rc script running twice ???
Debian Linux (embedded), I'm in runlevel 2, and I'm seeing this when I run ps aux: root 496 0.0 1.9 2808 1232 ttyS0S+ 00:00 0:00 /bin/sh /etc/rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0S+ 00:00 0:00 /bin/sh /etc/rc2.d/S40init_xuarts start S40init_xuarts is a script of mine that I just put in /etc/init.d/ and linked from rc2.d. Why is it running twice? I've gone through the first page of possibilities from a google search, I'm hoping one of you can point out my obvious silly mistake, since I'm blanking. -- * Drew Van Zandt Artisan's Asylum Craft Lead, Electronics Robotics * ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: rc script running twice ???
On Thu, Jan 27, 2011 at 2:26 PM, Drew Van Zandt drew.vanza...@gmail.comwrote: Debian Linux (embedded), I'm in runlevel 2, and I'm seeing this when I run ps aux: root 496 0.0 1.9 2808 1232 ttyS0S+ 00:00 0:00 /bin/sh /etc/rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0S+ 00:00 0:00 /bin/sh /etc/rc2.d/S40init_xuarts start S40init_xuarts is a script of mine that I just put in /etc/init.d/ and linked from rc2.d. Why is it running twice? I've gone through the first page of possibilities from a google search, I'm hoping one of you can point out my obvious silly mistake, since I'm blanking. Is 496 the parent of 498, or are they two distinct copies? If so, it's probably because it starts with #!/bin/sh. Typically your S* scripts should exec and background whatever service you're trying to start, not stay running once the system is loaded. Otherwise ps aux would be full of S* scripts. You might want to look at start-stop-daemon in Debian. - Kyle -- * Drew Van Zandt Artisan's Asylum Craft Lead, Electronics Robotics * ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: rc script running twice ???
Two distinct copies; when I run it from the command line, it backgrounds the services I'm trying to start, and works quite well. I do know that if one runs the script twice in parallel (e.g. start a second copy before the first finishes) that they both hang and never finish. (There are also two identical copies of one of the commands in the script in the process table, hung and waiting). Everything the script runs is run as a daemon. (They do need to be started in order, though hardware init for 8 UARTS implemented in an FPGA.) --DTVZ On Thu, Jan 27, 2011 at 2:38 PM, Kyle Smith askr...@gmail.com wrote: On Thu, Jan 27, 2011 at 2:26 PM, Drew Van Zandt drew.vanza...@gmail.comwrote: Debian Linux (embedded), I'm in runlevel 2, and I'm seeing this when I run ps aux: root 496 0.0 1.9 2808 1232 ttyS0S+ 00:00 0:00 /bin/sh /etc/rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0S+ 00:00 0:00 /bin/sh /etc/rc2.d/S40init_xuarts start S40init_xuarts is a script of mine that I just put in /etc/init.d/ and linked from rc2.d. Why is it running twice? I've gone through the first page of possibilities from a google search, I'm hoping one of you can point out my obvious silly mistake, since I'm blanking. Is 496 the parent of 498, or are they two distinct copies? If so, it's probably because it starts with #!/bin/sh. Typically your S* scripts should exec and background whatever service you're trying to start, not stay running once the system is loaded. Otherwise ps aux would be full of S* scripts. You might want to look at start-stop-daemon in Debian. - Kyle ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: rc script running twice ???
Drew Van Zandt drew.vanza...@gmail.com writes: Debian Linux (embedded), I'm in runlevel 2, and I'm seeing this when I run ps aux: root 496 0.0 1.9 2808 1232 ttyS0 S+ 00:00 0:00 /bin/sh /etc/ rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0 S+ 00:00 0:00 /bin/sh /etc/ rc2.d/S40init_xuarts start S40init_xuarts is a script of mine that I just put in /etc/init.d/ and linked from rc2.d. Why is it running twice? Can you do this again, but with ps faux instead--to capture the process-hierarchy? -- Don't be afraid to ask (λf.((λx.xx) (λr.f(rr. ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: rc script running twice ???
I've never used the ps f view (yes, I know...how odd); handy. root 470 1.1 2.4 2992 1516 ttyS0Ss+ 00:00 0:00 /bin/sh /etc/init.d/rc 2 root 496 0.1 1.9 2808 1232 ttyS0S+ 00:00 0:00 \_ /bin/sh /etc/rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0S+ 00:00 0:00 \_ /bin/sh /etc/rc2.d/S40init_xuarts start root 500 0.1 0.9 1676 576 ttyS0S+ 00:00 0:00 \_ sed s/ttyname=// root 502 0.0 0.4 1712 308 ?Ss 00:00 0:00 /usr/local/bin/xuartctl -d --speed=115200 --mode=7e1 -p 1 root 503 0.0 0.3 1720 244 ?Ss 00:00 0:00 /usr/local/bin/xuartctl -d --speed=115200 --mode=7e1 -p 1 Note the -d daemonizes xuartctl in the script below: ts7500:/etc/init.d# more init_xuarts.sh #!/bin/sh # Server for all first. xuartctl -d # Barcode ln -s -f `/usr/local/bin/xuartctl -d --speed=115200 --mode=7e1 -p 1 21 |sed s/ttyname=//` /dev/barcode # Copleys ln -s -f `/usr/local/bin/xuartctl -d --speed=9600 --mode=8n1 -p 2 21 |sed s/ttyname=//` /dev/copley # Watlows ln -s -f `/usr/local/bin/xuartctl -d --speed=38400 --mode=8n1 -p 5 21 |sed s/ttyname=//` /dev/watlow On Thu, Jan 27, 2011 at 3:21 PM, Joshua Judson Rosen roz...@geekspace.comwrote: Drew Van Zandt drew.vanza...@gmail.com writes: Debian Linux (embedded), I'm in runlevel 2, and I'm seeing this when I run ps aux: root 496 0.0 1.9 2808 1232 ttyS0S+ 00:00 0:00 /bin/sh /etc/ rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0S+ 00:00 0:00 /bin/sh /etc/ rc2.d/S40init_xuarts start S40init_xuarts is a script of mine that I just put in /etc/init.d/ and linked from rc2.d. Why is it running twice? Can you do this again, but with ps faux instead--to capture the process-hierarchy? -- Don't be afraid to ask (λf.((λx.xx) (λr.f(rr. -- * Drew Van Zandt Cam # US2010035593 (M:Liam Hopkins R: Bastian Rotgeld A:Walton Shipley) *Artisan's Asylum Craft Lead, Electronics Robotics ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: rc script running twice ???
Drew Van Zandt writes: /etc/rc2.d/S40init_xuarts start root 498 0.0 0.8 2808 504 ttyS0S+ 00:00 0:00 \_ /bin/sh /etc/rc2.d/S40init_xuarts start root 500 0.1 0.9 1676 576 ttyS0S+ 00:00 0:00 \_ sed s/ttyname=// . # Barcode ln -s -f `/usr/local/bin/xuartctl -d --speed=115200 --mode=7e1 -p 1 21 |sed s/ttyname=//` /dev/barcode # Copleys ln -s -f `/usr/local/bin/xuartctl -d --speed=9600 --mode=8n1 -p 2 21 |sed s/ttyname=//` /dev/copley # Watlows ln -s -f `/usr/local/bin/xuartctl -d --speed=38400 --mode=8n1 -p 5 21 |sed s/ttyname=//` /dev/watlow I think that your multiple S40init_xuarts entries in the process table are a result of the subshells that you are running via `backticks`. This is the behavior of the shell. Furthermore, since you are apparently seeing something hang here, I'll bet that one of your invocations of /usr/local/bin/xuartctl is hanging somehow. If it wasn't hanging, then you'd have a very difficult time seeing this in the process table. Regards, --kevin -- alumni.unh.edu!kdc / http://kdc-blog.blogspot.com/ GnuPG: D87F DAD6 0291 289C EB1E 781C 9BF8 A7D8 B280 F24E Wipe him down with gasoline 'til his arms are hard and mean From now on boys this iron boat's your home So heave away, boys. -- Tom Waits ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
