[BusyBox] new version xargs

[Vladimir N. Oleynik]

Glenn,

> > I tried full rewrote xargs applet.
> > Previous Mark Whitley version have many problems:
> > 1. Full broken if geting lines have spaces or shell metachars
> > 2. Eating empty lines as default (but this true with -r option only).
> > 3. Do not show problem if command can`t executing
> > 4. Do not detect unsuported options
> >
> > New version have also:
> > 1. Support -prt options
> > 2. Use vfork (special algorithm)
> > 3. Reduce memory allocate
> >
> 
> Applied
> 
> Thanks

Thanks!
I think, idea from my xargs_exec may be true algorith for use for
new run_part() libbb function. No MMU mashines can use vfork but
can`t use fork().


        int pid;
+	int common[4];	/* common vfork stack */

+	common[0] = 0;
-        if ((pid = fork()) < 0) {
+        if ((pid = vfork()) < 0) {
             perror_msg_and_die("failed to vfork");
        } else if (!pid) {
              execv(args[0], args);
+	      common[0]=errno;
+	      _exit(1);
-              perror_msg_and_die("failed to exec %s", args[0]);
        }
+	if(common[0]) {
+		errno = common[0];
+       	perror_msg_and_die("failed to exec %s", args[0]);
+	}
        waitpid(pid, &result, 0);




--w
vodz