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Informations about the package io-info
- Library to provide information on any device
IOMode is based on a [[https://stackoverflow.com/a/11327451][StackOverflow answer]] and incorportes that code into a reusable library.
From SO:
+begin_quote
I also needed a slightly more flexible solution than posix_isatty that could detect:
Is the script being run from the terminal
Is the script receiving data via a pipe or from a file
Is the output being redirected to a file+end_quote
** Example
This library can be used in the following way:
+begin_src php
use Hexmode\IOMode;
if ( IOMode::isTTY() ) { print "tty\n"; } if ( IOMode::isFifo() ) { print "pipe\n"; } if ( IOMode::isReg() ) { print "regular file (redirection)\n"; } if ( IOMode::isChr() ) { print "character device (normal)\n"; } if ( IOMode::isDir() ) { print "directory (?!?!)\n"; } if ( IOMode::isBlk() ) { print "block device\n"; } if ( IOMode::isLnk() ) { print "symlink\n"; } if ( IOMode::isSock() ) { print "socket\n"; }
+end_src
(This above script is in the included =example/doc1.php=.)
Given the following commands, you'll get different output:
+begin_example
$ php example/doc1.php tty character device (normal) $ echo 1 | php example/doc1.php pipe $ mkdir tmp; php example/doc1.php < tmp;rmdir tmp directory (?!?!) $ sudo sh -c ‘php example/doc1.php> < /dev/sda1' block device
+end_example
* Using with other handles In addition to the is() static methods that provide information on STDIN, there are methods that can be invoked on a =IOMode= object.
The following code is included as =example/doc2.php=:
+begin_src php
require( "vendor/autoload.php" ); use Hexmode\IOMode\IOMode;
$stderr = new IOMode( STDERR ); $stdout = new IOMode( STDOUT ); $stdin = new IOMode( STDIN );
foreach ( [ "in" => $stdin, "out" => $stdout, "err" => $stderr ] as $label => $io ) { if ( $io->TTY() ) { print "$label: tty\n"; } if ( $io->Fifo() ) { print "$label: pipe\n"; } if ( $io->Reg() ) { print "$label: regular file (redirection)\n"; } if ( $io->Chr() ) { print "$label: character device (normal)\n"; } if ( $io->Dir() ) { print "$label: directory (?!?!)\n"; } if ( $io->Blk() ) { print "$label: block device\n"; } if ( $io->Lnk() ) { print "$label: symlink\n"; } if ( $io->Sock() ) { print "$label: socket\n"; } }
+end_src
Given the following commands, you'll get different output:
+begin_example
$ sudo sh -c 'php example/doc2.php < /dev/nvme0n1p1' in: block device out: tty out: character device (normal) err: tty err: character device (normal) $ mkdir tmp; php example/doc2.php < tmp 2> /tmp/t;rmdir tmp in: directory (?!?!) out: tty out: character device (normal) err: regular file (redirection) $ example/doc2.php > /tmp/t $ cat /tmp/t; rm /tmp/t in: tty in: character device (normal) out: regular file (redirection) err: tty err: character device (normal)
