diff options
Diffstat (limited to 'src/analyze/analyze-dump.c')
| -rw-r--r-- | src/analyze/analyze-dump.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/analyze/analyze-dump.c b/src/analyze/analyze-dump.c new file mode 100644 index 0000000..2e838c9 --- /dev/null +++ b/src/analyze/analyze-dump.c @@ -0,0 +1,160 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "sd-bus.h" + +#include "analyze-dump.h" +#include "analyze.h" +#include "bus-error.h" +#include "bus-locator.h" +#include "bus-util.h" +#include "copy.h" + +static int dump_fallback(sd_bus *bus) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + const char *text; + int r; + + assert(bus); + + r = bus_call_method(bus, bus_systemd_mgr, "Dump", &error, &reply, NULL); + if (r < 0) + return log_error_errno(r, "Failed to call Dump: %s", bus_error_message(&error, r)); + + r = sd_bus_message_read(reply, "s", &text); + if (r < 0) + return bus_log_parse_error(r); + + fputs(text, stdout); + return 0; +} + +static int dump_fd_reply(sd_bus_message *message) { + int fd, r; + + r = sd_bus_message_read(message, "h", &fd); + if (r < 0) + return bus_log_parse_error(r); + + fflush(stdout); + r = copy_bytes(fd, STDOUT_FILENO, UINT64_MAX, 0); + if (r < 0) + return r; + + return 1; /* Success */ +} + +static int dump(sd_bus *bus) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + int r; + + r = bus_call_method(bus, bus_systemd_mgr, "DumpByFileDescriptor", &error, &reply, NULL); + if (IN_SET(r, -EACCES, -EBADR)) + return 0; /* Fall back to non-fd method. We need to do this even if the bus supports sending + * fds to cater to very old managers which didn't have the fd-based method. */ + if (r < 0) + return log_error_errno(r, "Failed to call DumpByFileDescriptor: %s", + bus_error_message(&error, r)); + + return dump_fd_reply(reply); +} + +static int dump_patterns_fallback(sd_bus *bus, char **patterns) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL; + const char *text; + int r; + + r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "DumpUnitsMatchingPatterns"); + if (r < 0) + return bus_log_create_error(r); + + r = sd_bus_message_append_strv(m, patterns); + if (r < 0) + return bus_log_create_error(r); + + r = sd_bus_call(bus, m, 0, &error, &reply); + if (r < 0) + return log_error_errno(r, "Failed to call DumpUnitsMatchingPatterns: %s", + bus_error_message(&error, r)); + + r = sd_bus_message_read(reply, "s", &text); + if (r < 0) + return bus_log_parse_error(r); + + fputs(text, stdout); + return 0; +} + +static int dump_patterns(sd_bus *bus, char **patterns) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL; + int r; + + r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "DumpUnitsMatchingPatternsByFileDescriptor"); + if (r < 0) + return bus_log_create_error(r); + + r = sd_bus_message_append_strv(m, patterns); + if (r < 0) + return bus_log_create_error(r); + + r = sd_bus_call(bus, m, 0, &error, &reply); + if (r < 0) + return log_error_errno(r, "Failed to call DumpUnitsMatchingPatternsByFileDescriptor: %s", + bus_error_message(&error, r)); + + return dump_fd_reply(reply); +} + +static int mangle_patterns(char **args, char ***ret) { + _cleanup_strv_free_ char **mangled = NULL; + int r; + + STRV_FOREACH(arg, args) { + char *t; + + r = unit_name_mangle_with_suffix(*arg, NULL, UNIT_NAME_MANGLE_GLOB, ".service", &t); + if (r < 0) + return log_error_errno(r, "Failed to mangle name '%s': %m", *arg); + + r = strv_consume(&mangled, t); + if (r < 0) + return log_oom(); + } + + if (strv_isempty(mangled)) + mangled = strv_free(mangled); + + *ret = TAKE_PTR(mangled); + return 0; +} + +int verb_dump(int argc, char *argv[], void *userdata) { + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + _cleanup_strv_free_ char **patterns = NULL; + int r; + + r = acquire_bus(&bus, NULL); + if (r < 0) + return bus_log_connect_error(r, arg_transport); + + pager_open(arg_pager_flags); + + r = mangle_patterns(strv_skip(argv, 1), &patterns); + if (r < 0) + return r; + + r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); + if (r < 0) + return log_error_errno(r, "Unable to determine if bus connection supports fd passing: %m"); + if (r > 0) + r = patterns ? dump_patterns(bus, patterns) : dump(bus); + if (r == 0) /* wasn't supported */ + r = patterns ? dump_patterns_fallback(bus, patterns) : dump_fallback(bus); + if (r < 0) + return r; + + return EXIT_SUCCESS; +} |