Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 177 deletions

diff --git a/src/core/killall.c b/src/core/killall.c
deleted file mode 100644
index 55200ffa48..0000000000
--- a/src/core/killall.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 ProFUSION embedded systems
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/wait.h>
-#include <signal.h>
-#include <errno.h>
-
-#include "util.h"
-#include "def.h"
-#include "killall.h"
-
-#define TIMEOUT_USEC (5 * USEC_PER_SEC)
-
-static bool ignore_proc(pid_t pid) {
-        char buf[PATH_MAX];
-        FILE *f;
-        char c;
-        size_t count;
-        uid_t uid;
-        int r;
-
-        /* We are PID 1, let's not commit suicide */
-        if (pid == 1)
-                return true;
-
-        r = get_process_uid(pid, &uid);
-        if (r < 0)
-                return true; /* not really, but better safe than sorry */
-
-        /* Non-root processes otherwise are always subject to be killed */
-        if (uid != 0)
-                return false;
-
-        snprintf(buf, sizeof(buf), "/proc/%lu/cmdline", (unsigned long) pid);
-        char_array_0(buf);
-
-        f = fopen(buf, "re");
-        if (!f)
-                return true; /* not really, but has the desired effect */
-
-        count = fread(&c, 1, 1, f);
-        fclose(f);
-
-        /* Kernel threads have an empty cmdline */
-        if (count <= 0)
-                return true;
-
-        /* Processes with argv[0][0] = '@' we ignore from the killing
-         * spree.
-         *
-         * http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons */
-        if (count == 1 && c == '@')
-                return true;
-
-        return false;
-}
-
-static void wait_for_children(int n_processes, sigset_t *mask) {
-        usec_t until;
-
-        assert(mask);
-
-        until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
-        for (;;) {
-                struct timespec ts;
-                int k;
-                usec_t n;
-
-                for (;;) {
-                        pid_t pid = waitpid(-1, NULL, WNOHANG);
-
-                        if (pid == 0)
-                                break;
-
-                        if (pid < 0 && errno == ECHILD)
-                                return;
-
-                        if (n_processes > 0)
-                                if (--n_processes == 0)
-                                        return;
-                }
-
-                n = now(CLOCK_MONOTONIC);
-                if (n >= until)
-                        return;
-
-                timespec_store(&ts, until - n);
-
-                if ((k = sigtimedwait(mask, NULL, &ts)) != SIGCHLD) {
-
-                        if (k < 0 && errno != EAGAIN) {
-                                log_error("sigtimedwait() failed: %m");
-                                return;
-                        }
-
-                        if (k >= 0)
-                                log_warning("sigtimedwait() returned unexpected signal.");
-                }
-        }
-}
-
-static int killall(int sig) {
-        DIR *dir;
-        struct dirent *d;
-        unsigned int n_processes = 0;
-
-        dir = opendir("/proc");
-        if (!dir)
-                return -errno;
-
-        while ((d = readdir(dir))) {
-                pid_t pid;
-
-                if (d->d_type != DT_DIR &&
-                    d->d_type != DT_UNKNOWN)
-                        continue;
-
-                if (parse_pid(d->d_name, &pid) < 0)
-                        continue;
-
-                if (ignore_proc(pid))
-                        continue;
-
-                if (kill(pid, sig) >= 0)
-                        n_processes++;
-                else if (errno != ENOENT)
-                        log_warning("Could not kill %d: %m", pid);
-        }
-
-        closedir(dir);
-
-        return n_processes;
-}
-
-void broadcast_signal(int sig, bool wait_for_exit) {
-        sigset_t mask, oldmask;
-        int n_processes;
-
-        assert_se(sigemptyset(&mask) == 0);
-        assert_se(sigaddset(&mask, SIGCHLD) == 0);
-        assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
-
-        if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
-                log_warning("kill(-1, SIGSTOP) failed: %m");
-
-        n_processes = killall(sig);
-
-        if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
-                log_warning("kill(-1, SIGCONT) failed: %m");
-
-        if (n_processes <= 0)
-                goto finish;
-
-        if (wait_for_exit)
-                wait_for_children(n_processes, &mask);
-
-finish:
-        sigprocmask(SIG_SETMASK, &oldmask, NULL);
-}