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systemctl: require correctly formed unit names when enabling units

This commit is contained in:
Lennart Poettering 2010-10-06 02:33:40 +02:00
parent 647f1fafb5
commit 71fad67514
7 changed files with 55 additions and 58 deletions
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3
Makefile.am
View File

@ -700,7 +700,8 @@ systemctl_SOURCES = \
src/sd-daemon.c \
src/cgroup-show.c \
src/cgroup-util.c \
src/exit-status.c
src/exit-status.c \
src/unit-name.c
systemctl_CFLAGS = \
$(AM_CFLAGS) \

9
fixme
View File

@ -4,9 +4,6 @@ v11:
* verify ordering of random-seed-load and base.target!
* systemctl enable /lib/systemd/system/?*.service
creates wrong subdirs in /etc/ssytemd/system/ which prevent further bootup
later:
* do not throw error when .service file is linked to /dev/null
@ -97,8 +94,6 @@ later:
* document locale.conf, vconsole.conf and possibly the tempfiles.d and modules-load.d mechanism.
* when /proc/self/mountinfo is not parsable, proceed with next line
* beefed up tmpwatch that reads tmpfiles.d
* /lib/systemd/system/systemd-readahead-replay.service
@ -109,6 +104,10 @@ later:
* Restart=on-failure and Restart=on-abort
* kill sessions on shutdown
* when processes remain in a service even though the start command failed enter active
External:
* place /etc/inittab with explaining blurb.

38
src/systemctl.c
View File

@ -53,6 +53,7 @@
#include "exit-status.h"
#include "bus-errors.h"
#include "build.h"
#include "unit-name.h"
static const char *arg_type = NULL;
static char **arg_property = NULL;
@ -3237,28 +3238,16 @@ static void install_info_hashmap_free(Hashmap *m) {
hashmap_free(m);
}
static bool unit_name_valid(const char *name) {
/* This is a minimal version of unit_name_valid() from
* unit-name.c */
if (!*name)
return false;
if (ignore_file(name))
return false;
return true;
}
static int install_info_add(const char *name) {
InstallInfo *i;
int r;
assert(will_install);
if (!unit_name_valid(name))
if (!unit_name_is_valid_no_type(name)) {
log_warning("Unit name %s is not a valid unit name.", name);
return -EINVAL;
}
if (hashmap_get(have_installed, name) ||
hashmap_get(will_install, name))
@ -3310,11 +3299,13 @@ static int config_parse_also(
if (!(n = strndup(w, l)))
return -ENOMEM;
r = install_info_add(n);
free(n);
if (r < 0)
if ((r = install_info_add(n)) < 0) {
log_warning("Cannot install unit %s: %s", n, strerror(-r));
free(n);
return r;
}
free(n);
}
return 0;
@ -3639,7 +3630,7 @@ static int install_info_symlink_alias(const char *verb, InstallInfo *i, const ch
STRV_FOREACH(s, i->aliases) {
if (!unit_name_valid(*s)) {
if (!unit_name_is_valid_no_type(*s)) {
log_error("Invalid name %s.", *s);
r = -EINVAL;
goto finish;
@ -3658,7 +3649,6 @@ static int install_info_symlink_alias(const char *verb, InstallInfo *i, const ch
if (streq(verb, "disable"))
rmdir_parents(alias_path, config_path);
}
r = 0;
finish:
@ -3677,7 +3667,7 @@ static int install_info_symlink_wants(const char *verb, InstallInfo *i, const ch
assert(config_path);
STRV_FOREACH(s, i->wanted_by) {
if (!unit_name_valid(*s)) {
if (!unit_name_is_valid_no_type(*s)) {
log_error("Invalid name %s.", *s);
r = -EINVAL;
goto finish;
@ -3840,8 +3830,10 @@ static int enable_unit(DBusConnection *bus, char **args, unsigned n) {
}
for (j = 1; j < n; j++)
if ((r = install_info_add(args[j])) < 0)
if ((r = install_info_add(args[j])) < 0) {
log_warning("Cannot install unit %s: %s", args[j], strerror(-r));
goto finish;
}
while ((i = hashmap_first(will_install))) {
int q;

31
src/unit-name.c
View File

@ -21,8 +21,9 @@
#include <errno.h>
#include <string.h>
#include <assert.h>
#include "unit.h"
#include "util.h"
#include "unit-name.h"
#define VALID_CHARS \
@ -31,20 +32,7 @@
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
":-_.\\"
UnitType unit_name_to_type(const char *n) {
UnitType t;
assert(n);
for (t = 0; t < _UNIT_TYPE_MAX; t++)
if (endswith(n, unit_vtable[t]->suffix))
return t;
return _UNIT_TYPE_INVALID;
}
bool unit_name_is_valid(const char *n) {
UnitType t;
bool unit_name_is_valid_no_type(const char *n) {
const char *e, *i, *at;
/* Valid formats:
@ -58,13 +46,8 @@ bool unit_name_is_valid(const char *n) {
if (strlen(n) >= UNIT_NAME_MAX)
return false;
t = unit_name_to_type(n);
if (t < 0 || t >= _UNIT_TYPE_MAX)
return false;
assert_se(e = strrchr(n, '.'));
if (e == n)
e = strrchr(n, '.');
if (!e || e == n)
return false;
for (i = n, at = NULL; i < e; i++) {
@ -167,7 +150,7 @@ char *unit_name_change_suffix(const char *n, const char *suffix) {
size_t a, b;
assert(n);
assert(unit_name_is_valid(n));
assert(unit_name_is_valid_no_type(n));
assert(suffix);
assert_se(e = strrchr(n, '.'));
@ -190,7 +173,6 @@ char *unit_name_build(const char *prefix, const char *instance, const char *suff
assert(unit_prefix_is_valid(prefix));
assert(!instance || unit_instance_is_valid(instance));
assert(suffix);
assert(unit_name_to_type(suffix) >= 0);
if (!instance)
return strappend(prefix, suffix);
@ -226,7 +208,6 @@ char *unit_name_build_escape(const char *prefix, const char *instance, const cha
assert(prefix);
assert(suffix);
assert(unit_name_to_type(suffix) >= 0);
/* Takes a arbitrary string for prefix and instance plus a
* suffix and makes a nice string suitable as unit name of it,

6
src/unit-name.h
View File

@ -22,15 +22,15 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "unit.h"
#include <stdbool.h>
UnitType unit_name_to_type(const char *n);
#define UNIT_NAME_MAX 256
int unit_name_to_instance(const char *n, char **instance);
char* unit_name_to_prefix(const char *n);
char* unit_name_to_prefix_and_instance(const char *n);
bool unit_name_is_valid(const char *n);
bool unit_name_is_valid_no_type(const char *n);
bool unit_prefix_is_valid(const char *p);
bool unit_instance_is_valid(const char *i);

22
src/unit.c
View File

@ -2207,6 +2207,28 @@ bool unit_pending_active(Unit *u) {
return false;
}
UnitType unit_name_to_type(const char *n) {
UnitType t;
assert(n);
for (t = 0; t < _UNIT_TYPE_MAX; t++)
if (endswith(n, unit_vtable[t]->suffix))
return t;
return _UNIT_TYPE_INVALID;
}
bool unit_name_is_valid(const char *n) {
UnitType t;
t = unit_name_to_type(n);
if (t < 0 || t >= _UNIT_TYPE_MAX)
return false;
return unit_name_is_valid_no_type(n);
}
static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
[UNIT_STUB] = "stub",
[UNIT_LOADED] = "loaded",

4
src/unit.h
View File

@ -39,7 +39,6 @@ typedef enum UnitDependency UnitDependency;
#include "socket-util.h"
#include "execute.h"
#define UNIT_NAME_MAX 256
#define DEFAULT_TIMEOUT_USEC (60*USEC_PER_SEC)
#define DEFAULT_RESTART_USEC (100*USEC_PER_MSEC)
@ -504,6 +503,9 @@ bool unit_pending_active(Unit *u);
int unit_add_default_target_dependency(Unit *u, Unit *target);
UnitType unit_name_to_type(const char *n);
bool unit_name_is_valid(const char *n);
const char *unit_load_state_to_string(UnitLoadState i);
UnitLoadState unit_load_state_from_string(const char *s);