X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=service.c;h=da1c5e78e2a1faa85d429fd6688bf640ea2efebf;hp=53d5505c2ea16b007607291f7e32faf54b3d8763;hb=adcbe07c2f8d753dd8e1bcd577b383e2dd64cb7d;hpb=0fd030bea1afa032d9afc791db4165a6848604b8 diff --git a/service.c b/service.c index 53d5505c2..da1c5e78e 100644 --- a/service.c +++ b/service.c @@ -35,6 +35,17 @@ #define NEWLINES "\n\r" #define LINE_MAX 4096 +static const char * const rcnd_table[] = { + "/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, + "/boot.d", SPECIAL_BASIC_TARGET +}; + static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { [SERVICE_DEAD] = UNIT_INACTIVE, [SERVICE_START_PRE] = UNIT_ACTIVATING, @@ -128,8 +139,8 @@ static int sysv_chkconfig_order(Service *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. */ + /* For each pair of services where at least one lacks a LSB + * header, we use the start priority value to order things. */ LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) { Service *t; @@ -143,6 +154,9 @@ static int sysv_chkconfig_order(Service *s) { if (t->sysv_start_priority < 0) continue; + if (s->sysv_has_lsb && t->sysv_has_lsb) + continue; + if (t->sysv_start_priority < s->sysv_start_priority) d = UNIT_AFTER; else if (t->sysv_start_priority > s->sysv_start_priority) @@ -200,7 +214,67 @@ static int sysv_exec_commands(Service *s) { return 0; } -static int service_load_sysv_path(Service *s, const char *path) { +static int priority_from_rcd(Service *s, const char *init_script) { + char **p; + unsigned i; + + STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path) + for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) { + char *path; + DIR *d; + struct dirent *de; + + if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) + return -ENOMEM; + + d = opendir(path); + free(path); + + if (!d) { + if (errno != ENOENT) + log_warning("opendir() failed on %s: %s", path, strerror(errno)); + + continue; + } + + while ((de = readdir(d))) { + int a, b; + + if (ignore_file(de->d_name)) + continue; + + if (de->d_name[0] != 'S') + continue; + + if (strlen(de->d_name) < 4) + continue; + + if (!streq(de->d_name + 3, init_script)) + continue; + + /* Yay, we found it! Now decode the priority */ + + a = undecchar(de->d_name[1]); + b = undecchar(de->d_name[2]); + + if (a < 0 || b < 0) + continue; + + s->sysv_start_priority = a*10 + b; + + log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s))); + + closedir(d); + return 0; + } + + closedir(d); + } + + return 0; +} + +static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) { FILE *f; Unit *u; unsigned line = 0; @@ -211,7 +285,10 @@ static int service_load_sysv_path(Service *s, const char *path) { LSB, LSB_DESCRIPTION } state = NORMAL; - bool has_lsb = false; + + assert(s); + assert(path); + assert(new_state); u = UNIT(s); @@ -249,7 +326,7 @@ static int service_load_sysv_path(Service *s, const char *path) { if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) { state = LSB; - has_lsb = true; + s->sysv_has_lsb = true; continue; } @@ -470,22 +547,30 @@ static int service_load_sysv_path(Service *s, const char *path) { } } - /* If the init script has no LSB header, then let's - * enforce the ordering via the chkconfig - * priorities */ + /* If init scripts have no LSB header, then we enforce the + * ordering via the chkconfig priorities. We try to determine + * a priority for *all* init scripts here, since they are + * needed as soon as at least one non-LSB script is used. */ - if (!has_lsb) - if ((r = sysv_chkconfig_order(s)) < 0) + if (s->sysv_start_priority < 0) { + log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u)); + + if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0) goto finish; + if (s->sysv_start_priority < 0) + log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u)); + } + if ((r = sysv_exec_commands(s)) < 0) goto finish; - if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_SYSINIT_SERVICE)) < 0 || - (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_SYSINIT_SERVICE)) < 0) + if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 || + (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0) goto finish; - r = 1; + *new_state = UNIT_LOADED; + r = 0; finish: @@ -495,7 +580,7 @@ finish: return r; } -static int service_load_sysv_name(Service *s, const char *name) { +static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) { char **p; assert(s); @@ -511,22 +596,26 @@ static int service_load_sysv_name(Service *s, const char *name) { assert(endswith(path, ".service")); path[strlen(path)-8] = 0; - r = service_load_sysv_path(s, path); + r = service_load_sysv_path(s, path, new_state); free(path); - if (r != 0) + if (r < 0) return r; + + if (*new_state != UNIT_STUB) + break; } return 0; } -static int service_load_sysv(Service *s) { +static int service_load_sysv(Service *s, UnitLoadState *new_state) { const char *t; Iterator i; int r; assert(s); + assert(new_state); /* Load service data from SysV init scripts, preferably with * LSB headers ... */ @@ -535,21 +624,28 @@ static int service_load_sysv(Service *s) { return 0; if ((t = unit_id(UNIT(s)))) - if ((r = service_load_sysv_name(s, t)) != 0) + if ((r = service_load_sysv_name(s, t, new_state)) < 0) return r; - SET_FOREACH(t, UNIT(s)->meta.names, i) - if ((r == service_load_sysv_name(s, t)) != 0) - return r; + if (*new_state == UNIT_STUB) + SET_FOREACH(t, UNIT(s)->meta.names, i) { + if ((r == service_load_sysv_name(s, t, new_state)) < 0) + return r; + + if (*new_state != UNIT_STUB) + break; + } return 0; } -static int service_init(Unit *u) { +static int service_init(Unit *u, UnitLoadState *new_state) { int r; Service *s = SERVICE(u); assert(s); + assert(new_state); + assert(*new_state == UNIT_STUB); /* First, reset everything to the defaults, in case this is a * reload */ @@ -570,31 +666,38 @@ static int service_init(Unit *u) { s->permissions_start_only = false; s->root_directory_start_only = false; + s->sysv_has_lsb = false; + RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5); /* Load a .service file */ - if ((r = unit_load_fragment(u)) < 0) { - service_done(u); + if ((r = unit_load_fragment(u, new_state)) < 0) return r; - } /* Load a classic init script as a fallback, if we couldn't find anything */ - if (r == 0) - if ((r = service_load_sysv(s)) <= 0) { - service_done(u); - return r < 0 ? r : -ENOENT; - } + if (*new_state == UNIT_STUB) + if ((r = service_load_sysv(s, new_state)) < 0) + return r; - /* Load dropin directory data */ - if ((r = unit_load_dropin(u)) < 0) { - service_done(u); - return r; - } + /* Still nothing found? Then let's give up */ + if (*new_state == UNIT_STUB) + return -ENOENT; - /* Add default cgroup */ - if ((r = unit_add_default_cgroup(u)) < 0) { - service_done(u); + /* We were able to load something, then let's add in the + * dropin directories. */ + if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) return r; + + /* This is a new unit? Then let's add in some extras */ + if (*new_state == UNIT_LOADED) { + if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) + return r; + + if ((r = unit_add_default_cgroup(u)) < 0) + return r; + + if ((r = sysv_chkconfig_order(s)) < 0) + return r; } return 0; @@ -629,7 +732,6 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) { "%sPIDFile: %s\n", prefix, s->pid_file); - exec_context_dump(&s->exec_context, f, prefix); for (c = 0; c < _SERVICE_EXEC_MAX; c++) { @@ -645,14 +747,17 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) { if (s->sysv_path) fprintf(f, - "%sSysV Init Script Path: %s\n", - prefix, s->sysv_path); + "%sSysV Init Script Path: %s\n" + "%sSysV Init Script has LSB Header: %s\n", + prefix, s->sysv_path, + prefix, yes_no(s->sysv_has_lsb)); if (s->sysv_start_priority >= 0) fprintf(f, - "%sSysV Start Priority: %i\n", + "%sSysVStartPriority: %i\n", prefix, s->sysv_start_priority); + free(p2); } @@ -1638,17 +1743,6 @@ static void service_cgroup_notify_event(Unit *u) { } 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; @@ -1657,13 +1751,13 @@ static int service_enumerate(Manager *m) { assert(m); - STRV_FOREACH(p, m->sysvinit_path) - for (i = 0; i < ELEMENTSOF(rcnd); i += 2) { + STRV_FOREACH(p, m->sysvrcnd_path) + for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) { struct dirent *de; free(path); path = NULL; - if (asprintf(&path, "%s/%s", *p, rcnd[i]) < 0) { + if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) { r = -ENOMEM; goto finish; } @@ -1692,7 +1786,7 @@ static int service_enumerate(Manager *m) { free(fpath); fpath = NULL; - if (asprintf(&fpath, "%s/%s/%s", *p, rcnd[i], de->d_name) < 0) { + if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) { r = -ENOMEM; goto finish; } @@ -1715,7 +1809,7 @@ static int service_enumerate(Manager *m) { if ((r = manager_load_unit(m, name, &service)) < 0) goto finish; - if ((r = manager_load_unit(m, rcnd[i+1], &runlevel)) < 0) + if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0) goto finish; if (de->d_name[0] == 'S') { @@ -1724,7 +1818,18 @@ static int service_enumerate(Manager *m) { if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0) goto finish; - } else { + + } else if (de->d_name[0] == 'K' && + (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) || + streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) { + + /* We honour K links only for + * halt/reboot. For the normal + * runlevels we assume the + * stop jobs will be + * implicitly added by the + * core logic. */ + if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0) goto finish;