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author | Indrajith K L | 2022-12-03 17:00:20 +0530 |
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committer | Indrajith K L | 2022-12-03 17:00:20 +0530 |
commit | f5c4671bfbad96bf346bd7e9a21fc4317b4959df (patch) | |
tree | 2764fc62da58f2ba8da7ed341643fc359873142f /coreutils-5.3.0-bin/man/cat1p/tty.1p.txt | |
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Diffstat (limited to 'coreutils-5.3.0-bin/man/cat1p/tty.1p.txt')
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diff --git a/coreutils-5.3.0-bin/man/cat1p/tty.1p.txt b/coreutils-5.3.0-bin/man/cat1p/tty.1p.txt new file mode 100644 index 0000000..21dcb4a --- /dev/null +++ b/coreutils-5.3.0-bin/man/cat1p/tty.1p.txt @@ -0,0 +1,152 @@ +tty(P) tty(P) + + + + + +NAME + tty - return user's terminal name + +SYNOPSIS + tty + +DESCRIPTION + The tty utility shall write to the standard output the + name of the terminal that is open as standard input. The + name that is used shall be equivalent to the string that + would be returned by the ttyname() function defined in + the System Interfaces volume of IEEE Std 1003.1-2001. + +OPTIONS + The tty utility shall conform to the Base Definitions + volume of IEEE Std 1003.1-2001, Section 12.2, Utility + Syntax Guidelines. + +OPERANDS + None. + +STDIN + While no input is read from standard input, standard + input shall be examined to determine whether or not it + is a terminal, and, if so, to determine the name of the + terminal. + +INPUT FILES + None. + +ENVIRONMENT VARIABLES + The following environment variables shall affect the + execution of tty: + + LANG Provide a default value for the internationaliza- + tion variables that are unset or null. (See the + Base Definitions volume of IEEE Std 1003.1-2001, + Section 8.2, Internationalization Variables for + the precedence of internationalization variables + used to determine the values of locale cate- + gories.) + + 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). + + LC_MESSAGES + Determine the locale that should be used to + affect the format and contents of diagnostic mes- + sages written to standard error and informative + messages written to standard output. + + NLSPATH + Determine the location of message catalogs for + the processing of LC_MESSAGES . + + +ASYNCHRONOUS EVENTS + Default. + +STDOUT + If standard input is a terminal device, a pathname of + the terminal as specified by the ttyname() function + defined in the System Interfaces volume of + IEEE Std 1003.1-2001 shall be written in the following + format: + + + "%s\n", <terminal name> + + Otherwise, a message shall be written indicating that + standard input is not connected to a terminal. In the + POSIX locale, the tty utility shall use the format: + + + "not a tty\n" + +STDERR + The standard error shall be used only for diagnostic + messages. + +OUTPUT FILES + None. + +EXTENDED DESCRIPTION + None. + +EXIT STATUS + The following exit values shall be returned: + + 0 Standard input is a terminal. + + 1 Standard input is not a terminal. + + >1 An error occurred. + + +CONSEQUENCES OF ERRORS + Default. + + The following sections are informative. + +APPLICATION USAGE + This utility checks the status of the file open as stan- + dard input against that of an implementation-defined set + of files. It is possible that no match can be found, or + that the match found need not be the same file as that + which was opened for standard input (although they are + the same device). + +EXAMPLES + None. + +RATIONALE + None. + +FUTURE DIRECTIONS + None. + +SEE ALSO + The System Interfaces volume of IEEE Std 1003.1-2001, + isatty(), ttyname() + +COPYRIGHT + Portions of this text are reprinted and reproduced in + electronic form from IEEE Std 1003.1, 2003 Edition, + Standard for Information Technology -- Portable Operat- + ing System Interface (POSIX), The Open Group Base + Specifications Issue 6, Copyright (C) 2001-2003 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.open- + group.org/unix/online.html . + + + +POSIX 2003 tty(P) |