StackOverflow2013

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plurals

PO
primarykey
Id
18118203
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-08-08T04:58:44.750
FavoriteCount
0
LastActivityDate
2013-08-08T05:06:09.063
LastEditDate
2013-08-08T05:06:09.063
LastEditorUserId
841108
OwnerUserId
841108
ParentId
18112970
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
Every process can get its own pid with the <a href="http://man7.org/linux/man-pages/man2/getpid.2.html" rel="nofollow">getpid(2)</a> syscall. At process creation by <a href="http://man7.org/linux/man-pages/man2/fork.2.html" rel="nofollow">fork(2)</a> the parent process (e.g. some shell) gets the pid of the new child process. Read e.g. <a href="http://advancedlinuxprogramming.com/" rel="nofollow">Advanced Linux Programming</a> for more. And the kernel (not the program) is creating some subdirectory <code>/proc/1234/</code> see <a href="http://man7.org/linux/man-pages/man5/proc.5.html" rel="nofollow">proc(5)</a> as soon as it creates the process of pid 1234. Actually, <code>/proc/</code> is not a real file system. It is just a pseudo file system giving a view on the state of the kernel and the entire Linux system. Perl gives you its <a href="http://perldoc.perl.org/POSIX.html" rel="nofollow">POSIX</a> module to interface the syscalls. The <code>getpid()</code> syscall is interfaced using the <a href="http://perldoc.perl.org/perlvar.html#%24PID" rel="nofollow">$PID</a> or <code>$$</code> Perl variable. The <code>/proc/</code> pseudo filesystem is filled by the kernel. You could perhaps use <a href="http://en.wikipedia.org/wiki/Inotify" rel="nofollow">inotify</a> to follow change in <code>/proc/</code> but this is very probably a bad idea. Your question is not clear, we cannot understand what you really want to do and what you have tried.
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POGet PID of a process as it opens
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USBasile Starynkevitch
UserOwnerUserId
1. USBasile Starynkevitch
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PostLinksRelatedPostIdPostId
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