Commit 2c4104f0 authored by Lennart Poettering's avatar Lennart Poettering
Browse files

service: add SysV init script parser

parent 890f434c
......@@ -75,6 +75,23 @@ struct Watch {
#define SPECIAL_LOGGER_SOCKET "systemd-logger.socket"
#define SPECIAL_KBREQUEST_TARGET "kbrequest.target"
#define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target"
#define SPECIAL_LOCAL_FS_TARGET "local-fs.target"
#define SPECIAL_NETWORK_TARGET "network.target"
#define SPECIAL_NSS_LOOKUP_TARGET "nss-lookup.target" /* LSB's $named */
#define SPECIAL_RPCBIND_TARGET "rpcbind.target" /* LSB's $portmap */
#define SPECIAL_REMOTE_FS_TARGET "remote-fs.target"
#define SPECIAL_SYSLOG_TARGET "syslog.target" /* Should pull in syslog.socket or syslog.service */
#define SPECIAL_RTC_SET_TARGET "rtc-set.target" /* LSB's $time */
/* For SysV compatibility. Usually an alias for a saner target. On
* SysV-free systems this doesn't exist. */
#define SPECIAL_RUNLEVEL0_TARGET "runlevel0.target"
#define SPECIAL_RUNLEVEL1_TARGET "runlevel1.target"
#define SPECIAL_RUNLEVEL2_TARGET "runlevel2.target"
#define SPECIAL_RUNLEVEL3_TARGET "runlevel3.target"
#define SPECIAL_RUNLEVEL4_TARGET "runlevel4.target"
#define SPECIAL_RUNLEVEL5_TARGET "runlevel5.target"
#define SPECIAL_RUNLEVEL6_TARGET "runlevel6.target"
struct Manager {
/* In which mode are we running */
......
......@@ -21,12 +21,19 @@
#include <errno.h>
#include <signal.h>
#include <dirent.h>
#include <unistd.h>
#include "unit.h"
#include "service.h"
#include "load-fragment.h"
#include "load-dropin.h"
#include "log.h"
#include "strv.h"
#define COMMENTS "#;\n"
#define NEWLINES "\n\r"
#define LINE_MAX 4096
static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
[SERVICE_DEAD] = UNIT_INACTIVE,
......@@ -53,6 +60,9 @@ static void service_done(Unit *u) {
free(s->pid_file);
s->pid_file = NULL;
free(s->sysv_path);
s->sysv_path = NULL;
exec_context_done(&s->exec_context);
exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
s->control_command = NULL;
......@@ -72,13 +82,457 @@ static void service_done(Unit *u) {
unit_unwatch_timer(u, &s->timer_watch);
}
static int sysv_translate_name(const char *name, char **_r) {
static const char * const table[] = {
"$local_fs", SPECIAL_LOCAL_FS_TARGET,
"$network", SPECIAL_NETWORK_TARGET,
"$named", SPECIAL_NSS_LOOKUP_TARGET,
"$portmap", SPECIAL_RPCBIND_TARGET,
"$remote_fs", SPECIAL_REMOTE_FS_TARGET,
"$syslog", SPECIAL_SYSLOG_TARGET,
"$time", SPECIAL_RTC_SET_TARGET
};
unsigned i;
char *r;
for (i = 0; i < ELEMENTSOF(table); i += 2)
if (streq(table[i], name)) {
if (!(r = strdup(table[i+1])))
return -ENOMEM;
goto finish;
}
if (*name == '$')
return 0;
if (asprintf(&r, "%s.service", name) < 0)
return -ENOMEM;
finish:
if (_r)
*_r = r;
return 1;
}
static int sysv_chkconfig_order(Service *s) {
Meta *other;
int r;
assert(s);
if (s->sysv_start_priority < 0)
return 0;
/* If no LSB header is found we try to order init scripts via
* the start priority of the chkconfig header. */
LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
Service *t;
UnitDependency d;
t = (Service*) other;
if (s == t)
continue;
if (t->sysv_start_priority < 0)
continue;
if (t->sysv_start_priority < s->sysv_start_priority)
d = UNIT_AFTER;
else if (t->sysv_start_priority > s->sysv_start_priority)
d = UNIT_BEFORE;
else
continue;
/* FIXME: Maybe we should compare the name here lexicographically? */
if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
return r;
}
return 0;
}
static ExecCommand *exec_command_new(const char *path, const char *arg1) {
ExecCommand *c;
if (!(c = new0(ExecCommand, 1)))
return NULL;
if (!(c->path = strdup(path))) {
free(c);
return NULL;
}
if (!(c->argv = strv_new(path, arg1, NULL))) {
free(c->path);
free(c);
return NULL;
}
return c;
}
static int sysv_exec_commands(Service *s) {
ExecCommand *c;
assert(s);
assert(s->sysv_path);
if (!(c = exec_command_new(s->sysv_path, "start")))
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
if (!(c = exec_command_new(s->sysv_path, "stop")))
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
if (!(c = exec_command_new(s->sysv_path, "reload")))
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
return 0;
}
static int service_load_sysv_path(Service *s, const char *path) {
FILE *f;
Unit *u;
unsigned line = 0;
int r;
enum {
NORMAL,
DESCRIPTION,
LSB,
LSB_DESCRIPTION
} state = NORMAL;
bool has_lsb = false;
u = UNIT(s);
if (!(f = fopen(path, "re"))) {
r = errno == ENOENT ? 0 : -errno;
goto finish;
}
s->type = SERVICE_FORKING;
s->restart = SERVICE_ONCE;
free(s->sysv_path);
if (!(s->sysv_path = strdup(path))) {
r = -ENOMEM;
goto finish;
}
while (!feof(f)) {
char l[LINE_MAX], *t;
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
r = -errno;
log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
goto finish;
}
line++;
t = strstrip(l);
if (*t != '#')
continue;
if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
state = LSB;
has_lsb = true;
continue;
}
if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
state = NORMAL;
continue;
}
t++;
t += strspn(t, WHITESPACE);
if (state == NORMAL) {
/* Try to parse Red Hat style chkconfig headers */
if (startswith(t, "chkconfig:")) {
int start_priority;
state = NORMAL;
if (sscanf(t+10, "%*15s %i %*i",
&start_priority) != 1) {
log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
continue;
}
if (start_priority < 0 || start_priority > 99) {
log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
continue;
}
s->sysv_start_priority = start_priority;
} else if (startswith(t, "description:")) {
size_t k = strlen(t);
char *d;
if (t[k-1] == '\\') {
state = DESCRIPTION;
t[k-1] = 0;
}
if (!(d = strdup(strstrip(t+12)))) {
r = -ENOMEM;
goto finish;
}
free(u->meta.description);
u->meta.description = d;
} else if (startswith(t, "pidfile:")) {
char *fn;
state = NORMAL;
fn = strstrip(t+8);
if (!path_is_absolute(fn)) {
log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
continue;
}
if (!(fn = strdup(fn))) {
r = -ENOMEM;
goto finish;
}
free(s->pid_file);
s->pid_file = fn;
}
} else if (state == DESCRIPTION) {
/* Try to parse Red Hat style description
* continuation */
size_t k = strlen(t);
char *d;
if (t[k-1] == '\\')
t[k-1] = 0;
else
state = NORMAL;
assert(u->meta.description);
if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
r = -ENOMEM;
goto finish;
}
free(u->meta.description);
u->meta.description = d;
} else if (state == LSB || state == LSB_DESCRIPTION) {
if (startswith(t, "Provides:")) {
char *i, *w;
size_t z;
state = LSB;
FOREACH_WORD(w, z, t+9, i) {
char *n, *m;
if (!(n = strndup(w, z))) {
r = -ENOMEM;
goto finish;
}
r = sysv_translate_name(n, &m);
free(n);
if (r < 0)
goto finish;
if (r == 0)
continue;
r = unit_add_name(u, m);
free(m);
if (r < 0)
goto finish;
}
} else if (startswith(t, "Required-Start:") ||
startswith(t, "Should-Start:")) {
char *i, *w;
size_t z;
state = LSB;
FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
char *n, *m;
if (!(n = strndup(w, z))) {
r = -ENOMEM;
goto finish;
}
r = sysv_translate_name(n, &m);
free(n);
if (r < 0)
goto finish;
if (r == 0)
continue;
if (!(r = unit_add_dependency_by_name(u, UNIT_AFTER, m)) < 0) {
free(m);
goto finish;
}
r = unit_add_dependency_by_name(
u,
startswith(t, "Required-Start:") ? UNIT_REQUIRES : UNIT_WANTS,
m);
free(m);
if (r < 0)
goto finish;
}
} else if (startswith(t, "Description:")) {
char *d;
state = LSB_DESCRIPTION;
if (!(d = strdup(strstrip(t+12)))) {
r = -ENOMEM;
goto finish;
}
free(u->meta.description);
u->meta.description = d;
} else if (startswith(t, "Short-Description:") && !u->meta.description) {
char *d;
/* We use the short description only
* if no long description is set. */
state = LSB;
if (!(d = strdup(strstrip(t+18)))) {
r = -ENOMEM;
goto finish;
}
free(u->meta.description);
u->meta.description = d;
} else if (state == LSB_DESCRIPTION) {
if (startswith(l, "#\t") || startswith(l, "# ")) {
char *d;
assert(u->meta.description);
if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
r = -ENOMEM;
goto finish;
}
free(u->meta.description);
u->meta.description = d;
} else
state = LSB;
}
}
}
/* If the init script has no LSB header, then let's
* enforce the ordering via the chkconfig
* priorities */
if (!has_lsb)
if ((r = sysv_chkconfig_order(s)) < 0)
goto finish;
if ((r = sysv_exec_commands(s)) < 0)
goto finish;
r = 1;
finish:
if (f)
fclose(f);
return r;
}
static int service_load_sysv_name(Service *s, const char *name) {
char **p;
assert(s);
assert(name);
STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
char *path;
int r;
if (asprintf(&path, "%s/%s", *p, name) < 0)
return -ENOMEM;
assert(endswith(path, ".service"));
path[strlen(path)-8] = 0;
r = service_load_sysv_path(s, path);
free(path);
if (r >= 0)
return r;
}
return 0;
}
static int service_load_sysv(Service *s) {
const char *t;
Iterator i;
int r;
assert(s);
/* Load service data from SysV init scripts, preferably with
* LSB headers ... */
return -ENOENT;
if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
return 0;
if ((t = unit_id(UNIT(s))))
if ((r = service_load_sysv_name(s, t)) != 0)
return r;
SET_FOREACH(t, UNIT(s)->meta.names, i)
if ((r == service_load_sysv_name(s, t)) != 0)
return r;
return 0;
}
static int service_init(Unit *u) {
......@@ -102,6 +556,8 @@ static int service_init(Unit *u) {
s->state = SERVICE_DEAD;
s->sysv_start_priority = -1;
RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
/* Load a .service file */
......@@ -161,6 +617,16 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) {
exec_command_dump_list(s->exec_command[c], f, prefix2);
}
if (s->sysv_path)
fprintf(f,
"%sSysV Init Script Path: %s\n",
prefix, s->sysv_path);
if (s->sysv_start_priority >= 0)
fprintf(f,
"%sSysV Start Priority: %i\n",
prefix, s->sysv_start_priority);
free(p2);
}
......@@ -1053,6 +1519,119 @@ static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
}
}
static int service_enumerate(Manager *m) {
static const char * const rcnd[] = {
"../rc0.d", SPECIAL_RUNLEVEL0_TARGET,
"../rc1.d", SPECIAL_RUNLEVEL1_TARGET,
"../rc2.d", SPECIAL_RUNLEVEL2_TARGET,
"../rc3.d", SPECIAL_RUNLEVEL3_TARGET,
"../rc4.d", SPECIAL_RUNLEVEL4_TARGET,
"../rc5.d", SPECIAL_RUNLEVEL5_TARGET,
"../rc6.d", SPECIAL_RUNLEVEL6_TARGET
};
char **p;
unsigned i;
DIR *d = NULL;
char *path = NULL, *fpath = NULL, *name = NULL;
int r;
assert(m);
STRV_FOREACH(p, m->sysvinit_path)
for (i = 0; i < ELEMENTSOF(rcnd); i += 2) {
struct dirent *de;
free(path);
path = NULL;
if (asprintf(&path, "%s/%s", *p, rcnd[i]) < 0) {
r = -ENOMEM;
goto finish;
}
if (d)
closedir(d);
if (!(d = opendir(path))) {
if (errno != ENOENT)
log_warning("opendir() failed on %s: %s", path, strerror(errno));
continue;
}
while ((de = readdir(d))) {
Unit *runlevel, *service;
if (ignore_file(de->d_name))
continue;
if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
continue;
if (strlen(de->d_name) < 4)
continue;
free(fpath);
fpath = NULL;
if (asprintf(&fpath, "%s/%s/%s", *p, rcnd[i], de->d_name) < 0) {
r = -ENOMEM;
goto finish;
}
if (access(fpath, X_OK) < 0) {
if (errno != ENOENT)
log_warning("access() failed on %s: %s", fpath, strerror(errno));
continue;
}
free(name);
name = NULL;
if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
r = -ENOMEM;
goto finish;
}
if ((r = manager_load_unit(m, name, &service)) < 0)
goto finish;
/* Don't allow that non-SysV services
* are started via rcN.d/ links. */
if (!SERVICE(service)->sysv_path)
continue;
if ((r = manager_load_unit(m, rcnd[i+1], &runlevel)) < 0)
goto finish;
if (de->d_name[0] == 'S') {
if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
goto finish;
if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
goto finish;
} else {
if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
goto finish;