busybox-w32/util-linux, branch su_cmd

Merge branch 'busybox' into merge

2023-04-17T06:32:52+00:00

mkfs_vfat: do not generate same volume_id when run in rapid succession

2023-04-10T12:47:38+00:00

function old new delta mkfs_vfat_main 1502 1523 +21 Signed-off-by: Denys Vlasenko

runuser,drop: drop runuser, tweak drop

2023-03-19T10:25:23+00:00

Remove the runuser applet, leaving only drop. Move drop from util-linux to miscutils. A command of the form 'drop -c command' causes the BusyBox shell to be used, just like 'drop' without any arguments. A simple OpenSSH configuration with 'drop.exe' as DefaultShell and no DefaultShellArguments now works both for interactive login and to run a command. This is useful for older versions of OpenSSH which don't support DefaultShellArguments. Saves 208-232 bytes.

runuser,drop: code shrink

2023-03-19T10:24:43+00:00

Make quote_arg() always return an allocated string so we can free it unconditionally. Always use argv[1] as the first part of the command string. Saves 48 bytes.

runuser: add 'drop' as an alias for runuser

2023-03-16T15:37:15+00:00

The 'drop' alias for 'runuser' relaxes a number of constraints that were introduced for compatibility: - It works even if the current process doesn't have elevated privileges. - It isn't necessary to specify the name of the user. - Any command can be invoked, not just the BusyBox shell. - If the command doesn't specify a path 'drop' will first look for a BusyBox applet then search PATH. Adds 320-336 when built along with runuser. (GitHub issue #240)

runuser: new applet

2023-03-13T10:25:56+00:00

Add a cut down, Windows-specific implementation of `runuser` from util-linux. This allows elevated privileges to be dropped when running in an SSH session. It also works when using `su` or starting busybox-w32 'as administrator'. There are complications: - The method used to drop privileges leaves the access token in the TokenIsElevated state. Detecting this is likely to be fragile. - The unprivileged shell is started by CreateProcessAsUserA(). In older versions of Windows this has to be loaded dynamically. Adds about 900 bytes. (GitHub issue #240)

win32: add support for virtual terminal input

2023-03-05T12:43:46+00:00

Alter certain applets to support virtual terminal input, if enabled. In many places this is achieved by building previously excluded upstream terminal-handling code. The busybox-w32 implementation of termios(3) functions does nothing if virtual terminal input is disabled, so it can be invoked regardless. Some applet-specific terminal-handling code is also required. This affects less, more, vi and command line editing in the shell. (The `more` applet isn't enabled in the default configuration.) This series of patches adds about 1.7KB to the binaries.

Merge branch 'busybox' into merge

2023-01-05T08:56:27+00:00

xxd: use bb_simple_perror_msg... where appropriate

2023-01-03T07:30:12+00:00

Signed-off-by: Denys Vlasenko

xxd: fix use of non-initialized data

2023-01-02T15:59:40+00:00

Signed-off-by: Denys Vlasenko