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author | Joshua Daniel Franklin <joshuadfranklin@yahoo.com> | 2005-08-06 05:14:41 +0000 |
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committer | Joshua Daniel Franklin <joshuadfranklin@yahoo.com> | 2005-08-06 05:14:41 +0000 |
commit | 2041777dee6626ba0905ceb91f5d2cdb74d29a09 (patch) | |
tree | d2bf919ae209d7edad75466b4ccdd88d6defa823 /winsup/doc/faq-using.xml | |
parent | 7d7e7a21b13a722a6f6d23d6b7424dbc26d44534 (diff) | |
download | cygnal-2041777dee6626ba0905ceb91f5d2cdb74d29a09.tar.gz cygnal-2041777dee6626ba0905ceb91f5d2cdb74d29a09.tar.bz2 cygnal-2041777dee6626ba0905ceb91f5d2cdb74d29a09.zip |
Update to switch FAQ from texinfo to DocBook.
Diffstat (limited to 'winsup/doc/faq-using.xml')
-rw-r--r-- | winsup/doc/faq-using.xml | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/winsup/doc/faq-using.xml b/winsup/doc/faq-using.xml new file mode 100644 index 000000000..ce66c9de2 --- /dev/null +++ b/winsup/doc/faq-using.xml @@ -0,0 +1,951 @@ +<!-- faq-problems.xml --> +<qandaentry id="faq.using.missing-dlls"> +<question><para>Why can't my application locate cygncurses5.dll? or cygintl.dll? or cygreadline5.dll? or ...?</para></question> +<answer> + +<para>If you upgraded recently, and suddenly vim (or some other Cygwin +application) cannot find <literal>cygncurses5.dll</literal>, it probably means that you did +not follow these instructions properly: +<ulink url="http://cygwin.com/ml/cygwin-announce/2001/msg00124.html">http://cygwin.com/ml/cygwin-announce/2001/msg00124.html</ulink>. To +repair the damage, you must run Cygwin Setup again, and re-install the +<literal>libncurses5</literal> package. +</para> +<para>Note that Cygwin Setup won't show this option by default. In the +``Select packages to install'' dialog, click on the <literal>Full/Part</literal> +button. This lists all packages, even those that are already +installed. Scroll down to locate the <literal>libncurses5</literal> package. +Click on the ``cycle'' glyph until it says ``Reinstall''. Continue +with the installation. +</para> +<para>Similarly, if something cannot find <literal>cygintl.dll</literal>, then run +Cygwin Setup and re-install the <literal>libintl</literal> and <literal>libintl1</literal> +packages. +</para> +<para>For a detailed explanation of the general problem, and how to extend +it to other missing DLLs (like cygreadline5.dll) and identify their +containing packages, see +<ulink url="http://cygwin.com/ml/cygwin/2002-01/msg01619.html">http://cygwin.com/ml/cygwin/2002-01/msg01619.html</ulink>. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.slow"> +<question><para>Why is Cygwin suddenly <emphasis>so</emphasis> slow?</para></question> +<answer> + +<para>If you recently upgraded and suddenly <emphasis>every</emphasis> command takes a +<emphasis>very</emphasis> long time, then something is probably attempting to +access a network share. You may have the obsolete <literal>//c</literal> +notation in your PATH or startup files. This now means the +<emphasis>network share</emphasis> <literal>c</literal>, which will slow things down +tremendously if it does not exist. +</para> +<para>Using //c (for C:) doesn't work anymore. (Similarly for any drive +letter, e.g. <literal>//z</literal> for <literal>Z:</literal>) This ``feature'' has long been +deprecated, and no longer works at all in the latest release. As of +release 1.3.3, <literal>//c</literal> now means the <emphasis>network share</emphasis> <literal>c</literal>. +For a detailed discussion of why this change was made, and how deal +with it now, refer to +<ulink url="http://sources.redhat.com/ml/cygwin/2001-09/msg00014.html">http://sources.redhat.com/ml/cygwin/2001-09/msg00014.html</ulink>. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.services"> +<question><para>Why don't my services work (or access network shares)?</para></question> +<answer> + +<para>Most Windows services run as a special user called <literal>SYSTEM</literal>. If you +installed Cygwin for "Just Me", the <literal>SYSTEM</literal> user won't see your +Cygwin mount table. You need to re-mount all of your mounts as +"system" for services to work. You can re-run <literal>setup.exe</literal> and +select "Install for All Users", or this script will do the trick: +</para> +<screen> +eval "`mount -m | sed -e 's/ -u / -s /g' -e 's/$/;/'`" +</screen> + +<para>The <literal>SYSTEM</literal> user cannot access network shares that require +authentication. For more information, see +<ulink url="http://cygwin.com/cygwin-ug-net/ntsec.html">http://cygwin.com/cygwin-ug-net/ntsec.html</ulink>. +</para> +<para>Workarounds include using public network share that does not require +authentication (for non-critical files), or running the service as +your own user with <literal>cygrunsrv -u</literal> (see +<literal>/usr/share/doc/Cygwin/cygrunsrv.README</literal> for more information). +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.path"> +<question><para>How should I set my PATH?</para></question> +<answer> + +<para>This is done for you in the file /etc/profile, which is sourced by bash +when you start it from the Desktop or Start Menu shortcut, created by +<literal>setup.exe</literal>. The line is +</para> +<screen> + PATH="/usr/local/bin:/usr/bin:/bin:$PATH" +</screen> + +<para>Effectively, this <emphasis role='bold'>prepends</emphasis> /usr/local/bin and /usr/bin to your +Windows system path. If you choose to reset your PATH, say in +$HOME/.bashrc, or by editing etc/profile directly, then you should +follow this rule. You <emphasis role='bold'>must</emphasis> have <literal>/usr/bin</literal> in your PATH +<emphasis role='bold'>before</emphasis> any Windows system directories. (And you must not omit +the Windows system directories!) Otherwise you will likely encounter +all sorts of problems running Cygwin applications. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.not-found"> +<question><para>Bash says "command not found", but it's right there!</para></question> +<answer> + +<para>If you compile a program, you might find that you can't run it: +</para> +<screen> + bash$ gcc -o hello hello.c + bash$ hello + bash: hello: command not found +</screen> + +<para>Unlike Windows, bash does not look for programs in <literal>.</literal> (the current +directory) by default. You can add <literal>.</literal> to your PATH (see above), +but this is not recommended (at least on UNIX) for security reasons. +Just tell bash where to find it, when you type it on the command line: +</para> +<screen> + bash$ gcc -o hello hello.c + bash$ ./hello + Hello World! +</screen> + +</answer></qandaentry> + +<qandaentry id="faq.using.converting-paths"> +<question><para>How do I convert between Windows and UNIX paths?</para></question> +<answer> + +<para>Use the 'cygpath' utility. Type '<literal>cygpath --help</literal>' for +information. For example (on my installation): +<screen> + bash$ cygpath --windows ~/.bashrc + D:\starksb\.bashrc + bash$ cygpath --unix C:/cygwin/bin/cygwin.bat + /usr/bin/cygwin.bat + bash$ cygpath --unix C:\\cygwin\\bin\\cygwin.bat + /usr/bin/cygwin.bat +</screen> +Note that bash interprets the backslash '\' as an escape character, so +you must type it twice in the bash shell if you want it to be recognized +as such. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.bashrc"> +<question><para>Why doesn't bash read my .bashrc file on startup?</para></question> +<answer> + +<para>Your .bashrc is read from your home directory specified by the HOME +environment variable. It uses /.bashrc if HOME is not set. So you need +to set HOME correctly, or move your .bashrc to the top of the drive +mounted as / in Cygwin. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.bash-insensitive"> +<question><para>How can I get bash filename completion to be case insensitive?</para></question> +<answer> + +<para>Add the following to your <literal>~/.bashrc</literal> file: +</para> +<screen> + shopt -s nocaseglob +</screen> + +<para>and add the following to your <literal>~/.inputrc</literal> file: +</para> +<screen> + set completion-ignore-case on +</screen> + +</answer></qandaentry> + +<qandaentry id="faq.using.filename-spaces"> +<question><para>Can I use paths/filenames containing spaces in them?</para></question> +<answer> + +<para>Cygwin does support spaces in filenames and paths. That said, some +utilities that use the library may not, since files don't typically +contain spaces in Unix. If you stumble into problems with this, you +will need to either fix the utilities or stop using spaces in filenames +used by Cygwin tools. +</para> +<para>In particular, bash interprets space as a word separator. You would have +to quote a filename containing spaces, or escape the space character. +For example: +<screen> + bash-2.03$ cd '/cygdrive/c/Program Files' +</screen> +or +<screen> + bash-2.03$ cd /cygdrive/c/Program\ Files +</screen> +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.shortcuts"> +<question><para>Why can't I cd into a shortcut to a directory?</para></question> +<answer> + +<para>Cygwin versions < 1.3.0 do not follow MS Windows Explorer Shortcuts +(*.lnk files). It sees a shortcut as a regular file and this you +cannot "cd" into it. +</para> +<para>Since version 1.3.0, Cygwin uses shortcuts as symlinks by default. +</para> +<para>Cygwin shortcuts are different from shortcuts created by native Windows +applications. Windows applications can usually make use of Cygwin +shortcuts but not vice versa. This is by choice. The reason is that +Windows shortcuts may contain a bunch of extra information which would +get lost, if, for example, Cygwin tar archives and extracts them as +symlinks. +</para> +<para>Changing a Cygwin shortcut in Windows Explorer usually changes a Cygwin +shortcut into a Windows native shortcut. Afterwards, Cygwin will not +recognize it as symlink anymore. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.find"> +<question><para>I'm having basic problems with find. Why?</para></question> +<answer> + +<para>Make sure you are using the find that came with Cygwin and that you +aren't picking up the Win32 find command instead. You can verify that +you are getting the right one by doing a "type find" in bash. +</para> +<para>If the path argument to find, including current directory (default), is +itself a symbolic link, then find will not traverse it unless you +specify the <literal>-follow</literal> option. This behavior is different than most +other UNIX implementations, but is not likely to change. +</para> +<para>If find does not seem to be producing enough results, or seems to be +missing out some directories, you may be experiencing a problem with one +of find's optimisations. The absence of <literal>.</literal> and <literal>..</literal> +directories on some filesystems, such as DVD-R UDF, can confuse find. +See the documentation for the option <literal>-noleaf</literal> in the man page. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.su"> +<question><para>Why doesn't <literal>su</literal> work?</para></question> +<answer> + +<para>The <literal>su</literal> command has been in and out of Cygwin distributions, but +it has not been ported to Cygwin and has never worked. It is +currently installed as part of the sh-utils, but again, it does not work. +</para> +<para>You may be able to use <literal>login</literal> instead, but you should read +<ulink url="http://www.cygwin.com/ml/cygwin/2001-03/msg00337.html">http://www.cygwin.com/ml/cygwin/2001-03/msg00337.html</ulink> first. +</para> +<para>For some technical background into why <literal>su</literal> doesn't work, read +<ulink url="http://www.cygwin.com/ml/cygwin/2003-06/msg00897.html">http://www.cygwin.com/ml/cygwin/2003-06/msg00897.html</ulink> and +related messages. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.man"> +<question><para>Why doesn't man (or apropos) work?</para></question> +<answer> + +<para>Before you can use <literal>man -k</literal> or <literal>apropos</literal>, you +must create the whatis database. Just run the command +</para> +<screen> + /usr/sbin/makewhatis +</screen> + +<para>(it may take a minute to complete). +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.chmod"> +<question><para>Why doesn't chmod work?</para></question> +<answer> + +<para><literal>ntsec</literal> will allow UNIX permissions in Windows NT on NTFS file +systems. This is on by default (a recent change). +</para> +<para><literal>ntea</literal> works on NTFS <emphasis>and</emphasis> FAT but it creates a huge, +<emphasis role='bold'>undeletable</emphasis> file on FAT filesystems. +</para> +<para>(The <literal>ntsec</literal> and <literal>ntea</literal> settings are values for the +<literal>CYGWIN</literal> environment variable. See the Cygwin User's Guide at +<ulink url="http://cygwin.com/cygwin-ug-net/cygwin-ug-net.html">http://cygwin.com/cygwin-ug-net/cygwin-ug-net.html</ulink> for more +information on this variable and its settings.) +</para> +<para>There is no solution at all for Windows 9x. +</para> +<para>If you have an application that requires a certain permission mode on a +file, you may be able to work around this requirement by modifying the +application's source code. For a hint, based on work done by Corinna +Vinschen for OpenSSH, see this message from the cygwin mailing list: +<ulink url="http://cygwin.com/ml/cygwin/2000-11/msg01176.html">http://cygwin.com/ml/cygwin/2000-11/msg01176.html</ulink>. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.mkdir-network"> +<question><para>Why doesn't <literal>mkdir -p</literal> work on a network share?</para></question> +<answer> + +<para>Starting with <literal>coreutils-5.3.0-6</literal> and <literal>cygwin-1.5.17</literal>, you can +do something like this: +</para> +<screen> +bash$ mkdir -p //MACHINE/Share/path/to/new/dir +</screen> + +<para>However, coreutils expects Unix path names, so something like +<literal>mkdir -p \\\\machine\\share\\path</literal> will fail. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.shell-scripts"> +<question><para>Why doesn't my shell script work?</para></question> +<answer> + +<para>There are two basic problems you might run into. One is the fact that +<command>/bin/sh</command> is really <command>bash</command> (prior to +<command>bash-3.0-6</command>, <command>/bin/sh</command> was ash). and is +missing some features you might expect in <command>/bin/sh</command>, +particularly if you are used to <command>/bin/sh</command> actually being +<command>zsh</command> (MacOS X "Panther") or <command>ksh</command> (Tru64). +</para> + +<para>Or, it could be a permission problem, and Cygwin doesn't understand that your script is executable. Because <literal>chmod</literal> may not work (see FAQ entry above), Cygwin must read the contents of files to determine if +they are executable. If your script does not start with +</para> +<screen> + #! /bin/sh +</screen> + +<para>(or any path to a script interpreter, it does not have to be /bin/sh) +then Cygwin will not know it is an executable script. The Bourne shell +idiom +</para> +<screen> + : + # This is the 2nd line, assume processing by /bin/sh +</screen> + +<para>also works. +</para> +<para>Note that you can use <literal>mount -x</literal> to force Cygwin to treat all files +under the mount point as executable. This can be used for individual +files as well as directories. Then Cygwin will not bother to read files +to determine whether they are executable. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.printing"> +<question><para>How do I print under Cygwin?</para></question> +<answer> + +<para>There is no working lp or lpr system as you would find on UNIX. +</para> +<para>Jason Tishler has written a couple of messages that explain how to use +a2ps (for nicely formatted text in PostScript) and ghostscript (to print +PostScript files on non-PostScript Windows printers). Start at +<ulink url="http://cygwin.com/ml/cygwin/2001-04/msg00657.html">http://cygwin.com/ml/cygwin/2001-04/msg00657.html</ulink>. Note that the +<literal>file</literal> command is now available as part of Cygwin setup. +</para> +<para>Alternatively, on NT, you can use the Windows <literal>print</literal> command. (It +does not seem to be available on Win9x.) Type +</para> +<screen> + bash$ print /\? +</screen> + +<para>for usage instructions (note the <literal>?</literal> must be escaped from the +shell). +</para> +<para>Finally, you can simply <literal>cat</literal> the file to the printer's share name: +</para> +<screen> + bash$ cat myfile > //host/printer +</screen> + +<para>You may need to press the formfeed button on your printer or append the +formfeed character to your file. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.unicode"> +<question><para>Why don't international (Unicode) characters work?</para></question> +<answer> + +<para>Internationalization is a complex issue. The short answer is that +Cygwin is not Unicode-aware, so things that might work in Linux will +not necessarily work on Cygwin. However, some things do work. To type +international characters (£äö) in <literal>bash</literal>, add the following +lines to your <literal>~/.inputrc</literal> file and restart <literal>bash</literal>: +</para> +<screen> + set meta-flag on + set convert-meta off + set output-meta on + set input-meta on + set kanji-code sjis + set meta-flag on +</screen> + +<para>These are options to the <literal>readline</literal> library, which you can read +about in the <literal>bash(1)</literal> and <literal>readline(3)</literal> man pages. Other +tools that do not use <literal>readline</literal> for display, such as <literal>less</literal> +and <literal>ls</literal>, require additional settings, which could be put in your +<literal>~/.bashrc</literal>: +<screen> +alias less='/bin/less -r' +alias ls='/bin/ls -F --color=tty --show-control-chars' +export LANG="ja_JP.SJIS" +export OUTPUT_CHARSET="sjis" +</screen> +These examples use the Japanese Shift-JIS character set, obviously +you will want to change them for your own locale. +</para> + +</answer></qandaentry> + +<qandaentry id="faq.using.cursor"> +<question><para>Why don't cursor keys work under Win95/Win98?</para></question> +<answer> + +<para><emphasis role='bold'>(Please note: This section has not yet been updated for the latest net release.)</emphasis> +</para> +<para>Careful examination shows that they not just non-functional, but +rather behave strangely, for example, with NumLock off, keys on numeric +keyboard work, until you press usual cursor keys, when even numeric +stop working, but they start working again after hitting alphanumeric +key, etc. This reported to happen on localized versions of Win98 and +Win95, and not specific to Cygwin; there are known cases of Alt+Enter +(fullscreen/windowed toggle) not working and shifts sticking with +other programs. The cause of this problem is Microsoft keyboard +localizer which by default installed in 'autoexec.bat'. Corresponding +line looks like: +</para> +<screen> +keyb ru,,C:\WINDOWS\COMMAND\keybrd3.sys +</screen> + +<para>(That's for russian locale.) You should comment that line if you want +your keys working properly. Of course, this will deprive you of your +local alphabet keyboard support, so you should think about +another localizer. ex-USSR users are of course knowledgeable of Keyrus +localizer, and it might work for other locales too, since it has keyboard +layout editor. But it has russian messages and documentation ;-( +Reference URL is http://www.hnet.ru/software/contrib/Utils/KeyRus/ +(note the you may need to turn off Windows logo for Keyrus to operate +properly). +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.multiple-copies"> +<question><para>Is it OK to have multiple copies of the DLL?</para></question> +<answer> + +<para>You should only have one copy of the Cygwin DLL on your system. If you +have multiple versions, they will conflict and cause problems. +</para> +<para>If you get the error "shared region is corrupted" or "shared region +version mismatch" it means you have multiple versions of cygwin1.dll +running at the same time. This could happen, for example, if you update +cygwin1.dll without exiting <emphasis>all</emphasis> Cygwin apps (including inetd) +beforehand. +</para> +<para>The only DLL that is sanctioned by the Cygwin project is the one that +you get by running <ulink url="http://cygwin.com/setup.exe">http://cygwin.com/setup.exe</ulink>, installed in the +directory controlled by this program. If you have other versions on +your system and desire help from the cygwin project, you should delete +or rename all DLLs that are not installed by <filename>setup.exe</filename>. +</para> +<para>If you're trying to find multiple versions of the DLL that are causing +this problem, reboot first, in case DLLs still loaded in memory are the +cause. Then use the Windows System find utility to search your whole +machine, not just components in your PATH (as 'type' would do) or +cygwin-mounted filesystems (as Cygwin 'find' would do). +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.missing-packages"> +<question><para>Why isn't package XYZ available in Cygwin?</para></question> +<answer> + +<para>Probably because there is nobody willing or able to maintain it. It +takes time, and the priority for the Cygwin Team is the Cygwin package. +The rest is a volunteer effort. Want to contribute? See +<ulink url="http://cygwin.com/setup.html">http://cygwin.com/setup.html</ulink>. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.old-packages"> +<question><para>Why is the Cygwin package of XYZ so out of date?</para></question> +<answer> + +<para>(Also: Why is the version of package XYZ older than the version that I +can download from the XYZ web site? Why is the version of package XYZ +older than the version that I installed on my linux system? Is there +something special about Cygwin which requires that only an older version +of package XYZ will work on it?) +</para> +<para>Every package in the Cygwin distribution has a maintainer who is +responsible for sending out updates of the package. This person is a +volunteer who is rarely the same person as the official developer of the +package. If you notice that a version of a package seems to be out of +date, the reason is usually pretty simple -- the person who is +maintaining the package hasn't gotten around to updating it yet. Rarely, +the newer package actually requires complex changes that the maintainer +is working out. +</para> +<para>If you urgently need an update, sending a polite message to the cygwin +mailing list pinging the maintainer is perfectly acceptable. There are +no guarantees that the maintainer will have time to update the package +or that you'll receive a response to your request, however. +</para> +<para>Remeber that the operative term here is "volunteer". +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.accessing-drives"> +<question><para>How can I access other drives?</para></question> +<answer> + +<para>You have some flexibility here. +</para> +<para>Cygwin has a builtin "cygdrive prefix" for drives that are not mounted. +You can access any drive, say Z:, as '/cygdrive/z/'. +</para> +<para>In some applications (notably bash), you can use the familiar windows +<drive>:/path/, using posix forward-slashes ('/') instead of Windows +backward-slashes ('\'). (But see the warning below!) This maps in the +obvious way to the Windows path, but will be converted internally to use +the Cygwin path, following mounts (default or explicit). For example: +<screen> + bash$ cd C:/Windows + bash$ pwd + /cygdrive/c/Windows +</screen> +and +<screen> + bash$ cd C:/cygwin + bash$ pwd + / +</screen> +for a default setup. You could also use backward-slashes in the +Windows path, but these would have to be escaped from the shell. +</para> +<para><emphasis role='bold'>Warning:</emphasis> There is some ambiguity in going from a Windows path +to the posix path, because different posix paths, through different +mount points, could map to the same Windows directory. This matters +because different mount points may be binmode or textmode, so the +behavior of Cygwin apps will vary depending on the posix path used to +get there. +</para> +<para>You can avoid the ambiguity of Windows paths, and avoid typing +"/cygdrive", by explicitly mounting drives to posix paths. For example: +<screen> + bash$ mkdir /c + bash$ mount c:/ /c + bash$ ls /c +</screen> +Then <literal>/cygdrive/c/Windows</literal> becomes <literal>/c/Windows</literal> which is a +little less typing. +</para> +<para>Note that you only need to mount drives once. The mapping is kept +in the registry so mounts stay valid pretty much indefinitely. +You can only get rid of them with umount, or the registry editor. +</para> +<para>The '-b' option to mount mounts the mountpoint in binary mode +("binmode") where text and binary files are treated equivalently. This +should only be necessary for badly ported Unix programs where binary +flags are missing from open calls. It is also the setting for /, +/usr/bin and /usr/lib in a default Cygwin installation. The default for +new mounts is text mode ("textmode"), which is also the mode for all +"cygdrive" mounts. +</para> +<para>You can change the default <literal>cygdrive</literal> prefix and whether it is +binmode or textmode using the <literal>mount</literal> command. For example, +<screen> + bash$ mount -b --change-cygdrive-prefix cygdrive +</screen> +will change all <literal>/cygdrive/...</literal> mounts to binmode. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.copy-and-paste"> +<question><para>How can I copy and paste into Cygwin console windows?</para></question> +<answer> + +<para>First, consider using rxvt instead of the standard console window. In +rxvt, selecting with the left-mouse also copies, and middle-mouse +pastes. It couldn't be easier! +</para> +<para>Under Windows NT, open the properties dialog of the console window. +The options contain a toggle button, named "Quick edit mode". It must +be ON. Save the properties. +</para> +<para>Under Windows 9x, open the properties dialog of the console window. +Select the Misc tab. Uncheck Fast Pasting. Check QuickEdit. +</para> +<para>You can also bind the insert key to paste from the clipboard by adding +the following line to your .inputrc file: +<screen> + "\e[2~": paste-from-clipboard +</screen> +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.firewall"> +<question><para>What firewall should I use with Cygwin? </para></question> +<answer> + +<para>We have had good reports about Kerio Personal Firewall, ZoneLabs +Integrity Desktop, and the built-in firewall in Windows XP. Other +well-known products including ZoneAlarm and Norton Internet Security have +caused problems for some users but work fine for others. At last report, +Agnitum Outpost did not work with Cygwin. If you are having strange +connection-related problems, disabling the firewall is a good +troubleshooting step (as is closing or disabling all other running +applications, especially resource-intensive processes such as indexed +search). +</para> +<para>On the whole, Cygwin doesn't care which firewall is used. The few rare +exceptions have to do with socket code. +Cygwin uses sockets to implement many of its functions, such as IPC. +Some overzealous firewalls install themselves deeply into the winsock +stack (with the 'layered service provider' API) and install hooks +throughout. Sadly the mailing list archives are littered with examples +of poorly written firewall-type software that causes things to break. +Note that with many of these products, simply disabling the firewall +does not remove these changes; it must be completely uninstalled. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.sharing-files"> +<question><para>How can I share files between Unix and Windows?</para></question> +<answer> + +<para>During development, we have both Linux boxes running Samba and Windows +machines. We often build with cross-compilers under Linux and copy +binaries and source to the Windows system or just toy with them +directly off the Samba-mounted partition. On dual-boot NT/Windows 9x +machines, we usually use the FAT filesystem so we can also access the +files under Windows 9x. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.case-sensitive"> +<question><para>Is Cygwin case-sensitive? What are managed mounts?</para></question> +<answer> + +<para>Several Unix programs expect to be able to use to filenames +spelled the same way, but with different case. A prime example +of this is perl's configuration script, which wants <literal>Makefile</literal> and +<literal>makefile</literal>. WIN32 can't tell the difference between files with +just different case, so the configuration fails. +</para> +<para>To help with this problem, starting in <literal>cygwin-1.5.0</literal> it is +possible to have a case sensitive Cygwin managed mount. This is an +experimental feature and should be used with caution. You should only +use it for directories that are initially unpopulated and are due to +be completely managed by cygwin (hence the name). So, the best use +would be to create an empty directory, mount it, and then add files to +it: +</para> +<screen> +mkdir /managed-dir +mount -o managed c:/cygwin/managed-dir /managed-dir +cd /managed-dir/ +touch makefile +touch Makefile +</screen> + +</answer></qandaentry> + +<qandaentry id="faq.using.dos-filenames"> +<question><para>What about DOS special filenames?</para></question> +<answer> + +<para>Files cannot be named com1, lpt1, or aux (to name a few); either as +the root filename or as the extension part. If you do, you'll have +trouble. Unix programs don't avoid these names which can make things +interesting. E.g., the perl distribution has a file called +<literal>aux.sh</literal>. The perl configuration tries to make sure that +<literal>aux.sh</literal> is there, but an operation on a file with the magic +letters 'aux' in it will hang. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.hangs"> +<question><para>When it hangs, how do I get it back?</para></question> +<answer> + +<para>If something goes wrong and the tools hang on you for some reason (easy +to do if you try and read a file called aux.sh), first try hitting ^C to +return to bash or the cmd prompt. +</para> +<para>If you start up another shell, and applications don't run, it's a good +bet that the hung process is still running somewhere. Use the Task +Manager, pview, or a similar utility to kill the process. +</para> +<para>And, if all else fails, there's always the reset button/power switch. +This should never be necessary under Windows NT. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.directory-structure"> +<question><para>Why the weird directory structure?</para></question> +<answer> + +<para>Why do /lib and /usr/lib (and /bin, /usr/bin) point to the same thing? +</para> +<para>Why use mounts instead of symbolic links? +</para> +<para>Can I use a disk root (e.g., C:\) as Cygwin root? Why is this discouraged? +</para> +<para>After a new installation in the default location, your mount points will +look something like this: +</para> +<screen> + bash$ mount + C:\cygwin\bin on /usr/bin type system (binmode) + C:\cygwin\lib on /usr/lib type system (binmode) + C:\cygwin on / type system (binmode) +</screen> + +<para>(Exactly what you see depends on what options you gave to <literal>setup.exe</literal>.) +</para> +<para>Note that /bin and /usr/bin point to the same location, as do /lib and +/usr/lib. This is intentional, and you should not undo these mounts +unless you <emphasis>really</emphasis> know what you are doing. +</para> +<para>Various applications and packages may expect to be installed in /lib or +/usr/lib (similarly /bin or /usr/bin). Rather than distinguish between +them and try to keep track of them (possibly requiring the occasional +duplication or symbolic link), it was decided to maintain only one +actual directory, with equivalent ways to access it. +</para> +<para>Symbolic links had been considered for this purpose, but were dismissed +because they do not always work on Samba drives. Also, mounts are +faster to process because no disk access is required to resolve them. +</para> +<para>Note that non-cygwin applications will not observe Cygwin mounts (or +symlinks for that matter). For example, if you use WinZip to unpack the +tar distribution of a Cygwin package, it may not get installed to the +correct Cygwin path. <emphasis>So don't do this!</emphasis> +</para> +<para>It is strongly recommended not to make the Cygwin root directory the +same as your drive's root directory, unless you know what you are doing +and are prepared to deal with the consequences. It is generally easier +to maintain the Cygwin hierarchy if it is isolated from, say, C:\. For +one thing, you avoid possible collisions with other (non-cygwin) +applications that may create (for example) \bin and \lib directories. +(Maybe you have nothing like that installed now, but who knows about +things you might add in the future?) +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.anti-virus"> +<question><para>How do anti-virus programs like Cygwin?</para></question> +<answer> + +<para>Users have reported that NAI (formerly McAfee) VirusScan for NT (and +others?) is incompatible with Cygwin. This is because it tries to scan +the newly loaded shared memory in cygwin1.dll, which can cause fork() to +fail, wreaking havoc on many of the tools. (It is not confirmed that +this is still a problem, however.) +</para> +<para>There have been several reports of NAI VirusScan causing the system to +hang when unpacking tar.gz archives. This is surely a bug in VirusScan, +and should be reported to NAI. The only workaround is to disable +VirusScan when accessing these files. This can be an issue during +setup, and is discussed in that FAQ entry. +</para> +<para>Some users report a significant performance hit using Cygwin when their +anti-virus software is enabled. Rather than disable the anti-virus +software completely, it may be possible to specify directories whose +contents are exempt from scanning. In a default installation, this +would be <literal>C:\cygwin\bin</literal>. Obviously, this could be +exploited by a hostile non-Cygwin program, so do this at your own risk. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.emacs"> +<question><para>Is there a Cygwin port of GNU Emacs?</para></question> +<answer> + +<para>Yes! It uses the X11 (<ulink url="http://cygwin.com/xfree/">http://cygwin.com/xfree/</ulink>) Windows +interface. From a remote login shell, this ``emacs -nw'' works fine. +There is also a non-X11 version which just provides the text-only +terminal interface. Use Cygwin Setup to install either one (or both). +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.ntemacs"> +<question><para>What about NT Emacs?</para></question> +<answer> + +<para>If you want GNU Emacs with a native Microsoft Windows interface, but +without X, then you must use the native Windows port, commonly known +as ``NT Emacs''. You get NT Emacs from any GNU mirror. It is not +available from Cygwin Setup. +</para> +<para>NT Emacs uses the Windows command shell by default. Since it is not a +Cygwin application, it has no knowledge of Cygwin mounts. With those +points in mind, you need to add the following code to your ~/.emacs +(or ~/_emacs) file in order to use Cygwin bash. This is particularly useful +for the JDEE package (<ulink url="http://jdee.sunsite.dk/">http://jdee.sunsite.dk/</ulink>). The following +settings are for Emacs 21.1: +</para> +<screen> + ;; This assumes that Cygwin is installed in C:\cygwin (the + ;; default) and that C:\cygwin\bin is not already in your + ;; Windows Path (it generally should not be). + ;; + (setq exec-path (cons "C:/cygwin/bin" exec-path)) + (setenv "PATH" (concat "C:\\cygwin\\bin;" (getenv "PATH"))) + ;; + ;; NT-emacs assumes a Windows command shell, which you change + ;; here. + ;; + (setq process-coding-system-alist '(("bash" . undecided-unix))) + (setq shell-file-name "bash") + (setenv "SHELL" shell-file-name) + (setq explicit-shell-file-name shell-file-name) + ;; + ;; This removes unsightly ^M characters that would otherwise + ;; appear in the output of java applications. + ;; + (add-hook 'comint-output-filter-functions + 'comint-strip-ctrl-m) +</screen> + +<para>If you want NT Emacs to understand Cygwin paths, get +cygwin-mount.el from <ulink url="http://www.emacswiki.org/elisp/index.html">http://www.emacswiki.org/elisp/index.html</ulink>. +</para> +<para>Note that all of this ``just works'' if you use the Cygwin port of +Emacs from Cygwin Setup. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.xemacs"> +<question><para>What about XEmacs?</para></question> +<answer> + +<para>For a concise description of the current situation with XEmacs, see +this message from the Cygwin mailing list: +<ulink url="http://cygwin.com/ml/cygwin/2002-11/msg00609.html">http://cygwin.com/ml/cygwin/2002-11/msg00609.html</ulink>. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.console-window"> +<question><para>Is there a better alternative to the standard console window?</para></question> +<answer> + +<para>Yes! Use rxvt instead. It's an optional package in Cygwin Setup. +You can use it with or without X11. You can resize it easily by +dragging an edge or corner. Copy and paste is easy with the left and +middle mouse buttons, respectively. It will honor settings in your +~/.Xdefaults file, even without X. +</para> +<para>Don't invoke as simply ``rxvt'' because that will run /bin/sh (really +ash) which is not a good interactive shell. For details see +<literal>/usr/doc/Cygwin/rxvt-<ver>.README</literal>. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.info-error"> +<question><para>info error "dir: No such file or directory"</para></question> +<answer> + +<para>Cygwin packages install their info documentation in the +<literal>/usr/share/info</literal> directory. But you need to create a <literal>dir</literal> +file there before the standalone info program (probably +<literal>/usr/bin/info</literal>) can be used to read those info files. This is how +you do it: +<screen> + bash$ cd /usr/share/info + bash$ for f in *.info ; do install-info $f dir ; done +</screen> +This may generate warnings: +<screen> + install-info: warning: no info dir entry in `gzip.info' + install-info: warning: no info dir entry in `time.info' +</screen> +The <literal>install-info</literal> command cannot parse these files, so you will +have to add their entries to <literal>/usr/share/info/dir</literal> by hand. +</para> +<para>Even if the dir file already exists, you may have to update it when +you install new Cygwin packages. Some packages update the dir file +for you, but many don't. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.out-of-queue"> +<question><para>Why do I get a message saying Out of Queue slots?</para></question> +<answer> + +<para>"Out of queue slots!" generally occurs when you're trying to remove +many files that you do not have permission to remove (either because +you don't have permission, they are opened exclusively, etc). What +happens is Cygwin queues up these files with the supposition that it +will be possible to delete these files in the future. Assuming that +the permission of an affected file does change later on, the file will +be deleted as requested. However, if too many requests come in to +delete inaccessible files, the queue overflows and you get the message +you're asking about. Usually you can remedy this with a quick chmod, +close of a file, or other such thing. (Thanks to Larry Hall for +this explanation). +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.symlinks-samba"> +<question><para>Why don't symlinks work on samba-mounted filesystems?</para></question> +<answer> + +<para>Symlinks are marked with "system" file attribute. Samba does not +enable this attribute by default. To enable it, consult your Samba +documentation and then add these lines to your samba configuration +file: +</para> +<screen> + map system = yes + create mask = 0775 +</screen> + +<para>Note that the 0775 can be anything as long as the 0010 bit is set. +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.df-incorrect"> +<question><para>Why does df report sizes incorrectly.</para></question> +<answer> + +<para>There is a bug in the Win32 API function GetFreeDiskSpace that +makes it return incorrect values for disks larger than 2 GB in size. +Perhaps that may be your problem? +</para> +</answer></qandaentry> + +<qandaentry id="faq.using.tcl-tk"> +<question><para>Why doesn't Cygwin tcl/tk understand Cygwin paths?</para></question> +<answer> + +<para>The versions of Tcl/Tk distributed with Cygwin (e.g. cygtclsh80.exe, +cygwish80.exe) are not actually "Cygwin versions" of those tools. +They are built with the <literal>-mno-cygwin</literal> option to <literal>gcc</literal>, which +means they do not understand Cygwin mounts or symbolic links. +</para> +<para>See the entry "How do I convert between Windows and UNIX paths?" +elsewhere in this FAQ. +</para></answer></qandaentry> + |