asa.1p (6035B)
- '\" et
- .TH ASA "1P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
- .\"
- .SH 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.
- .\"
- .SH NAME
- asa
- \(em interpret carriage-control characters
- .SH SYNOPSIS
- .LP
- .nf
- asa \fB[\fIfile\fR...\fB]\fR
- .fi
- .SH DESCRIPTION
- The
- .IR asa
- utility shall write its input files to standard output, mapping
- carriage-control characters from the text files to line-printer control
- sequences in an implementation-defined manner.
- .P
- The first character of every line shall be removed from the input, and
- the following actions are performed.
- .P
- If the character removed is:
- .IP <space> 10
- The rest of the line is output without change.
- .IP 0 10
- A
- <newline>
- is output, then the rest of the input line.
- .IP 1 10
- One or more implementation-defined characters that causes an advance
- to the next page shall be output, followed by the rest of the input
- line.
- .IP "\fR+\fP" 10
- The
- <newline>
- of the previous line shall be replaced with one or more
- implementation-defined characters that causes printing to return to
- column position 1, followed by the rest of the input line. If the
- .BR '\(pl'
- is the first character in the input, it shall be equivalent to
- <space>.
- .P
- The action of the
- .IR asa
- utility is unspecified upon encountering any character other than those
- listed above as the first character in a line.
- .SH OPTIONS
- None.
- .SH OPERANDS
- .IP "\fIfile\fR" 10
- A pathname of a text file used for input. If no
- .IR file
- operands are specified, the standard input shall be used.
- .SH STDIN
- The standard input shall be used if no
- .IR file
- operands are specified, and shall be used if a
- .IR file
- operand is
- .BR '\-'
- and the implementation treats the
- .BR '\-'
- as meaning standard input.
- Otherwise, the standard input shall not be used.
- See the INPUT FILES section.
- .SH "INPUT FILES"
- The input files shall be text files.
- .SH "ENVIRONMENT VARIABLES"
- The following environment variables shall affect the execution of
- .IR asa :
- .IP "\fILANG\fP" 10
- Provide a default value for the internationalization variables that are
- unset or null. (See the Base Definitions volume of POSIX.1\(hy2017,
- .IR "Section 8.2" ", " "Internationalization Variables"
- for the precedence of internationalization variables used to determine
- the values of locale categories.)
- .IP "\fILC_ALL\fP" 10
- If set to a non-empty string value, override the values of all the
- other internationalization variables.
- .IP "\fILC_CTYPE\fP" 10
- 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).
- .IP "\fILC_MESSAGES\fP" 10
- .br
- Determine the locale that should be used to affect the format and
- contents of diagnostic messages written to standard error.
- .IP "\fINLSPATH\fP" 10
- Determine the location of message catalogs for the processing of
- .IR LC_MESSAGES .
- .SH "ASYNCHRONOUS EVENTS"
- Default.
- .SH STDOUT
- The standard output shall be the text from the input file modified as
- described in the DESCRIPTION section.
- .SH STDERR
- None.
- .SH "OUTPUT FILES"
- None.
- .SH "EXTENDED DESCRIPTION"
- None.
- .SH "EXIT STATUS"
- The following exit values shall be returned:
- .IP "\00" 6
- All input files were output successfully.
- .IP >0 6
- An error occurred.
- .SH "CONSEQUENCES OF ERRORS"
- Default.
- .LP
- .IR "The following sections are informative."
- .SH "APPLICATION USAGE"
- None.
- .SH EXAMPLES
- .IP " 1." 4
- The following command:
- .RS 4
- .sp
- .RS 4
- .nf
- asa \fIfile\fR
- .fi
- .P
- .RE
- .P
- permits the viewing of
- .IR file
- (created by a program using FORTRAN-style carriage-control characters)
- on a terminal.
- .RE
- .IP " 2." 4
- The following command:
- .RS 4
- .sp
- .RS 4
- .nf
- a.out | asa | lp
- .fi
- .P
- .RE
- .P
- formats the FORTRAN output of
- .BR a.out
- and directs it to the printer.
- .RE
- .SH RATIONALE
- The
- .IR asa
- utility is needed to map ``standard'' FORTRAN 77 output into a form
- acceptable to contemporary printers. Usually,
- .IR asa
- is used to pipe data to the
- .IR lp
- utility; see
- .IR lp .
- .P
- This utility is generally used only by FORTRAN programs. The
- standard developers decided to retain
- .IR asa
- to avoid breaking the historical large base of FORTRAN applications
- that put carriage-control characters in their output files. There is no
- requirement that a system have a FORTRAN compiler in order to run
- applications that need
- .IR asa .
- .P
- Historical implementations have used an ASCII
- <form-feed>
- in response to a 1 and an ASCII
- <carriage-return>
- in response to a
- .BR '\(pl' .
- It is suggested that implementations treat characters other than 0, 1,
- and
- .BR '\(pl'
- as
- <space>
- in the absence of any compelling reason to do otherwise. However, the
- action is listed here as ``unspecified'', permitting an implementation
- to provide extensions to access fast multiple-line slewing and channel
- seeking in a non-portable manner.
- .SH "FUTURE DIRECTIONS"
- None.
- .SH "SEE ALSO"
- .IR "\fIfort77\fR\^",
- .IR "\fIlp\fR\^"
- .P
- The Base Definitions volume of POSIX.1\(hy2017,
- .IR "Chapter 8" ", " "Environment Variables"
- .\"
- .SH COPYRIGHT
- 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 .
- .PP
- 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 .