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, 224 deletions

diff --git a/src/shared/capability.c b/src/shared/capability.c
deleted file mode 100644
index 9b743e86d0..0000000000
--- a/src/shared/capability.c
+++ /dev/null
@@ -1,224 +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 <assert.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <sys/capability.h>
-#include <sys/prctl.h>
-
-#include "macro.h"
-#include "capability.h"
-#include "util.h"
-#include "log.h"
-
-int have_effective_cap(int value) {
-        cap_t cap;
-        cap_flag_value_t fv;
-        int r;
-
-        cap = cap_get_proc();
-        if (!cap)
-                return -errno;
-
-        if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
-                r = -errno;
-        else
-                r = fv == CAP_SET;
-
-        cap_free(cap);
-        return r;
-}
-
-unsigned long cap_last_cap(void) {
-        static __thread unsigned long saved;
-        static __thread bool valid = false;
-        unsigned long p;
-
-        if (valid)
-                return saved;
-
-        p = (unsigned long) CAP_LAST_CAP;
-
-        if (prctl(PR_CAPBSET_READ, p) < 0) {
-
-                /* Hmm, look downwards, until we find one that
-                 * works */
-                for (p--; p > 0; p --)
-                        if (prctl(PR_CAPBSET_READ, p) >= 0)
-                                break;
-
-        } else {
-
-                /* Hmm, look upwards, until we find one that doesn't
-                 * work */
-                for (;; p++)
-                        if (prctl(PR_CAPBSET_READ, p+1) < 0)
-                                break;
-        }
-
-        saved = p;
-        valid = true;
-
-        return p;
-}
-
-int capability_bounding_set_drop(uint64_t drop, bool right_now) {
-        unsigned long i;
-        cap_t after_cap = NULL, temp_cap = NULL;
-        cap_flag_value_t fv;
-        int r;
-
-        /* If we are run as PID 1 we will lack CAP_SETPCAP by default
-         * in the effective set (yes, the kernel drops that when
-         * executing init!), so get it back temporarily so that we can
-         * call PR_CAPBSET_DROP. */
-
-        after_cap = cap_get_proc();
-        if (!after_cap)
-                return -errno;
-
-        if (cap_get_flag(after_cap, CAP_SETPCAP, CAP_EFFECTIVE, &fv) < 0) {
-                cap_free(after_cap);
-                return -errno;
-        }
-
-        if (fv != CAP_SET) {
-                static const cap_value_t v = CAP_SETPCAP;
-
-                temp_cap = cap_dup(after_cap);
-                if (!temp_cap) {
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (cap_set_flag(temp_cap, CAP_EFFECTIVE, 1, &v, CAP_SET) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (cap_set_proc(temp_cap) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-        }
-
-        for (i = 0; i <= cap_last_cap(); i++) {
-
-                if (drop & ((uint64_t) 1ULL << (uint64_t) i)) {
-                        cap_value_t v;
-
-                        /* Drop it from the bounding set */
-                        if (prctl(PR_CAPBSET_DROP, i) < 0) {
-                                r = -errno;
-                                goto finish;
-                        }
-                        v = i;
-
-                        /* Also drop it from the inheritable set, so
-                         * that anything we exec() loses the
-                         * capability for good. */
-                        if (cap_set_flag(after_cap, CAP_INHERITABLE, 1, &v, CAP_CLEAR) < 0) {
-                                r = -errno;
-                                goto finish;
-                        }
-
-                        /* If we shall apply this right now drop it
-                         * also from our own capability sets. */
-                        if (right_now) {
-                                if (cap_set_flag(after_cap, CAP_PERMITTED, 1, &v, CAP_CLEAR) < 0 ||
-                                    cap_set_flag(after_cap, CAP_EFFECTIVE, 1, &v, CAP_CLEAR) < 0) {
-                                        r = -errno;
-                                        goto finish;
-                                }
-                        }
-                }
-        }
-
-        r = 0;
-
-finish:
-        if (temp_cap)
-                cap_free(temp_cap);
-
-        if (after_cap) {
-                cap_set_proc(after_cap);
-                cap_free(after_cap);
-        }
-
-        return r;
-}
-
-static int drop_from_file(const char *fn, uint64_t drop) {
-        int r, k;
-        uint32_t hi, lo;
-        uint64_t current, after;
-        char *p;
-
-        r = read_one_line_file(fn, &p);
-        if (r < 0)
-                return r;
-
-        assert_cc(sizeof(hi) == sizeof(unsigned));
-        assert_cc(sizeof(lo) == sizeof(unsigned));
-
-        k = sscanf(p, "%u %u", &lo, &hi);
-        free(p);
-
-        if (k != 2)
-                return -EIO;
-
-        current = (uint64_t) lo | ((uint64_t) hi << 32ULL);
-        after = current & ~drop;
-
-        if (current == after)
-                return 0;
-
-        lo = (unsigned) (after & 0xFFFFFFFFULL);
-        hi = (unsigned) ((after >> 32ULL) & 0xFFFFFFFFULL);
-
-        if (asprintf(&p, "%u %u", lo, hi) < 0)
-                return -ENOMEM;
-
-        r = write_one_line_file(fn, p);
-        free(p);
-
-        return r;
-}
-
-int capability_bounding_set_drop_usermode(uint64_t drop) {
-        int r;
-
-        r = drop_from_file("/proc/sys/kernel/usermodehelper/inheritable", drop);
-        if (r < 0)
-                return r;
-
-        r = drop_from_file("/proc/sys/kernel/usermodehelper/bset", drop);
-        if (r < 0)
-                return r;
-
-        return r;
-}