Chmod Class Reference

Collaboration diagram for Chmod:

Classes
interface	Changer
class	TreeVisitor

Static Public Member Functions
static Changer	compile (String exprs)
static void	main (String[] args) throws IOException

Static Package Functions
static void	chmod (Path file, Changer changer)
static void	usage ()

Detailed Description

Sample code that changes the permissions of files in a similar manner to the chmod(1) program.

Definition at line 53 of file Chmod.java.

Member Function Documentation

chmod()

static void Chmod.chmod ( Path  file, Changer  changer  )

staticpackage

Changes the permissions of the file using the given Changer.

Definition at line 276 of file Chmod.java.

References Chmod.Changer.change(), and file.

Referenced by Chmod.TreeVisitor.preVisitDirectory(), and Chmod.TreeVisitor.visitFile().

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compile()

static Changer Chmod.compile ( String  exprs )

static

Compiles a list of one or more symbolic mode expressions that may be used to change a set of file permissions. This method is intended for use where file permissions are required to be changed in a manner similar to the UNIX chmod program.

The

exprs 

parameter is a comma separated list of expressions where each takes the form:

who operator [permissions]

where who is one or more of the characters

'u' 

,

'g' 

,

'o' 

, or

'a' 

meaning the owner (user), group, others, or all (owner, group, and others) respectively.

operator is the character

'+' 

,

'-' 

, or

'=' 

signifying how permissions are to be changed.

'+' 

means the permissions are added,

'-' 

means the permissions are removed, and

'=' 

means the permissions are assigned absolutely.

permissions is a sequence of zero or more of the following:

'r' 

for read permission,

'w' 

for write permission, and

'x' 

for execute permission. If permissions is omitted when assigned absolutely, then the permissions are cleared for the owner, group, or others as identified by who. When omitted when adding or removing then the expression is ignored.

The following examples demonstrate possible values for the

exprs 

parameter:

u=rw	Sets the owner permissions to be read and write.
ug+w	Sets the owner write and group write permissions.
u+w,o-rwx	Sets the owner write, and removes the others read, others write and others execute permissions.
o=	Sets the others permission to none (others read, others write and others execute permissions are removed if set)

Parameters

exprs

List of one or more symbolic mode expressions

Returns

A

Changer 

that may be used to changer a set of file permissions

Exceptions

IllegalArgumentException

If the value of the exprs parameter is invalid

Definition at line 115 of file Chmod.java.

Referenced by main().

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main()

static void Chmod.main ( String[]  args ) throws IOException

static

Definition at line 326 of file Chmod.java.

References compile(), file, and usage().

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usage()

static void Chmod.usage ( )

staticpackage

Definition at line 321 of file Chmod.java.

Referenced by main().

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The documentation for this class was generated from the following file:

• build/windows-installer/unpacked/java-se-8u41-ri/sample/nio/file/Chmod.java