One parent, multiple children pipe with fork() Post: 303017920

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Hi friends, I have a small question regarding unix system call fork, I hope you will solve my problem. Here is the small program $ cat fork1.c #include <stdio.h> #include <unistd.h> #include <sys/types.h> int main() { int pid; int x = 0; x = x + 1; pid = fork(); if(pid < 0) {...

LEARN ABOUT X11R4

xquerytree

XQueryTree(3)							  XLIB FUNCTIONS						     XQueryTree(3)

NAME

       XQueryTree - query window tree information

SYNTAX

       Status XQueryTree(Display *display, Window w, Window *root_return, Window *parent_return, Window **children_return, unsigned int *nchil-
	      dren_return);

ARGUMENTS

       children_return
		 Returns the list of children.

       display	 Specifies the connection to the X server.

       nchildren_return
		 Returns the number of children.

       parent_return
		 Returns the parent window.

       root_return
		 Returns the root window.

       w	 Specifies the window whose list of children, root, parent, and number of children you want to obtain.

DESCRIPTION

       The XQueryTree function returns the root ID, the parent window ID, a pointer to the list of children windows (NULL when there are no chil-
       dren), and the number of children in the list for the specified window.	The children are listed in current stacking order, from bottom-
       most (first) to top-most (last).  XQueryTree returns zero if it fails and nonzero if it succeeds.  To free a non-NULL children list when it
       is no longer needed, use XFree.

BUGS

       This really should return a screen *, not a root window ID.

SEE ALSO

       XFree(3X11), XGetWindowAttributes(3X11), XQueryPointer(3X11)
       Xlib - C Language X Interface

X Version 11							   libX11 1.2.1 						     XQueryTree(3)

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