busybox-w32/miscutils/crond.c, branch cron_changes

crond: fix reboot special time

2026-05-15T06:52:14+00:00

The 'reboot' special time didn't work because the file to check for a reboot couldn't be created. And in any case, the mechanism used on Linux wouldn't work: Windows has no /var/run directory which is cleared on reboot. The crond.reboot file is now placed in the cron directory. If it doesn't exist when crond starts, it's created but the reboot job (if any) isn't run. If the file exists its modification time is compared with the time of the current boot. If it's older update its time and run the reboot job. Adds 144-224 bytes.

crond: drop '-S' option

2026-05-15T06:52:14+00:00

Since we don't use syslog on Windows there's no point in having an option to set it. Log to stderr by default instead. Saves 88-96 bytes.

crond,crontab: executable-relative cron directories

2026-05-15T06:52:14+00:00

Some users want a 'portable' busybox-w32 installation on removable media. To help with this, certain files can be positioned relative to the location of the executable. crond and crontab now look for var/spool/cron/crontabs relative to the binary, and use that as their working directory if it exists. If it doesn't, fall back to the hardcoded absolute path. The '-c' command line option can still be used to override the automatic choice. The '-c' option in crond now updates the cron directory variable as well as that for crontabs. Adds 128-144 bytes.

crond: build tweaks

2026-05-03T09:52:29+00:00

Using 'depends on FEATURE_SYSLOG' is unreliable because FEATURE_SYSLOG can't be set directly. A POSIX build with all applets that need syslog disabled *except* crond may fail. Revert to using 'select FEATURE_SYSLOG' in crond and exclude the unused syslog code on Windows. If crond is unable to run sendmail report this in the error message. Update all default Windows configurations. (GitHub PR #561)

Add crond and crontab (#561)

2026-05-03T08:53:07+00:00

* Enable crontab * Enable crond * Allow sendmail to be used in crond This also adds another option to the mingw_popen_fd function to capture stderr as well. And also added the options to support WNOHANG as well as an unused status in mingw_wait3 * Check current uid when running crond * Only show tail for mailto jobs * Use system drive for cron * crond: add missing feature check * crond: use spawn_detach for background operation

*: use safe_waitpid() or wait_any_nohang() where approppriate

2025-07-30T18:02:23+00:00

function old new delta crond_main 1227 1237 +10 init_main 804 794 -10 wait_one 263 252 -11 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/2 up/down: 10/-21) Total: -11 bytes Signed-off-by: Denys Vlasenko

crond: reap orphaned grandchildren to prevent zombie buildup

2025-07-30T17:49:23+00:00

If a cron job launches a background task, e.g. `sh -c "sleep 5 &"`, the shell exits immediately and the `sleep` process is re-parented to PID 1. When BusyBox `crond` itself happens to be PID 1 (common in a minimal container), those orphans become direct children of `crond`. Because `crond` only calls waitpid() for the PIDs it explicitly tracks, these processes remain forever in Z state and the container slowly fills with zombies. Add a small `while (waitpid(-1, NULL, WNOHANG) > 0)` sweep at the end of check_completions() so any stray children are reaped. When `crond` is not PID 1 the loop returns -ECHILD immediately, so behaviour and overhead on a normal system are unchanged. Size impact: +12 bytes on x86-64 (gcc 13.3.0 -Os, static) Signed-off-by: Valentin Lab Signed-off-by: Denys Vlasenko

libbb: crypt_make_pw_salt(): fix yescrypt's random salt last char

2025-07-19T16:42:32+00:00

function old new delta crypt_make_pw_salt 128 146 +18 Signed-off-by: Denys Vlasenko

crond: log5 fix typo, replace log level '4' with '5'

2024-03-02T16:03:37+00:00

log5() with crondlog(5, msg, va) seems making logging more consistent. function old new delta ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/0 up/down: 0/0) Total: 0 bytes Signed-off-by: Jones Syue Signed-off-by: Bernhard Reutner-Fischer

Update applet size estimates

2023-07-10T15:25:21+00:00

Signed-off-by: Denys Vlasenko