busybox-w32/include/mingw.h, branch long_pathsA mirror of https://github.com/rmyorston/busybox-w32.git
https://git.lua4.win/busybox-w32/atom?h=long_paths2026-02-25T09:33:36+00:00ash: allow execution of busybox-w32 binary without extension2026-02-25T09:33:36+00:00Ron Yorstonrmy@pobox.com2026-02-25T09:33:36+00:00urn:sha1:35e590816a844e3ccc707c841b756e83987d09eb
If the busybox-w32 binary didn't have an extension the shell was
unable to spawn itself:
$ ls -l busybox
-rwxrwxr-x 1 rmy rmy 661006 Feb 25 09:37 busybox
$ ./busybox sh
$ ls
sh: unable to spawn shell
This happened because the shell used spawnve() from the C runtime
to execute itself. Microsoft insists on trying to add an extension
to the name of the binary unless it has an explicit '.' as its
last character.
Use the internal spawnveq() instead, as it handles various quirks
like the above.
Adds 16-32 bytes.
(GitHub issue #566)
win32: add support for /dev/std{in,out,err}2026-02-02T15:53:01+00:00Ron Yorstonrmy@pobox.com2026-02-02T15:53:01+00:00urn:sha1:8e6a6312552343aec7f5cde795ef0a11ef83b8ff
Allow applets to open the "files" /dev/stdin, /dev/stdout and
/dev/stderr. The 'stat' and 'ls' applets pretend they exist.
Adds 48-56 bytes.
win32: avoid failure when localtime() argument is out of range2025-11-26T12:56:11+00:00Ron Yorstonrmy@pobox.com2025-11-26T12:56:11+00:00urn:sha1:3b2f7ff1e0733c8224d0c6a0632abbbb87e8db91
The implementation of localtime(3) in the Microsoft Windows
runtime only accepts arguments between the Unix epoch (1970)
and either 2038 or 3000 for 32-bit or 64-bit systems respectively.
For values outside those limits it returns a NULL pointer.
Unfortunately, upstream BusyBox hardly ever bothers to check the
return value. Thus, when a call to stat(2) returned an all-zero
FILETIME for a file, the 'stat' applet failed. An all-zero FILETIME
represents a date in 1600, which is clearly before the Unix epoch.
Add a wrapper to localtime(3) which detects an out-of-range value
and returns a valid 'struct tm' for the Unix epoch. This is easier
than adding checks on the return value of every call to localtime(3).
Adds 32-48 bytes.
(GitHub issue #548)
win32: allow use of /dev/tty2025-11-10T11:33:33+00:00Ron Yorstonrmy@pobox.com2025-11-10T11:33:33+00:00urn:sha1:f53dbcb8edbcfdad1721d0f5c9e8a16d54e983dc
Treat /dev/tty as an alias for Windows' 'con' device. The code
is similar to that used for /dev/null.
Adds 24-48 bytes.
(GitHub issue #538)
flock: enable by default2025-10-09T10:10:40+00:00Ron Yorstonrmy@pobox.com2025-10-09T10:10:40+00:00urn:sha1:41bab273afa7cc9f773666622eb888aee8a340ac
Use the Gnulib implementation of flock(2) to allow the flock
applet to be enabled.
Costs 900-984 bytes.
(GitHub issue #528)
win32: use RtlGenRandom for /dev/urandom2025-10-09T06:49:58+00:00Ron Yorstonrmy@pobox.com2025-10-09T06:49:58+00:00urn:sha1:255e7ea4e2a0e3d28c0abf2750f42713eff711d7
Use the (somewhat ancient) Microsoft RtlGenRandom() function to
provide random data for /dev/urandom.
Saves 176-240 bytes.
(GitHub issue #519)
Further mingw-w64/gcc build tweaks2025-10-02T11:29:36+00:00Ron Yorstonrmy@pobox.com2025-10-02T06:53:27+00:00urn:sha1:0496280c4589bf33192ab01ce052d66179e0ade3
Commit 6481bb22b (win32: use 64-bit time on 32-bit platforms) fails
to build with mingw32-gcc prior to mingw-w64 10.0.0.
Don't used 64-bit time for such builds.
mingw-w64 7.0.0 and below don't have some definitions required for
native TLS support. This is enabled by default in the 64-bit
Unicode build.
Add the definitions required for the default build. TLS 1.3
support needs more but isn't enabled by default.
(GitHub issue #527)
stty: enable a minimal Windows implementation2025-07-25T07:55:06+00:00Ron Yorstonrmy@pobox.com2025-07-25T07:55:06+00:00urn:sha1:1354c47894a71699ec1fd0086644627a621250ce
Implement a minimal stty applet for Windows.
- Display and set terminal rows and columns
- Enable/disable raw/cooked mode
- Enable/disable echo mode
- Implement 'stty sane' to reset raw/cooked/echo
Adds 2120-2304 bytes.
(GitHub issue #58)
win32: deduplicate die_if_error()2025-07-11T10:47:56+00:00Ron Yorstonrmy@pobox.com2025-07-11T10:47:56+00:00urn:sha1:b3ad13290344c2f40dc5bdc6053cc3cc73acfd9c
There were two copies of the static function die_if_error().
Replace these with a single external function.
Saves 16 bytes.
win32: retry when command needs elevated privileges2025-02-03T11:55:28+00:00Ron Yorstonrmy@pobox.com2025-02-03T11:55:28+00:00urn:sha1:14ccc45d548c9dfa73594f155e920c83e2882081
Some installer programs have an entry in their manifest to indicate
that they need elevated privileges. The shell in busybox-w32 was
unable to run such programs.
When a program fails to run with ERROR_ELEVATION_REQUIRED, try
again using ShellExecuteEx() with the 'runas' verb to give it
elevated privileges.
Adds 272-288 bytes.
(GitHub issue #481)