diff options
Diffstat (limited to 'winsup/doc/filemodes.sgml')
| -rw-r--r-- | winsup/doc/filemodes.sgml | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/winsup/doc/filemodes.sgml b/winsup/doc/filemodes.sgml deleted file mode 100644 index b0bac2e..0000000 --- a/winsup/doc/filemodes.sgml +++ /dev/null @@ -1,34 +0,0 @@ -<sect1 id="using-filemodes"><title>File permissions</title> - -<para>On Windows 9x systems, files are always readable, and Cygwin uses the -native read-only mode 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>Under NT, file permissions default to the same behavior as Windows -9x but there is optional functionality in Cygwin that can make file -systems behave more like on UNIX systems. This is turned on by adding -the "ntea" option to the <EnVar>CYGWIN</EnVar> environment variable.</para> - -<para>When the "ntea" feature is activated, Cygwin will start with basic -permissions as determined above, but can store POSIX file permissions in NT -Extended Attributes. This feature works quite well on NTFS partitions -because the attributes can be stored sensibly inside the normal NTFS -filesystem structure. However, on a FAT partition, NT stores extended -attributes in a flat file at the root of the partition called <filename>EA -DATA. SF</filename>. This file can grow to extremely large sizes if you -have a large number of files on the partition in question, slowing the -system to a crawl. In addition, the <filename>EA DATA. SF</filename> file -can only be deleted outside of Windows because of its "in use" status. For -these reasons, the use of NT Extended Attributes is off by default in -Cygwin. Finally, note that specifying "ntea" in <EnVar>CYGWIN</EnVar> has no -effect under Windows 9x. </para> - -<para>Under NT, the test "[ -w filename]" is only true if filename is -writable across the board, e.g. <command>chmod +w filename</command>. </para> - -</sect1> - |