Modern Fs SetPosixMode

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SetPosixMode

Sets a file's permission bits on Linux and macOS; fails as unsupported on Windows.

Syntax

SetPosixMode( p, mode )

Notes

• FS_UNSUPPORTED on Windows

Examples

#import "std/fs"
using fs

dim td as FsResultUStr = CreateTempDir( "fbdoc" )
dim as ustring dir_ = td.Value( )
dim as ustring p = PathJoin( dir_, "f.txt" )
WriteAllText( p, "hello" )

'' POSIX ONLY, like GetPosixMode: on Windows every call fails with
'' FS_UNSUPPORTED, including the ones that look harmless.
dim r as FsResultBool = SetPosixMode( p, &o644 )

print r.IsOk( )              '' FALSE on Windows
if r.IsOk( ) = false then
    print r.Failure( ).Code( ) = FS_UNSUPPORTED      '' -1 (true)
end if

'' Use SetReadOnly for the portable question -- it is the read-only
'' attribute on Windows and the owner write bit on POSIX, which is the
'' same operation on each platform's own model
print SetReadOnly( p, true ).IsOk( )      '' true, on both
SetReadOnly( p, false )

RemoveDirAll( dir_ )

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Library: Filesystem Library
Category: Filesystem
Documented under: Links And Permissions