X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flibelogind%2Fsd-bus%2Fsd-bus.c;h=fcca0308de1a0094a7c906c638174e9d0a749f09;hp=eb9525ed71f13013a4a11bcd656f55d451578cf4;hb=97f445d2438a6bd711e54cc7140d8fed633607be;hpb=1cfc78c91965df340cdde100ad6cb3ed50b28927 diff --git a/src/libelogind/sd-bus/sd-bus.c b/src/libelogind/sd-bus/sd-bus.c index eb9525ed7..fcca0308d 100644 --- a/src/libelogind/sd-bus/sd-bus.c +++ b/src/libelogind/sd-bus/sd-bus.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -20,34 +18,40 @@ ***/ #include -#include -#include #include #include -#include #include - -#include "util.h" -#include "macro.h" -#include "strv.h" -#include "missing.h" -#include "def.h" -#include "cgroup-util.h" -#include "bus-label.h" +#include +#include +#include #include "sd-bus.h" + +#include "alloc-util.h" +#include "bus-container.h" +#include "bus-control.h" #include "bus-internal.h" -#include "bus-message.h" -#include "bus-type.h" -#include "bus-socket.h" #include "bus-kernel.h" -#include "bus-control.h" +#include "bus-label.h" +#include "bus-message.h" #include "bus-objects.h" -#include "bus-util.h" -#include "bus-container.h" #include "bus-protocol.h" -#include "bus-track.h" #include "bus-slot.h" +#include "bus-socket.h" +#include "bus-track.h" +#include "bus-type.h" +#include "bus-util.h" +#include "cgroup-util.h" +#include "def.h" +#include "fd-util.h" +#include "hexdecoct.h" +#include "hostname-util.h" +#include "macro.h" +#include "missing.h" +#include "parse-util.h" +#include "string-util.h" +#include "strv.h" +#include "util.h" #define log_debug_bus_message(m) \ do { \ @@ -68,18 +72,20 @@ static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); static int attach_io_events(sd_bus *b); static void detach_io_events(sd_bus *b); +static thread_local sd_bus *default_system_bus = NULL; +#if 0 /// UNNEEDED by elogind +static thread_local sd_bus *default_user_bus = NULL; +#endif // 0 +static thread_local sd_bus *default_starter_bus = NULL; + static void bus_close_fds(sd_bus *b) { assert(b); detach_io_events(b); - if (b->input_fd >= 0) - safe_close(b->input_fd); - - if (b->output_fd >= 0 && b->output_fd != b->input_fd) + if (b->input_fd != b->output_fd) safe_close(b->output_fd); - - b->input_fd = b->output_fd = -1; + b->output_fd = b->input_fd = safe_close(b->input_fd); } static void bus_reset_queues(sd_bus *b) { @@ -88,15 +94,13 @@ static void bus_reset_queues(sd_bus *b) { while (b->rqueue_size > 0) sd_bus_message_unref(b->rqueue[--b->rqueue_size]); - free(b->rqueue); - b->rqueue = NULL; + b->rqueue = mfree(b->rqueue); b->rqueue_allocated = 0; while (b->wqueue_size > 0) sd_bus_message_unref(b->wqueue[--b->wqueue_size]); - free(b->wqueue); - b->wqueue = NULL; + b->wqueue = mfree(b->wqueue); b->wqueue_allocated = 0; } @@ -220,8 +224,8 @@ _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { assert_return(bus, -EINVAL); assert_return(bus->state == BUS_UNSET, -EPERM); - assert_return(input_fd >= 0, -EINVAL); - assert_return(output_fd >= 0, -EINVAL); + assert_return(input_fd >= 0, -EBADF); + assert_return(output_fd >= 0, -EBADF); assert_return(!bus_pid_changed(bus), -ECHILD); bus->input_fd = input_fd; @@ -229,8 +233,7 @@ _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { return 0; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { char *p, **a; @@ -304,7 +307,6 @@ _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { return 0; } -#endif // 0 _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { uint64_t new_flags; @@ -345,8 +347,6 @@ _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { return 0; } -/// UNNEEDED by elogind -#if 0 _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { assert_return(bus, -EINVAL); assert_return(bus->state == BUS_UNSET, -EPERM); @@ -382,8 +382,7 @@ _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { return 0; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { assert_return(bus, -EINVAL); assert_return(!bus_pid_changed(bus), -ECHILD); @@ -424,7 +423,7 @@ static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *e } static int bus_send_hello(sd_bus *bus) { - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; int r; assert(bus); @@ -537,7 +536,7 @@ static void skip_address_key(const char **p) { *p += strcspn(*p, ","); if (**p == ',') - (*p) ++; + (*p)++; } static int parse_unix_address(sd_bus *b, const char **p, char **guid) { @@ -702,7 +701,7 @@ static int parse_exec_address(sd_bus *b, const char **p, char **guid) { goto fail; } - (*p) ++; + (*p)++; if (ul >= n_argv) { if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { @@ -834,8 +833,7 @@ static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) b->machine = machine; machine = NULL; } else { - free(b->machine); - b->machine = NULL; + b->machine = mfree(b->machine); } if (pid) { @@ -894,8 +892,7 @@ static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid b->machine = machine; machine = NULL; } else { - free(b->machine); - b->machine = NULL; + b->machine = mfree(b->machine); } if (pid) { @@ -905,10 +902,9 @@ static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid } else b->nspid = 0; - free(b->kernel); - b->kernel = strdup("/sys/fs/kdbus/0-system/bus"); - if (!b->kernel) - return -ENOMEM; + r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); + if (r < 0) + return r; return 0; } @@ -918,15 +914,11 @@ static void bus_reset_parsed_address(sd_bus *b) { zero(b->sockaddr); b->sockaddr_size = 0; - strv_free(b->exec_argv); - free(b->exec_path); - b->exec_path = NULL; - b->exec_argv = NULL; + b->exec_argv = strv_free(b->exec_argv); + b->exec_path = mfree(b->exec_path); b->server_id = SD_ID128_NULL; - free(b->kernel); - b->kernel = NULL; - free(b->machine); - b->machine = NULL; + b->kernel = mfree(b->kernel); + b->machine = mfree(b->machine); b->nspid = 0; } @@ -1021,6 +1013,8 @@ static int bus_parse_next_address(sd_bus *b) { } static int bus_start_address(sd_bus *b) { + bool container_kdbus_available = false; + bool kdbus_available = false; int r; assert(b); @@ -1030,19 +1024,40 @@ static int bus_start_address(sd_bus *b) { bus_close_fds(b); + /* + * Usually, if you provide multiple different bus-addresses, we + * try all of them in order. We use the first one that + * succeeds. However, if you mix kernel and unix addresses, we + * never try unix-addresses if a previous kernel address was + * tried and kdbus was available. This is required to prevent + * clients to fallback to the bus-proxy if kdbus is available + * but failed (eg., too many connections). + */ + if (b->exec_path) r = bus_socket_exec(b); -#if 0 - else if ((b->nspid > 0 || b->machine) && b->kernel) + else if ((b->nspid > 0 || b->machine) && b->kernel) { r = bus_container_connect_kernel(b); - else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) - r = bus_container_connect_socket(b); -#endif // 0 - else if (b->kernel) + if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) + container_kdbus_available = true; + + } else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) { + if (!container_kdbus_available) + r = bus_container_connect_socket(b); + else + skipped = true; + + } else if (b->kernel) { r = bus_kernel_connect(b); - else if (b->sockaddr.sa.sa_family != AF_UNSPEC) - r = bus_socket_connect(b); - else + if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) + kdbus_available = true; + + } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { + if (!kdbus_available) + r = bus_socket_connect(b); + else + skipped = true; + } else skipped = true; if (!skipped) { @@ -1147,12 +1162,19 @@ _public_ int sd_bus_open(sd_bus **ret) { if (e) { if (streq(e, "system")) return sd_bus_open_system(ret); +#if 0 /// elogind does not support systemd units else if (STR_IN_SET(e, "session", "user")) return sd_bus_open_user(ret); +#endif // 0 } e = secure_getenv("DBUS_STARTER_ADDRESS"); if (!e) { +#if 0 /// elogind does not support systemd units + if (cg_pid_get_owner_uid(0, NULL) >= 0) + return sd_bus_open_user(ret); + else +#endif // 0 return sd_bus_open_system(ret); } @@ -1230,8 +1252,11 @@ fail: return r; } +#if 0 /// elogind can not open/use a user bus int bus_set_address_user(sd_bus *b) { const char *e; + uid_t uid; + int r; assert(b); @@ -1239,6 +1264,10 @@ int bus_set_address_user(sd_bus *b) { if (e) return sd_bus_set_address(b, e); + r = cg_pid_get_owner_uid(0, &uid); + if (r < 0) + uid = getuid(); + e = secure_getenv("XDG_RUNTIME_DIR"); if (e) { _cleanup_free_ char *ee = NULL; @@ -1247,17 +1276,19 @@ int bus_set_address_user(sd_bus *b) { if (!ee) return -ENOMEM; - (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee); + (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, uid, ee); } else - (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()); + (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, uid); if (!b->address) return -ENOMEM; return 0; } +#endif // 0 _public_ int sd_bus_open_user(sd_bus **ret) { +#if 0 /// elogind does not support user buses sd_bus *b; int r; @@ -1288,6 +1319,9 @@ _public_ int sd_bus_open_user(sd_bus **ret) { fail: bus_free(b); return r; +#else + return sd_bus_open_system(ret); +#endif // 0 } int bus_set_address_system_remote(sd_bus *b, const char *host) { @@ -1460,7 +1494,9 @@ static void bus_enter_closing(sd_bus *bus) { } _public_ sd_bus *sd_bus_ref(sd_bus *bus) { - assert_return(bus, NULL); + + if (!bus) + return NULL; assert_se(REFCNT_INC(bus->n_ref) >= 2); @@ -1481,8 +1517,7 @@ _public_ sd_bus *sd_bus_unref(sd_bus *bus) { return NULL; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_is_open(sd_bus *bus) { assert_return(bus, -EINVAL); @@ -1516,8 +1551,7 @@ _public_ int sd_bus_can_send(sd_bus *bus, char type) { return bus_type_is_valid(type); } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { int r; @@ -1654,7 +1688,7 @@ static int dispatch_wqueue(sd_bus *bus) { * it got full, then all bets are off * anyway. */ - bus->wqueue_size --; + bus->wqueue_size--; sd_bus_message_unref(bus->wqueue[0]); memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); bus->windex = 0; @@ -1703,7 +1737,7 @@ static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd /* Dispatch a queued message */ *m = bus->rqueue[0]; - bus->rqueue_size --; + bus->rqueue_size--; memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); return 1; } @@ -1720,7 +1754,7 @@ static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd } static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { - _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); int r; assert_return(m, -EINVAL); @@ -1795,7 +1829,7 @@ static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) return -ENOMEM; - bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); + bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); } finish: @@ -1809,6 +1843,7 @@ _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { return bus_send_internal(bus, m, cookie, false); } +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { int r; @@ -1834,6 +1869,7 @@ _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destinat return sd_bus_send(bus, m, cookie); } +#endif // 0 static usec_t calc_elapse(uint64_t usec) { if (usec == (uint64_t) -1) @@ -1868,8 +1904,8 @@ _public_ int sd_bus_call_async( void *userdata, uint64_t usec) { - _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); - _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); + _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; int r; assert_return(m, -EINVAL); @@ -1967,43 +2003,45 @@ _public_ int sd_bus_call( sd_bus_error *error, sd_bus_message **reply) { - _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); usec_t timeout; uint64_t cookie; unsigned i; int r; - assert_return(m, -EINVAL); - assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); - assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); - assert_return(!bus_error_is_dirty(error), -EINVAL); + bus_assert_return(m, -EINVAL, error); + bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); + bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); + bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); if (!bus) bus = m->bus; - assert_return(!bus_pid_changed(bus), -ECHILD); - assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); + bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); + bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error); - if (!BUS_IS_OPEN(bus->state)) - return -ENOTCONN; + if (!BUS_IS_OPEN(bus->state)) { + r = -ENOTCONN; + goto fail; + } r = bus_ensure_running(bus); if (r < 0) - return r; + goto fail; i = bus->rqueue_size; r = bus_seal_message(bus, m, usec); if (r < 0) - return r; + goto fail; r = bus_remarshal_message(bus, &m); if (r < 0) - return r; + goto fail; r = bus_send_internal(bus, m, &cookie, true); if (r < 0) - return r; + goto fail; timeout = calc_elapse(m->timeout); @@ -2034,14 +2072,17 @@ _public_ int sd_bus_call( } r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); + sd_bus_message_unref(incoming); + return r; - } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) + } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { r = sd_bus_error_copy(error, &incoming->error); - else - r = -EIO; - sd_bus_message_unref(incoming); return r; + } else { + r = -EIO; + goto fail; + } } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && bus->unique_name && @@ -2057,7 +2098,8 @@ _public_ int sd_bus_call( * immediately. */ sd_bus_message_unref(incoming); - return -ELOOP; + r = -ELOOP; + goto fail; } /* Try to read more, right-away */ @@ -2068,10 +2110,10 @@ _public_ int sd_bus_call( if (r < 0) { if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { bus_enter_closing(bus); - return -ECONNRESET; + r = -ECONNRESET; } - return r; + goto fail; } if (r > 0) continue; @@ -2080,8 +2122,10 @@ _public_ int sd_bus_call( usec_t n; n = now(CLOCK_MONOTONIC); - if (n >= timeout) - return -ETIMEDOUT; + if (n >= timeout) { + r = -ETIMEDOUT; + goto fail; + } left = timeout - n; } else @@ -2089,22 +2133,28 @@ _public_ int sd_bus_call( r = bus_poll(bus, true, left); if (r < 0) - return r; - if (r == 0) - return -ETIMEDOUT; + goto fail; + if (r == 0) { + r = -ETIMEDOUT; + goto fail; + } r = dispatch_wqueue(bus); if (r < 0) { if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { bus_enter_closing(bus); - return -ECONNRESET; + r = -ECONNRESET; } - return r; + goto fail; } } + +fail: + return sd_bus_error_set_errno(error, r); } +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_get_fd(sd_bus *bus) { assert_return(bus, -EINVAL); @@ -2113,6 +2163,7 @@ _public_ int sd_bus_get_fd(sd_bus *bus) { return bus->input_fd; } +#endif // 0 _public_ int sd_bus_get_events(sd_bus *bus) { int flags = 0; @@ -2193,8 +2244,8 @@ _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { } static int process_timeout(sd_bus *bus) { - _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; - _cleanup_bus_message_unref_ sd_bus_message* m = NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; struct reply_callback *c; sd_bus_slot *slot; usec_t n; @@ -2230,7 +2281,7 @@ static int process_timeout(sd_bus *bus) { slot = container_of(c, sd_bus_slot, reply_callback); - bus->iteration_counter ++; + bus->iteration_counter++; bus->current_message = m; bus->current_slot = sd_bus_slot_ref(slot); @@ -2275,8 +2326,8 @@ static int process_hello(sd_bus *bus, sd_bus_message *m) { } static int process_reply(sd_bus *bus, sd_bus_message *m) { - _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; - _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; struct reply_callback *c; sd_bus_slot *slot; int r; @@ -2355,7 +2406,7 @@ static int process_reply(sd_bus *bus, sd_bus_message *m) { } static int process_filter(sd_bus *bus, sd_bus_message *m) { - _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; struct filter_callback *l; int r; @@ -2421,7 +2472,7 @@ static int process_match(sd_bus *bus, sd_bus_message *m) { } static int process_builtin(sd_bus *bus, sd_bus_message *m) { - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(bus); @@ -2553,7 +2604,7 @@ static int dispatch_track(sd_bus *bus) { } static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; int r; assert(bus); @@ -2617,7 +2668,7 @@ null_message: } static int process_closing(sd_bus *bus, sd_bus_message **ret) { - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; struct reply_callback *c; int r; @@ -2626,7 +2677,7 @@ static int process_closing(sd_bus *bus, sd_bus_message **ret) { c = ordered_hashmap_first(bus->reply_callbacks); if (c) { - _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; sd_bus_slot *slot; /* First, fail all outstanding method calls */ @@ -2788,8 +2839,7 @@ _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { return bus_process_internal(bus, false, 0, ret); } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { return bus_process_internal(bus, true, priority, ret); } @@ -2910,6 +2960,7 @@ _public_ int sd_bus_flush(sd_bus *bus) { } } +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_add_filter( sd_bus *bus, sd_bus_slot **slot, @@ -2936,6 +2987,7 @@ _public_ int sd_bus_add_filter( return 0; } +#endif // 0 _public_ int sd_bus_add_match( sd_bus *bus, @@ -3012,8 +3064,7 @@ finish: return r; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind int bus_remove_match_by_string( sd_bus *bus, const char *match, @@ -3290,8 +3341,7 @@ _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { return bus->current_message; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { assert_return(bus, NULL); @@ -3339,15 +3389,16 @@ static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus } _public_ int sd_bus_default_system(sd_bus **ret) { - static thread_local sd_bus *default_system_bus = NULL; - return bus_default(sd_bus_open_system, &default_system_bus, ret); } -_public_ int sd_bus_default_user(sd_bus **ret) { - static thread_local sd_bus *default_user_bus = NULL; +_public_ int sd_bus_default_user(sd_bus **ret) { +#if 0 /// elogind does not support user buses return bus_default(sd_bus_open_user, &default_user_bus, ret); +#else + return sd_bus_default_system(ret); +#endif // 0 } _public_ int sd_bus_default(sd_bus **ret) { @@ -3364,8 +3415,10 @@ _public_ int sd_bus_default(sd_bus **ret) { if (e) { if (streq(e, "system")) return sd_bus_default_system(ret); +#if 0 /// elogind does not support systemd units else if (STR_IN_SET(e, "user", "session")) return sd_bus_default_user(ret); +#endif // 0 } /* No type is specified, so we have not other option than to @@ -3373,7 +3426,6 @@ _public_ int sd_bus_default(sd_bus **ret) { e = secure_getenv("DBUS_STARTER_ADDRESS"); if (e) { - static thread_local sd_bus *default_starter_bus = NULL; return bus_default(sd_bus_open, &default_starter_bus, ret); } @@ -3381,11 +3433,15 @@ _public_ int sd_bus_default(sd_bus **ret) { /* Finally, if nothing is set use the cached connection for * the right scope */ +#if 0 /// elogind does not support systemd units + if (cg_pid_get_owner_uid(0, NULL) >= 0) + return sd_bus_default_user(ret); + else +#endif // 0 return sd_bus_default_system(ret); } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { assert_return(b, -EINVAL); assert_return(tid, -EINVAL); @@ -3443,7 +3499,171 @@ _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **ext *external_id = ret; return 1; } -#endif // 0 + +_public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { + _cleanup_strv_free_ char **labels = NULL; + char *path, *path_pos, **label_pos; + const char *sep, *template_pos; + size_t path_length; + va_list list; + int r; + + assert_return(out, -EINVAL); + assert_return(path_template, -EINVAL); + + path_length = strlen(path_template); + + va_start(list, path_template); + for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { + const char *arg; + char *label; + + arg = va_arg(list, const char *); + if (!arg) { + va_end(list); + return -EINVAL; + } + + label = bus_label_escape(arg); + if (!label) { + va_end(list); + return -ENOMEM; + } + + r = strv_consume(&labels, label); + if (r < 0) { + va_end(list); + return r; + } + + /* add label length, but account for the format character */ + path_length += strlen(label) - 1; + } + va_end(list); + + path = malloc(path_length + 1); + if (!path) + return -ENOMEM; + + path_pos = path; + label_pos = labels; + + for (template_pos = path_template; *template_pos; ) { + sep = strchrnul(template_pos, '%'); + path_pos = mempcpy(path_pos, template_pos, sep - template_pos); + if (!*sep) + break; + + path_pos = stpcpy(path_pos, *label_pos++); + template_pos = sep + 1; + } + + *path_pos = 0; + *out = path; + return 0; +} + +_public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { + _cleanup_strv_free_ char **labels = NULL; + const char *template_pos, *path_pos; + char **label_pos; + va_list list; + int r; + + /* + * This decodes an object-path based on a template argument. The + * template consists of a verbatim path, optionally including special + * directives: + * + * - Each occurrence of '%' in the template matches an arbitrary + * substring of a label in the given path. At most one such + * directive is allowed per label. For each such directive, the + * caller must provide an output parameter (char **) via va_arg. If + * NULL is passed, the given label is verified, but not returned. + * For each matched label, the *decoded* label is stored in the + * passed output argument, and the caller is responsible to free + * it. Note that the output arguments are only modified if the + * actualy path matched the template. Otherwise, they're left + * untouched. + * + * This function returns <0 on error, 0 if the path does not match the + * template, 1 if it matched. + */ + + assert_return(path, -EINVAL); + assert_return(path_template, -EINVAL); + + path_pos = path; + + for (template_pos = path_template; *template_pos; ) { + const char *sep; + size_t length; + char *label; + + /* verify everything until the next '%' matches verbatim */ + sep = strchrnul(template_pos, '%'); + length = sep - template_pos; + if (strncmp(path_pos, template_pos, length)) + return 0; + + path_pos += length; + template_pos += length; + + if (!*template_pos) + break; + + /* We found the next '%' character. Everything up until here + * matched. We now skip ahead to the end of this label and make + * sure it matches the tail of the label in the path. Then we + * decode the string in-between and save it for later use. */ + + ++template_pos; /* skip over '%' */ + + sep = strchrnul(template_pos, '/'); + length = sep - template_pos; /* length of suffix to match verbatim */ + + /* verify the suffixes match */ + sep = strchrnul(path_pos, '/'); + if (sep - path_pos < (ssize_t)length || + strncmp(sep - length, template_pos, length)) + return 0; + + template_pos += length; /* skip over matched label */ + length = sep - path_pos - length; /* length of sub-label to decode */ + + /* store unescaped label for later use */ + label = bus_label_unescape_n(path_pos, length); + if (!label) + return -ENOMEM; + + r = strv_consume(&labels, label); + if (r < 0) + return r; + + path_pos = sep; /* skip decoded label and suffix */ + } + + /* end of template must match end of path */ + if (*path_pos) + return 0; + + /* copy the labels over to the caller */ + va_start(list, path_template); + for (label_pos = labels; label_pos && *label_pos; ++label_pos) { + char **arg; + + arg = va_arg(list, char **); + if (arg) + *arg = *label_pos; + else + free(*label_pos); + } + va_end(list); + + free(labels); + labels = NULL; + return 1; +} _public_ int sd_bus_try_close(sd_bus *bus) { int r; @@ -3471,8 +3691,6 @@ _public_ int sd_bus_try_close(sd_bus *bus) { return 0; } -/// UNNEEDED by elogind -#if 0 _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { assert_return(bus, -EINVAL); assert_return(description, -EINVAL); @@ -3502,8 +3720,7 @@ int bus_get_root_path(sd_bus *bus) { return r; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { int r; @@ -3601,4 +3818,21 @@ _public_ int sd_bus_is_monitor(sd_bus *bus) { return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); } + +static void flush_close(sd_bus *bus) { + if (!bus) + return; + + /* Flushes and closes the specified bus. We take a ref before, + * to ensure the flushing does not cause the bus to be + * unreferenced. */ + + sd_bus_flush_close_unref(sd_bus_ref(bus)); +} + +_public_ void sd_bus_default_flush_close(void) { + flush_close(default_starter_bus); + flush_close(default_user_bus); + flush_close(default_system_bus); +} #endif // 0