Speculative Shell Feature Brainstorming Post: 302509272

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The Lounge What is on Your Mind? Speculative Shell Feature Brainstorming Post 302509272 by tetsujin on Wednesday 30th of March 2011 11:46:43 AM

03-30-2011

Registered User

Quote:

Originally Posted by fpmurphy

As regards JavaScript shells, a simple Google search will educate you on the numerous variety of such shells out there.

Yeah, I try web searching for "Javascript shell" and I get a bunch of in-browser debugging tools.

Quote:

Objects do not need explicit destructors as in C++. This can be handled automatically by a shell - reference count goes to zero, goes out of scope, or many other ways.

The relevant point of a destructor is that when one of those things happens - reference count goes to zero, variable goes out of scope, whatever - the destructor is run and something happens. That allows you to use object lifetime to control resource allocation - including allocation of resources the shell may not have been explicitly designed to manage.

Last edited by tetsujin; 03-30-2011 at 12:54 PM..

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LEARN ABOUT OPENDARWIN

chsh

CHSH(1)                                                            User Commands                                                           CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
           Display help message and exit.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
           The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
           User account information.

       /etc/shells
           List of valid login shells.

       /etc/login.defs
           Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.5                                                    01/25/2018                                                             CHSH(1)