08-17-2009
forward/backward capable prompt
Hi,
I would like to construct an interactive prompt for a series of bash shell scripts. This prompt will ask the user a series of questions, and the answers will determine which scripts are run, and in which order.
I am familiar with the "read" command, and have successfully constructed a simple prompt. However, due to the inherent nature of shell scripts, the prompt is only capable of going forward; ie question #1 is asked, and once an answer is entered, question #2 is asked. The user is not able to then go back to question #1, unless he/she quits and starts over.
Does anyone have any ideas on how to do this? Is there a command that orders the shell to jump backward/forward to a specific line number of the script? My thought is that if the user enters for example "b" (for back), the shell would then skip so many line #'s back in the script to where the previous question was asked. Any other ideas?
Thanks for any help,
Mike
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LEARN ABOUT LINUX
git-shell
GIT-SHELL(1) Git Manual GIT-SHELL(1)
NAME
git-shell - Restricted login shell for Git-only SSH access
SYNOPSIS
chsh -s $(command -v git-shell) <user>
git clone <user>@localhost:/path/to/repo.git
ssh <user>@localhost
DESCRIPTION
This is a login shell for SSH accounts to provide restricted Git access. It permits execution only of server-side Git commands implementing
the pull/push functionality, plus custom commands present in a subdirectory named git-shell-commands in the user's home directory.
COMMANDS
git shell accepts the following commands after the -c option:
git receive-pack <argument>, git upload-pack <argument>, git upload-archive <argument>
Call the corresponding server-side command to support the client's git push, git fetch, or git archive --remote request.
cvs server
Imitate a CVS server. See git-cvsserver(1).
If a ~/git-shell-commands directory is present, git shell will also handle other, custom commands by running "git-shell-commands/<command>
<arguments>" from the user's home directory.
INTERACTIVE USE
By default, the commands above can be executed only with the -c option; the shell is not interactive.
If a ~/git-shell-commands directory is present, git shell can also be run interactively (with no arguments). If a help command is present
in the git-shell-commands directory, it is run to provide the user with an overview of allowed actions. Then a "git> " prompt is presented
at which one can enter any of the commands from the git-shell-commands directory, or exit to close the connection.
Generally this mode is used as an administrative interface to allow users to list repositories they have access to, create, delete, or
rename repositories, or change repository descriptions and permissions.
If a no-interactive-login command exists, then it is run and the interactive shell is aborted.
EXAMPLE
To disable interactive logins, displaying a greeting instead:
+
$ chsh -s /usr/bin/git-shell
$ mkdir $HOME/git-shell-commands
$ cat >$HOME/git-shell-commands/no-interactive-login <<EOF
#!/bin/sh
printf '%s
' "Hi $USER! You've successfully authenticated, but I do not"
printf '%s
' "provide interactive shell access."
exit 128
EOF
$ chmod +x $HOME/git-shell-commands/no-interactive-login
SEE ALSO
ssh(1), git-daemon(1), contrib/git-shell-commands/README
GIT
Part of the git(1) suite
Git 1.8.5.3 01/14/2014 GIT-SHELL(1)