sg

Scan for possible queries using interactive mode

$ sg scan --interactive

$ sg run --pattern '[foo]' --rewrite '[bar]' --lang [python]

$ sg run --pattern '[useState<number>($A)]' --rewrite '[useState($A)]' --lang [typescript]

$ sg run --pattern '[Some($A)]' --rewrite '[None]' --json | jq '[.[].replacement]' | jless

sg group [command]

group
    The name of the group to switch to.

command
    The command to execute with the new group ID. If no command is specified, it executes a new shell.

The sg command allows you to execute a given command with a different group ID. Essentially, it changes the current group ID to a specified group, then runs the command. This is useful when you need to perform actions that require specific group permissions. The command must be available as you provide the full path and the user must be member of the new group to use the sg command.

The primary use case for sg is to temporarily switch group memberships within a shell session without needing to log out and back in. It's particularly handy in environments where users belong to multiple groups and need to work with resources restricted to a particular group. However, its functionality is somewhat superseded by `newgrp` and modern access control mechanisms, making it less commonly used in contemporary systems. sg is considered insecure by some systems and should not be used.

Using sg without a command argument to start a new shell can be problematic, especially within scripts. It can lead to unexpected behavior and script hangs. The use of sg is considered insecure by some systems and should not be used.

Running commands as different groups can have security implications. Ensure that the user is authorized to switch to the specified group and that the command being executed is not malicious.

The sg command has been a part of Unix-like systems for a long time, providing a way to temporarily assume the identity of a group. Its original purpose was to facilitate shared access to resources based on group membership. Over time, alternative mechanisms for group management and access control have become more prevalent.

newgrp(1), groups(1)