scripts

Test-FileTypeMagicNumber.ps1

SYNOPSIS

Tests for a given common file type by magic number.

SYNTAX

Test-FileTypeMagicNumber.ps1 [-FileType] <String> [[-Path] <String>] [-ProgressAction <ActionPreference>]
 [<CommonParameters>]

DESCRIPTION

EXAMPLES

EXAMPLE 1

Test-FileTypeMagicNumber.ps1 utf8 README.md

True if a utf-8 signature (or “BOM”, byte-order-mark) is found.

EXAMPLE 2

Test-FileTypeMagicNumber.ps1 png avatar.png

True if avatar.png contains the expected png magic number.

PARAMETERS

-FileType

The file type to test for.

This is generally the MIME subtype or Unicode text encoding, with some exceptions.

Several types require the presence of an optional header or prefix for positive identification of a file type, such as “<?xml” for xml or “%YAML “ for yaml.

Text files require either a UTF BOM/SIG, or must end with a newline (U+000A) and not contain any NUL (U+0000) characters (in the first 1KB sampled), or just not contain any characters above 7-bit US-ASCII in the first 1KB.

Type: String
Parameter Sets: (All)
Aliases:

Required: True
Position: 1
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-Path

The file to test.

Type: String
Parameter Sets: (All)
Aliases: FullName

Required: False
Position: 2
Default value: None
Accept pipeline input: True (ByPropertyName)
Accept wildcard characters: False

-ProgressAction

Type: ActionPreference
Parameter Sets: (All)
Aliases: proga

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters.