Re: [OT] 'volatile' in userspace

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




So this would tend to confirm the rule of thumb: use of "volatile" in
a userspace progam tends to indicate a bug.

                                                - Ted

No. vfork(), setjmp(), signal().

Yes, I use vfork. So far, the only way I have found for the parent to
know whether or not the child's exec() failed is this way:

volatile int failed;
pid_t pid;

failed = 0;
if (0 == (pid = vfork())) {
  execve(argv[0], argv, envp);
  failed = errno;
  _exit(0);
}
if (pid < 0) {
  /* can't fork */
}
if (failed) {
  /* wait for pid (clean up zombie) */
  errno = failed;
  /* can't exec: update state */
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux