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/*-*- 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 <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/statvfs.h>
#include <fnmatch.h>
#include <systemd/sd-id128.h>
#include "util.h"
#include "condition-util.h"
#include "virt.h"
#include "path-util.h"
#include "fileio.h"
#include "unit.h"
#include "architecture.h"
Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
Condition *c;
assert(type < _CONDITION_TYPE_MAX);
c = new0(Condition, 1);
if (!c)
return NULL;
c->type = type;
c->trigger = trigger;
c->negate = negate;
if (parameter) {
c->parameter = strdup(parameter);
if (!c->parameter) {
free(c);
return NULL;
}
}
return c;
}
void condition_free(Condition *c) {
assert(c);
free(c->parameter);
free(c);
}
void condition_free_list(Condition *first) {
Condition *c, *n;
LIST_FOREACH_SAFE(conditions, c, n, first)
condition_free(c);
}
bool condition_test_kernel_command_line(Condition *c) {
char *line, *w, *state, *word = NULL;
bool equal;
int r;
size_t l, pl;
bool found = false;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_KERNEL_COMMAND_LINE);
r = proc_cmdline(&line);
if (r < 0)
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
if (r <= 0)
return c->negate;
equal = !!strchr(c->parameter, '=');
pl = strlen(c->parameter);
FOREACH_WORD_QUOTED(w, l, line, state) {
free(word);
word = strndup(w, l);
if (!word)
break;
if (equal) {
if (streq(word, c->parameter)) {
found = true;
break;
}
} else {
if (startswith(word, c->parameter) && (word[pl] == '=' || word[pl] == 0)) {
found = true;
break;
}
}
}
free(word);
free(line);
return found == !c->negate;
}
bool condition_test_virtualization(Condition *c) {
int b, v;
const char *id;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_VIRTUALIZATION);
v = detect_virtualization(&id);
if (v < 0) {
log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
return c->negate;
}
/* First, compare with yes/no */
b = parse_boolean(c->parameter);
if (v > 0 && b > 0)
return !c->negate;
if (v == 0 && b == 0)
return !c->negate;
/* Then, compare categorization */
if (v == VIRTUALIZATION_VM && streq(c->parameter, "vm"))
return !c->negate;
if (v == VIRTUALIZATION_CONTAINER && streq(c->parameter, "container"))
return !c->negate;
/* Finally compare id */
return (v > 0 && streq(c->parameter, id)) == !c->negate;
}
bool condition_test_architecture(Condition *c) {
Architecture a, b;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_ARCHITECTURE);
a = uname_architecture();
if (a < 0)
return c->negate;
if (streq(c->parameter, "native"))
b = native_architecture();
else
b = architecture_from_string(c->parameter);
if (b < 0)
return c->negate;
return (a == b) == !c->negate;
}
bool condition_test_host(Condition *c) {
_cleanup_free_ char *h = NULL;
sd_id128_t x, y;
int r;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_HOST);
if (sd_id128_from_string(c->parameter, &x) >= 0) {
r = sd_id128_get_machine(&y);
if (r < 0)
return c->negate;
return sd_id128_equal(x, y) == !c->negate;
}
h = gethostname_malloc();
if (!h)
return c->negate;
return (fnmatch(c->parameter, h, FNM_CASEFOLD) == 0) == !c->negate;
}
bool condition_test_ac_power(Condition *c) {
int r;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_AC_POWER);
r = parse_boolean(c->parameter);
if (r < 0)
return !c->negate;
return ((on_ac_power() != 0) == !!r) == !c->negate;
}
void condition_dump(Condition *c, FILE *f, const char *prefix) {
assert(c);
assert(f);
if (!prefix)
prefix = "";
fprintf(f,
"%s\t%s: %s%s%s %s\n",
prefix,
condition_type_to_string(c->type),
c->trigger ? "|" : "",
c->negate ? "!" : "",
c->parameter,
c->state < 0 ? "failed" : c->state > 0 ? "succeeded" : "untested");
}
void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
Condition *c;
LIST_FOREACH(conditions, c, first)
condition_dump(c, f, prefix);
}
static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
[CONDITION_PATH_EXISTS] = "ConditionPathExists",
[CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
[CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
[CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
[CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
[CONDITION_PATH_IS_READ_WRITE] = "ConditionPathIsReadWrite",
[CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
[CONDITION_FILE_NOT_EMPTY] = "ConditionFileNotEmpty",
[CONDITION_FILE_IS_EXECUTABLE] = "ConditionFileIsExecutable",
[CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
[CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
[CONDITION_SECURITY] = "ConditionSecurity",
[CONDITION_CAPABILITY] = "ConditionCapability",
[CONDITION_HOST] = "ConditionHost",
[CONDITION_AC_POWER] = "ConditionACPower",
[CONDITION_ARCHITECTURE] = "ConditionArchitecture",
[CONDITION_NULL] = "ConditionNull"
};
DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
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