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changing the process name works only partially in Linux #3037

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mmomtchev opened this issue Nov 5, 2020 · 1 comment
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changing the process name works only partially in Linux #3037

mmomtchev opened this issue Nov 5, 2020 · 1 comment

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@mmomtchev
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There are two "process titles" in Linux

  • one is the so-called command line that you see when you do ps uaxw, it comes from /proc/<pid>/cmdline and this one is still modified by process.title
  • the other one is the thread name that you see when you do ps -p <pid>, that one comes from /proc/<pid>/comm and it was broken by libuv 1.35.0 that was added in Node 12.17

#3019
nodejs/node#35503
@silverwind
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It's also wrong in /proc/pid/status, but I guess that may be a pointer to /proc/pid/comm.

$ cat /proc/28032/cmdline
myname
$ cat /proc/28032/comm
node
$ cat /proc/28032/status | head -1
Name: node

Some more info on this in https://stackoverflow.com/a/14176059/808699

santigimeno pushed a commit to santigimeno/libuv that referenced this issue Dec 3, 2020
@mmomtchev @santigimeno
linux,macos: fix uv_set_process_title regression
885f9c4 
The call to `uv__set_process_title()` had been accidentally removed.

Fixes: libuv#3037
PR-URL: libuv#3019
Refs: nodejs/node#35503
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
JeffroMF pushed a commit to JeffroMF/libuv that referenced this issue May 16, 2022
@mmomtchev @JeffroMF
linux,macos: fix uv_set_process_title regression
9d22cea 
The call to `uv__set_process_title()` had been accidentally removed.

Fixes: libuv#3037
PR-URL: libuv#3019
Refs: nodejs/node#35503
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
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@silverwind @mmomtchev