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install: add new installer implementation

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This new installer will replace the current code of "systemctl enable"
but also be available via D-Bus. It adds a couple of new features:

- Mask/Unmask calls
- Reenable call
- Preset call
- Support for enabling units temporarily (i.e. in /run/systemd instead
  of /etc/systemd)
- Enumeration of installed units
- Support for out-of-search-path units

systemctl and D-Bus are not hooked up with this yet
This commit is contained in:
Lennart Poettering 2011-07-22 04:21:18 +02:00
parent 09adcdf71d
commit 830964834f
7 changed files with 2397 additions and 1 deletions
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1
.gitignore vendored
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@ -1,3 +1,4 @@
test-install
org.freedesktop.hostname1.xml
org.freedesktop.locale1.xml
org.freedesktop.timedate1.xml

16
Makefile.am
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@ -210,7 +210,8 @@ noinst_PROGRAMS = \
test-cgroup \
test-env-replace \
test-strv \
test-login
test-login \
test-install
if HAVE_PAM
pamlib_LTLIBRARIES = \
@ -831,6 +832,19 @@ test_login_LDADD = \
libsystemd-basic.la \
libsystemd-login.la
test_install_SOURCES = \
src/test-install.c \
src/install.c \
src/path-lookup.c \
src/unit-name.c
test_install_CFLAGS = \
$(AM_CFLAGS) \
$(DBUS_CFLAGS)
test_install_LDADD = \
libsystemd-basic.la
systemd_logger_SOURCES = \
src/logger.c \
src/tcpwrap.c

1944
src/install.c Normal file
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86
src/install.h Normal file
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@ -0,0 +1,86 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef fooinstallhfoo
#define fooinstallhfoo
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "hashmap.h"
typedef enum UnitFileScope {
UNIT_FILE_SYSTEM,
UNIT_FILE_GLOBAL,
UNIT_FILE_USER,
_UNIT_FILE_SCOPE_MAX,
_UNIT_FILE_SCOPE_INVALID = -1
} UnitFileScope;
typedef enum UnitFileState {
UNIT_FILE_ENABLED,
UNIT_FILE_ENABLED_RUNTIME,
UNIT_FILE_LINKED,
UNIT_FILE_LINKED_RUNTIME,
UNIT_FILE_MASKED,
UNIT_FILE_MASKED_RUNTIME,
UNIT_FILE_STATIC,
UNIT_FILE_DISABLED,
_UNIT_FILE_STATE_MAX,
_UNIT_FILE_STATE_INVALID = -1
} UnitFileState;
typedef enum UnitFileChangeType {
UNIT_FILE_SYMLINK,
UNIT_FILE_UNLINK,
_UNIT_FILE_CHANGE_TYPE_MAX,
_UNIT_FILE_CHANGE_TYPE_INVALID = -1
} UnitFileChangeType;
typedef struct UnitFileChange {
UnitFileChangeType type;
char *path;
char *source;
} UnitFileChange;
typedef struct UnitFileList {
char *path;
UnitFileState state;
} UnitFileList;
int unit_file_enable(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], bool force, UnitFileChange **changes, unsigned *n_changes);
int unit_file_disable(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], UnitFileChange **changes, unsigned *n_changes);
int unit_file_reenable(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], bool force, UnitFileChange **changes, unsigned *n_changes);
int unit_file_link(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], bool force, UnitFileChange **changes, unsigned *n_changes);
int unit_file_preset(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], bool force, UnitFileChange **changes, unsigned *n_changes);
int unit_file_mask(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], bool force, UnitFileChange **changes, unsigned *n_changes);
int unit_file_unmask(UnitFileScope scope, bool runtime, const char *root_dir, char *files[], UnitFileChange **changes, unsigned *n_changes);
UnitFileState unit_file_get_state(UnitFileScope scope, const char *root_dir, const char *filename);
int unit_file_get_list(UnitFileScope scope, const char *root_dir, Hashmap *h);
void unit_file_list_free(Hashmap *h);
void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes);
int unit_file_query_preset(UnitFileScope scope, const char *name);
const char *unit_file_state_to_string(UnitFileState s);
UnitFileState unit_file_state_from_string(const char *s);
#endif

264
src/test-install.c Normal file
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@ -0,0 +1,264 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include "util.h"
#include "install.h"
static void dump_changes(UnitFileChange *c, unsigned n) {
unsigned i;
assert(n == 0 || c);
for (i = 0; i < n; i++) {
if (c[i].type == UNIT_FILE_UNLINK)
printf("rm '%s'\n", c[i].path);
else if (c[i].type == UNIT_FILE_SYMLINK)
printf("ln -s '%s' '%s'\n", c[i].source, c[i].path);
}
}
int main(int argc, char* argv[]) {
Hashmap *h;
UnitFileList *p;
Iterator i;
int r;
const char *const files[] = { "avahi-daemon.service", NULL };
const char *const files2[] = { "/home/lennart/test.service", NULL };
UnitFileChange *changes = NULL;
unsigned n_changes = 0;
h = hashmap_new(string_hash_func, string_compare_func);
r = unit_file_get_list(UNIT_FILE_SYSTEM, NULL, h);
assert_se(r == 0);
HASHMAP_FOREACH(p, h, i) {
UnitFileState s;
s = unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(p->path));
assert_se(p->state == s);
fprintf(stderr, "%s (%s)\n",
p->path,
unit_file_state_to_string(p->state));
}
unit_file_list_free(h);
log_error("enable");
r = unit_file_enable(UNIT_FILE_SYSTEM, false, NULL, (char**) files, false, &changes, &n_changes);
assert_se(r >= 0);
log_error("enable2");
r = unit_file_enable(UNIT_FILE_SYSTEM, false, NULL, (char**) files, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_ENABLED);
log_error("disable");
changes = NULL;
n_changes = 0;
r = unit_file_disable(UNIT_FILE_SYSTEM, false, NULL, (char**) files, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_DISABLED);
log_error("mask");
changes = NULL;
n_changes = 0;
r = unit_file_mask(UNIT_FILE_SYSTEM, false, NULL, (char**) files, false, &changes, &n_changes);
assert_se(r >= 0);
log_error("mask2");
r = unit_file_mask(UNIT_FILE_SYSTEM, false, NULL, (char**) files, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_MASKED);
log_error("unmask");
changes = NULL;
n_changes = 0;
r = unit_file_unmask(UNIT_FILE_SYSTEM, false, NULL, (char**) files, &changes, &n_changes);
assert_se(r >= 0);
log_error("unmask2");
r = unit_file_unmask(UNIT_FILE_SYSTEM, false, NULL, (char**) files, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_DISABLED);
log_error("mask");
changes = NULL;
n_changes = 0;
r = unit_file_mask(UNIT_FILE_SYSTEM, false, NULL, (char**) files, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_MASKED);
log_error("disable");
changes = NULL;
n_changes = 0;
r = unit_file_disable(UNIT_FILE_SYSTEM, false, NULL, (char**) files, &changes, &n_changes);
assert_se(r >= 0);
log_error("disable2");
r = unit_file_disable(UNIT_FILE_SYSTEM, false, NULL, (char**) files, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_MASKED);
log_error("umask");
changes = NULL;
n_changes = 0;
r = unit_file_unmask(UNIT_FILE_SYSTEM, false, NULL, (char**) files, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, files[0]) == UNIT_FILE_DISABLED);
log_error("enable files2");
changes = NULL;
n_changes = 0;
r = unit_file_enable(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == UNIT_FILE_ENABLED);
log_error("disable files2");
changes = NULL;
n_changes = 0;
r = unit_file_disable(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == _UNIT_FILE_STATE_INVALID);
log_error("link files2");
changes = NULL;
n_changes = 0;
r = unit_file_link(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == UNIT_FILE_LINKED);
log_error("disable files2");
changes = NULL;
n_changes = 0;
r = unit_file_disable(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == _UNIT_FILE_STATE_INVALID);
log_error("link files2");
changes = NULL;
n_changes = 0;
r = unit_file_link(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == UNIT_FILE_LINKED);
log_error("reenable files2");
changes = NULL;
n_changes = 0;
r = unit_file_reenable(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == UNIT_FILE_ENABLED);
log_error("disable files2");
changes = NULL;
n_changes = 0;
r = unit_file_disable(UNIT_FILE_SYSTEM, false, NULL, (char**) files2, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files2[0])) == _UNIT_FILE_STATE_INVALID);
log_error("preset files");
changes = NULL;
n_changes = 0;
r = unit_file_preset(UNIT_FILE_SYSTEM, false, NULL, (char**) files, false, &changes, &n_changes);
assert_se(r >= 0);
dump_changes(changes, n_changes);
unit_file_changes_free(changes, n_changes);
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, NULL, file_name_from_path(files[0])) == UNIT_FILE_ENABLED);
return 0;
}

81
src/util.c
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@ -1157,6 +1157,29 @@ int readlink_and_make_absolute(const char *p, char **r) {
return 0;
}
int readlink_and_canonicalize(const char *p, char **r) {
char *t, *s;
int j;
assert(p);
assert(r);
j = readlink_and_make_absolute(p, &t);
if (j < 0)
return j;
s = canonicalize_file_name(t);
if (s) {
free(t);
*r = s;
} else
*r = t;
path_kill_slashes(*r);
return 0;
}
int parent_of_path(const char *path, char **_r) {
const char *e, *a = NULL, *b = NULL, *p;
char *r;
@ -3944,6 +3967,17 @@ bool null_or_empty(struct stat *st) {
return false;
}
int null_or_empty_path(const char *fn) {
struct stat st;
assert(fn);
if (stat(fn, &st) < 0)
return -errno;
return null_or_empty(&st);
}
DIR *xopendirat(int fd, const char *name, int flags) {
int nfd;
DIR *d;
@ -5268,6 +5302,53 @@ int glob_exists(const char *path) {
return r;
}
int dirent_ensure_type(DIR *d, struct dirent *de) {
struct stat st;
assert(d);
assert(de);
if (de->d_type != DT_UNKNOWN)
return 0;
if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
return -errno;
de->d_type =
S_ISREG(st.st_mode) ? DT_REG :
S_ISDIR(st.st_mode) ? DT_DIR :
S_ISLNK(st.st_mode) ? DT_LNK :
S_ISFIFO(st.st_mode) ? DT_FIFO :
S_ISSOCK(st.st_mode) ? DT_SOCK :
S_ISCHR(st.st_mode) ? DT_CHR :
S_ISBLK(st.st_mode) ? DT_BLK :
DT_UNKNOWN;
return 0;
}
int in_search_path(const char *path, char **search) {
char **i, *parent;
int r;
r = parent_of_path(path, &parent);
if (r < 0)
return r;
r = 0;
STRV_FOREACH(i, search) {
if (path_equal(parent, *i)) {
r = 1;
break;
}
}
free(parent);
return r;
}
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",

6
src/util.h
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@ -217,6 +217,7 @@ char **replace_env_argv(char **argv, char **env);
int readlink_malloc(const char *p, char **r);
int readlink_and_make_absolute(const char *p, char **r);
int readlink_and_canonicalize(const char *p, char **r);
char *file_name_from_path(const char *p);
bool is_path(const char *p);
@ -385,6 +386,7 @@ int wait_for_terminate_and_warn(const char *name, pid_t pid);
_noreturn_ void freeze(void);
bool null_or_empty(struct stat *st);
int null_or_empty_path(const char *fn);
DIR *xopendirat(int dirfd, const char *name, int flags);
@ -448,6 +450,10 @@ int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **h
int glob_exists(const char *path);
int dirent_ensure_type(DIR *d, struct dirent *de);
int in_search_path(const char *path, char **search);
#define NULSTR_FOREACH(i, l) \
for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)