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Full Discussion: Status of child job after parent is killed
Top Forums Programming Status of child job after parent is killed Post 302123785 by blowtorch on Wednesday 27th of June 2007 08:13:29 AM
Old 06-27-2007
I don't think that you can do that. The wait and waitpid functions only work on child processes. If you try to use waitpid on any process that is not a child of the current process, it will fail. A crude example:
Code:
# cat test.c
#include<unistd.h>
#include<stdio.h>

int main() {
        fprintf(stdout,"pid: %d\n",getpid());
        sleep(1000);
}
# cat test1.c
#include<stdio.h>
#include<sys/types.h>
#include<sys/wait.h>

int main() {
        int procid;
        fscanf(stdin,"%d",&procid);
        if((waitpid(procid,NULL,0))==-1) {
                perror("error in waitpid!!");
        }
}
# cc test.c -o test
# cc test1.c -o test1
# ./test &
[1] 5582
# pid: 5582

# ./test1
5582
error in waitpid!!: No child processes

 

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LEARN ABOUT OSF1

xmdropsitequerystackingorder

XmDropSiteQueryStackingOrder(3X)										  XmDropSiteQueryStackingOrder(3X)

NAME

       XmDropSiteQueryStackingOrder - A Drag and Drop function that returns the parent, a list of children, and the number of children for a spec-
       ified widget

SYNOPSIS

       #include <Xm/DragDrop.h>

       Status XmDropSiteQueryStackingOrder (widget, parent_return, child_returns, num_child_returns)
	       Widget widget;
	       Widget *parent_return;
	       Widget **child_returns;
	       Cardinal *num_child_returns;

DESCRIPTION

       XmDropSiteQueryStackingOrder obtains the parent, a list of children registered as drop sites, and the number of children registered as drop
       sites  for a given widget.  The children are listed in current stacking order, from bottom-most (first child) to the top-most (last child).
       This function allocates memory for the returned data that must be freed by calling XtFree.  Specifies the widget ID.  For this widget,  you
       obtain  the  list  of its children, its parent, and the number of children.  Returns the widget ID of the drop site parent of the specified
       widget.	Returns a pointer to the list of drop site children associated with the specified widget.  Returns the number of drop  site  chil-
       dren for the specified widget.

       For a complete definition of DropSite and its associated resources, see XmDropSite(3X).

RETURN VALUE

       Returns zero if the routine fails; returns a nonzero value if it succeeds.

SEE ALSO

       XmDropSite(3X), XmDropSiteConfigureStackingOrder(3X)

														  XmDropSiteQueryStackingOrder(3X)
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