Defect in XSH system()

[yyyyyy@xxxxxxxxxxx]

        Defect report from : Martin v. Löwis , HPI

(Please direct followup comments direct to yyyyyyyyyyyyyy@xxxxxxxxxxxxx)

@ page 0 line 0 section system() comment {0}

Problem:

Edition of Specification (Year): 2003

Defect code :  3. Clarification required

It is unclear whether calling system(3) invokes atfork handlers in a conforming 
implementation. system(3) specifies

"The environment of the executed command shall be as if a child process were 
created using fork(), and the child process invoked the sh utility using 
execl() as follows:"

In particular, usage of the word "environment" is confusing here. It may refer 
just to environment variables, however, the "Application usage" sections 
indicates that also signal handlers should be arranged as if the  process was 
created through fork() and execl(). This still makes not clear whether handlers 
installed through pthread_atfork() are invoked.

Action:

The description of system() should change to

 "system() behaves as if a new process was created using fork(),
  and the child process invoked the sh utility using execl() ..."

In addition, the application usage section should make it clear that atfork 
handlers are invoked.