Re: [fpc-pascal] The keyboard unit
And looking a bit further, I see this has been kind of addressed in r39579:
https://svn.freepascal.org/cgi-bin/viewvc.cgi?view=revision=39579
The fix is imperfect - a process could have a ') ' in it, but it would
be unlikely. postfix and postgres appear to put a closing parens in
their argv[0] but always at the end.
So now I'm curious if a) working off fpc trunk is currently an OK idea
and b) if there are some good docs on doing that?
Kevin
On Sat, May 11, 2019 at 9:46 AM Kevin Lyda wrote:
>
> Ralf, thanks! That was the idea, a small easy to test program.
>
> [NOTE: this email was a log of me debugging. If you want to skip to
> the issue: it's because the keyboard unit dies when running under tmux
> because /proc/PID/stat is harder to parse than the keyboard unit code
> assumes.]
>
> My setup is similar but slightly different: Ubuntu 18.04 and just
> using a Makefile and the commandline compiler. Am I missing a flag?
> When I run these:
>
> strace -o argh ./test
> strace -o argh ./test-without-keyboard
>
> diff -u argh*
> --- argh2019-05-11 08:24:54.015836828 +0100
> +++ argh2 2019-05-11 08:25:21.377836828 +0100
> @@ -9,26 +9,6 @@
> ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
> ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
> readlink("/proc/self/exe", "/home/kevin/src/sandbox/older/fp"..., 255) = 45
> -getpid()= 2158
> -mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> -1, 0) = 0x7bcbfb894000
> -open("/proc/2158/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "2158 (test) R 2156 2156 14867 34"..., 256) = 256
> -close(3)= 0
> -open("/proc/2156/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "2156 (strace) S 14867 2156 14867"..., 256) = 256
> -close(3)= 0
> -mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> -1, 0) = 0x7bcbfb88c000
> -open("/proc/14867/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "14867 (zsh) S 522 14867 14867 34"..., 256) = 256
> -close(3)= 0
> -open("/proc/522/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "522 (tmux: server) S 131 522 522"..., 256) = 256
> -write(2, "Runtime error 106 at $00"..., 39) = 39
> -write(2, " $0042968D\n", 20) = 20
> -ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
> -write(2, " $0040018C\n", 20) = 20
> -write(2, "\n", 1) = 1
> -munmap(0x7bcbfb88c000, 32768) = 0
> -munmap(0x7bcbfb894000, 32768) = 0
> -exit_group(106) = ?
> -+++ exited with 106 +++
> +write(1, "Hello World.\n", 13) = 13
> +exit_group(0) = ?
> exited with 0 +++
>
> OK, so it seems to read through the ancestors of its process and dies
> when it reads the /proc/PID/stat of the tmux process. So, what if I
> run it without tmux: strace -o argh3 ./test which runs fine and exits
> cleanly. So what's the difference? diff -u argh{,3}
>
> --- argh2019-05-11 08:24:54.015836828 +0100
> +++ argh3 2019-05-11 08:40:16.456836828 +0100
> @@ -9,26 +9,31 @@
> ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
> ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
> readlink("/proc/self/exe", "/home/kevin/src/sandbox/older/fp"..., 255) = 45
> -getpid()= 2158
> -mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> -1, 0) = 0x7bcbfb894000
> -open("/proc/2158/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "2158 (test) R 2156 2156 14867 34"..., 256) = 256
> -close(3)= 0
> -open("/proc/2156/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "2156 (strace) S 14867 2156 14867"..., 256) = 256
> -close(3)= 0
> -mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> -1, 0) = 0x7bcbfb88c000
> -open("/proc/14867/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "14867 (zsh) S 522 14867 14867 34"..., 256) = 256
> -close(3)= 0
> -open("/proc/522/stat", O_RDONLY|O_LARGEFILE) = 3
> -read(3, "522 (tmux: server) S 131 522 522"..., 256) = 256
> -write(2, "Runtime error 106 at $00"..., 39) = 39
> -write(2, " $0042968D\n", 20) = 20
> -ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
> -write(2, " $0040018C\n", 20) = 20
> -write(2, "\n", 1) = 1
> -munmap(0x7bcbfb88c000, 32768) = 0
> -munmap(0x7bcbfb894000, 32768) = 0
> -exit_group(106) = ?
> -+++ exited with 106 +++
> +getpid()= 2719
> +mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> -1, 0) = 0x7f8092c23000
> +open("/proc/2719/stat", O_RDONLY|O_LARGEFILE) = 3
> +read(3, "2719 (test) R 2717 2717 2429 348"..., 256) = 256
> +close(3)= 0
> +open("/proc/2717/stat", O_RDONLY|O_LARGEFILE) = 3
>
Re: [fpc-pascal] The keyboard unit
Ralf, thanks! That was the idea, a small easy to test program.
[NOTE: this email was a log of me debugging. If you want to skip to
the issue: it's because the keyboard unit dies when running under tmux
because /proc/PID/stat is harder to parse than the keyboard unit code
assumes.]
My setup is similar but slightly different: Ubuntu 18.04 and just
using a Makefile and the commandline compiler. Am I missing a flag?
When I run these:
strace -o argh ./test
strace -o argh ./test-without-keyboard
diff -u argh*
--- argh2019-05-11 08:24:54.015836828 +0100
+++ argh2 2019-05-11 08:25:21.377836828 +0100
@@ -9,26 +9,6 @@
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
readlink("/proc/self/exe", "/home/kevin/src/sandbox/older/fp"..., 255) = 45
-getpid()= 2158
-mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7bcbfb894000
-open("/proc/2158/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "2158 (test) R 2156 2156 14867 34"..., 256) = 256
-close(3)= 0
-open("/proc/2156/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "2156 (strace) S 14867 2156 14867"..., 256) = 256
-close(3)= 0
-mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7bcbfb88c000
-open("/proc/14867/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "14867 (zsh) S 522 14867 14867 34"..., 256) = 256
-close(3)= 0
-open("/proc/522/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "522 (tmux: server) S 131 522 522"..., 256) = 256
-write(2, "Runtime error 106 at $00"..., 39) = 39
-write(2, " $0042968D\n", 20) = 20
-ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
-write(2, " $0040018C\n", 20) = 20
-write(2, "\n", 1) = 1
-munmap(0x7bcbfb88c000, 32768) = 0
-munmap(0x7bcbfb894000, 32768) = 0
-exit_group(106) = ?
-+++ exited with 106 +++
+write(1, "Hello World.\n", 13) = 13
+exit_group(0) = ?
exited with 0 +++
OK, so it seems to read through the ancestors of its process and dies
when it reads the /proc/PID/stat of the tmux process. So, what if I
run it without tmux: strace -o argh3 ./test which runs fine and exits
cleanly. So what's the difference? diff -u argh{,3}
--- argh2019-05-11 08:24:54.015836828 +0100
+++ argh3 2019-05-11 08:40:16.456836828 +0100
@@ -9,26 +9,31 @@
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
readlink("/proc/self/exe", "/home/kevin/src/sandbox/older/fp"..., 255) = 45
-getpid()= 2158
-mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7bcbfb894000
-open("/proc/2158/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "2158 (test) R 2156 2156 14867 34"..., 256) = 256
-close(3)= 0
-open("/proc/2156/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "2156 (strace) S 14867 2156 14867"..., 256) = 256
-close(3)= 0
-mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7bcbfb88c000
-open("/proc/14867/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "14867 (zsh) S 522 14867 14867 34"..., 256) = 256
-close(3)= 0
-open("/proc/522/stat", O_RDONLY|O_LARGEFILE) = 3
-read(3, "522 (tmux: server) S 131 522 522"..., 256) = 256
-write(2, "Runtime error 106 at $00"..., 39) = 39
-write(2, " $0042968D\n", 20) = 20
-ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0
-write(2, " $0040018C\n", 20) = 20
-write(2, "\n", 1) = 1
-munmap(0x7bcbfb88c000, 32768) = 0
-munmap(0x7bcbfb894000, 32768) = 0
-exit_group(106) = ?
-+++ exited with 106 +++
+getpid()= 2719
+mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7f8092c23000
+open("/proc/2719/stat", O_RDONLY|O_LARGEFILE) = 3
+read(3, "2719 (test) R 2717 2717 2429 348"..., 256) = 256
+close(3)= 0
+open("/proc/2717/stat", O_RDONLY|O_LARGEFILE) = 3
+read(3, "2717 (strace) S 2429 2717 2429 3"..., 256) = 256
+close(3)= 0
+open("/proc/2429/stat", O_RDONLY|O_LARGEFILE) = 3
+read(3, "2429 (zsh) S 2427 2429 2429 3481"..., 256) = 256
+close(3)= 0
+open("/proc/2427/stat", O_RDONLY|O_LARGEFILE) = 3
+read(3, "2427 (ld-linux-x86-64) S 364 242"..., 256) = 256
+close(3)= 0
+open("/etc/timezone", O_RDONLY|O_LARGEFILE) = 3
+read(3, "Etc/UTC\n", 255) = 8
+close(3)= 0
+open("/usr/share/zoneinfo/Etc/UTC", O_RDONLY|O_LARGEFILE) = 3
+read(3,
Re: [fpc-pascal] The keyboard unit
On 5/10/2019 4:42 PM, Kevin Lyda wrote: If I remove the uses clause it runs fine. Why is the keyboard unit, which isn't even being used, causing this error? Kevin Well, when I got home a short while ago, I tried that small test program on one of my Linux workstations and it runs just fine... FPC 3.04 as installed with Lazarus 2.02 (ok, installed the 3 .deb packages for fpc, fpc-source and lazarus 2.02 from the lazarus SourceForge repo), compiled and running on Linux Mint 19.2/64, tried both Cinnamon and Mate, on two different hosts... Ralf --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] The keyboard unit
if it's not being used, remove it :)but really though, do any of the fleshed out examples on the website work? like the one from here?:https://www.freepascal.org/docs-html/rtl/keyboard/getkeyevent.html--Alexander Grotewohlhttp://dcclost.com___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] The keyboard unit
On 5/10/2019 4:42 PM, Kevin Lyda wrote: When I compile and run this small test program ( https://gist.github.com/lyda/2d33a6d91067e9dffb4ed37147b52583 ) the following happens: % fpc test.pas Free Pascal Compiler version 3.0.4+dfsg-22~bpo9+2 [2019/02/22] for x86_64 Copyright (c) 1993-2017 by Florian Klaempfl and others Target OS: Linux for x86-64 Compiling test.pas Linking test /usr/bin/ld.bfd: warning: link.res contains output sections; did you forget -T? 7 lines compiled, 0.1 sec % ./test Runtime error 106 at $0042968D $0042968D $0040018C If I remove the uses clause it runs fine. Why is the keyboard unit, which isn't even being used, causing this error? Kevin Away from any computer with FreePascal installed, but could it be that this is a non-Linux aware unit which does something DOS-specific (as you select TP mode), which of course doesn't work under Linux... Ralf --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] The keyboard unit
When I compile and run this small test program ( https://gist.github.com/lyda/2d33a6d91067e9dffb4ed37147b52583 ) the following happens: % fpc test.pas Free Pascal Compiler version 3.0.4+dfsg-22~bpo9+2 [2019/02/22] for x86_64 Copyright (c) 1993-2017 by Florian Klaempfl and others Target OS: Linux for x86-64 Compiling test.pas Linking test /usr/bin/ld.bfd: warning: link.res contains output sections; did you forget -T? 7 lines compiled, 0.1 sec % ./test Runtime error 106 at $0042968D $0042968D $0040018C If I remove the uses clause it runs fine. Why is the keyboard unit, which isn't even being used, causing this error? Kevin -- Kevin Lyda Galway, Ireland ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
