[00:23] Hi guys I'm having issues with modprobe, when i modprobe a new driver it returns error module: version magic '4.15.0.55-generic SMP mod_unload' should be '4.15.0-58-generic SMP mod_unload' [00:24] idea how do i fix it ? [00:24] manjeets: that means your module was intended for a different kernel [00:24] how to fix it depends upon how you got to this point :) [00:25] sarnold, my machine has kenrl 58 version [00:26] is there a way I can explicitly point modprobe to specific version ? [00:26] manjeets: insmod can take a specific path [00:26] manjeets: that way you can give the path to the version of the module compiled against the 58 headers [00:28] isc-dhcp-server, how to define the dhcp-server's own IP? [00:29] so i have an AWS Ubuntu Server... on there im running MySQL database. How can i create an ssh tunnel so that my local web application can communicate with the MySQL DB [00:29] all tutorials are greatly explain everything except that, how to get an IP address for itself! [00:32] sarnold, sudo insmod pathto_ko returns same thing [00:33] manjeets: do you need to recompile your module? how did you build it? [00:34] ausjke: you just give the server one with eg netplan or /etc/network/interfaces, depending upon what release you're using [00:34] ausjke: make sure you don't configure the dhcpd to hand out the address it's already using :D [00:35] its basically a ethernet driver followed instructions from documentation untar the i40e driver and make install [00:36] entry_lvl_dev: something like ssh -L 3306:awshostip:3306 [00:36] sarnold, networking on my machine is screwed up (with i40 update) its not even detecting nic cards [00:37] sarnold, recompiled the driver and insmod just worked [00:37] thanks appreciate it :) [00:37] manjeets: woot :) [00:38] does insmod persists reboot ? [00:38] no [00:38] /etc/modules-load.d/ is probably the best answer if it doesn't autoload for whatever reason [00:40] sarnold and then i would just need tell my local enviornment to connect to localhost 3306 and it should work fine right? [00:40] entry_lvl_dev: yeah [00:41] thanks sarnold [00:42] you're welcome entry_lvl_dev, have fun :) [00:45] sarnold: it works, thanks! [00:45] ausjke: nice :) [01:06] Does LD_LIBRARY_PATH not apply to stuff in /lib64 or something? [01:09] I have one thing in that directory and it's not a useful executable [01:09] what are you trying to do? [01:12] I'm pretty sure lib64 is deprecated [01:14] Yeh, it's /lib64/ld-linux-x86-64.so.2 [01:15] genii: I'm trying to install p7zip so I can read zip files from PHP on a system with no root access. Stupid, I know. === zbenjamin is now known as Guest50711 === zbenjamin_ is now known as zbenjamin [01:17] That file should actually be a symlink to /lib/x86_64-linux-gnu/ld-2.27.so [01:18] Yeh, I even corrected the symlink to point to the right place. Still nothing [01:19] I've created a test environment; I can move everything to home as long as I symlink /home/username/lib64 to /lib64. It works perfectly if I do that and set LD_LIBRARY_PATH. But it can't find /lib64/ld-linux-x86-64.so.2 if I don't create the symlink, and I can't cuz I'm not root. [01:21] CoJaBo: so.. why doesn't apt install p7zip work? [01:21] sarnold: Because it needs root [01:22] ahh [01:22] I've installed p7zip to a folder, but I can't actually get it to run from that folder, because the /lib64 path seems to be permanently hardcoded somehow [01:24] so, how'd you do that? apt download, then ar x, then tar xf ? [01:25] sarnold: Copied it from my own system, which has it installed [01:25] CoJaBo, `ldconfig -p` will print cache of dirs & candidate libs currently available.. [01:27] CoJaBo: is your local system identical to the one where you don't have root? [01:28] sarnold: Not completely, so I may hit other problems down the road; I'm first trying to get it to work on my system [01:29] CoJaBo: does the system have python installed? [01:29] so you have access to the php zipfiles you want to read? [01:30] No Python, but it works if I hexedit the path in the binary [01:30] i have a static-ip isc-dhcp-server running on ubuntu18.04 supplying IP to raspberry pi, all is well, rpi grabs first IP from 192.168.1.100-200 pool which is 192.168.1.100, somehow after a few minutes, my dhcp-server itself discards 192.168.1.1 and assign itself a 192.168.1.101 ip addr, what gives? [01:31] Not really sure why I didn't think of that sooner [01:31] That was the only problem, it also works just fine now in the production server [01:32] Things I've tried that failed: ZipArchive (not installed), unzip (same issue as 7zip), and busybox unzip (I hit a bug in it I can't work around) [01:41] peazip portable, perhaps? https://www.peazip.org/peazip-portable.html [01:41] oh wait, windows.. [01:47] Yeh, has to run under Linux [01:47] 7z even HAS a portable version. It just doesn't work, cuz it's not actually a static build. [02:24] Need help! Trying to dual-boot ubuntu with windows 10 already installed, and the ubuntu installer won't detect my hard drive. Here is the output of fdisk -l : https://pastebin.com/pvv5BP8r [02:25] It appears its only detecting the live-usb [02:29] areth: Thoughts: Secure boot and fast boot disabled; booting the installer in EFI mode ? [02:31] Thanks, actually yes I should have said, have disabled fast boot / secure boot [02:31] Does booting the installer in EFI mode mean selecting the EFI option when creating the usb in rufus? [02:31] Because that's what I did [02:32] areth: I an not that EFI experienced - but in your firmware make sure to select an appropriate EFI boot selection. [02:35] I'm not sure what means, firmware I assume means selecting EFI boot in the bios? [02:35] Hmmm... reading this guide (because you should always read guides after you've wiped the computer), would suggest I should change SATA to AHCI in the BIOS: https://www.debugpoint.com/2019/01/complete-guide-how-dual-boot-ubuntu-windows/ [02:36] I'll restart and try that now, appreciate the help Bashing-om :) [03:00] Good day people [03:07] What's the meaning the *depend with/out the | char on this output? [03:08] https://bpaste.net/show/3OIP [03:08] sorry for the delay [03:27] chieta: my guess is that they indicate alternative groups: ghostscript + libgs-dev, or ghostscript-dbg + ghostscript + libgs-dev, or ... [03:29] noted delta [05:28] Good Morning [05:29] What is this regression in dovecot (see USN-4110-3)? Where can I get the sourcecode / diff of both releases? [05:30] oh, never mind. === SuperL4g is now known as SuperLag [06:11] i m dancer now, so i don’t know i must do dancing or learning computer [06:11] :( [06:13] this is me : https://www.youtube.com/watch?v=vhWzEuSZsac [07:18] Hello [07:18] I am trying to understand the Ubuntu Software center [07:19] It often tells me about updates, and I can just click "Update all", without knowing what is being updated. It is probably flatpaks and snaps [07:19] but is it on purpose the updates are not listed, or is it just my system? === export_ is now known as export [07:35] rva: think software centre updates software from software centre, full system updates are via apt or your update manager, and snaps are getting auto updated from the background too [07:37] rva: to see whats going on exactly, you could launch gnome software from a terminal and a new terminal journalctl -f and see whats all happening in the background [07:54] Hey all - I'm using vscode to edit my project files that are in a mounted remote sftp folder. If I weant to use the "terminal" window, I believe, vscode tries to run a remote terminal and fails. Is there any way to use the local terminal insted, in vscode? [08:03] lotuspsychje: thanks, I will try the journalctl next time [08:08] https://bpaste.net/show/OGO_ any help with network namespaces? [08:20] Hi there. I have a new laptop, a Lenovo Thinkpad X1 Yoga, 4th Gen [08:21] It's a gorgeous machine, but I'm finding that somethings don't work out of the box with ubuntu [08:22] So far, it's just. 1. Microphone input. 2. Speakers are configured weird. 3. The stylus buttons aren't configured. [08:22] I believe I might be able to fix them [08:22] Does anyone know how to balance/configure the audio channels for the audio card? [08:22] It seems there's a subwoofer, center, and tweeters. maybe a 3.1 or 4.1 system? [08:24] cluelessperson, I'd try `pavucontrol` (Pulse Audio Volume Control); I've only used stereo but it lets me control left vs right; maybe for you (output devices; click unlock) [08:26] guiverc nice, yeah, I already have that installed, but good example. Yes, the speaker channels are all screwed up in mapping [08:27] rear left is actually front right [08:27] and if I mute everything, if I enable rear slider at all, it sounds 100%, even at 1% [08:27] so something is definitely going on [08:33] reading up on lenovo specifications, it seems to have "quad speakers" [08:33] probably tweaters and then bass [08:33] okay, so it is stereo [08:37] cluelessperson, sorry I can't help, if patient someone else maybe able to help more [08:38] guiverc well that's on the right track. :) I'm able to select the right audio "mode" 4.0 (quad speakers), but now it's a matter of balancing audio [08:39] guiverc and, I happen to have some experience calibrating audio. ;) [08:39] I can play pink noise, and use a high quality microphone + spectrum analyzer to relatively calibrate the audio curve [08:39] however, that leaves the problem of subwoofer sticking at 100% if it's on at all [08:50] Hello, I am installing RJ45 mural plugs in my house. I'd like to test if they work properly. I do not have a router, but I have two Ubuntu laptops. If I connect one at each end of my mural plug, can I test them out? [08:52] Antoine- Google "RJ45" Pinout, pick either A or B to use across the board. [08:53] Antoine-: if at least one machine has an auto-MDIX 100MBit port or a gigabit port, yes. You can check with mii-tool [08:53] and it's A on both ends, or B on both ends, not A-B [08:53] Antoine-: if you have two non-MDIX 100Mbit ports, you'll need a crossover cable [08:53] Antoine- Your laptops should autonegotiate a 1G link. [08:53] modern equipment supports without crossover. [08:54] Antoine- On each laptop, just do `tail /var/log/syslog` and connect the link. [08:54] you should see 1G negotiated [08:55] doesn't matter if there's an ip or not [08:55] tail -F is helpful for stuff like that ;) [08:55] yeah, sorry, I meant tail -f ;) [08:59] I haven't looked up RJ45 A or B yet. I do not know what auto-MDIX mean. I just connected my two laptops with an Ethernet cable to see what it does when the cable works (I assume its not crossover). In syslog, I get "Link is up - 1Gbps/Full - flow control rx/tx" then some lines, and a lot of DHCPDISCOVER stuff [09:01] Antoine- did the RJ45 outlet thingies have color codes on them, and did you wire them up with those color codes? [09:02] Antoine- RJ45 "A" or "B", is basically the color/wiring scheme you're generally supposed to use, but as long as you see that 1Gbps text, it's fine. [09:02] cluelesaperson: I haven't started yet. I just wanted to know how to try them out when I'm done [09:02] that 1Gbps thing is all you need to see. [09:03] So I guess when I'm done I can plug a laptop at each end and I'm supposed to see what I told you in syslog, right? [09:03] yeah. [09:03] Antoine- Basically your adapter should automatically test the various lines and autonegotiate 1M, 10M, 100M, or 1000M(1G) [09:04] Great :). Then about layout A and B, can I chose whichever I prefer? Wonder why there are two different layout. Do they work the same? Can my laptop use both then? [09:07] Antoine- Just use A. I don't know the exact history. [09:07] https://acuitysupport.zendesk.com/hc/en-us/articles/210113548-What-is-the-difference-between-T568A-T568B- [09:08] Antoine- I think A-B is used to make "crossover cables" from when old equipment didn't support automatically connecting two devices directly to each other. [09:09] hi guys Ubuntu 18.04.3 LTS - When I plugin Platronics USB headphones, the keyboard layout changes to US. Does anyone know how can i debug it? [09:10] Antoine- EACH computer has IN/OUT IN/OUT and you had to match them up to let them talk to each other. [09:10] OUT -> IN [09:10] IN <- OUT [09:11] Mad_Dud tail -f /var/log/syslog observe usb changes occuring and why. [09:11] presumably your headphones are misread as some sort of keyboard input, causing a input change [09:12] or the power change causes your usb system to reset, causing an input change [09:12] Mad_Dud lastly, does your keyboard layout default to US? and do you manually change it to something else? [09:15] cluelessperson: thanks for suggestion. by default i use us dvorak. i configured it with "dpkg-reconfigure keyboard-configuration" and restarted OS. when i plugin the headphones, the layout canges from dvorak to us. when us is setup and i plug headphones in, it doesn't change to anything else [09:15] the syslog shows some messages "unhandled action 'bind' on ..." [09:16] and there is this line: "usb 1-4.4.2: Warning! Unlikely big volume range (=8192), cval->res is probably wrong." [09:16] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1708495 [09:16] Launchpad bug 1708495 in linux (Ubuntu) "usb 3-1: Warning! Unlikely big volume range (=10361), cval->res is probably wrong." [Low,Expired] [09:17] ubottu++ [09:18] heh. automatic ticket. closed without resolution. related to autio. [09:19] Mad_Dud can you provide a paste link containing the last 100 lines or so? tail -n 200 /var/log/syslog when you plugin the usb device? [09:19] this platronics has got volume up/down etc buttons... it might be acting as a keyboart too [09:19] Mad_Dud my thinking is your usb system is resetting maybe, and resetting the keyboard input [09:19] or something [09:19] cluelessperson: where would you like me to upload it? [09:19] Mad_Dud ah, yeah, that sounds like that's probably it. [09:20] Mad_Dud you might configure ubuntu to ignore the new keyboard connected, or something [09:20] or at least not change input when a new keyboard is connected [09:21] ok. i will try to figure it out "not change input" [09:21] cluelessperson: Ok, thanks for your help :) === jmcgnh_ is now known as jmcgnh === jmcgnh is now known as jmcgnh_ === jmcgnh_ is now known as jmcgnh === xeon is now known as bqq === abbiya_ is now known as abbiya === abbiya_ is now known as abbiya [10:43] Hi I have a headless server, I was hoping someone might know of a distro that has openssh server enabled by default or how to enable it on the ubuntu live usb drives [10:44] jacks_ for what purpose? [10:45] lots of purposes [10:45] recovery / building lfs [10:47] back [10:47] who was I responding to? [10:47] me [10:47] jacks_: you can enable it yourself and make it a distro [10:48] jacks_ open a terminal, apt-get update && apt-get install openssh-server [10:48] might have to configure a user [10:48] jacks_ what are you actually trying to do though? [10:49] well it doesn't have a monitor, it has no keyboard [10:49] Ubuntu crashed when I hit Ctrl+Shift+F1 [10:49] i just wanted something i can plug in, eg. usb flash drive, it boots and starts ssh server [10:50] jacks_ multiple ways to do that, could install to USB drive entirely and just install ssh server there. [10:50] bqq: i didn't want to reinvent the wheel. must be some distro someone knows of that has ssh enabled by default as a live usb bootable distro [10:51] hmm good point [10:51] jacks_ it's kinda a security issue. [10:51] i might try that [10:51] I dunno i'm not really bothered by it [10:52] I'll try installing on to a dest usb drive [10:52] thanks dunno why I didn't think of that myself [10:52] jacks_ Do this. Install alpine linux onto a usb drive, and add an ssh server. It's super minimal, like 5-10MB total [10:53] size doesn't bother me so much, would be good if it was ubuntu tho because of build tools [10:53] jacks_ alpine has build tools. :P [10:53] i got plenty of flash drives so ill give it a shot [10:53] https://github.com/alpinelinux/alpine-chroot-install [10:53] cool [10:53] i'll check it out [10:54] I'm thinking it might be as easy as. chroot-install alpine on usb, chroot install grub bootloader on usb, chroot apk add ssh-server, chroot enable openrc service ssh server on boot [10:55] see if that boots. You wind up with a minimal imzge. [10:55] image [10:55] cool [10:55] if you prefer debian/apt, you can use debootstrap [10:56] thanks [10:57] cluelessperson: 5m-10m is that small? standand alpine >117M [10:58] bqq I could be incorrect, I thought it was much smaller. [10:58] Anyway, great for creating nice ram based boots [11:00] cluelessperson: grub2 itself 8M [11:02] Hey folks [11:02] sup [11:03] cluelessperson: but alpine is still perhaps the smallest decent distro over there [11:03] dunno where I got the number from [11:03] I'll have to look up and compare them [11:04] dsl 50m, puppy over 100m [11:05] bqq I strip them down to minimal packages. [11:06] I thought dsl was 5M [11:09] there are some distro <5m but barely decent useful === subopt is now known as _subopt_in_repos === GWM-Deus is now known as GWM [12:31] helloo i need help with something small and weird, i want to fix an error in my log i keep getting that just says eno1: DHCP lease expired and it wont seem to go away no matter what i try elsewhere. [12:31] i can use the internet fine but that just wont go away [12:37] How do I get an 18.04 server to completely forget about a dhcp IP? I've cloned this VM and it keeps trying to take the original VMs IP... [12:46] anyone familiar with update-manager getting stuck on a brave browswer update [12:47] i uninstalled brave but it still keeps trying to download an update from there and it never finishes and slows down my whole computer [12:47] i'd much rather see ads than this nonsense [12:47] bnason, maybe helpful - https://help.ubuntu.com/lts/serverguide/network-configuration.html (has dynamic & static addressing info) [13:17] guiverc: thanks, i added dhcp-identifier: mac to my /etc/netplan/50-cloud-init.yaml and ran netplan apply and that seems to have worked [13:17] :) [13:20] I accidentally used the command line tool pastebinit tool to paste a doc with sensitive info. How do I get it removed from the server at http://paste.ubuntu.com [13:21] newhorn: You can't [13:21] :O [13:22] Please what can I do? Wouldn't this be publicly viewable? [13:23] newhorn, anything on paste.ubuntu.com is publically viewable, that's what it's for [13:24] newhorn, in time it'll disappear (it's not long term storage; see https://paste.ubuntu.com/ for details) [13:24] newhorn: You might be able to get assistnace via e-mailing "rt@ubuntu.com" ... there are no guarantees there. This channel is run by volunteers, no one here has any control over Canonical's web properties, including paste.ubuntu.com [13:25] newhorn: If it is any consolation, the page is flagged to not be indexed by any web bots that respect the robots.txt. If you have passwords in that file, I suggest you start changing those right away. [13:26] guiverc, pragmaticenigma: Many thanks. [13:29] Hey! I have a little problem here with date. For some reason my VM's clock is staying behind all the time. When I run ntpdate -u pool.ntp.org it updates back to real time.. but after few hours it's about 20 min behind again. Any idea what might be wrong? I can't see anything in syslog that would look like ntp error something. [13:29] battery?? [13:29] When I run timedatectl then this is the output: https://paste.ubuntu.com/p/V76tDC9WMx/ [13:30] It says "NTP synchronized: no" not sure why [13:30] Diplomat: That would be a question to register with the developer of the Virtual Machine software [13:30] Diplomat: your host have the right time ? [13:31] Not sure really.. It's just a VPS that I bought some time ago [13:31] But I can ask from the host [13:31] Too early for me, I didnt read the post properly from Diplomat [14:00] Hello, I've just installed Ubuntu 18.04.2 on a cheap laptop, it won't detect the built-in wifi adapter and the laptop has no wired network card, how can I go about finding the right drivers and getting them installed on the machine? [14:00] Snowy_, can you 'lsusb' or 'lspci' or 'lshw'? [14:03] yes I just ran all 3 commands, I cannot find anything that looks like a wireless card ( how do I mention someone in a message? ) [14:03] Snowy_, like i do here - your nick, plus a comma (or a colon : ) [14:03] I'm trying to understand an SSH issue, can someone tell me if this is normal? I have a Ubuntu server with a user 'deployer'. That users home dir has a .ssh folder, and an "authorized_keys" file. That file contains a single public key (not know which key this is). My colleague, who connects with his own personal key (which looks totally DIFFERENT from the one in authorized_keys) can connect successfully. How does this make sense? [14:04] Snowy_, can you show the output of all 3? we understand that you cannot copy/paste from the machine so maybe a photo? [14:04] And by different, I mean we are comparing his public key to the public key stored in authorized_keys (we're not confusing it with the private key) [14:04] kettlecooked, i don't suppose you want to show us the two public keys? [14:06] you know what.. I think asking for that might've solved it. It's all concatenated on a single line, vs our other servers where it's all newline delimited. Did not spot until now [14:06] kettlecooked, happy to be your rubber duck :) [14:09] Habbie, here: https://pastebin.com/uBDQ4VDq [14:11] Snowy_, line 4 is interesting [14:12] Bus 001 Device 007: ID 6080:8061 ? [14:12] Snowy_, i cannot find any references to vendor 6080 online anywhere [14:12] yes [14:12] oh, https://github.com/linuxhw/LsUSB/blob/master/Tablet/README.md says it's a keyboard [14:13] Snowy_, how did you get this data from the laptop to the pastebin? [14:14] Habbie, saved on a text file and copyed between machines with a thumbdrive [14:14] Snowy_, that is much appreciated from this side :) [14:14] Snowy_, is it possible that the wireless is disabled by some hardware switch? Fn-someFunctionKey perhaps? do you have 'rfkill' installed? [14:16] Habbie, there is no hardware switch or fn-key combination to disable the wifi afaik, I don't know how to check for rfkill [14:16] Snowy_, 'apt show rfkill' or 'dpkg -l rfkill' or just try 'which rfkill' at a root prompt [14:17] Habbie, it seems to be installed [14:18] Snowy_, i haven't used it; so now you get to figure out if it can enable your wifi somehow [14:18] Snowy_, i have no idea if this will help [14:19] Snowy_, when you run rfkill, does it show anything? [14:21] coz_, I've tryed "rfkill list" and it gives no output at all [14:22] Habbie, one important bit of information, upon installation I've been asked if I wanted to enable 3rd party drivers, and was asked to provide a password to do so, which will be asked for at next boot, but I haven't noticed any prompt for it, did I miss something there? [14:26] Snowy_: try ubuntuforums.org or askubuntu.com if it isn't fixed here [14:29] jeremy31, noted, thanks === Wryhder is now known as Lucas_Gray [14:43] Snowy_, i'm out of ideas, sorry.. good luck [14:54] Habbie, no problem, I've found a bigger problem right now, the battery seems to be swelling, I defnetly want to get that checked, thanks for your time! [14:54] To understand the load average given in `top` I understand that the number of CPU the system has. How many single CPU does this system appear to have? -> Processors | physical = 1, cores = 2, virtual = 2, hyperthreading = no [14:54] 2, right? [14:55] crised, that sounds like 1 physical CPU socket, with 2 cores. [14:55] lordcirth_: correct, but top would count this as 2, right? [14:55] Yes. [15:55] @tomreyn: Back to the "pull DHCP at boot" question... I'm not entirely sure how to "edit the network configuration", but I found this: https://help.ubuntu.com/lts/serverguide/network-configuration.html <-- is that what you're talking about? [16:05] sudoISS: if you run the latest Ubuntu Server LTS release, 18.04, that's a yes. [16:07] sudoISS: you really should read some documentation if you're running a server, especially if it's on the internet. [16:07] It's a VM on my local machine which I use to generate certs. :| [16:09] I'm just trying to learn a lot of this stuff, but the behavior of being connected to a network and NOT requesting a DHCP lease is... uh, different, and I was wondering how to fix it post-install. I just used the standard ISO to install it into the Hyper-V instance. [16:10] static network configurations are actually pretty common in a server environment. [16:10] hi [16:11] @tomreyn: I'm aware [16:11] and probably more common than dynamic ones overall. still, changing your configuration to do DHCP shouldn't be difficult, really. [16:11] @tomreyn: We're actually using them, for the most part, here [16:11] i see [16:12] see how far you can get, and if there are any issues, ask in #ubuntu-server, i'd say. [16:13] (btw. there's no need for @ in front of nicknames on IRC) [17:14] anyone know of any decent linux support companies? trying to get a quote for some server management. [17:15] rcp, try #ubuntu-discuss [17:19] where is Xorg.0.log on 18.04? [17:20] is it ~/.local/share/xorg/Xorg.0.log ? [17:20] weird location for that [17:20] de-facto, /var/log/Xorg.0.log for me [17:21] But I think it depends, because different login managers start it as root or as your user? Not sure. [17:22] something like that, i searched for /var/log/Xorg.0.log and was a bit surprised that it is not present [17:23] I am trying to find the cause of gnome3 freezes starting with later updates (not sure which package exactly) [17:24] dmesg and Xorg.0.log are clear afaik [17:25] the /var/log/gdm3/ is empty...? [17:26] dang whats going on with logfiles?! [17:37] de-facto, I run locate Xorg.0.log and found it in ~/.local/share/xorg/Xorg.0.log [17:44] diskin, yeah that seems to be the new location for some reason [17:45] how do i get the actual path of a process from its pid, without resorting to /proc? cos /proc apperas to give me junk sometimes (i.e clearly not a valid path...or not a path that actually exists on the system) [17:45] banisterfiend, why do you want this? [17:45] banisterfiend, and, what part of /proc is disappointing you in this regard? [17:45] Habbie /proc/PID/exe is disappointing me [17:46] i just want the actual path a process was started from [17:46] in macos you can just do: proc_pidpath() [17:46] but it seems much more tricky in linux? [17:46] i mean, surely you have a reason for wanting this, and perhaps that reason has other solutions as well [17:46] Habbie ah, i want to be able to route traffic for certain applications differently, based on their path [17:47] hmm, can't you execute into some cgroup for that? [17:47] i hook the process creation, check the path based on pid, and then add that pid to the cgroup, if it's a path i care about [17:47] but, also, how is /exe failing for you? [17:47] ok [17:47] so we're pretty much aligned on the methods [17:47] Habbie well i can't use cgexec, cos the apps might be already running [17:47] Habbie it's for customers/end users [17:47] if it was just me i'd just use cgexec :) [17:47] understood :) [17:47] so how is /exe failing? [17:48] Habbie it gives me nosense sometimes, sometimes the paths don't exist on the sytem or the paths include junk, let me give you ane xample [17:48] i can get results like this: "exec: process path=/bin/dashdevice for $.*$: usb:.*=$TAG.*$$/\1 \2/p" [17:48] or "/bin/dashhexchatlinux-gnu/glib-2.0/gio-launch-desktop" [17:49] are you sure that's /exe and not /cmdline ? [17:49] which isn't a path that even exists on my system! [17:49] yes 100% sure that's /exe [17:49] o_O [17:49] how do we replicate this? [17:49] cmdline just gives me "hexchat" [17:49] but the path gives me "/bin/dashhexchatlinux-gnu/glib-2.0/gio-launch-desktop" [17:49] that surprises me [17:49] how about /proc/self/maps? [17:51] or /proc/X/comm [17:51] never heard of those [17:51] sorry i'm new to linux from macos, where i implemented the same using proc_pidpath [17:51] i just want the equivalent [17:52] doesn't matter you haven't heard of them, you can try them :) [17:52] $ man -k proc_pidpath [17:52] proc_pidpath: nothing appropriate. [17:52] but i'm still confused that /exe does not work for you === juboxi is now known as jubo2 [17:52] where'd you get this proc_pidpath? [17:52] Habbie here's the code i'm using: https://gist.github.com/banister/63bf69ae3717bff0f01f8fbebc1f6c33 [17:53] sarnold it's hidden API on macos, but it exists [17:53] and it's public [17:53] banisterfiend, when this code fails for you, does ls -al /proc/PID/exe also give garbage? [17:54] Habbie let me try ,good point indeed [17:54] banisterfiend: there we go! :D [17:54] banisterfiend: found your bug, you forgot to nul-terminate the buffer [17:55] readlink() places the contents of the symbolic link pathname [17:55] in the buffer buf, which has size bufsiz. readlink() does [17:55] not append a null byte to buf. [17:55] ah! [17:55] i was just scanning for something like that [17:55] banisterfiend: probably char buf[256] = {0}; will do what you want [17:55] no stop [17:56] * sarnold stops [17:56] not 256 but the return value of readlink [17:56] or zero the whole thing before, of course [17:56] i thought sprintf null terminated itself? [17:56] Habbie: ah, yes, that's the zero-the-whole-thing approach [17:56] banisterfiend, your path is not coming out of sprintf, it's coming out of readlink [17:56] sarnold, oh, sorry, i misread you, yes, you do my second suggestion and that works [17:56] thanks [17:56] Habbie: I can see how what i said could be misread. It's scary. I'm glad you said something :D [17:57] i misread it as buf[256]=0 [17:57] which is indeed a NO SARNOLD STOP moment [17:57] then when i thought 'no wait that is beyond the allocated buffer' i reread [17:57] banisterfiend, sorry for me and sarnold confusing eachother - did you get something from this? [17:57] ah you guys are right [17:57] in teh man page [17:57] "readlink does not null terminate teh buffer" [17:57] i just assumed it would [17:57] yes [17:57] let me check now :) [17:58] i also assumed that but your failure really smelled like this [17:58] so i was just reading that when sarnold reported it [17:59] that's looking muich better now! [17:59] yay [17:59] yay! [17:59] good - it would really surprise me if /exe was garbage [17:59] same [17:59] and if it had what looked to me like a missing NUL terminator garbage .. potentially very scary :) [17:59] thanks, i should have read the docs for readlink first [18:00] i just assumed it null terminated [18:00] thanks again guys, looking good now :) [18:00] btw is tehre any other C API for doing this other than reading from /proc ? [18:00] or is /proc the official way? [18:00] jsut want: pid -> path [18:01] banisterfiend, /proc is the best interface linux has for these things [18:01] banisterfiend, there are libs out there that support many OSes [18:01] banisterfiend, and on linux, they use /proc [18:01] wonderful, thanks [18:01] Does linux have a kinfo_proc synonym? [18:02] ikanobori: what's that do? :) [18:02] https://www.freebsd.org/cgi/man.cgi?query=kinfo_getproc&sektion=3&apropos=0&manpath=FreeBSD%2010.0-RELEASE [18:02] Habbie do you think this approach is likely to be fast enough btw? i mean...will adding the pid to the cgroup happen before chrome starts creating sockets do you think? [18:02] It does what procfs does on Linux :) [18:02] unfortunately I only really know the APIs linux expose -- higher level apis that devbelopers would find enjoyable to use are almost entirely foreign to me [18:03] seems linux loves VFS for so many things, the entire cgroup API appears to be exposed through VFS too [18:04] banisterfiend, your question about a race condition is a very good question but i don't have an answer [18:04] banisterfiend, there's a reason i, with many words, said 'use cgexec' (i did not know it was called cgexec) [18:04] banisterfiend, i wonder if any of this can be done with file attributes or something like that === nullbyte_ is now known as sunzero [18:24] I just install mariadb-server, and I did not get the blue screen in terminal where you enter the root password etc. [18:24] What is the default root password for mariadb in 18.04 ubuntu [18:24] I need to get in so I can make user accounts and such [18:25]