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