busybox-w32/shell, branch master

ash: only report background jobs in root shell

2026-06-30T16:50:30+00:00

Background jobs were being reported in shells other than an interactive, top-level shell. Suppress this unnecessary report. Adds 16 bytes. Signed-off-by: Ron Yorston

ash: only copy jobtab if needed for job hack

2026-06-30T16:31:20+00:00

This script: #!/bin/bash ( ( true ) & ( true ) & ( true ) & ( true ) & ( true ) & ) resulted in a crash. The problem was introduced by commit 7b692ddf0c (ash: improved support for jobs built-in). This commit copies the job table into child shells for use by the 'jobs' built-in. The crash happens because when the job table is cleared in the child it becomes available for reuse. If only four jobs are required this is OK but going over four causes the table to be reallocated. This doesn't work because in the child it's in shared memory. The fix is not to pass the job table to the child unless it's required by the 'jobs' built-in. This is also more efficient. Adds 0-16 bytes. (GitHub issue #604) Signed-off-by: Ron Yorston

ash: scan drives directly for 'pwd -a'

2026-06-15T11:42:36+00:00

The shell builtin 'pwd' takes a Windows-specific '-a' option to display the current directory on each drive. Use Windows APIs directly to scan for valid drives instead of 'getmntent()'. Future changes will result in 'getmntent()' returning mounted volumes as well as drives. Signed-off-by: Ron Yorston

ash: don't treat process substitutions as background jobs

2026-05-31T14:10:05+00:00

Commit bda604a70 (ash: prevent leakage of process handles) added job tracking for process substitutions. This had the unwanted side-effect that if the user tried to exit from the shell after a command involving process substitution the shell reported that background jobs were present and refused to exit. Use the flag introduced in commit e6c716317 (ash: don't report completion of process substitution) to avoid this. Adds 16 bytes. (GitHub issue #587) Signed-off-by: Ron Yorston

ash: read built-in should respect stty -echo

2026-05-24T18:06:25+00:00

If echo has been disabled by the command 'stty -echo' the shell 'read' built-in should match its behaviour on Linux and not echo keyboard input. Adds 32-48 bytes. (GitHub issue #594) Signed-off-by: Ron Yorston

ash: don't report completion of process substitution

2026-05-17T10:18:32+00:00

Commit bda604a70 (ash: prevent leakage of process handles) added job tracking for process substitutions. This had the unwanted side-effect that the completion of such processes was then reported in interactive shells. Set a flag in such jobs so their completion isn't reported. Adds 32 bytes. (GitHub issue #587)

ash: prevent leakage of process handles

2026-05-13T11:32:26+00:00

When the shell invoked process substitution it retained a process handle to the child. These handles could accumulate without limit. The shell in upstream BusyBox doesn't bother to create a job structure for process substitutions or here documents. This isn't appropriate on Windows, where we need to track the child process handles. Create job structures as required. Saves 32-48 bytes. (GitHub issue #587)

ash: further fixes to merge of upstream changes

2026-05-06T12:57:04+00:00

Commits e23652908 and 686a0803f (ash: fix execution of applets via Unix-style path) were necessary following a major revision of the shell upstream. Another problem was found: $ sh $ PATH="/usr/bin;$PATH" exec non-existent resulted in a segfault. This happened because during a PATH search tryexec() modified argv[0] when it detected a Unix-style path (in this case '/usr/bin/non-existent') but failed to restore it if the execution failed. There were other issues: - The logic of the new code failed to match the original: the test for a Unix-style path should only have happened if an attempt to execute the full path had already failed. - The test for a script running an interpreter which is an applet also modified argv. If the execution failed argv should have been restored to its original state. - During a PATH search the 'path' pointer walked through the elements of the path. This pointer was also used to determine if an applet was overridden by an executable. This is wrong: the full PATH variable should have been used. The code around tryexec()/shellexec() has been rewritten to take these issues into account. Adds 32-48 bytes. (GitHub issue #584)

ash: fix build failure if SH_STANDALONE is disabled

2026-05-05T07:14:22+00:00

It wasn't possible to build ash if FEATURE_SH_STANDALONE was disabled. This issue was introduced during the large merge of upstream changes to ash in commit e23652908.

Merge branch 'busybox' into merge

2026-03-11T10:14:49+00:00