Re: [Bug 214871] New: Man(3) system outdated

["Alejandro Colomar (man-pages)" <alx.manpages@gmail.com>]

Hi Adhemerval, Michael,

On 11/1/21 13:06, zatrazz wrote:
> Hi Alejandro,
> 
> Indeed we changed glibc to use posix_spawn on system and popen on  2.29 
> since
> to use posix_spawn (which uses clone (CLONE_VFORK | CLONE_VM)).  It plays
> way better with Linux memory subsystem than fork() + exec() specially 
> when such
> calls are used with process with large RSS.

I applied the following patch.  I'll close the bug.

Thanks,

Alex

---
     system.3: It doesn't call fork anymore

     Reported-by: Michael Kearney <mikekearney85@hotmail.com>
     Cc: Adhemerval Zanella <zatrazz@gmail.com>
     Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>

diff --git a/man3/system.3 b/man3/system.3
index 880fe93c6..bde45ed82 100644
--- a/man3/system.3
+++ b/man3/system.3
@@ -40,9 +40,9 @@ system \- execute a shell command
  .SH DESCRIPTION
  The
  .BR system ()
-library function uses
+library function behaves as if it used
  .BR fork (2)
-to create a child process that executes the shell command specified in
+to create a child process that executed the shell command specified in
  .I command
  using
  .BR execl (3)



-- 
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/