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2003-07-29Yang Xiaopeng writes:Eric Andersen
>I'm sure that no user process use old root now, but when run "umount >/old_root", it says: > umount: /old_root: Device or resource busy > >I have tried to remount /proc within the new root *after* chroot, but >get the same result. > > I found the problem, I said that no user process use old root when run my scripts, but I'm wrong, actually there is a '3' fd open the file "/old_root/dev/console". By adding debug message in init/init.c, I found the problem: when init restart(in exec_signal()), before open the new terminal device, there is still a file opened(I don't know which file it is), so the terminal device(stdin) get fd '1', and the first dup(0)(stdout) return '2', the second(stderr) return '3'. I attach a simple patch to solve this problem.
2003-07-26Patch from Thomas Gleixner to reap any zombie processes that areEric Andersen
reparented to init...
2003-07-22Patch from Andrew Flegg:Eric Andersen
Here's a pretty crude patch to reload /etc/inittab when init receives a SIGHUP. The mailing list archives weren't entirely clear on whether or not it should already happen, but didn't appear to be. The patch: * Adds a new function, reload_signal() which just calls parse_inittab() and run_actions(RESPAWN) * Before entering the while (1) loop set up SIGHUP to call reload_signal() * Modify new_init_action to skip the action if the same command already exists on the same terminal This last bit means that changing already running entries is a bit hairy as you can end up with, for example, two shells running on the same virtual console. However, for solely adding/removing entries this patch seems to work quite well.
2003-07-22Remove remaining libc5 support codeEric Andersen
2003-07-14Update a bunch of docs. Run a script to update my email addr.Eric Andersen
2003-07-05oopsEric Andersen
2003-07-05Daniel writes:Eric Andersen
I've found a problem with job control when the init process is restarted. If the system boots for the first time, I get job control on a serial terminal - no problems. However, when I restart init by issuing "init -q", then the shell no longer has job control. I traced this a problem in console_init in the file init.c. What was happening after the restart is that the first compare if (ioctl(0, TIOCGSERIAL, &sr) == 0) { ... } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { ... } else { ... // assume /dev/console } returned error and subsequently the code assumes /dev/console as the console, which does not support job control. Checking the errno after the first call showed that the system was complaining about the file descriptor. This is probably because the previous init process had closed all its file descriptors which the new init process had inherited.
2003-06-27Apply last_patch93 from vodz:Eric Andersen
andersen@busybox.net wrote: >Message: 4 >Modified Files: > init.c >Log Message: >Remove code for unsupported kernel versions Hmm. Current init.c have check >= 2.2.0 kernel one time too. Ok. Last patch removed this point and move common init code to new file for /init dir
2003-06-27Remove bdflush garbage, which is only relevant to unsupportedEric Andersen
kernel versions
2003-04-24There have been many reports of init failing to reboot and/or failing to haltEric Andersen
over the years. Well I finally took the time to track this down. It turns out that inside linux/kernel/sys.c the kernel will call machine_halt(); do_exit(0); when halting, or will call machine_power_off(); do_exit(0); during a reboot. Unlike sysv init, we call reboot from within the init process, so if the call to machine_halt() or machine_power_off() returns, the call to do_exit(0) will cause the kernel to panic. Which is a very bad thing to happen. So I just added this little patch to fork and call the reboot syscall from within the forked child process, thereby neatly avoiding the problem. But IMHO, both calls to do_exit(0) within linux/kernel/sys.c are bugs and should be fixed. -Erik
2003-03-19Major coreutils update.Manuel Novoa III
2003-01-23Fix a silly compile error, thanks to a patch from Wen-chien Jesse SungEric Andersen
2003-01-13Correct some init issues, update email address, last_patch78 by VladimirGlenn L McGrath
N. Oleynik
2002-12-17Odd. I never brought this forward from bb.stable. Should handleEric Andersen
reaping child processes better. -Erik
2002-11-28Use error_msg instead of fprintf(stderrGlenn L McGrath
2002-10-22I committed the fflush in the wrong spot. I should go to bedEric Andersen
earlier so I don't screw up such easy stuff. -Erik
2002-10-22Be absurdly careful about flushing stdout.Eric Andersen
2002-10-12After thinking about it, I think this patch from Matt Kraai is probably theEric Andersen
best way to go. Sysvinit does not provide a controlling tty since it doesn't even try to open ttys for apps. We do. So we should _try_ to provide a controlling tty if possible, but we needn't freak out if it doesn't work. This way we won't need to use openvt or similar, we'll just have init do the Right Thing(tm).
2002-10-10last_patch61 from vodz:Eric Andersen
New complex patch for decrease size devel version. Requires previous patch. Also removed small problems from dutmp and tar applets. Also includes vodz' last_patch61_2: Last patch correcting comment for #endif and more integrated with libbb (very reduce size if used "cat" applet also). Requires last_patch61 for modutils/config.in.
2002-09-30Set the close-on-exec flag, just to be safEric Andersen
2002-09-25Ignoring SIGCHLD causes a race leading to the occasional hang of initEric Andersen
when init will wait() on itself in waitfor() when the child exits before init is scheduled to run. Letting init hang is very seriously bad. -Erik
2002-09-16Let people run SHUTDOWN actions prior to killing everythingEric Andersen
-Erik
2002-09-12Patch from Thomas Gleixner <tglx@linutronix.de> to doEric Andersen
automatic child reaping to avoid zombies
2002-08-26Eliminate use of obsolete sys_errlist[]Eric Andersen
-Erik
2002-08-22Run through indent, fix commentsGlenn L McGrath
2002-07-29Kill a silly warningEric Andersen
2002-07-29Patch from Tim Riker to allow tty* in inittab if the ttyEric Andersen
actually exists -- serial console is not the issue...
2002-07-03This is last_patch48 from vodz. More cleanups, kills a bitEric Andersen
of dead code, fixes one blatent bug.
2002-07-03Apply last_patch47 from vodz to fix several problems, such as the ash "jobEric Andersen
control turned off" bug, console_setup() was called with a closed file descriptor, setsid() inconsistancy, and silly string handling bugs. I have modified his patch to allow the askfirst init actions to have a controlling terminal.
2002-07-03Fix from vodz so that complex init commands actually workEric Andersen
2002-07-03Patch from till busch <buti@gmx.at> -- unblock all signalsEric Andersen
in exec_signal() before calling exec()
2002-05-15Doh! Remember to close /etc/inittabEric Andersen
2002-04-13Update some missing copyright noticesEric Andersen
2002-03-29Provide a controlling tty to askfirst processes as wellEric Andersen
-Erik
2002-03-20Rewind messages to avoid weird formatting, and fix a bug withEric Andersen
CONFIG_FEATURE_EXTRA_QUIET, which was broken
2002-03-05Update init.c per my changes in the stable branchEric Andersen
-Erik
2002-01-25Teach 'init -q' that init's pid may not equal 1Eric Andersen
2002-01-06Oops.Eric Andersen
2002-01-06Do not depend on PATH or getopt arg reorderingEric Andersen
2001-12-20Remove `== TRUE' tests and convert `!= TRUE' and `== FALSE' tests to use !.Matt Kraai
2001-12-17Add in a new restart init target, triggered by SIGHUP. Patch fromEric Andersen
Russ Dill, with adjustments by me. -Erik
2001-11-30Patch from Dan Langlois <dan@somanetworks.com> Support SIGSTOP/SIGCONTEric Andersen
for wierd situations when people want init to actualy stop doing anything for a while...
2001-11-21Fix dangling commaEric Andersen
2001-11-20S390 wierdnessEric Andersen
2001-11-17Hide some ifdefs to make it more readibleEric Andersen
2001-10-28As Aaron Lehmann just pointed out, I forgot a line...Eric Andersen
2001-10-28Add in some (theoretical) uClinux support. Some init cleanupsEric Andersen
2001-10-24Major rework of the directory structure and the entire build system.Eric Andersen
-Erik
2001-10-18Scrub up some function prototypes.Eric Andersen
-Erik
2001-09-05Two patches from Magick <magick@linux-fan.com>:Eric Andersen
1st makes init smaller, and fixes a bug with AskFirst. Reading from /dev/null gives EOF. 2nd makes init run the command's in the order of inittab, as in FIFO instead of LIFO.