| <?xml version="1.0" encoding='UTF-8'?> |
| <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook V4.5//EN" |
| "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> |
| |
| <sect1 id="using-filemodes"><title>File permissions</title> |
| |
| <para>On FAT or FAT32 filesystems, files are always readable, and Cygwin |
| uses the DOS read-only attribute to determine if they are writable. Files are |
| considered to be executable if the filename ends with .bat, .com or .exe, or |
| if its content starts with #!. Consequently <command>chmod</command> can |
| only affect the "w" mode, it silently ignores actions involving the other |
| modes. This means that <command>ls -l</command> |
| needs to open and read files. It can thus be relatively slow.</para> |
| |
| <para>On NTFS, file permissions are evaluated using the Access Control |
| Lists (ACLs) attached to a file. This can be switched off by using the |
| "noacl" option to the respective mount point in the |
| <filename>/etc/fstab</filename> or <filename>/etc/fstab.d/$USER</filename> |
| file. For more information on file permissions, see |
| |
| <!-- TODO: Put the file permission stuff from ntsec here??? --> |
| |
| <xref linkend="ntsec"></xref>. |
| </para> |
| |
| <!-- TODO --> |
| |
| <para>On NFS shares, file permissions are exactly the POSIX permissions |
| transmitted from the server using the NFSv3 protocol, if the NFS client |
| is the one from Microsoft's "Services For Unix", or the one built into |
| Windows Vista or later. |
| </para> |
| |
| <para>Only the user and group ownership is not necessarily correct.</para> |
| |
| </sect1> |
| |
