busybox-w32/include/mingw.h, branch cron_changesA mirror of https://github.com/rmyorston/busybox-w32.git
https://git.lua4.win/busybox-w32/atom?h=cron_changes2026-05-04T10:51:00+00:00win32: add FAST_FUNC annotations2026-05-04T10:51:00+00:00Ron Yorstonrmy@pobox.com2026-05-04T10:51:00+00:00urn:sha1:f26b970e4d22e1b2e3ca6209c3412fa0f683d953
I've been far too lax in applying FAST_FUNC annotations. These
can make function calls smaller and faster, but only on 32-bit
systems and for non-static, non-variadic functions with non-void
arguments.
Saves 4680 bytes in the 32-bit build; 64-bit builds are unaffected.
win32: improve urandom/zero device handling2026-04-26T19:49:26+00:00Ron Yorstonrmy@pobox.com2026-04-26T19:49:26+00:00urn:sha1:164015bc98835934ed6437107d874e6987ad9418
Rearrange the code to avoid a superfluous process creation.
Saves 16 bytes in the 64-bit build, adds 24 in the 32-bit.
ash: allow 'times' built-in to report process timing2026-04-12T10:49:29+00:00Ron Yorstonrmy@pobox.com2026-04-12T10:49:29+00:00urn:sha1:333c65ca71f1acb2cc6cd3920a346bb8ddf82dec
Move existing code which obtains process execution times into a
separate function. Use it to allow times(2) to report execution
times for the current process, though not child execution times.
Change TICKS_PER_SECOND from 100 to 1000 to increase the displayed
resolution of process times (though the measured resolution may
well be less than this).
Adds 48-80 bytes.
(GitHub issue #574)
ash: 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)