371d72e05b
let's take this once step further, and add type-safety to cmsg_find(), and imply the CMSG_DATA() macro for finding the cmsg payload.
923 lines
29 KiB
C
923 lines
29 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <stddef.h>
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#include <unistd.h>
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#if HAVE_SELINUX
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#include <selinux/selinux.h>
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#endif
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#include "sd-daemon.h"
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#include "sd-event.h"
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#include "alloc-util.h"
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#include "dirent-util.h"
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#include "env-file.h"
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#include "errno-util.h"
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#include "escape.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "fs-util.h"
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#include "io-util.h"
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#include "journald-console.h"
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#include "journald-context.h"
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#include "journald-kmsg.h"
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#include "journald-server.h"
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#include "journald-stream.h"
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#include "journald-syslog.h"
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#include "journald-wall.h"
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#include "mkdir.h"
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#include "parse-util.h"
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#include "process-util.h"
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#include "selinux-util.h"
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#include "socket-util.h"
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#include "stdio-util.h"
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#include "string-util.h"
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#include "syslog-util.h"
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#include "tmpfile-util.h"
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#include "unit-name.h"
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#define STDOUT_STREAMS_MAX 4096
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typedef enum StdoutStreamState {
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STDOUT_STREAM_IDENTIFIER,
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STDOUT_STREAM_UNIT_ID,
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STDOUT_STREAM_PRIORITY,
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STDOUT_STREAM_LEVEL_PREFIX,
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STDOUT_STREAM_FORWARD_TO_SYSLOG,
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STDOUT_STREAM_FORWARD_TO_KMSG,
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STDOUT_STREAM_FORWARD_TO_CONSOLE,
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STDOUT_STREAM_RUNNING
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} StdoutStreamState;
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/* The different types of log record terminators: a real \n was read, a NUL character was read, the maximum line length
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* was reached, or the end of the stream was reached */
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typedef enum LineBreak {
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LINE_BREAK_NEWLINE,
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LINE_BREAK_NUL,
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LINE_BREAK_LINE_MAX,
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LINE_BREAK_EOF,
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} LineBreak;
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struct StdoutStream {
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Server *server;
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StdoutStreamState state;
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int fd;
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struct ucred ucred;
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char *label;
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char *identifier;
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char *unit_id;
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int priority;
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bool level_prefix:1;
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bool forward_to_syslog:1;
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bool forward_to_kmsg:1;
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bool forward_to_console:1;
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bool fdstore:1;
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bool in_notify_queue:1;
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char *buffer;
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size_t length;
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size_t allocated;
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sd_event_source *event_source;
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char *state_file;
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ClientContext *context;
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LIST_FIELDS(StdoutStream, stdout_stream);
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LIST_FIELDS(StdoutStream, stdout_stream_notify_queue);
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char id_field[STRLEN("_STREAM_ID=") + SD_ID128_STRING_MAX];
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};
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void stdout_stream_free(StdoutStream *s) {
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if (!s)
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return;
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if (s->server) {
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if (s->context)
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client_context_release(s->server, s->context);
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assert(s->server->n_stdout_streams > 0);
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s->server->n_stdout_streams--;
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LIST_REMOVE(stdout_stream, s->server->stdout_streams, s);
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if (s->in_notify_queue)
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LIST_REMOVE(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s);
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(void) server_start_or_stop_idle_timer(s->server); /* Maybe we are idle now? */
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}
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if (s->event_source) {
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sd_event_source_set_enabled(s->event_source, SD_EVENT_OFF);
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s->event_source = sd_event_source_unref(s->event_source);
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}
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safe_close(s->fd);
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free(s->label);
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free(s->identifier);
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free(s->unit_id);
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free(s->state_file);
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free(s->buffer);
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free(s);
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}
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DEFINE_TRIVIAL_CLEANUP_FUNC(StdoutStream*, stdout_stream_free);
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void stdout_stream_destroy(StdoutStream *s) {
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if (!s)
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return;
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if (s->state_file)
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(void) unlink(s->state_file);
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stdout_stream_free(s);
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}
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static int stdout_stream_save(StdoutStream *s) {
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_cleanup_(unlink_and_freep) char *temp_path = NULL;
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_cleanup_fclose_ FILE *f = NULL;
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int r;
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assert(s);
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if (s->state != STDOUT_STREAM_RUNNING)
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return 0;
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if (!s->state_file) {
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struct stat st;
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r = fstat(s->fd, &st);
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if (r < 0)
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return log_warning_errno(errno, "Failed to stat connected stream: %m");
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/* We use device and inode numbers as identifier for the stream */
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r = asprintf(&s->state_file, "%s/streams/%lu:%lu", s->server->runtime_directory, (unsigned long) st.st_dev, (unsigned long) st.st_ino);
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if (r < 0)
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return log_oom();
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}
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(void) mkdir_parents(s->state_file, 0755);
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r = fopen_temporary(s->state_file, &f, &temp_path);
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if (r < 0)
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goto fail;
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fprintf(f,
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"# This is private data. Do not parse\n"
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"PRIORITY=%i\n"
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"LEVEL_PREFIX=%i\n"
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"FORWARD_TO_SYSLOG=%i\n"
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"FORWARD_TO_KMSG=%i\n"
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"FORWARD_TO_CONSOLE=%i\n"
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"STREAM_ID=%s\n",
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s->priority,
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s->level_prefix,
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s->forward_to_syslog,
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s->forward_to_kmsg,
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s->forward_to_console,
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s->id_field + STRLEN("_STREAM_ID="));
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if (!isempty(s->identifier)) {
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_cleanup_free_ char *escaped;
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escaped = cescape(s->identifier);
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if (!escaped) {
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r = -ENOMEM;
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goto fail;
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}
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fprintf(f, "IDENTIFIER=%s\n", escaped);
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}
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if (!isempty(s->unit_id)) {
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_cleanup_free_ char *escaped;
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escaped = cescape(s->unit_id);
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if (!escaped) {
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r = -ENOMEM;
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goto fail;
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}
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fprintf(f, "UNIT=%s\n", escaped);
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}
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r = fflush_and_check(f);
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if (r < 0)
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goto fail;
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if (rename(temp_path, s->state_file) < 0) {
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r = -errno;
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goto fail;
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}
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temp_path = mfree(temp_path);
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if (!s->fdstore && !s->in_notify_queue) {
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LIST_PREPEND(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s);
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s->in_notify_queue = true;
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if (s->server->notify_event_source) {
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r = sd_event_source_set_enabled(s->server->notify_event_source, SD_EVENT_ON);
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if (r < 0)
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log_warning_errno(r, "Failed to enable notify event source: %m");
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}
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}
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return 0;
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fail:
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(void) unlink(s->state_file);
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return log_error_errno(r, "Failed to save stream data %s: %m", s->state_file);
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}
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static int stdout_stream_log(StdoutStream *s, const char *p, LineBreak line_break) {
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struct iovec *iovec;
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int priority;
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char syslog_priority[] = "PRIORITY=\0";
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char syslog_facility[STRLEN("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(int) + 1];
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_cleanup_free_ char *message = NULL, *syslog_identifier = NULL;
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size_t n = 0, m;
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int r;
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assert(s);
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assert(p);
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if (s->context)
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(void) client_context_maybe_refresh(s->server, s->context, NULL, NULL, 0, NULL, USEC_INFINITY);
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else if (pid_is_valid(s->ucred.pid)) {
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r = client_context_acquire(s->server, s->ucred.pid, &s->ucred, s->label, strlen_ptr(s->label), s->unit_id, &s->context);
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if (r < 0)
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log_warning_errno(r, "Failed to acquire client context, ignoring: %m");
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}
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priority = s->priority;
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if (s->level_prefix)
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syslog_parse_priority(&p, &priority, false);
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if (!client_context_test_priority(s->context, priority))
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return 0;
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if (isempty(p))
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return 0;
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if (s->forward_to_syslog || s->server->forward_to_syslog)
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server_forward_syslog(s->server, syslog_fixup_facility(priority), s->identifier, p, &s->ucred, NULL);
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if (s->forward_to_kmsg || s->server->forward_to_kmsg)
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server_forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
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if (s->forward_to_console || s->server->forward_to_console)
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server_forward_console(s->server, priority, s->identifier, p, &s->ucred);
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if (s->server->forward_to_wall)
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server_forward_wall(s->server, priority, s->identifier, p, &s->ucred);
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m = N_IOVEC_META_FIELDS + 7 + client_context_extra_fields_n_iovec(s->context);
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iovec = newa(struct iovec, m);
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iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=stdout");
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iovec[n++] = IOVEC_MAKE_STRING(s->id_field);
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syslog_priority[STRLEN("PRIORITY=")] = '0' + LOG_PRI(priority);
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iovec[n++] = IOVEC_MAKE_STRING(syslog_priority);
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if (priority & LOG_FACMASK) {
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xsprintf(syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority));
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iovec[n++] = IOVEC_MAKE_STRING(syslog_facility);
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}
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if (s->identifier) {
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syslog_identifier = strjoin("SYSLOG_IDENTIFIER=", s->identifier);
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if (syslog_identifier)
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iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier);
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}
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if (line_break != LINE_BREAK_NEWLINE) {
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const char *c;
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/* If this log message was generated due to an uncommon line break then mention this in the log
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* entry */
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c = line_break == LINE_BREAK_NUL ? "_LINE_BREAK=nul" :
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line_break == LINE_BREAK_LINE_MAX ? "_LINE_BREAK=line-max" :
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"_LINE_BREAK=eof";
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iovec[n++] = IOVEC_MAKE_STRING(c);
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}
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message = strjoin("MESSAGE=", p);
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if (message)
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iovec[n++] = IOVEC_MAKE_STRING(message);
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server_dispatch_message(s->server, iovec, n, m, s->context, NULL, priority, 0);
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return 0;
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}
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static int stdout_stream_line(StdoutStream *s, char *p, LineBreak line_break) {
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int r;
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char *orig;
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assert(s);
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assert(p);
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orig = p;
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p = strstrip(p);
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/* line breaks by NUL, line max length or EOF are not permissible during the negotiation part of the protocol */
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if (line_break != LINE_BREAK_NEWLINE && s->state != STDOUT_STREAM_RUNNING) {
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log_warning("Control protocol line not properly terminated.");
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return -EINVAL;
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}
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switch (s->state) {
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case STDOUT_STREAM_IDENTIFIER:
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if (!isempty(p)) {
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s->identifier = strdup(p);
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if (!s->identifier)
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return log_oom();
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}
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s->state = STDOUT_STREAM_UNIT_ID;
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return 0;
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case STDOUT_STREAM_UNIT_ID:
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if (s->ucred.uid == 0 &&
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unit_name_is_valid(p, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
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s->unit_id = strdup(p);
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if (!s->unit_id)
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return log_oom();
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}
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s->state = STDOUT_STREAM_PRIORITY;
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return 0;
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case STDOUT_STREAM_PRIORITY:
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r = safe_atoi(p, &s->priority);
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if (r < 0 || s->priority < 0 || s->priority > 999) {
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log_warning("Failed to parse log priority line.");
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return -EINVAL;
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}
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s->state = STDOUT_STREAM_LEVEL_PREFIX;
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return 0;
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case STDOUT_STREAM_LEVEL_PREFIX:
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r = parse_boolean(p);
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if (r < 0) {
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log_warning("Failed to parse level prefix line.");
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return -EINVAL;
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}
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s->level_prefix = r;
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s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
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return 0;
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case STDOUT_STREAM_FORWARD_TO_SYSLOG:
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r = parse_boolean(p);
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if (r < 0) {
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log_warning("Failed to parse forward to syslog line.");
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return -EINVAL;
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}
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s->forward_to_syslog = r;
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s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
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return 0;
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case STDOUT_STREAM_FORWARD_TO_KMSG:
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r = parse_boolean(p);
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if (r < 0) {
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log_warning("Failed to parse copy to kmsg line.");
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return -EINVAL;
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}
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s->forward_to_kmsg = r;
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s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
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return 0;
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case STDOUT_STREAM_FORWARD_TO_CONSOLE:
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r = parse_boolean(p);
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if (r < 0) {
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log_warning("Failed to parse copy to console line.");
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return -EINVAL;
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}
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s->forward_to_console = r;
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s->state = STDOUT_STREAM_RUNNING;
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/* Try to save the stream, so that journald can be restarted and we can recover */
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(void) stdout_stream_save(s);
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return 0;
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case STDOUT_STREAM_RUNNING:
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return stdout_stream_log(s, orig, line_break);
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}
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assert_not_reached("Unknown stream state");
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}
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static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
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char *p;
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size_t remaining;
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int r;
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assert(s);
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p = s->buffer;
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remaining = s->length;
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|
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/* XXX: This function does nothing if (s->length == 0) */
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for (;;) {
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LineBreak line_break;
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size_t skip;
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char *end1, *end2;
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end1 = memchr(p, '\n', remaining);
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end2 = memchr(p, 0, end1 ? (size_t) (end1 - p) : remaining);
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if (end2) {
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/* We found a NUL terminator */
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skip = end2 - p + 1;
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line_break = LINE_BREAK_NUL;
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} else if (end1) {
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/* We found a \n terminator */
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*end1 = 0;
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skip = end1 - p + 1;
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line_break = LINE_BREAK_NEWLINE;
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} else if (remaining >= s->server->line_max) {
|
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/* Force a line break after the maximum line length */
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*(p + s->server->line_max) = 0;
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skip = remaining;
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line_break = LINE_BREAK_LINE_MAX;
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} else
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break;
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r = stdout_stream_line(s, p, line_break);
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if (r < 0)
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return r;
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remaining -= skip;
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p += skip;
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}
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|
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if (force_flush && remaining > 0) {
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p[remaining] = 0;
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r = stdout_stream_line(s, p, LINE_BREAK_EOF);
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if (r < 0)
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return r;
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|
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p += remaining;
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remaining = 0;
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}
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|
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if (p > s->buffer) {
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memmove(s->buffer, p, remaining);
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s->length = remaining;
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}
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return 0;
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}
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|
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static int stdout_stream_process(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
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uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
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StdoutStream *s = userdata;
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struct ucred *ucred;
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struct iovec iovec;
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size_t limit;
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ssize_t l;
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int r;
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|
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struct msghdr msghdr = {
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.msg_iov = &iovec,
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.msg_iovlen = 1,
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.msg_control = buf,
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.msg_controllen = sizeof(buf),
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};
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assert(s);
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|
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if ((revents|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
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log_error("Got invalid event from epoll for stdout stream: %"PRIx32, revents);
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goto terminate;
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}
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|
|
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/* If the buffer is full already (discounting the extra NUL we need), add room for another 1K */
|
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if (s->length + 1 >= s->allocated) {
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if (!GREEDY_REALLOC(s->buffer, s->allocated, s->length + 1 + 1024)) {
|
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log_oom();
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goto terminate;
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}
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}
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|
|
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/* Try to make use of the allocated buffer in full, but never read more than the configured line size. Also,
|
|
* always leave room for a terminating NUL we might need to add. */
|
|
limit = MIN(s->allocated - 1, s->server->line_max);
|
|
|
|
iovec = IOVEC_MAKE(s->buffer + s->length, limit - s->length);
|
|
|
|
l = recvmsg(s->fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
|
|
if (l < 0) {
|
|
if (IN_SET(errno, EINTR, EAGAIN))
|
|
return 0;
|
|
|
|
log_warning_errno(errno, "Failed to read from stream: %m");
|
|
goto terminate;
|
|
}
|
|
cmsg_close_all(&msghdr);
|
|
|
|
if (l == 0) {
|
|
stdout_stream_scan(s, true);
|
|
goto terminate;
|
|
}
|
|
|
|
/* Invalidate the context if the pid of the sender changed. This happens when a forked process
|
|
* inherits stdout / stderr from a parent. In this case getpeercred returns the ucred of the parent,
|
|
* which can be invalid if the parent has exited in the meantime.
|
|
*/
|
|
ucred = CMSG_FIND_DATA(&msghdr, SOL_SOCKET, SCM_CREDENTIALS, struct ucred);
|
|
if (ucred && ucred->pid != s->ucred.pid) {
|
|
/* force out any previously half-written lines from a different process, before we switch to
|
|
* the new ucred structure for everything we just added */
|
|
r = stdout_stream_scan(s, true);
|
|
if (r < 0)
|
|
goto terminate;
|
|
|
|
s->ucred = *ucred;
|
|
client_context_release(s->server, s->context);
|
|
s->context = NULL;
|
|
}
|
|
|
|
s->length += l;
|
|
r = stdout_stream_scan(s, false);
|
|
if (r < 0)
|
|
goto terminate;
|
|
|
|
return 1;
|
|
|
|
terminate:
|
|
stdout_stream_destroy(s);
|
|
return 0;
|
|
}
|
|
|
|
int stdout_stream_install(Server *s, int fd, StdoutStream **ret) {
|
|
_cleanup_(stdout_stream_freep) StdoutStream *stream = NULL;
|
|
sd_id128_t id;
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(fd >= 0);
|
|
|
|
r = sd_id128_randomize(&id);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to generate stream ID: %m");
|
|
|
|
stream = new(StdoutStream, 1);
|
|
if (!stream)
|
|
return log_oom();
|
|
|
|
*stream = (StdoutStream) {
|
|
.fd = -1,
|
|
.priority = LOG_INFO,
|
|
};
|
|
|
|
xsprintf(stream->id_field, "_STREAM_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(id));
|
|
|
|
r = getpeercred(fd, &stream->ucred);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine peer credentials: %m");
|
|
|
|
r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
|
|
if (r < 0)
|
|
return log_error_errno(r, "SO_PASSCRED failed: %m");
|
|
|
|
if (mac_selinux_use()) {
|
|
r = getpeersec(fd, &stream->label);
|
|
if (r < 0 && r != -EOPNOTSUPP)
|
|
(void) log_warning_errno(r, "Failed to determine peer security context: %m");
|
|
}
|
|
|
|
(void) shutdown(fd, SHUT_WR);
|
|
|
|
r = sd_event_add_io(s->event, &stream->event_source, fd, EPOLLIN, stdout_stream_process, stream);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to add stream to event loop: %m");
|
|
|
|
r = sd_event_source_set_priority(stream->event_source, SD_EVENT_PRIORITY_NORMAL+5);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to adjust stdout event source priority: %m");
|
|
|
|
stream->fd = fd;
|
|
|
|
stream->server = s;
|
|
LIST_PREPEND(stdout_stream, s->stdout_streams, stream);
|
|
s->n_stdout_streams++;
|
|
|
|
(void) server_start_or_stop_idle_timer(s); /* Maybe no longer idle? */
|
|
|
|
if (ret)
|
|
*ret = stream;
|
|
|
|
TAKE_PTR(stream);
|
|
return 0;
|
|
}
|
|
|
|
static int stdout_stream_new(sd_event_source *es, int listen_fd, uint32_t revents, void *userdata) {
|
|
_cleanup_close_ int fd = -1;
|
|
Server *s = userdata;
|
|
int r;
|
|
|
|
assert(s);
|
|
|
|
if (revents != EPOLLIN)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Got invalid event from epoll for stdout server fd: %" PRIx32,
|
|
revents);
|
|
|
|
fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
|
|
if (fd < 0) {
|
|
if (ERRNO_IS_ACCEPT_AGAIN(errno))
|
|
return 0;
|
|
|
|
return log_error_errno(errno, "Failed to accept stdout connection: %m");
|
|
}
|
|
|
|
if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
|
|
struct ucred u;
|
|
|
|
r = getpeercred(fd, &u);
|
|
|
|
/* By closing fd here we make sure that the client won't wait too long for journald to
|
|
* gather all the data it adds to the error message to find out that the connection has
|
|
* just been refused.
|
|
*/
|
|
fd = safe_close(fd);
|
|
|
|
server_driver_message(s, r < 0 ? 0 : u.pid, NULL, LOG_MESSAGE("Too many stdout streams, refusing connection."), NULL);
|
|
return 0;
|
|
}
|
|
|
|
r = stdout_stream_install(s, fd, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
TAKE_FD(fd);
|
|
return 0;
|
|
}
|
|
|
|
static int stdout_stream_load(StdoutStream *stream, const char *fname) {
|
|
_cleanup_free_ char
|
|
*priority = NULL,
|
|
*level_prefix = NULL,
|
|
*forward_to_syslog = NULL,
|
|
*forward_to_kmsg = NULL,
|
|
*forward_to_console = NULL,
|
|
*stream_id = NULL;
|
|
int r;
|
|
|
|
assert(stream);
|
|
assert(fname);
|
|
|
|
if (!stream->state_file) {
|
|
stream->state_file = path_join(stream->server->runtime_directory, "streams", fname);
|
|
if (!stream->state_file)
|
|
return log_oom();
|
|
}
|
|
|
|
r = parse_env_file(NULL, stream->state_file,
|
|
"PRIORITY", &priority,
|
|
"LEVEL_PREFIX", &level_prefix,
|
|
"FORWARD_TO_SYSLOG", &forward_to_syslog,
|
|
"FORWARD_TO_KMSG", &forward_to_kmsg,
|
|
"FORWARD_TO_CONSOLE", &forward_to_console,
|
|
"IDENTIFIER", &stream->identifier,
|
|
"UNIT", &stream->unit_id,
|
|
"STREAM_ID", &stream_id);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read: %s", stream->state_file);
|
|
|
|
if (priority) {
|
|
int p;
|
|
|
|
p = log_level_from_string(priority);
|
|
if (p >= 0)
|
|
stream->priority = p;
|
|
}
|
|
|
|
if (level_prefix) {
|
|
r = parse_boolean(level_prefix);
|
|
if (r >= 0)
|
|
stream->level_prefix = r;
|
|
}
|
|
|
|
if (forward_to_syslog) {
|
|
r = parse_boolean(forward_to_syslog);
|
|
if (r >= 0)
|
|
stream->forward_to_syslog = r;
|
|
}
|
|
|
|
if (forward_to_kmsg) {
|
|
r = parse_boolean(forward_to_kmsg);
|
|
if (r >= 0)
|
|
stream->forward_to_kmsg = r;
|
|
}
|
|
|
|
if (forward_to_console) {
|
|
r = parse_boolean(forward_to_console);
|
|
if (r >= 0)
|
|
stream->forward_to_console = r;
|
|
}
|
|
|
|
if (stream_id) {
|
|
sd_id128_t id;
|
|
|
|
r = sd_id128_from_string(stream_id, &id);
|
|
if (r >= 0)
|
|
xsprintf(stream->id_field, "_STREAM_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(id));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int stdout_stream_restore(Server *s, const char *fname, int fd) {
|
|
StdoutStream *stream;
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(fname);
|
|
assert(fd >= 0);
|
|
|
|
if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
|
|
log_warning("Too many stdout streams, refusing restoring of stream.");
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
r = stdout_stream_install(s, fd, &stream);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
stream->state = STDOUT_STREAM_RUNNING;
|
|
stream->fdstore = true;
|
|
|
|
/* Ignore all parsing errors */
|
|
(void) stdout_stream_load(stream, fname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int server_restore_streams(Server *s, FDSet *fds) {
|
|
_cleanup_closedir_ DIR *d = NULL;
|
|
struct dirent *de;
|
|
const char *path;
|
|
int r;
|
|
|
|
path = strjoina(s->runtime_directory, "/streams");
|
|
d = opendir(path);
|
|
if (!d) {
|
|
if (errno == ENOENT)
|
|
return 0;
|
|
|
|
return log_warning_errno(errno, "Failed to enumerate %s: %m", path);
|
|
}
|
|
|
|
FOREACH_DIRENT(de, d, goto fail) {
|
|
unsigned long st_dev, st_ino;
|
|
bool found = false;
|
|
Iterator i;
|
|
int fd;
|
|
|
|
if (sscanf(de->d_name, "%lu:%lu", &st_dev, &st_ino) != 2)
|
|
continue;
|
|
|
|
FDSET_FOREACH(fd, fds, i) {
|
|
struct stat st;
|
|
|
|
if (fstat(fd, &st) < 0)
|
|
return log_error_errno(errno, "Failed to stat %s: %m", de->d_name);
|
|
|
|
if (S_ISSOCK(st.st_mode) && st.st_dev == st_dev && st.st_ino == st_ino) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
/* No file descriptor? Then let's delete the state file */
|
|
log_debug("Cannot restore stream file %s", de->d_name);
|
|
if (unlinkat(dirfd(d), de->d_name, 0) < 0)
|
|
log_warning_errno(errno, "Failed to remove %s/%s: %m", path, de->d_name);
|
|
continue;
|
|
}
|
|
|
|
fdset_remove(fds, fd);
|
|
|
|
r = stdout_stream_restore(s, de->d_name, fd);
|
|
if (r < 0)
|
|
safe_close(fd);
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
return log_error_errno(errno, "Failed to read streams directory: %m");
|
|
}
|
|
|
|
int server_open_stdout_socket(Server *s, const char *stdout_socket) {
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(stdout_socket);
|
|
|
|
if (s->stdout_fd < 0) {
|
|
union sockaddr_union sa;
|
|
socklen_t sa_len;
|
|
|
|
r = sockaddr_un_set_path(&sa.un, stdout_socket);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Unable to use namespace path %s for AF_UNIX socket: %m", stdout_socket);
|
|
sa_len = r;
|
|
|
|
s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
|
|
if (s->stdout_fd < 0)
|
|
return log_error_errno(errno, "socket() failed: %m");
|
|
|
|
(void) sockaddr_un_unlink(&sa.un);
|
|
|
|
r = bind(s->stdout_fd, &sa.sa, sa_len);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
|
|
|
|
(void) chmod(sa.un.sun_path, 0666);
|
|
|
|
if (listen(s->stdout_fd, SOMAXCONN) < 0)
|
|
return log_error_errno(errno, "listen(%s) failed: %m", sa.un.sun_path);
|
|
} else
|
|
(void) fd_nonblock(s->stdout_fd, true);
|
|
|
|
r = sd_event_add_io(s->event, &s->stdout_event_source, s->stdout_fd, EPOLLIN, stdout_stream_new, s);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to add stdout server fd to event source: %m");
|
|
|
|
r = sd_event_source_set_priority(s->stdout_event_source, SD_EVENT_PRIORITY_NORMAL+5);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to adjust priority of stdout server event source: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
void stdout_stream_send_notify(StdoutStream *s) {
|
|
struct iovec iovec = {
|
|
.iov_base = (char*) "FDSTORE=1",
|
|
.iov_len = STRLEN("FDSTORE=1"),
|
|
};
|
|
struct msghdr msghdr = {
|
|
.msg_iov = &iovec,
|
|
.msg_iovlen = 1,
|
|
};
|
|
struct cmsghdr *cmsg;
|
|
ssize_t l;
|
|
|
|
assert(s);
|
|
assert(!s->fdstore);
|
|
assert(s->in_notify_queue);
|
|
assert(s->server);
|
|
assert(s->server->notify_fd >= 0);
|
|
|
|
/* Store the connection fd in PID 1, so that we get it passed
|
|
* in again on next start */
|
|
|
|
msghdr.msg_controllen = CMSG_SPACE(sizeof(int));
|
|
msghdr.msg_control = alloca0(msghdr.msg_controllen);
|
|
|
|
cmsg = CMSG_FIRSTHDR(&msghdr);
|
|
cmsg->cmsg_level = SOL_SOCKET;
|
|
cmsg->cmsg_type = SCM_RIGHTS;
|
|
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
|
|
|
|
memcpy(CMSG_DATA(cmsg), &s->fd, sizeof(int));
|
|
|
|
l = sendmsg(s->server->notify_fd, &msghdr, MSG_DONTWAIT|MSG_NOSIGNAL);
|
|
if (l < 0) {
|
|
if (errno == EAGAIN)
|
|
return;
|
|
|
|
log_error_errno(errno, "Failed to send stream file descriptor to service manager: %m");
|
|
} else {
|
|
log_debug("Successfully sent stream file descriptor to service manager.");
|
|
s->fdstore = 1;
|
|
}
|
|
|
|
LIST_REMOVE(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s);
|
|
s->in_notify_queue = false;
|
|
|
|
}
|