Cygwin: fix child getting another pid after spawnve
When calling spawnve, in contrast to execve, the parent has to create the pid for the child. With the old technique this was simply the Windows pid, but now we have to inform the child about its new pid. Add a cygpid member to class child_info_spawn. Set it in child_info_spawn::worker, just prior to calling CreateProcess rather than afterwards. Overwrite cygheap->pid in child_info_spawn::handle_spawn before calling pinfo::thisproc. Make sure pinfo::thisproc knows the pid is already set by setting the handle argument to INVALID_HANDLE_VALUE. Also set procinfo->dwProcessId to myself_initial.dwProcessId instead of to myself_initial.pid for clarity. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
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@@ -258,7 +258,6 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
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int in__stdin, int in__stdout)
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{
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bool rc;
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pid_t cygpid;
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int res = -1;
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/* Check if we have been called from exec{lv}p or spawn{lv}p and mask
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@@ -578,6 +577,8 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
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if (!real_path.iscygexec () && mode == _P_OVERLAY)
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myself->process_state |= PID_NOTCYGWIN;
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cygpid = (mode != _P_OVERLAY) ? create_cygwin_pid () : myself->pid;
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wchar_t wcmd[(size_t) cmd];
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if (!::cygheap->user.issetuid ()
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|| (::cygheap->user.saved_uid == ::cygheap->user.real_uid
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@@ -708,11 +709,6 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
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if (::cygheap->fdtab.need_fixup_before ())
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::cygheap->fdtab.fixup_before_exec (pi.dwProcessId);
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if (mode != _P_OVERLAY)
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cygpid = create_cygwin_pid ();
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else
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cygpid = myself->pid;
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/* Print the original program name here so the user can see that too. */
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syscall_printf ("pid %d, prog_arg %s, cmd line %.9500s)",
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rc ? cygpid : (unsigned int) -1, prog_arg, (const char *) cmd);
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