/// <summary>
/// Attempts to change the owner of the <paramref name="filename"/> to <paramref name="user"/>.
/// </summary>
/// <param name="ctx">Runtime context.</param>
/// <param name="filename">Path to the file to change owner.</param>
/// <param name="user">A <see cref="string"/> or <see cref="int"/> identifier of the target group.</param>
/// <returns>Whether the function succeeded.</returns>
public static bool chown(Context ctx, string filename, PhpValue user)
{
if (PhpPath.ResolvePath(ctx, ref filename, false, out var wrapper))
{
var fs = new FileSecurity(filename, AccessControlSections.Owner); // throws if file does not exist or no permissions
IdentityReference identity;
if (user.IsString(out var uname))
{
var sepidx = uname.IndexOf('/');
var domain_user = sepidx >= 0
? (uname.Remove(sepidx), uname.Substring(sepidx + 1))
: (null, uname);
identity = new NTAccount(domain_user.Item1, domain_user.Item2);
}
//else if (user.IsLong(out var uid))
//{
//}
else
{
PhpException.InvalidArgumentType(nameof(user), PhpVariable.TypeNameString);
return(false);
}
//var identity = user.IsString(out var uname) ? new NTAccount(uname) : user.IsLong(out var uid) ? new IdentityReference(...) : null;
fs.SetOwner(identity); // throws if no permission or error
return(true);
}
//
return(false);
}
/// <summary>
/// Changes file permissions.
/// </summary>
/// <remarks>
/// On Windows platform this function supports only the
/// <c>_S_IREAD (0400)</c> and <c>_S_IWRITE (0200)</c>
/// options (set read / write permissions for the file owner).
/// Note that the constants are octal numbers.
/// </remarks>
/// <param name="ctx">Runtime context.</param>
/// <param name="path">Path to the file to change group.</param>
/// <param name="mode">New file permissions (see remarks).</param>
/// <returns><c>true</c> on success, <c>false</c> on failure.</returns>
public static bool chmod(Context ctx, string path, int mode)
{
StreamWrapper wrapper;
if (!PhpPath.ResolvePath(ctx, ref path, false, out wrapper))
{
return(false);
}
bool isDir = PhpPath.is_dir(ctx, path);
FileSystemInfo fInfo = isDir
? (FileSystemInfo) new DirectoryInfo(path)
: new FileInfo(path);
if (!fInfo.Exists)
{
//PhpException.Throw(PhpError.Warning, CoreResources.GetString("invalid_path", path));
// TODO: Err invalid_path
return(false);
}
//Directories has no equivalent of a readonly flag,
//instead, their content permission should be adjusted accordingly
//[http://msdn.microsoft.com/en-us/library/system.security.accesscontrol.directorysecurity.aspx]
if (isDir)
{
return(false);
}
else
{
// according to <io.h> and <chmod.c> from C libraries in Visual Studio 2008
// and PHP 5.3 source codes, which are using standard _chmod() function in C
// on Windows it only changes the ReadOnly flag of the file
//
// see <chmod.c> for more details
/*
#define _S_IREAD 0x0100 // read permission, owner
#define _S_IWRITE 0x0080 // write permission, owner
#define _S_IEXEC 0x0040 // execute/search permission, owner
*/
((FileInfo)fInfo).IsReadOnly = ((mode & 0x0080) == 0);
}
return(true);
}