shaba/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2024-12-23 21:35:11 +03:00
Code

util: detect systemd-nspawn without relying on ns cgroup tree

Browse Source
This commit is contained in:
Lennart Poettering 2011-09-23 04:38:39 +02:00
parent 3bb1c6b04f
commit 65bc2c2114
3 changed files with 62 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
man/systemd.unit.xml
View File

@ -746,18 +746,22 @@
whether it is a specific
implementation. Takes either boolean
value to check if being executed in
any virtual environment or one of the
any virtual environment or one of
<varname>qemu</varname>,
<varname>kvm</varname>,
<varname>vmware</varname>,
<varname>microsoft</varname>,
<varname>oracle</varname>,
<varname>xen</varname>,
<varname>pidns</varname>,
<varname>openvz</varname> to test
against a specific implementation. The
test may be negated by prepending an
exclamation mark.
<varname>openvz</varname>,
<varname>lxc</varname>,
<varname>systemd-nspawn</varname>,
<varname>pidns</varname> to test
against a specific implementation. If
multiple virtualization technologies
are nested only the innermost is
considered. The test may be negated by
prepending an exclamation mark.
<varname>ConditionSecurity=</varname>
may be used to check whether the given
security module is enabled on the
@ -788,7 +792,8 @@
pipe symbol must be passed first, the
exclamation second. Except for
<varname>ConditionPathIsSymbolicLink=</varname>,
all path checks follow symlinks.</para></listitem>
all path checks follow
symlinks.</para></listitem>
</varlistentry>
<varlistentry>

3
src/detect-virt.c
View File

@ -34,7 +34,8 @@ int main(int argc, char *argv[]) {
* to detect whether we are being run in a virtualized
* environment or not */
if ((r = detect_virtualization(&id)) < 0) {
r = detect_virtualization(&id);
if (r < 0) {
log_error("Failed to check for virtualization: %s", strerror(-r));
return EXIT_FAILURE;
}

51
src/util.c
View File

@ -4384,7 +4384,7 @@ int detect_vm(const char **id) {
if (hypervisor) {
if (id)
*id = "other";
*id = "other-vm";
return 1;
}
@ -4421,7 +4421,51 @@ int detect_container(const char **id) {
return 1;
}
if ((f = fopen("/proc/self/cgroup", "re"))) {
f = fopen("/proc/1/environ", "re");
if (f) {
bool done = false;
do {
char line[LINE_MAX];
unsigned i;
for (i = 0; i < sizeof(line)-1; i++) {
int c;
c = getc(f);
if (_unlikely_(c == EOF)) {
done = true;
break;
} else if (c == 0)
break;
line[i] = c;
}
line[i] = 0;
if (streq(line, "container=lxc")) {
fclose(f);
*id = "lxc";
return 1;
} else if (streq(line, "container=systemd-nspawn")) {
fclose(f);
*id = "systemd-nspawn";
return 1;
} else if (startswith(line, "container=")) {
fclose(f);
*id = "other-container";
return 1;
}
} while (!done);
fclose(f);
}
f = fopen("/proc/self/cgroup", "re");
if (f) {
for (;;) {
char line[LINE_MAX], *p;
@ -4429,7 +4473,8 @@ int detect_container(const char **id) {
if (!fgets(line, sizeof(line), f))
break;
if (!(p = strchr(strstrip(line), ':')))
p = strchr(strstrip(line), ':');
if (!p)
continue;
if (strncmp(p, ":ns:", 4))