2014-02-20 19:26:54 +01:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/statvfs.h>
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#include <fnmatch.h>
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#include <systemd/sd-id128.h>
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#include "util.h"
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#include "condition-util.h"
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#include "virt.h"
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#include "path-util.h"
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#include "fileio.h"
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#include "unit.h"
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2014-02-21 02:06:04 +01:00
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#include "architecture.h"
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2014-02-20 19:26:54 +01:00
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Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
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Condition *c;
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assert(type < _CONDITION_TYPE_MAX);
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c = new0(Condition, 1);
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if (!c)
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return NULL;
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c->type = type;
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c->trigger = trigger;
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c->negate = negate;
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if (parameter) {
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c->parameter = strdup(parameter);
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if (!c->parameter) {
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free(c);
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return NULL;
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}
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}
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return c;
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}
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void condition_free(Condition *c) {
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assert(c);
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free(c->parameter);
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free(c);
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}
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void condition_free_list(Condition *first) {
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Condition *c, *n;
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LIST_FOREACH_SAFE(conditions, c, n, first)
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condition_free(c);
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}
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bool condition_test_kernel_command_line(Condition *c) {
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char *line, *w, *state, *word = NULL;
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bool equal;
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int r;
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size_t l, pl;
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bool found = false;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_KERNEL_COMMAND_LINE);
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r = proc_cmdline(&line);
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if (r < 0)
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log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
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if (r <= 0)
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return c->negate;
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equal = !!strchr(c->parameter, '=');
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pl = strlen(c->parameter);
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FOREACH_WORD_QUOTED(w, l, line, state) {
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free(word);
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word = strndup(w, l);
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if (!word)
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break;
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if (equal) {
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if (streq(word, c->parameter)) {
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found = true;
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break;
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}
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} else {
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if (startswith(word, c->parameter) && (word[pl] == '=' || word[pl] == 0)) {
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found = true;
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break;
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}
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}
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}
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free(word);
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free(line);
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return found == !c->negate;
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}
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bool condition_test_virtualization(Condition *c) {
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int b;
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Virtualization v;
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const char *id;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_VIRTUALIZATION);
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v = detect_virtualization(&id);
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if (v < 0) {
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log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
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return c->negate;
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}
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/* First, compare with yes/no */
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b = parse_boolean(c->parameter);
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if (v > 0 && b > 0)
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return !c->negate;
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if (v == 0 && b == 0)
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return !c->negate;
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/* Then, compare categorization */
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if (v == VIRTUALIZATION_VM && streq(c->parameter, "vm"))
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return !c->negate;
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if (v == VIRTUALIZATION_CONTAINER && streq(c->parameter, "container"))
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return !c->negate;
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/* Finally compare id */
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return (v > 0 && streq(c->parameter, id)) == !c->negate;
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}
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2014-02-21 02:06:04 +01:00
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bool condition_test_architecture(Condition *c) {
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Architecture a, b;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_ARCHITECTURE);
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a = uname_architecture();
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if (a < 0)
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return c->negate;
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if (streq(c->parameter, "native"))
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b = native_architecture();
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else
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b = architecture_from_string(c->parameter);
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if (b < 0)
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return c->negate;
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return (a == b) == !c->negate;
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}
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2014-02-20 19:26:54 +01:00
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bool condition_test_host(Condition *c) {
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sd_id128_t x, y;
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char *h;
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int r;
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bool b;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_HOST);
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if (sd_id128_from_string(c->parameter, &x) >= 0) {
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r = sd_id128_get_machine(&y);
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if (r < 0)
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return c->negate;
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2014-02-21 02:06:04 +01:00
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return sd_id128_equal(x, y) == !c->negate;
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2014-02-20 19:26:54 +01:00
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}
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h = gethostname_malloc();
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if (!h)
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return c->negate;
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b = fnmatch(c->parameter, h, FNM_CASEFOLD) == 0;
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free(h);
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return b == !c->negate;
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}
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bool condition_test_ac_power(Condition *c) {
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int r;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_AC_POWER);
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r = parse_boolean(c->parameter);
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if (r < 0)
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return !c->negate;
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return ((on_ac_power() != 0) == !!r) == !c->negate;
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}
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void condition_dump(Condition *c, FILE *f, const char *prefix) {
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assert(c);
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assert(f);
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if (!prefix)
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prefix = "";
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fprintf(f,
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"%s\t%s: %s%s%s %s\n",
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prefix,
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condition_type_to_string(c->type),
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c->trigger ? "|" : "",
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c->negate ? "!" : "",
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c->parameter,
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c->state < 0 ? "failed" : c->state > 0 ? "succeeded" : "untested");
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}
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void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
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Condition *c;
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LIST_FOREACH(conditions, c, first)
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condition_dump(c, f, prefix);
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}
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static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
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[CONDITION_PATH_EXISTS] = "ConditionPathExists",
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[CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
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[CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
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[CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
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[CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
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[CONDITION_PATH_IS_READ_WRITE] = "ConditionPathIsReadWrite",
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[CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
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[CONDITION_FILE_NOT_EMPTY] = "ConditionFileNotEmpty",
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[CONDITION_FILE_IS_EXECUTABLE] = "ConditionFileIsExecutable",
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[CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
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[CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
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[CONDITION_SECURITY] = "ConditionSecurity",
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[CONDITION_CAPABILITY] = "ConditionCapability",
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[CONDITION_HOST] = "ConditionHost",
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[CONDITION_AC_POWER] = "ConditionACPower",
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[CONDITION_ARCHITECTURE] = "ConditionArchitecture",
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[CONDITION_NULL] = "ConditionNull"
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};
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DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
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