Re: [i3] Detecting screen locked
A bit more info. It appears that the sequence of events may be the following: I lock the screen from the keyboard. That key is bound to i3lock --dpms --inactivity-timeout 10 --color=220022 . A bit later, xautolock decides to lock the screen as well. That command, by chance, is not quite the same, which is how I identified the two locks. i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork There is no good reason they are different, but they do both run sometimes. For some reason, the xautolock-launched version sometimes neither asks for my password nor exits. This doesn't happen every time, most of the time, it all works correctly. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 12:50, Michael Stapelberg mich...@i3wm.org wrote: On Fri, Apr 17, 2015 at 3:00 AM, Jeff Abrahamson j...@purple.com wrote: Thanks. I understand (and a bit better, now) why strace/ptrace may have problems with a program that calls setuid. On the other hand, i3lock doesn't have the setuid bit set, and the strace logs do not show an attempt to call strace. [S-18]jeff@siegfried:~ $ stat /usr/bin/i3lock File: ‘/usr/bin/i3lock’ Size: 31912 Blocks: 64 IO Block: 4096 regular file Device: fc01h/64513dInode: 1575208 Links: 1 Access: (0755/-rwxr-xr-x) Uid: (0/root) Gid: (0/root) Access: 2015-04-16 20:02:56.634223226 +0200 Modify: 2014-07-19 01:13:09.0 +0200 Change: 2015-03-04 15:18:43.959784604 +0100 Birth: - [S-18]jeff@siegfried:~ $ grep setuid /tmp/i3lock-log-1429256* 1,[S-18] jeff@siegfried:~ $ This said, if something PAM did when I logged in affects the behavior of stracing i3lock, I do not think I will try to figure out what PAM has done. ;-) But I still find it odd that i3lock would interpret keystrokes differently under strace or not based on what I know so far. It doesn’t. I’m saying the PAM stack (outside of i3’s code) likely requires setuid permission for some modules (most likely pam_unix). Well, I will debug what I can. Maybe I will compile an i3lock with scaffolding over the weekend to see what I can learn. Thanks again. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 11:47, Michael Stapelberg mich...@i3wm.org wrote: See http://superuser.com/a/248127 for why setuid is ignored when running under strace. Given that you run i3lock on linux, it might be PAM which uses setuid in some of its modules. On Fri, Apr 17, 2015 at 1:20 AM, Jeff Abrahamson j...@purple.com wrote: Interesting. How does setuid have this effect on i3lock but only under strace? Any idea where the setuid is coming from or how to find out? The system is pretty vanilla ubuntu 14.10 (they have a good installer) aside from running i3 instead of gnome. The exec path that's visible once I'm logged in is lightdm - lightdm --sesion-child - i3. I see that i3 parents what is executed due to .xsessionrc. I'll try to gather traces with -p, but this will depend on me thinking to trace i3lock from a vt before unlocking the screen. My apologies in advance if I take a long time to catch the occasional errant process that way. And thanks for your ever prompt assistance and insights. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 10:09, Michael Stapelberg mich...@i3wm.org wrote: Ugh, then you’re running it in a setuid setup. You’ll need to start i3lock and then attach strace afterwards using -p. On Fri, Apr 17, 2015 at 9:56 AM, Jeff Abrahamson j...@purple.com wrote: I invoke i3lock at the commandline thus: [S-18]jeff@siegfried:gtd $ strace -o/tmp/i3lock-log-$(date +%s) -f -s 2048 -tt i3lock --dpms --inactivity-timeout 10 --color=220022 [S-18]jeff@siegfried:gtd $ and the result is that i3lock does not recognize my password. It does echo my typing, it just always says fail. I switch to a vt, login, and kill it. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:39, Michael Stapelberg mich...@i3wm.org wrote: Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44
Re: [i3] Detecting screen locked
Good idea, thanks, I'll bind my lock key to that. I think I learned of xautolock after learning that I could lock the screen by binding i3lock to a key. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 1 May 2015 at 17:44, Serge van Ginderachter se...@vanginderachter.be wrote: On 1 May 2015 at 17:40, Jeff Abrahamson j...@purple.com wrote: I lock the screen from the keyboard. That key is bound to i3lock --dpms --inactivity-timeout 10 --color=220022 . If you use xautolock, better trigger a lock through it then, I use the Pause button to lock it like this: bindsym Pause exec xautolock -locknow
Re: [i3] Detecting screen locked
On 1 May 2015 at 17:40, Jeff Abrahamson j...@purple.com wrote: I lock the screen from the keyboard. That key is bound to i3lock --dpms --inactivity-timeout 10 --color=220022 . If you use xautolock, better trigger a lock through it then, I use the Pause button to lock it like this: bindsym Pause exec xautolock -locknow
[i3] Detecting screen locked
I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/
Re: [i3] Detecting screen locked
Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ -- Best regards, Michael
Re: [i3] Detecting screen locked
Interesting. How does setuid have this effect on i3lock but only under strace? Any idea where the setuid is coming from or how to find out? The system is pretty vanilla ubuntu 14.10 (they have a good installer) aside from running i3 instead of gnome. The exec path that's visible once I'm logged in is lightdm - lightdm --sesion-child - i3. I see that i3 parents what is executed due to .xsessionrc. I'll try to gather traces with -p, but this will depend on me thinking to trace i3lock from a vt before unlocking the screen. My apologies in advance if I take a long time to catch the occasional errant process that way. And thanks for your ever prompt assistance and insights. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 10:09, Michael Stapelberg mich...@i3wm.org wrote: Ugh, then you’re running it in a setuid setup. You’ll need to start i3lock and then attach strace afterwards using -p. On Fri, Apr 17, 2015 at 9:56 AM, Jeff Abrahamson j...@purple.com wrote: I invoke i3lock at the commandline thus: [S-18]jeff@siegfried:gtd $ strace -o/tmp/i3lock-log-$(date +%s) -f -s 2048 -tt i3lock --dpms --inactivity-timeout 10 --color=220022 [S-18]jeff@siegfried:gtd $ and the result is that i3lock does not recognize my password. It does echo my typing, it just always says fail. I switch to a vt, login, and kill it. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:39, Michael Stapelberg mich...@i3wm.org wrote: Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ -- Best regards, Michael -- Best regards, Michael -- Best regards, Michael
Re: [i3] Detecting screen locked
Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ -- Best regards, Michael -- Best regards, Michael
Re: [i3] Detecting screen locked
Ugh, then you’re running it in a setuid setup. You’ll need to start i3lock and then attach strace afterwards using -p. On Fri, Apr 17, 2015 at 9:56 AM, Jeff Abrahamson j...@purple.com wrote: I invoke i3lock at the commandline thus: [S-18]jeff@siegfried:gtd $ strace -o/tmp/i3lock-log-$(date +%s) -f -s 2048 -tt i3lock --dpms --inactivity-timeout 10 --color=220022 [S-18]jeff@siegfried:gtd $ and the result is that i3lock does not recognize my password. It does echo my typing, it just always says fail. I switch to a vt, login, and kill it. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:39, Michael Stapelberg mich...@i3wm.org wrote: Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ -- Best regards, Michael -- Best regards, Michael -- Best regards, Michael
Re: [i3] Detecting screen locked
See http://superuser.com/a/248127 for why setuid is ignored when running under strace. Given that you run i3lock on linux, it might be PAM which uses setuid in some of its modules. On Fri, Apr 17, 2015 at 1:20 AM, Jeff Abrahamson j...@purple.com wrote: Interesting. How does setuid have this effect on i3lock but only under strace? Any idea where the setuid is coming from or how to find out? The system is pretty vanilla ubuntu 14.10 (they have a good installer) aside from running i3 instead of gnome. The exec path that's visible once I'm logged in is lightdm - lightdm --sesion-child - i3. I see that i3 parents what is executed due to .xsessionrc. I'll try to gather traces with -p, but this will depend on me thinking to trace i3lock from a vt before unlocking the screen. My apologies in advance if I take a long time to catch the occasional errant process that way. And thanks for your ever prompt assistance and insights. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 10:09, Michael Stapelberg mich...@i3wm.org wrote: Ugh, then you’re running it in a setuid setup. You’ll need to start i3lock and then attach strace afterwards using -p. On Fri, Apr 17, 2015 at 9:56 AM, Jeff Abrahamson j...@purple.com wrote: I invoke i3lock at the commandline thus: [S-18]jeff@siegfried:gtd $ strace -o/tmp/i3lock-log-$(date +%s) -f -s 2048 -tt i3lock --dpms --inactivity-timeout 10 --color=220022 [S-18]jeff@siegfried:gtd $ and the result is that i3lock does not recognize my password. It does echo my typing, it just always says fail. I switch to a vt, login, and kill it. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:39, Michael Stapelberg mich...@i3wm.org wrote: Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ -- Best regards, Michael -- Best regards, Michael -- Best regards, Michael -- Best regards, Michael
Re: [i3] Detecting screen locked
Thanks. I understand (and a bit better, now) why strace/ptrace may have problems with a program that calls setuid. On the other hand, i3lock doesn't have the setuid bit set, and the strace logs do not show an attempt to call strace. [S-18]jeff@siegfried:~ $ stat /usr/bin/i3lock File: ‘/usr/bin/i3lock’ Size: 31912 Blocks: 64 IO Block: 4096 regular file Device: fc01h/64513dInode: 1575208 Links: 1 Access: (0755/-rwxr-xr-x) Uid: (0/root) Gid: (0/root) Access: 2015-04-16 20:02:56.634223226 +0200 Modify: 2014-07-19 01:13:09.0 +0200 Change: 2015-03-04 15:18:43.959784604 +0100 Birth: - [S-18]jeff@siegfried:~ $ grep setuid /tmp/i3lock-log-1429256* 1,[S-18] jeff@siegfried:~ $ This said, if something PAM did when I logged in affects the behavior of stracing i3lock, I do not think I will try to figure out what PAM has done. ;-) But I still find it odd that i3lock would interpret keystrokes differently under strace or not based on what I know so far. Well, I will debug what I can. Maybe I will compile an i3lock with scaffolding over the weekend to see what I can learn. Thanks again. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 11:47, Michael Stapelberg mich...@i3wm.org wrote: See http://superuser.com/a/248127 for why setuid is ignored when running under strace. Given that you run i3lock on linux, it might be PAM which uses setuid in some of its modules. On Fri, Apr 17, 2015 at 1:20 AM, Jeff Abrahamson j...@purple.com wrote: Interesting. How does setuid have this effect on i3lock but only under strace? Any idea where the setuid is coming from or how to find out? The system is pretty vanilla ubuntu 14.10 (they have a good installer) aside from running i3 instead of gnome. The exec path that's visible once I'm logged in is lightdm - lightdm --sesion-child - i3. I see that i3 parents what is executed due to .xsessionrc. I'll try to gather traces with -p, but this will depend on me thinking to trace i3lock from a vt before unlocking the screen. My apologies in advance if I take a long time to catch the occasional errant process that way. And thanks for your ever prompt assistance and insights. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 10:09, Michael Stapelberg mich...@i3wm.org wrote: Ugh, then you’re running it in a setuid setup. You’ll need to start i3lock and then attach strace afterwards using -p. On Fri, Apr 17, 2015 at 9:56 AM, Jeff Abrahamson j...@purple.com wrote: I invoke i3lock at the commandline thus: [S-18]jeff@siegfried:gtd $ strace -o/tmp/i3lock-log-$(date +%s) -f -s 2048 -tt i3lock --dpms --inactivity-timeout 10 --color=220022 [S-18]jeff@siegfried:gtd $ and the result is that i3lock does not recognize my password. It does echo my typing, it just always says fail. I switch to a vt, login, and kill it. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:39, Michael Stapelberg mich...@i3wm.org wrote: Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1.
Re: [i3] Detecting screen locked
I invoke i3lock at the commandline thus: [S-18]jeff@siegfried:gtd $ strace -o/tmp/i3lock-log-$(date +%s) -f -s 2048 -tt i3lock --dpms --inactivity-timeout 10 --color=220022 [S-18]jeff@siegfried:gtd $ and the result is that i3lock does not recognize my password. It does echo my typing, it just always says fail. I switch to a vt, login, and kill it. Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:39, Michael Stapelberg mich...@i3wm.org wrote: Yes, but also use -f (to follow child processes) and -s 2048 (to increase the size of strings) and -tt (to get timing). On Fri, Apr 17, 2015 at 9:23 AM, Jeff Abrahamson j...@purple.com wrote: Sure thing. Just to be clear, do you mean that instead of launching i3lock .. I substitute strace -o/tmp/i3lock-log-$(date +%s) i3lock ...? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ On 17 April 2015 at 09:19, Michael Stapelberg mich...@i3wm.org wrote: i3lock shouldn’t hang around. Can you start stracing all your i3lock instances automatically and provide the corresponding strace output of a hung instance in a bugreport? On Fri, Apr 17, 2015 at 9:04 AM, Jeff Abrahamson j...@purple.com wrote: I have a maintenance function that ought not bother spinning the CPU if the screen is locked. It checks this thus: if pidof i3lock /dev/null; then ... This is i3-specific, which is sad, but not a huge problem. What is a problem is that i3lock sometimes hangs around even though I think it should exit on unlock. And, indeed, most of the time it does exit on unlock. Once in a while, I find I have one or even several i3lock processes hanging around. I either lock my screen explicitly bindsym $mod+Control+L exec i3lock --dpms --inactivity-timeout 10 --color=220022 or else it's done by inactivity xautolock -detectsleep \ -time 3 -locker i3lock --dpms --color=220022 --inactivity-timeout 10 --nofork This question thus has two parts: 1. Am I doing something wrong that I sometimes have multiple i3lock instances? 2. Is there a better way to detect screen lock than pidof i3lock? Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255-- only if I'm in the UK http://jeff.purple.com/ http://blog.purple.com/jeff/ -- Best regards, Michael -- Best regards, Michael
