X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=guestfish.pod;h=4341e2aea4a89047361fc341c32eb1db0c6caa21;hp=56d941f822e310ce880a6c8847212b5dd468ff52;hb=9a3c4a62398d9f0c553ac2b5f43a3eefafd7bac5;hpb=e1c62f6332ae07cb6f95130dcc9852701d085e2b diff --git a/guestfish.pod b/guestfish.pod index 56d941f..4341e2a 100644 --- a/guestfish.pod +++ b/guestfish.pod @@ -49,13 +49,13 @@ Remove C (in reality not such a great idea): =head2 As an interactive shell $ guestfish - + Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. - + Type: 'help' for help with commands 'quit' to quit the shell - + > help =head2 As a script interpreter @@ -156,6 +156,10 @@ able to hit the tab key to complete paths on the guest filesystem, but this causes extra "hidden" guestfs calls to be made, so this option is here to allow this feature to be disabled. +=item B<-V> | B<--version> + +Display the guestfish / libguestfs version number and exit. + =back =head1 COMMANDS ON COMMAND LINE @@ -278,6 +282,32 @@ will create a directory C on the host, and then export the contents of C on the mounted filesystem to C. (See C). +=head1 PIPES + +Use CspaceE | command> to pipe the output of the +first command (a guestfish command) to the second command (any host +command). For example: + + cat /etc/passwd | awk -F: '$3 == 0 { print }' + +(where C is the guestfish cat command, but C is the host awk +program). The above command would list all accounts in the guest +filesystem which have UID 0, ie. root accounts including backdoors. +Other examples: + + hexdump /bin/ls | head + list-devices | tail -1 + +The space before the pipe symbol is required, any space after the pipe +symbol is optional. Everything after the pipe symbol is just passed +straight to the host shell, so it can contain redirections, globs and +anything else that makes sense on the host side. + +To use a literal argument which begins with a pipe symbol, you have +to quote it, eg: + + echo "|" + =head1 EXIT ON ERROR BEHAVIOUR By default, guestfish will ignore any errors when in interactive mode @@ -289,19 +319,10 @@ If you prefix a command with a I<-> character, then that command will not cause guestfish to exit, even if that (one) command returns an error. -=head1 COMMANDS - -=head2 help +=head1 GUESTFISH COMMANDS - help - help cmd - -Without any parameter, this lists all commands. With a C -parameter, this displays detailed help for a command. - -=head2 quit | exit - -This exits guestfish. You can also use C<^D> key. +The commands in this section are guestfish convenience commands, in +other words, they are not part of the L API. =head2 alloc | allocate @@ -354,6 +375,23 @@ editors. NOTE: This will not work reliably for large files (> 2 MB) or binary files containing \0 bytes. +=head2 glob + + glob command args... + +Expand wildcards in any paths in the args list, and run C +repeatedly on each matching path. + +See section WILDCARDS AND GLOBBING. + +=head2 help + + help + help cmd + +Without any parameter, this lists all commands. With a C +parameter, this displays detailed help for a command. + =head2 lcd lcd directory @@ -363,14 +401,32 @@ itself. Note that C won't do what you might expect. -=head2 glob +=head2 more | less - glob command args... + more filename -Expand wildcards in any paths in the args list, and run C -repeatedly on each matching path. + less filename -See section WILDCARDS AND GLOBBING. +This is used to view a file. + +The default viewer is C<$PAGER>. However if you use the alternate +command C you will get the C command specifically. + +NOTE: This will not work reliably for large files +(> 2 MB) or binary files containing \0 bytes. + +=head2 quit | exit + +This exits guestfish. You can also use C<^D> key. + +=head2 time + + time command args... + +Run the command as usual, but print the elapsed time afterwards. This +can be useful for benchmarking operations. + +=head1 COMMANDS @ACTIONS@ @@ -378,11 +434,32 @@ See section WILDCARDS AND GLOBBING. =over 4 +=item EDITOR + +The C command uses C<$EDITOR> as the editor. If not +set, it uses C. + +=item HOME + +If compiled with GNU readline support, then the command history +is saved in C<$HOME/.guestfish> + +=item LIBGUESTFS_APPEND + +Pass additional options to the guest kernel. + =item LIBGUESTFS_DEBUG Set C to enable verbose messages. This has the same effect as using the B<-v> option. +=item LIBGUESTFS_MEMSIZE + +Set the memory allocated to the qemu process, in megabytes. For +example: + + LIBGUESTFS_MEMSIZE=700 + =item LIBGUESTFS_PATH Set the path that guestfish uses to search for kernel and initrd.img. @@ -394,19 +471,10 @@ Set the default qemu binary that libguestfs uses. If not set, then the qemu which was found at compile time by the configure script is used. -=item LIBGUESTFS_APPEND - -Pass additional options to the guest kernel. - -=item HOME +=item PAGER -If compiled with GNU readline support, then the command history -is saved in C<$HOME/.guestfish> - -=item EDITOR - -The C command uses C<$EDITOR> as the editor. If not -set, it uses C. +The C command uses C<$PAGER> as the pager. If not +set, it uses C. =back