Connected From This We ensure bounded interrupt latencies by the standard approach of introducing a few, carefully placed, interrupt points. On detection of a pending interrupt, the kernel explicitly returns through the function call stack to the ker- nel/user boundary and responds to the interrupt. It then restarts the original operation, including reestablishing all the …
Monthly Archives: August 2011
TERM signal ——–x a user space interrupt
Connected From This 1. kill command can be used to send TERM signal. 2. SIGTERM 15 Term Termination signal Signal is an user space interrupt. Sending a Signal The following system calls and library functions allow the caller to send a signal: raise(3) Sends a signal to the calling thread. kill(2) Sends a signal to …
make – GNU make utility to maintain groups of programs
A UNIX Command $make gcc -g -O2 -lcairo -I/usr/include/cairo/ -L/usr/lib/ `pkg \ -config –cflags –libs gtk+-2.0 gthread-2.0` – \ DVERSION=\”0.0.1\” language.c -o language $ $ls autom4te.cache config.status configure.in CVS language Makefile TODO config.log configure COPYING Documentation language.c Makefile.in $ Sample Makefile Contents CC = gcc VERSION = 0.0.1 CFLAGS = -g -O2 -lcairo -I/usr/include/cairo/ -L/usr/lib/ …
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history – shows command history
A UNIX Command $history 11 ls 12 vi kernel_start.s 13 as kernel_start.s 14 ls -l 15 sh a.out 16 ls 17 vi kernel_start.s 18 ls 19 cd linux/ 20 ls 21 cd boot/ 22 ls 23 as boot.s 24 cd 25 cd linux-2.6 26 ls 27 cd arch/ 28 ls 29 cd .. 30 find …
nohup – run a command immune to hangups, with output to a non-tty
A UNIX Command $nohup ls < /dev/null nohup: appending output to `nohup.out' $cat nohup.out Desktop Downloads JohnySagariga LeanBiz.zip nohup.out $ls Desktop Downloads JohnySagariga LeanBiz.zip nohup.out $ $nohup top < /dev/null nohup: appending output to `nohup.out' $cat nohup.out Desktop Downloads JohnySagariga LeanBiz.zip nohup.out top: failed tty get $nohup top < /dev/ nohup: appending output to `nohup.out' …
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chrt – manipulate real-time attributes of a process
A UNIX Command $chrt -m SCHED_OTHER min/max priority : 0/0 SCHED_FIFO min/max priority : 1/99 SCHED_RR min/max priority : 1/99 SCHED_BATCH min/max priority : 0/0 SCHED_IDLE min/max priority : 0/0 $chrt -b -p 0 4555 $chrt -p 4555 pid 4555’s current scheduling policy: SCHED_BATCH pid 4555’s current scheduling priority: 0 $chrt -o -p 0 4555 …
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vdir – list directory contents
A UNIX Command $vdir symmel/ total 20 drwxr-xr-x 2 jeffrin jeffrin 4096 Jul 27 01:11 Docs -rw-r–r– 1 jeffrin jeffrin 88 Jul 25 00:57 kernel_start.asm -rw-r–r– 1 jeffrin jeffrin 78 Jul 25 00:57 kernel_start.s drwxr-xr-x 10 jeffrin jeffrin 4096 Jul 25 00:57 linux drwxr-xr-x 2 jeffrin jeffrin 4096 Jul 26 23:55 loader -rw-r–r– 1 jeffrin …
write — send a message to another user
A UNIX Command $bsd-write jeffrin 8 bsd-write: jeffrin is not logged in on 8 $bsd-write jeffrin tty8 bsd-write: jeffrin has messages disabled on tty8 $mesg y $bsd-write jeffrin tty8 bsd-write: jeffrin has messages disabled on tty8 $w 20:08:58 up 23 min, 3 users, load average: 0.02, 0.15, 0.16 USER TTY FROM LOGIN@ IDLE JCPU PCPU …