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, 143 deletions

diff --git a/src/shared/pager.c b/src/shared/pager.c
deleted file mode 100644
index 488a12c763..0000000000
--- a/src/shared/pager.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  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/types.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/prctl.h>
-
-#include "pager.h"
-#include "util.h"
-#include "macro.h"
-
-static pid_t pager_pid = 0;
-
-_noreturn_ static void pager_fallback(void) {
-        ssize_t n;
-        do {
-                n = splice(STDIN_FILENO, NULL, STDOUT_FILENO, NULL, 64*1024, 0);
-        } while (n > 0);
-        if (n < 0) {
-                log_error("Internal pager failed: %m");
-                _exit(EXIT_FAILURE);
-        }
-        _exit(EXIT_SUCCESS);
-}
-
-int pager_open(void) {
-        int fd[2];
-        const char *pager;
-        pid_t parent_pid;
-        int r;
-
-        if (pager_pid > 0)
-                return 1;
-
-        if ((pager = getenv("SYSTEMD_PAGER")) || (pager = getenv("PAGER")))
-                if (!*pager || streq(pager, "cat"))
-                        return 0;
-
-        if (!on_tty())
-                return 0;
-
-        /* Determine and cache number of columns before we spawn the
-         * pager so that we get the value from the actual tty */
-        columns();
-
-        if (pipe(fd) < 0) {
-                log_error("Failed to create pager pipe: %m");
-                return -errno;
-        }
-
-        parent_pid = getpid();
-
-        pager_pid = fork();
-        if (pager_pid < 0) {
-                r = -errno;
-                log_error("Failed to fork pager: %m");
-                close_pipe(fd);
-                return r;
-        }
-
-        /* In the child start the pager */
-        if (pager_pid == 0) {
-
-                dup2(fd[0], STDIN_FILENO);
-                close_pipe(fd);
-
-                setenv("LESS", "FRSX", 0);
-
-                /* Make sure the pager goes away when the parent dies */
-                if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
-                        _exit(EXIT_FAILURE);
-
-                /* Check whether our parent died before we were able
-                 * to set the death signal */
-                if (getppid() != parent_pid)
-                        _exit(EXIT_SUCCESS);
-
-                if (pager) {
-                        execlp(pager, pager, NULL);
-                        execl("/bin/sh", "sh", "-c", pager, NULL);
-                }
-
-                /* Debian's alternatives command for pagers is
-                 * called 'pager'. Note that we do not call
-                 * sensible-pagers here, since that is just a
-                 * shell script that implements a logic that
-                 * is similar to this one anyway, but is
-                 * Debian-specific. */
-                execlp("pager", "pager", NULL);
-
-                execlp("less", "less", NULL);
-                execlp("more", "more", NULL);
-
-                pager_fallback();
-                /* not reached */
-        }
-
-        /* Return in the parent */
-        if (dup2(fd[1], STDOUT_FILENO) < 0) {
-                log_error("Failed to duplicate pager pipe: %m");
-                return -errno;
-        }
-
-        close_pipe(fd);
-        return 1;
-}
-
-void pager_close(void) {
-
-        if (pager_pid <= 0)
-                return;
-
-        /* Inform pager that we are done */
-        fclose(stdout);
-        kill(pager_pid, SIGCONT);
-        wait_for_terminate(pager_pid, NULL);
-        pager_pid = 0;
-}
-
-bool pager_have(void) {
-        return pager_pid > 0;
-}