procd/plug, branch master

coldplug: fix missing header include

2026-02-09T11:31:44Z

makedev() is defined in header sys/sysmacros.h which needs to be included to not break the build. Fixes: 58d7aaa ("initd/coldplug: create /dev/null before running udevtrigger") Signed-off-by: Daniel Golle

initd/coldplug: create /dev/null before running udevtrigger

2026-02-09T11:09:58Z

When procd_coldplug() runs, it unmounts /dev and mounts a fresh empty tmpfs before forking udevtrigger to populate device nodes via hotplug events. Since udevtrigger runs asynchronously, there is a race window between the fresh mount and when the "null" device uevent is processed. If any code executes a shell redirect to /dev/null during this window (e.g., from hotplug handlers or other event processing), the shell creates /dev/null as a regular file. When the null device uevent is later processed, makedev()'s mknod() fails silently with EEXIST, leaving /dev/null as a regular file permanently. This causes all subsequent redirections to /dev/null to append to the file instead of discarding output, eventually filling up the tmpfs. Fix by explicitly creating /dev/null immediately after mounting the fresh tmpfs, before any other code can run. Signed-off-by: Steev Klimaszewski

hotplug: send event notifications

2025-08-07T13:44:21Z

Sent to per-subsystem ubus objects Signed-off-by: Felix Fietkau

udebug: add support for logging via udebug

2023-11-28T11:48:13Z

Signed-off-by: John Crispin Signed-off-by: Felix Fietkau

procd: clean up /dev/pts mounts

2022-01-11T16:23:25Z

The default mode is already 600, no need to specify it. Access times are also irrelevant. Signed-off-by: Rui Salvaterra

procd: mount /dev with noexec

2022-01-11T16:23:05Z

/dev is writable. Allowing execution inside it makes it a possible attack vector. Kees Cook recently sent a kernel patch [1] in order to mount /dev as noexec and nosuid for systems which rely on CONFIG_DEVTMPFS_MOUNT=y to create/populate /dev, which isn't our case (it's procd's responsibility). Add noexec to the /dev mount flags, since we already use nosuid (and keep the coldplug flags symmetric, while at it). This carries the risk of breaking very old, pre-KMS graphics drivers [2], but it shouldn't be a problem for systems built in the last ~15 years. The vast majority of our targets doesn't have a GPU, anyway. :) [1] https://lore.kernel.org/all/YcMfDOyrg647RCmd@debian-BULLSEYE-live-builder-AMD64/ [2] https://lore.kernel.org/all/CAPXgP12e5LpN6XVxaXOHhH=u8XXN==2reTaJDCoCk4tP4QduDQ@mail.gmail.com/ Signed-off-by: Rui Salvaterra

hotplug.c: set nl_pid to zero

2021-01-26T10:16:18Z

With the current solution where nl_pid is set through getpid we run into problems when running procd in a different PID namespace (e.g. container). The PID number inside the active PID namespace will be set which doesn't match the global PID. Therefore, procd will never receive any netlink messages. By setting nl_pid to zero the kernel will assign the global PID automatically and fixes the issue. Signed-off-by: Stefan Eichenberger Acked-by: John Crispin

treewide: replace local mkdir_p implementations

2020-12-12T22:59:54Z

Replace local implementations of mkdir_p in favour of using the more robust implementation now added to libubox. Signed-off-by: Daniel Golle

procd: replace exit(-1) with exit(EXIT_FAILURE)

2019-10-27T13:22:27Z

Signed-off-by: Michael Heimpold

procd: add start-console support

2019-10-27T13:21:52Z

This adds a hotplug function to (re-)start inittab entries with askfirst or respawn. At the moment the devices used with these actions must be present during boot otherwise such lines are skipped. However, this prevents having inittab entries with consoles for e.g. USB gadget devices which only appear after kernel module loading and after configuring them with configfs. While it was possible to only scan the inittab for the desired item to start, I assume the inittab to be short and re-running the whole list will be negligible. Signed-off-by: Michael Heimpold