From: Lennart Poettering Date: Wed, 20 Mar 2013 21:56:25 +0000 (+0100) Subject: bus: hook up client with socket communication X-Git-Tag: upstream/199~131 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=89ffcd2ad5bf87866314e96c4179ba622851cd6e;p=platform%2Fupstream%2Fsystemd.git bus: hook up client with socket communication --- diff --git a/.gitignore b/.gitignore index 917b066..2d95f14 100644 --- a/.gitignore +++ b/.gitignore @@ -4,6 +4,7 @@ /ata_id /bootctl /build-aux +/busctl /cdrom_id /collect /gtk-doc.make @@ -82,6 +83,7 @@ /tags /test-bus-marshal /test-bus-signature +/test-bus-chat /test-calendarspec /test-catalog /test-cgroup diff --git a/Makefile.am b/Makefile.am index c94c192..d8e9b16 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1654,12 +1654,19 @@ libsystemd_bus_la_SOURCES = \ src/libsystemd-bus/bus-type.c \ src/libsystemd-bus/bus-type.h +libsystemd_bus_la_LIBADD = \ + libsystemd-id128-internal.la + noinst_LTLIBRARIES += \ libsystemd-bus.la noinst_tests += \ test-bus-marshal \ - test-bus-signature + test-bus-signature \ + test-bus-chat + +noinst_PROGRAMS += \ + busctl test_bus_marshal_SOURCES = \ src/libsystemd-bus/test-bus-marshal.c @@ -1682,6 +1689,25 @@ test_bus_signature_LDADD = \ libsystemd-shared.la \ libsystemd-bus.la +test_bus_chat_SOURCES = \ + src/libsystemd-bus/test-bus-chat.c + +test_bus_chat_CFLAGS = \ + $(AM_CFLAGS) \ + -pthread + +test_bus_chat_LDADD = \ + libsystemd-shared.la \ + libsystemd-bus.la \ + libsystemd-id128-internal.la + +busctl_SOURCES = \ + src/libsystemd-bus/busctl.c + +busctl_LDADD = \ + libsystemd-shared.la \ + libsystemd-bus.la + # ------------------------------------------------------------------------------ if ENABLE_GTK_DOC SUBDIRS += \ diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c index e4cc251..50e1a2c 100644 --- a/src/libsystemd-bus/bus-control.c +++ b/src/libsystemd-bus/bus-control.c @@ -107,7 +107,6 @@ int sd_bus_release_name(sd_bus *bus, const char *name) { int sd_bus_list_names(sd_bus *bus, char ***l) { _cleanup_bus_message_unref_ sd_bus_message *m1 = NULL, *reply1 = NULL, *m2 = NULL, *reply2 = NULL; - _cleanup_strv_free_ char **a = NULL, **b = NULL; char **x = NULL; int r; @@ -144,17 +143,17 @@ int sd_bus_list_names(sd_bus *bus, char ***l) { if (r < 0) return r; - r = sd_bus_message_read(reply1, "as", &a); - if (r < 0) + r = bus_message_read_strv_extend(reply1, &x); + if (r < 0) { + strv_free(x); return r; + } - r = sd_bus_message_read(reply2, "as", &b); - if (r < 0) + r = bus_message_read_strv_extend(reply2, &x); + if (r < 0) { + strv_free(x); return r; - - x = strv_merge(a, b); - if (!x) - return -ENOMEM; + } *l = strv_uniq(x); return 0; @@ -162,6 +161,7 @@ int sd_bus_list_names(sd_bus *bus, char ***l) { int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; + const char *found; int r; if (!bus) @@ -187,7 +187,21 @@ int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) { if (r < 0) return r; - return sd_bus_message_read(reply, "s", owner); + r = sd_bus_message_read(reply, "s", &found); + if (r < 0) + return r; + + if (owner) { + char *t; + + t = strdup(found); + if (!t) + return -ENOMEM; + + *owner = t; + } + + return 0; } int sd_bus_get_owner_uid(sd_bus *bus, const char *name, uid_t *uid) { @@ -245,7 +259,7 @@ int sd_bus_get_owner_pid(sd_bus *bus, const char *name, pid_t *pid) { "org.freedesktop.DBus", "/", "org.freedesktop.DBus", - "GetConnectionUnixUser", + "GetConnectionUnixProcessID", &m); if (r < 0) return r; diff --git a/src/libsystemd-bus/bus-error.c b/src/libsystemd-bus/bus-error.c index 015fae7..f86da62 100644 --- a/src/libsystemd-bus/bus-error.c +++ b/src/libsystemd-bus/bus-error.c @@ -86,6 +86,8 @@ int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...) } int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) { + char *x, *y = NULL; + if (!dest) return 0; if (bus_error_is_dirty(dest)) @@ -93,27 +95,21 @@ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) { if (!sd_bus_error_is_set(e)) return 0; - if (e->need_free) { - char *x, *y = NULL; + x = strdup(e->name); + if (!x) + return -ENOMEM; - x = strdup(e->name); - if (!x) + if (e->message) { + y = strdup(e->message); + if (!y) { + free(x); return -ENOMEM; - - if (e->message) { - y = strdup(e->message); - if (!y) { - free(x); - return -ENOMEM; - } } + } - dest->name = x; - dest->message = y; - dest->need_free = true; - } else - *dest = *e; - + dest->name = x; + dest->message = y; + dest->need_free = true; return 0; } diff --git a/src/libsystemd-bus/bus-internal.h b/src/libsystemd-bus/bus-internal.h index d8cdc48..9a12d66 100644 --- a/src/libsystemd-bus/bus-internal.h +++ b/src/libsystemd-bus/bus-internal.h @@ -50,8 +50,7 @@ enum bus_state { BUS_OPENING, BUS_AUTHENTICATING, BUS_HELLO, - BUS_RUNNING, - BUS_CLOSED + BUS_RUNNING }; struct sd_bus { @@ -60,7 +59,7 @@ struct sd_bus { int fd; int message_version; bool can_fds:1; - bool send_hello:1; + bool sent_hello:1; void *rbuffer; size_t rbuffer_size; @@ -99,3 +98,9 @@ struct sd_bus { size_t auth_size; char *auth_uid; }; + +static inline void bus_unrefp(sd_bus **b) { + sd_bus_unref(*b); +} + +#define _cleanup_bus_unref_ __attribute__((cleanup(bus_unrefp))) diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c index 5f3dbdb..c385ef5 100644 --- a/src/libsystemd-bus/bus-message.c +++ b/src/libsystemd-bus/bus-message.c @@ -23,6 +23,7 @@ #include "util.h" #include "utf8.h" +#include "strv.h" #include "sd-bus.h" #include "bus-message.h" @@ -322,6 +323,8 @@ int sd_bus_message_new_signal( if (!t) return -ENOMEM; + t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; + r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); if (r < 0) goto fail; @@ -409,6 +412,7 @@ static int message_new_reply( if (!t) return -ENOMEM; + t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; t->reply_serial = BUS_MESSAGE_SERIAL(call); r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial); @@ -424,6 +428,7 @@ static int message_new_reply( t->dont_send = !!(call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED); *m = t; + return 0; fail: message_free(t); @@ -1891,7 +1896,7 @@ eof: return 0; } -int sd_bus_message_rewind(sd_bus_message *m, bool complete) { +int sd_bus_message_rewind(sd_bus_message *m, int complete) { struct bus_container *c; if (!m) @@ -2424,6 +2429,10 @@ static int message_parse_fields(sd_bus_message *m) { break; } + /* Try to read the error message, but if we can't it's a non-issue */ + if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) + sd_bus_message_read(m, "s", &m->error.message); + return 0; } @@ -2724,3 +2733,34 @@ int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { return 0; } + +int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { + int r; + + assert(m); + assert(l); + + r = sd_bus_message_enter_container(m, 'a', "s"); + if (r < 0) + return r; + + for (;;) { + const char *s; + + r = sd_bus_message_read_basic(m, 's', &s); + if (r < 0) + return r; + if (r == 0) + break; + + r = strv_extend(l, s); + if (r < 0) + return r; + } + + r = sd_bus_message_exit_container(m); + if (r < 0) + return r; + + return 0; +} diff --git a/src/libsystemd-bus/bus-message.h b/src/libsystemd-bus/bus-message.h index 3035efc..0184d18 100644 --- a/src/libsystemd-bus/bus-message.h +++ b/src/libsystemd-bus/bus-message.h @@ -123,8 +123,8 @@ static inline void bus_message_unrefp(sd_bus_message **m) { #define _cleanup_bus_message_unref_ __attribute__((cleanup(bus_message_unrefp))) -int bus_message_parse(sd_bus_message *m); int bus_message_seal(sd_bus_message *m, uint64_t serial); int bus_message_dump(sd_bus_message *m); int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz); int bus_message_from_malloc(void *buffer, size_t length, sd_bus_message **ret); +int bus_message_read_strv_extend(sd_bus_message *m, char ***l); diff --git a/src/libsystemd-bus/busctl.c b/src/libsystemd-bus/busctl.c index 88446fc..7348894 100644 --- a/src/libsystemd-bus/busctl.c +++ b/src/libsystemd-bus/busctl.c @@ -19,15 +19,22 @@ along with systemd; If not, see . ***/ +#include "strv.h" +#include "util.h" +#include "log.h" + #include "sd-bus.h" +#include "bus-message.h" +#include "bus-internal.h" int main(int argc, char *argv[]) { _cleanup_bus_unref_ sd_bus *bus = NULL; _cleanup_strv_free_ char **l = NULL; char **i; int r; + size_t max_i = 0; - r = bus_open_system(&bus); + r = sd_bus_open_user(&bus); if (r < 0) { log_error("Failed to connect to bus: %s", strerror(-r)); goto fail; @@ -39,26 +46,57 @@ int main(int argc, char *argv[]) { goto fail; } + strv_sort(l); + + STRV_FOREACH(i, l) + max_i = MAX(max_i, strlen(*i)); + + printf("%-*s %*s %-*s %-*s CONNECTION\n", + (int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER"); + STRV_FOREACH(i, l) { _cleanup_free_ char *owner = NULL; - pid_t pid = 0; + pid_t pid; uid_t uid; - bool uid_valid; - r = sd_bus_get_owner(bus, *i, &owner); - if (r == -ENXIO) - continue; + /* if ((*i)[0] == ':') */ + /* continue; */ + + printf("%-*s", (int) max_i, *i); - r = sd_get_owner_pid(bus, *i, &pid); - if (r == -ENXIO) - continue; + r = sd_bus_get_owner_pid(bus, *i, &pid); + if (r >= 0) { + _cleanup_free_ char *comm = NULL; - r = sd_get_owner_uid(bus, *i, &pid); - if (r == -ENXIO) - continue; - uid_valid = r >= 0; + printf(" %10lu", (unsigned long) pid); - printf("%s (%s) %llu %llu\n", *i, owner, (unsigned long long) pid, (unsigned long long) uid); + get_process_comm(pid, &comm); + printf(" %-15s", strna(comm)); + } else + printf(" - - "); + + r = sd_bus_get_owner_uid(bus, *i, &uid); + if (r >= 0) { + _cleanup_free_ char *u = NULL; + + u = uid_to_name(uid); + if (!u) { + log_oom(); + goto fail; + } + + if (strlen(u) > 16) + u[16] = 0; + + printf(" %-16s", u); + } else + printf(" - "); + + r = sd_bus_get_owner(bus, *i, &owner); + if (r >= 0) + printf(" %s\n", owner); + else + printf(" -\n"); } r = 0; diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c index c5cbb56..f27d47c 100644 --- a/src/libsystemd-bus/sd-bus.c +++ b/src/libsystemd-bus/sd-bus.c @@ -39,6 +39,7 @@ static void bus_free(sd_bus *b) { struct filter_callback *f; + unsigned i; assert(b); @@ -46,9 +47,17 @@ static void bus_free(sd_bus *b) { close_nointr_nofail(b->fd); free(b->rbuffer); + free(b->unique_name); + free(b->auth_uid); + free(b->address); + + for (i = 0; i < b->rqueue_size; i++) + sd_bus_message_unref(b->rqueue[i]); free(b->rqueue); + + for (i = 0; i < b->wqueue_size; i++) + sd_bus_message_unref(b->wqueue[i]); free(b->wqueue); - free(b->unique_name); hashmap_free_free(b->reply_callbacks); @@ -122,24 +131,19 @@ static int bus_send_hello(sd_bus *bus) { if (r < 0) return r; - return 0; + bus->sent_hello = true; + return r; } static int bus_start_running(sd_bus *bus) { - int r; - assert(bus); - if (bus->send_hello) { + if (bus->sent_hello) { bus->state = BUS_HELLO; - - r = bus_send_hello(bus); - if (r < 0) - return r; + return 0; } bus->state = BUS_RUNNING; - return 0; } @@ -154,7 +158,7 @@ static int parse_address_key(const char **p, const char *key, char **value) { assert(value); l = strlen(key); - if (!strncmp(*p, key, l) != 0) + if (strncmp(*p, key, l) != 0) return 0; if ((*p)[l] != '=') @@ -164,7 +168,7 @@ static int parse_address_key(const char **p, const char *key, char **value) { return -EINVAL; a = *p + l + 1; - while (*a != ';' && *a != 0) { + while (*a != ',' && *a != 0) { char c, *t; if (*a == '%') { @@ -182,12 +186,14 @@ static int parse_address_key(const char **p, const char *key, char **value) { return y; } - a += 3; c = (char) ((x << 4) | y); - } else + a += 3; + } else { c = *a; + a++; + } - t = realloc(r, n + 1); + t = realloc(r, n + 2); if (!t) { free(r); return -ENOMEM; @@ -197,6 +203,16 @@ static int parse_address_key(const char **p, const char *key, char **value) { r[n++] = c; } + if (!r) { + r = strdup(""); + if (!r) + return -ENOMEM; + } else + r[n] = 0; + + if (*a == ',') + a++; + *p = a; *value = r; return 1; @@ -206,7 +222,10 @@ static void skip_address_key(const char **p) { assert(p); assert(*p); - *p += strcspn(*p, ";"); + *p += strcspn(*p, ","); + + if (**p == ',') + (*p) ++; } static int bus_parse_next_address(sd_bus *b) { @@ -231,7 +250,7 @@ static int bus_parse_next_address(sd_bus *b) { _cleanup_free_ char *path = NULL, *abstract = NULL; p = a + 5; - while (*p != 0 && *p != ';') { + while (*p != 0) { r = parse_address_key(&p, "guid", &guid); if (r < 0) return r; @@ -272,13 +291,13 @@ static int bus_parse_next_address(sd_bus *b) { } else if (abstract) { size_t l; - l = strlen(path); + l = strlen(abstract); if (l > sizeof(b->sockaddr.un.sun_path) - 1) return -E2BIG; b->sockaddr.un.sun_family = AF_UNIX; b->sockaddr.un.sun_path[0] = 0; - strncpy(b->sockaddr.un.sun_path+1, path, sizeof(b->sockaddr.un.sun_path)-1); + strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; } @@ -287,7 +306,7 @@ static int bus_parse_next_address(sd_bus *b) { struct addrinfo hints, *result; p = a + 4; - while (*p != 0 && *p != ';') { + while (*p != 0) { r = parse_address_key(&p, "guid", &guid); if (r < 0) return r; @@ -409,7 +428,7 @@ static int bus_auth_verify(sd_bus *b) { if (!e) return 0; - f = memmem(e, b->rbuffer_size - (e - (char*) b->rbuffer), "\r\n", 2); + f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2); if (!f) return 0; @@ -423,7 +442,7 @@ static int bus_auth_verify(sd_bus *b) { int x, y; x = unhexchar(((char*) b->rbuffer)[3 + i]); - y = unhexchar(((char*) b->rbuffer)[3 + i + 2]); + y = unhexchar(((char*) b->rbuffer)[3 + i + 1]); if (x < 0 || y < 0) return -EINVAL; @@ -446,6 +465,8 @@ static int bus_auth_verify(sd_bus *b) { memmove(b->rbuffer, f + 2, b->rbuffer_size); } + b->rbuffer_size = 0; + r = bus_start_running(b); if (r < 0) return r; @@ -459,6 +480,7 @@ static int bus_read_auth(sd_bus *b) { size_t n; ssize_t k; int r; + void *p; assert(b); @@ -467,6 +489,11 @@ static int bus_read_auth(sd_bus *b) { return r; n = MAX(3 + 32 + 2 + sizeof("AGREE_UNIX_FD") - 1 + 2, b->rbuffer_size * 2); + p = realloc(b->rbuffer, n); + if (!p) + return -ENOMEM; + + b->rbuffer = p; zero(iov); iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size; @@ -490,7 +517,7 @@ static int bus_read_auth(sd_bus *b) { } static int bus_start_auth(sd_bus *b) { - static const char auth_prefix[] = "\0AUTH_EXTERNAL "; + static const char auth_prefix[] = "\0AUTH EXTERNAL "; static const char auth_suffix[] = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n"; char text[20 + 1]; /* enough space for a 64bit integer plus NUL */ @@ -570,25 +597,25 @@ int sd_bus_open_system(sd_bus **ret) { r = sd_bus_open_address(e, &b); if (r < 0) return r; + } else { + b = bus_new(); + if (!b) + return -ENOMEM; - b->send_hello = true; - *ret = b; - return r; - } - - b = bus_new(); - if (!b) - return -ENOMEM; - - b->send_hello = true; + b->sockaddr.un.sun_family = AF_UNIX; + strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); + b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; - b->sockaddr.un.sun_family = AF_UNIX; - strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); - b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; + r = bus_start_connect(b); + if (r < 0) { + bus_free(b); + return r; + } + } - r = bus_start_connect(b); + r = bus_send_hello(b); if (r < 0) { - bus_free(b); + sd_bus_unref(b); return r; } @@ -610,33 +637,33 @@ int sd_bus_open_user(sd_bus **ret) { r = sd_bus_open_address(e, &b); if (r < 0) return r; + } else { + e = getenv("XDG_RUNTIME_DIR"); + if (!e) + return -ENOENT; - b->send_hello = true; - *ret = b; - return r; - } - - e = getenv("XDG_RUNTIME_DIR"); - if (!e) - return -ENOENT; - - l = strlen(e); - if (l + 4 > sizeof(b->sockaddr.un.sun_path)) - return -E2BIG; + l = strlen(e); + if (l + 4 > sizeof(b->sockaddr.un.sun_path)) + return -E2BIG; - b = bus_new(); - if (!b) - return -ENOMEM; + b = bus_new(); + if (!b) + return -ENOMEM; - b->send_hello = true; + b->sockaddr.un.sun_family = AF_UNIX; + memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); + b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; - b->sockaddr.un.sun_family = AF_UNIX; - memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); - b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; + r = bus_start_connect(b); + if (r < 0) { + bus_free(b); + return r; + } + } - r = bus_start_connect(b); + r = bus_send_hello(b); if (r < 0) { - bus_free(b); + sd_bus_unref(b); return r; } @@ -747,6 +774,8 @@ int sd_bus_can_send(sd_bus *bus, char type) { if (!bus) return -EINVAL; + if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) + return -EAGAIN; if (type == SD_BUS_TYPE_UNIX_FD) return bus->can_fds; @@ -757,6 +786,9 @@ int sd_bus_can_send(sd_bus *bus, char type) { static int bus_seal_message(sd_bus *b, sd_bus_message *m) { assert(m); + if (m->header->version > b->message_version) + return -EPERM; + if (m->sealed) return 0; @@ -773,6 +805,7 @@ static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) { assert(bus); assert(m); assert(idx); + assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); n = m->n_iovec * sizeof(struct iovec); iov = alloca(n); @@ -792,7 +825,7 @@ static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) { *idx += (size_t) k; iovec_advance(iov, &j, *idx); - return j > m->n_iovec; + return j >= m->n_iovec; } static int message_read_need(sd_bus *bus, size_t *need) { @@ -801,8 +834,9 @@ static int message_read_need(sd_bus *bus, size_t *need) { assert(bus); assert(need); + assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); - if (bus->rbuffer_size <= sizeof(struct bus_header)) { + if (bus->rbuffer_size < sizeof(struct bus_header)) { *need = sizeof(struct bus_header); return 0; } @@ -818,9 +852,9 @@ static int message_read_need(sd_bus *bus, size_t *need) { a = be32toh(a); b = be32toh(b); } else - return -EIO; + return -EBADMSG; - *need = sizeof(struct bus_header) + ALIGN_TO(a, 8) + b; + *need = sizeof(struct bus_header) + ALIGN_TO(b, 8) + a; return 0; } @@ -832,6 +866,7 @@ static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) { assert(bus); assert(m); assert(bus->rbuffer_size >= size); + assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); if (bus->rbuffer_size > size) { b = memdup((const uint8_t*) bus->rbuffer + size, bus->rbuffer_size - size); @@ -850,12 +885,6 @@ static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) { bus->rbuffer = b; bus->rbuffer_size -= size; - r = bus_message_parse(t); - if (r < 0) { - sd_bus_message_unref(t); - return r; - } - *m = t; return 1; } @@ -870,6 +899,7 @@ static int message_read(sd_bus *bus, sd_bus_message **m) { assert(bus); assert(m); + assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); r = message_read_need(bus, &need); if (r < 0) @@ -882,6 +912,8 @@ static int message_read(sd_bus *bus, sd_bus_message **m) { if (!b) return -ENOMEM; + bus->rbuffer = b; + zero(iov); iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size; iov.iov_len = need - bus->rbuffer_size; @@ -910,6 +942,7 @@ static int dispatch_wqueue(sd_bus *bus) { int r, c = 0; assert(bus); + assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); if (bus->fd < 0) return -ENOTCONN; @@ -951,6 +984,7 @@ static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { assert(bus); assert(m); + assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); if (bus->fd < 0) return -ENOTCONN; @@ -983,8 +1017,6 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { return -ENOTCONN; if (!m) return -EINVAL; - if (m->header->version > bus->message_version) - return -EPERM; r = bus_seal_message(bus, m); if (r < 0) @@ -995,7 +1027,7 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { if (m->dont_send && !serial) return 0; - if (bus->wqueue_size <= 0) { + if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { size_t idx = 0; r = message_write(bus, m, &idx); @@ -1057,14 +1089,20 @@ int sd_bus_send_with_reply( if (!bus) return -EINVAL; - if (!bus->fd < 0) + if (bus->fd < 0) return -ENOTCONN; if (!m) return -EINVAL; if (!callback) return -EINVAL; - if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) + if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) return -EINVAL; + if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) + return -EINVAL; + + r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); + if (r < 0) + return r; r = bus_seal_message(bus, m); if (r < 0) @@ -1111,6 +1149,30 @@ int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { return 1; } +static int ensure_running(sd_bus *bus) { + int r; + + assert(bus); + + r = sd_bus_is_running(bus); + if (r != 0) + return r; + + for (;;) { + r = sd_bus_process(bus, NULL); + if (r < 0) + return r; + + r = sd_bus_is_running(bus); + if (r != 0) + return r; + + r = sd_bus_wait(bus, (uint64_t) -1); + if (r < 0) + return r; + } +} + int sd_bus_send_with_reply_and_block( sd_bus *bus, sd_bus_message *m, @@ -1125,14 +1187,20 @@ int sd_bus_send_with_reply_and_block( if (!bus) return -EINVAL; - if (!bus->fd < 0) + if (bus->fd < 0) return -ENOTCONN; if (!m) return -EINVAL; - if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) + if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) return -EINVAL; - if (sd_bus_error_is_dirty(error)) + if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) return -EINVAL; + if (bus_error_is_dirty(error)) + return -EINVAL; + + r = ensure_running(bus); + if (r < 0) + return r; r = sd_bus_send(bus, m, &serial); if (r < 0) @@ -1162,6 +1230,9 @@ int sd_bus_send_with_reply_and_block( if (r < 0) return r; if (r > 0) { + /* bus_message_dump(incoming); */ + /* sd_bus_message_rewind(incoming, true); */ + if (incoming->reply_serial == serial) { /* Found a match! */ @@ -1223,7 +1294,7 @@ int sd_bus_get_fd(sd_bus *bus) { return -EINVAL; if (bus->fd < 0) - return -EINVAL; + return -ENOTCONN; return bus->fd; } @@ -1233,13 +1304,19 @@ int sd_bus_get_events(sd_bus *bus) { if (!bus) return -EINVAL; - if (bus->fd < 0) - return -EINVAL; + return -ENOTCONN; if (bus->state == BUS_OPENING) flags |= POLLOUT; - else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { + else if (bus->state == BUS_AUTHENTICATING) { + + if (bus->auth_index < ELEMENTSOF(bus->auth_iovec)) + flags |= POLLOUT; + + flags |= POLLIN; + + } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { if (bus->rqueue_size <= 0) flags |= POLLIN; if (bus->wqueue_size > 0) @@ -1250,7 +1327,6 @@ int sd_bus_get_events(sd_bus *bus) { } int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { - sd_bus_message *m; int r; if (!bus) @@ -1270,7 +1346,7 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { return -errno; if (p.revents & (POLLOUT|POLLERR|POLLHUP)) { - int error; + int error = 0; socklen_t slen = sizeof(error); r = getsockopt(bus->fd, SOL_SOCKET, SO_ERROR, &error, &slen); @@ -1297,13 +1373,14 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { return r; r = bus_read_auth(bus); - if (r <= 0) + if (r < 0) return r; - return bus_start_running(bus); + return 0; } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { struct filter_callback *l; + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; r = dispatch_wqueue(bus); if (r < 0) @@ -1321,31 +1398,40 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { r = c->callback(bus, m, c->userdata); free(c); - if (r != 0) { - sd_bus_message_unref(m); + if (r != 0) return r < 0 ? r : 0; - } } } LIST_FOREACH(callbacks, l, bus->filter_callbacks) { r = l->callback(bus, m, l->userdata); - if (r != 0) { - sd_bus_message_unref(m); + if (r != 0) return r < 0 ? r : 0; - } } if (ret) { *ret = m; + m = NULL; return 1; } - sd_bus_message_unref(m); + if (sd_bus_message_is_method_call(m, NULL, NULL)) { + const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownObject", "Unknown object."); + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + + r = sd_bus_message_new_method_error(bus, m, &e, &reply); + if (r < 0) + return r; + + r = sd_bus_send(bus, reply, NULL); + if (r < 0) + return r; + } + return 0; } - return -ENOTSUP; + assert_not_reached("Unknown state"); } int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { @@ -1356,7 +1442,10 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { if (!bus) return -EINVAL; if (bus->fd < 0) - return -ECONNREFUSED; + return -ENOTCONN; + + if (bus->rqueue_size > 0) + return 0; e = sd_bus_get_events(bus); if (e < 0) @@ -1368,7 +1457,7 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { r = ppoll(&p, 1, timeout_usec == (uint64_t) -1 ? NULL : timespec_store(&ts, timeout_usec), NULL); if (r < 0) - return -EINVAL; + return -errno; return r; } @@ -1381,7 +1470,11 @@ int sd_bus_flush(sd_bus *bus) { if (bus->fd < 0) return -ENOTCONN; - if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0) + r = ensure_running(bus); + if (r < 0) + return r; + + if (bus->wqueue_size <= 0) return 0; for (;;) { @@ -1389,7 +1482,7 @@ int sd_bus_flush(sd_bus *bus) { if (r < 0) return r; - if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0) + if (bus->wqueue_size <= 0) return 0; r = sd_bus_wait(bus, (uint64_t) -1); diff --git a/src/libsystemd-bus/sd-bus.h b/src/libsystemd-bus/sd-bus.h index d892562..03ea4b8 100644 --- a/src/libsystemd-bus/sd-bus.h +++ b/src/libsystemd-bus/sd-bus.h @@ -32,6 +32,12 @@ * - make unix fd passing work * - add page donation logic * - api for appending/reading fixed arrays + * - always verify container depth + * - implement method timeout logic + * - implicitly set no_reply when a message-call is sent an the serial number ignored + * - reduce number of ppoll()s if we can avoid it + * - handle NULL strings nicer when appending + * - merge busctl into systemctl or so? */ typedef struct sd_bus sd_bus; @@ -117,7 +123,7 @@ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p); int sd_bus_message_enter_container(sd_bus_message *m, char type, const char *contents); int sd_bus_message_exit_container(sd_bus_message *m); int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents); -int sd_bus_message_rewind(sd_bus_message *m, bool complete); +int sd_bus_message_rewind(sd_bus_message *m, int complete); /* Bus management */ @@ -133,7 +139,8 @@ int sd_bus_remove_match(sd_bus *bus, const char *match); /* Error structures */ -#define SD_BUS_ERROR_INIT (NULL, NULL, 0) +#define SD_BUS_ERROR_INIT {NULL, NULL, 0} +#define SD_BUS_ERROR_INIT_CONST(name, message) {(name), (message), 0} void sd_bus_error_free(sd_bus_error *e); int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...); diff --git a/src/libsystemd-bus/test-bus-chat.c b/src/libsystemd-bus/test-bus-chat.c new file mode 100644 index 0000000..4260ca3 --- /dev/null +++ b/src/libsystemd-bus/test-bus-chat.c @@ -0,0 +1,242 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include +#include + +#include "log.h" +#include "util.h" + +#include "sd-bus.h" +#include "bus-message.h" + +static int server_init(sd_bus **_bus) { + sd_bus *bus = NULL; + int r; + + assert(_bus); + + r = sd_bus_open_user(&bus); + if (r < 0) { + log_error("Failed to connect to user bus: %s", strerror(-r)); + goto fail; + } + + r = sd_bus_request_name(bus, "org.freedesktop.systemd.test", 0); + if (r < 0) { + log_error("Failed to acquire name: %s", strerror(-r)); + goto fail; + } + + *_bus = bus; + return 0; + +fail: + if (bus) + sd_bus_unref(bus); + + return r; +} + +static void* server(void *p) { + sd_bus *bus = p; + int r; + + for (;;) { + _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; + + r = sd_bus_process(bus, &m); + if (r < 0) { + log_error("Failed to process requests: %s", strerror(-r)); + goto fail; + } + if (r == 0) { + r = sd_bus_wait(bus, (uint64_t) -1); + if (r < 0) { + log_error("Failed to wait: %s", strerror(-r)); + goto fail; + } + + continue; + } + + log_info("Got message! %s", strna(sd_bus_message_get_member(m))); + /* bus_message_dump(m); */ + /* sd_bus_message_rewind(m, true); */ + + if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "LowerCase")) { + const char *hello; + _cleanup_free_ char *lowercase = NULL; + + r = sd_bus_message_read(m, "s", &hello); + if (r < 0) { + log_error("Failed to get parameter: %s", strerror(-r)); + goto fail; + } + + r = sd_bus_message_new_method_return(bus, m, &reply); + if (r < 0) { + log_error("Failed to allocate return: %s", strerror(-r)); + goto fail; + } + + lowercase = strdup(hello); + if (!lowercase) { + r = log_oom(); + goto fail; + } + + ascii_strlower(lowercase); + + r = sd_bus_message_append(reply, "s", lowercase); + if (r < 0) { + log_error("Failed to append message: %s", strerror(-r)); + goto fail; + } + } else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Exit")) + break; + else if (sd_bus_message_is_method_call(m, NULL, NULL)) { + const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownMethod", "Unknown method."); + + r = sd_bus_message_new_method_error(bus, m, &e, &reply); + if (r < 0) { + log_error("Failed to allocate return: %s", strerror(-r)); + goto fail; + } + } + + if (reply) { + r = sd_bus_send(bus, reply, NULL); + if (r < 0) { + log_error("Failed to send reply: %s", strerror(-r)); + goto fail; + } + } + } + + r = 0; + +fail: + if (bus) + sd_bus_unref(bus); + + return INT_TO_PTR(r); +} + +static int client(void) { + _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; + sd_bus *bus = NULL; + sd_bus_error error = SD_BUS_ERROR_INIT; + const char *hello; + int r; + + r = sd_bus_open_user(&bus); + if (r < 0) { + log_error("Failed to connect to user bus: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_message_new_method_call( + bus, + "org.freedesktop.systemd.test", + "/", + "org.freedesktop.systemd.test", + "LowerCase", + &m); + if (r < 0) { + log_error("Failed to allocate method call: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_message_append(m, "s", "HELLO"); + if (r < 0) { + log_error("Failed to append string: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_send_with_reply_and_block(bus, m, (uint64_t) -1, &error, &reply); + if (r < 0) { + log_error("Failed to issue method call: %s", error.message); + goto finish; + } + + r = sd_bus_message_read(reply, "s", &hello); + if (r < 0) { + log_error("Failed to get string: %s", strerror(-r)); + goto finish; + } + + assert(streq(hello, "hello")); + + r = 0; + +finish: + if (bus) { + _cleanup_bus_message_unref_ sd_bus_message *q; + + r = sd_bus_message_new_method_call( + bus, + "org.freedesktop.systemd.test", + "/", + "org.freedesktop.systemd.test", + "Exit", + &q); + if (r < 0) { + log_error("Failed to allocate method call: %s", strerror(-r)); + goto finish; + } + + sd_bus_send(bus, q, NULL); + sd_bus_flush(bus); + sd_bus_unref(bus); + } + + sd_bus_error_free(&error); + return r; +} + +int main(int argc, char *argv[]) { + pthread_t t; + sd_bus *bus; + void *p; + int q, r; + + r = server_init(&bus); + if (r < 0) + return EXIT_FAILURE; + + r = pthread_create(&t, NULL, server, bus); + if (r != 0) { + sd_bus_unref(bus); + return EXIT_FAILURE; + } + + r = client(); + + q = pthread_join(t, &p); + if (q != 0) + return EXIT_FAILURE; + if (r < 0) + return EXIT_FAILURE; + + return EXIT_SUCCESS; +}