Databases
StackOverflow2013
Postsdbo
POprobleme with the trace of Fork()
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POprobleme with the trace of Fork()
    primarykey
    data
    text
    <p>I have this example of fork() I need to do a trace!</p> <pre><code>#include &lt;unistd.h&gt; int main(void) { int i; for (i=0; i&lt;3; i++) if (fork()) wait(NULL); return 0; } </code></pre> <p>My solution for to do the trace is, something is wrong, I don't know how to do the trace:</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;sys/types.h&gt; #include &lt;unistd.h&gt; int main(void) { int i,pid; for(i=0;i&lt;3;i++) { pid=fork(); if(pid&gt;0) ///if is father (true) printf("PID After the fork child === %d &amp; father === %d (i = %d) \n\n",(int)getpid,(int)getppid,i); wait(NULL); printf(" After the wait child=== %d &amp; father=== %d (i = %d)|||\n",(int)getpid,(int)getppid,i); } } </code></pre> <p>This is what i get in the Terminal. I can see clearly that it is not correct, but i don't know how to resolve this problem:</p> <pre><code>PID After the fork child === 134513568 &amp; father === 134513632 (i = 0) After the wait child=== 134513568 &amp; father=== 134513632 (i = 0)||| PID After the fork child === 134513568 &amp; father === 134513632 (i = 1) After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 1)||| PID After the fork child === 134513568 &amp; father === 134513632 (i = 2) After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 0)||| PID After the fork child === 134513568 &amp; father === 134513632 (i = 1) After the wait child=== 134513568 &amp; father=== 134513632 (i = 1)||| PID After the fork child === 134513568 &amp; father === 134513632 (i = 2) After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 1)||| PID After the fork child === 134513568 &amp; father === 134513632 (i = 2) After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| After the wait child=== 134513568 &amp; father=== 134513632 (i = 2)||| </code></pre> <p>Thanks.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USVikas Goel
    1. UScleo
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POprobleme with the trace of Fork()
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POprobleme with the trace of Fork()
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload