is
not specified, a diagnostic message shall be written to standard
error, but no output is written to standard output. If the -s
option is specified, the paste utility shall provide the default
behavior described in Section 1.4, Utility Description Defaults.
The following sections are informative.
Использование в приложениях (Application usage)
When the escape sequences of the list option-argument are used in
a shell script, they must be quoted; otherwise, the shell treats
the <backslash> as a special character.
Conforming applications should only use the specific
<backslash>-escaped delimiters presented in this volume of
POSIX.1‐2017. Historical implementations treat '\x', where 'x' is
not in this list, as 'x', but future implementations are free to
expand this list to recognize other common escapes similar to
those accepted by printf and other standard utilities.
Most of the standard utilities work on text files. The cut
utility can be used to turn files with arbitrary line lengths
into a set of text files containing the same data. The paste
utility can be used to create (or recreate) files with arbitrary
line lengths. For example, if file contains long lines:
cut -b 1-500 -n file > file1
cut -b 501- -n file > file2
creates file1 (a text file) with lines no longer than 500 bytes
(plus the <newline>) and file2 that contains the remainder of the
data from file. Note that file2 is not a text file if there are
lines in file that are longer than 500 + {LINE_MAX} bytes. The
original file can be recreated from file1 and file2 using the
command:
paste -d "\0" file1 file2 > file
The commands:
paste -d "\0" ...
paste -d "" ...
are not necessarily equivalent; the latter is not specified by
this volume of POSIX.1‐2017 and may result in an error. The
construct '\0' is used to mean ``no separator'' because
historical versions of paste did not follow the syntax
guidelines, and the command:
paste -d"" ...
could not be handled properly by getopt().
Примеры (Examples)
1. Write out a directory in four columns:
ls | paste - - - -
2. Combine pairs of lines from a file into single lines:
paste -s -d "\t\n" file
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
Section 1.4, Utility Description Defaults, cut(1p), grep(1p),
pr(1p)
The Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale,
Chapter 8, Environment Variables, Section 12.2, Utility Syntax
Guidelines
