--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <errno.h>
+#include <stddef.h>
+
+#include "sd-journal.h"
+#include "util.h"
+
+/* We open a single fd, and we'll share it with the current process,
+ * all its threads, and all its subprocesses. This means we need to
+ * initialize it atomically, and need to operate on it atomically
+ * never assuming we are the only user */
+
+static int journal_fd(void) {
+ int fd;
+ static int fd_plus_one = 0;
+
+retry:
+ if (fd_plus_one > 0)
+ return fd_plus_one - 1;
+
+ fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (fd < 0)
+ return -errno;
+
+ if (!__sync_bool_compare_and_swap(&fd_plus_one, 0, fd+1)) {
+ close_nointr_nofail(fd);
+ goto retry;
+ }
+
+ return fd;
+}
+
+int sd_journal_print(const char *format, ...) {
+ int r;
+ va_list ap;
+
+ va_start(ap, format);
+ r = sd_journal_printv(format, ap);
+ va_end(ap);
+
+ return r;
+}
+
+int sd_journal_printv(const char *format, va_list ap) {
+ char buffer[8 + LINE_MAX];
+ struct iovec iov;
+
+ memcpy(buffer, "MESSAGE=", 8);
+ vsnprintf(buffer+8, sizeof(buffer) - 8, format, ap);
+
+ char_array_0(buffer);
+
+ zero(iov);
+ IOVEC_SET_STRING(iov, buffer);
+
+ return sd_journal_sendv(&iov, 1);
+}
+
+int sd_journal_send(const char *format, ...) {
+ int r, n = 0, i = 0, j;
+ va_list ap;
+ struct iovec *iov = NULL;
+
+ va_start(ap, format);
+ while (format) {
+ struct iovec *c;
+ char *buffer;
+
+ if (i >= n) {
+ n = MAX(i*2, 4);
+ c = realloc(iov, n * sizeof(struct iovec));
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ iov = c;
+ }
+
+ if (vasprintf(&buffer, format, ap) < 0) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ IOVEC_SET_STRING(iov[i++], buffer);
+
+ format = va_arg(ap, char *);
+ }
+ va_end(ap);
+
+ r = sd_journal_sendv(iov, i);
+
+fail:
+ for (j = 0; j < i; j++)
+ free(iov[j].iov_base);
+
+ free(iov);
+
+ return r;
+}
+
+int sd_journal_sendv(const struct iovec *iov, int n) {
+ int fd;
+ struct iovec *w;
+ uint64_t *l;
+ int i, j = 0;
+ struct msghdr mh;
+ struct sockaddr_un sa;
+
+ if (!iov || n <= 0)
+ return -EINVAL;
+
+ w = alloca(sizeof(struct iovec) * n * 5);
+ l = alloca(sizeof(uint64_t) * n);
+
+ for (i = 0; i < n; i++) {
+ char *c, *nl;
+
+ c = memchr(iov[i].iov_base, '=', iov[i].iov_len);
+ if (!c)
+ return -EINVAL;
+
+ nl = memchr(iov[i].iov_base, '\n', iov[i].iov_len);
+ if (nl) {
+ if (nl < c)
+ return -EINVAL;
+
+ /* Already includes a newline? Bummer, then
+ * let's write the variable name, then a
+ * newline, then the size (64bit LE), followed
+ * by the data and a final newline */
+
+ w[j].iov_base = iov[i].iov_base;
+ w[j].iov_len = c - (char*) iov[i].iov_base;
+ j++;
+
+ IOVEC_SET_STRING(w[j++], "\n");
+
+ l[i] = htole64(iov[i].iov_len - (c - (char*) iov[i].iov_base) - 1);
+ w[j].iov_base = &l[i];
+ w[j].iov_len = sizeof(uint64_t);
+ j++;
+
+ w[j].iov_base = c + 1;
+ w[j].iov_len = iov[i].iov_len - (c - (char*) iov[i].iov_base) - 1;
+ j++;
+
+ } else
+ /* Nothing special? Then just add the line and
+ * append a newline */
+ w[j++] = iov[i];
+
+ IOVEC_SET_STRING(w[j++], "\n");
+ }
+
+ fd = journal_fd();
+ if (fd < 0)
+ return fd;
+
+ zero(sa);
+ sa.sun_family = AF_UNIX;
+ strncpy(sa.sun_path,"/run/systemd/journal", sizeof(sa.sun_path));
+
+ zero(mh);
+ mh.msg_name = &sa;
+ mh.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(sa.sun_path);
+ mh.msg_iov = w;
+ mh.msg_iovlen = j;
+
+ if (sendmsg(fd, &mh, MSG_NOSIGNAL) < 0)
+ return -errno;
+
+ return 0;
+}
#include <fcntl.h>
#include <sys/acl.h>
#include <acl/libacl.h>
+#include <stddef.h>
+#include <sys/ioctl.h>
+#include <linux/sockios.h>
#include "hashmap.h"
#include "journal-file.h"
#include "cgroup-util.h"
typedef struct Server {
- int syslog_fd;
int epoll_fd;
int signal_fd;
+ int syslog_fd;
+ int native_fd;
JournalFile *runtime_journal;
JournalFile *system_journal;
Hashmap *user_journals;
uint64_t seqnum;
+
+ char *buffer;
+ size_t buffer_size;
} Server;
static void fix_perms(JournalFile *f, uid_t uid) {
return f;
}
-static void process_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
- char *message = NULL, *pid = NULL, *uid = NULL, *gid = NULL,
+static void dispatch_message(Server *s, struct iovec *iovec, unsigned n, unsigned m, struct ucred *ucred, struct timeval *tv) {
+ char *pid = NULL, *uid = NULL, *gid = NULL,
*source_time = NULL, *boot_id = NULL, *machine_id = NULL,
*comm = NULL, *cmdline = NULL, *hostname = NULL,
*audit_session = NULL, *audit_loginuid = NULL,
- *syslog_priority = NULL, *syslog_facility = NULL,
*exe = NULL, *cgroup = NULL;
- struct iovec iovec[17];
- unsigned n = 0;
+
char idbuf[33];
sd_id128_t id;
int r;
char *t;
- int priority = LOG_USER | LOG_INFO;
uid_t loginuid = 0, realuid = 0;
JournalFile *f;
- parse_syslog_priority((char**) &buf, &priority);
- skip_syslog_date((char**) &buf);
-
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
+ assert(s);
+ assert(iovec || n == 0);
- if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_facility);
+ if (n == 0)
+ return;
- message = strappend("MESSAGE=", buf);
- if (message)
- IOVEC_SET_STRING(iovec[n++], message);
+ assert(n + 13 <= m);
if (ucred) {
uint32_t session;
free(t);
}
+ assert(n <= m);
+
f = find_journal(s, realuid == 0 ? 0 : loginuid);
if (!f)
log_warning("Dropping message, as we can't find a place to store the data.");
log_error("Failed to write entry, ignoring: %s", strerror(-r));
}
- free(message);
free(pid);
free(uid);
free(gid);
free(hostname);
free(audit_session);
free(audit_loginuid);
+ free(cgroup);
+
+}
+
+static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
+ char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL;
+ struct iovec iovec[16];
+ unsigned n = 0;
+ int priority = LOG_USER | LOG_INFO;
+
+ assert(s);
+ assert(buf);
+
+ parse_syslog_priority((char**) &buf, &priority);
+ skip_syslog_date((char**) &buf);
+
+ if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
+
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+
+ message = strappend("MESSAGE=", buf);
+ if (message)
+ IOVEC_SET_STRING(iovec[n++], message);
+
+ dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv);
+
+ free(message);
free(syslog_facility);
free(syslog_priority);
- free(cgroup);
+}
+
+static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
+ struct iovec *iovec = NULL;
+ unsigned n = 0, m = 0, j;
+ const char *p;
+ size_t remaining;
+
+ assert(s);
+ assert(buffer || n == 0);
+
+ p = buffer;
+ remaining = buffer_size;
+
+ while (remaining > 0) {
+ const char *e, *q;
+
+ e = memchr(p, '\n', remaining);
+
+ if (!e) {
+ /* Trailing noise, let's ignore it, and flush what we collected */
+ log_debug("Received message with trailing noise, ignoring.");
+ break;
+ }
+
+ if (e == p) {
+ /* Entry separator */
+ dispatch_message(s, iovec, n, m, ucred, tv);
+ n = 0;
+
+ p++;
+ remaining--;
+ continue;
+ }
+
+ if (*p == '.') {
+ /* Control command, ignore for now */
+ remaining -= (e - p) + 1;
+ p = e + 1;
+ continue;
+ }
+
+ /* A property follows */
+
+ if (n+13 >= m) {
+ struct iovec *c;
+ unsigned u;
+
+ u = MAX((n+13U) * 2U, 4U);
+ c = realloc(iovec, u * sizeof(struct iovec));
+ if (!c) {
+ log_error("Out of memory");
+ break;
+ }
+
+ iovec = c;
+ m = u;
+ }
+
+ q = memchr(p, '=', e - p);
+ if (q) {
+ iovec[n].iov_base = (char*) p;
+ iovec[n].iov_len = e - p;
+ n++;
+
+ remaining -= (e - p) + 1;
+ p = e + 1;
+ continue;
+ } else {
+ uint64_t l;
+ char *k;
+
+ if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
+ log_debug("Failed to parse message, ignoring.");
+ break;
+ }
+
+ memcpy(&l, e + 1, sizeof(uint64_t));
+ l = le64toh(l);
+
+ if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
+ e[1+sizeof(uint64_t)+l] != '\n') {
+ log_debug("Failed to parse message, ignoring.");
+ break;
+ }
+
+ k = malloc((e - p) + 1 + l);
+ if (!k) {
+ log_error("Out of memory");
+ break;
+ }
+
+ memcpy(k, p, e - p);
+ k[e - p] = '=';
+ memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
+
+ iovec[n].iov_base = k;
+ iovec[n].iov_len = (e - p) + 1 + l;
+ n++;
+
+ remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
+ p = e + 1 + sizeof(uint64_t) + l + 1;
+ }
+ }
+
+ dispatch_message(s, iovec, n, m, ucred, tv);
+
+ for (j = 0; j < n; j++)
+ if (iovec[j].iov_base < buffer ||
+ (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
+ free(iovec[j].iov_base);
}
static int process_event(Server *s, struct epoll_event *ev) {
}
- if (ev->data.fd == s->syslog_fd) {
+ if (ev->data.fd == s->native_fd ||
+ ev->data.fd == s->syslog_fd) {
for (;;) {
- char buf[LINE_MAX+1];
struct msghdr msghdr;
struct iovec iovec;
struct ucred *ucred = NULL;
CMSG_SPACE(sizeof(struct timeval))];
} control;
ssize_t n;
- char *e;
+ int v;
+
+ if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
+ log_error("SIOCINQ failed: %m");
+ return -errno;
+ }
+
+ if (v <= 0)
+ return 1;
+
+ if (s->buffer_size < (size_t) v) {
+ void *b;
+ size_t l;
+
+ l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
+ b = realloc(s->buffer, l+1);
+
+ if (!b) {
+ log_error("Couldn't increase buffer.");
+ return -ENOMEM;
+ }
+
+ s->buffer_size = l;
+ s->buffer = b;
+ }
zero(iovec);
- iovec.iov_base = buf;
- iovec.iov_len = sizeof(buf)-1;
+ iovec.iov_base = s->buffer;
+ iovec.iov_len = s->buffer_size;
zero(control);
zero(msghdr);
tv = (struct timeval*) CMSG_DATA(cmsg);
}
- e = memchr(buf, '\n', n);
- if (e)
- *e = 0;
- else
- buf[n] = 0;
+ if (ev->data.fd == s->syslog_fd) {
+ char *e;
- process_message(s, strstrip(buf), ucred, tv);
+ e = memchr(s->buffer, '\n', n);
+ if (e)
+ *e = 0;
+ else
+ s->buffer[n] = 0;
+
+ process_syslog_message(s, strstrip(s->buffer), ucred, tv);
+ } else
+ process_native_message(s, s->buffer, n, ucred, tv);
}
return 1;
return r;
}
-static int server_init(Server *s) {
- int n, one, r;
- struct epoll_event ev;
- sigset_t mask;
+static int open_syslog_socket(Server *s) {
+ union sockaddr_union sa;
+ int one, r;
assert(s);
- zero(*s);
- s->syslog_fd = s->signal_fd = -1;
+ if (s->syslog_fd < 0) {
- s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
- if (s->epoll_fd < 0) {
- log_error("Failed to create epoll object: %m");
- return -errno;
+ s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (s->syslog_fd < 0) {
+ log_error("socket() failed: %m");
+ return -errno;
+ }
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
+
+ unlink(sa.un.sun_path);
+
+ r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ if (r < 0) {
+ log_error("bind() failed: %m");
+ return -errno;
+ }
+
+ chmod(sa.un.sun_path, 0666);
}
- n = sd_listen_fds(true);
- if (n < 0) {
- log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
- return n;
+ one = 1;
+ r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+ if (r < 0) {
+ log_error("SO_PASSCRED failed: %m");
+ return -errno;
}
- if (n > 1) {
- log_error("Too many file descriptors passed.");
- return -EINVAL;
+ one = 1;
+ r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
+ if (r < 0) {
+ log_error("SO_TIMESTAMP failed: %m");
+ return -errno;
}
- if (n == 1)
- s->syslog_fd = SD_LISTEN_FDS_START;
- else {
- union sockaddr_union sa;
+ return 0;
+}
- s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (s->syslog_fd < 0) {
+static int open_native_socket(Server*s) {
+ union sockaddr_union sa;
+ int one, r;
+
+ assert(s);
+
+ if (s->native_fd < 0) {
+
+ s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (s->native_fd < 0) {
log_error("socket() failed: %m");
return -errno;
}
zero(sa);
sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
+ strncpy(sa.un.sun_path, "/run/systemd/journal", sizeof(sa.un.sun_path));
unlink(sa.un.sun_path);
- r = bind(s->syslog_fd, &sa.sa, sizeof(sa.un));
+ r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
if (r < 0) {
log_error("bind() failed: %m");
return -errno;
}
one = 1;
- r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+ r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
if (r < 0) {
log_error("SO_PASSCRED failed: %m");
return -errno;
}
one = 1;
- r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
+ r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
if (r < 0) {
log_error("SO_TIMESTAMP failed: %m");
return -errno;
}
+ return 0;
+}
+
+static int server_init(Server *s) {
+ int n, r, fd;
+ struct epoll_event ev;
+ sigset_t mask;
+
+ assert(s);
+
+ zero(*s);
+ s->syslog_fd = s->native_fd = s->signal_fd = -1;
+
+ s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+ if (s->epoll_fd < 0) {
+ log_error("Failed to create epoll object: %m");
+ return -errno;
+ }
+
+ n = sd_listen_fds(true);
+ if (n < 0) {
+ log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
+ return n;
+ }
+
+ for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
+
+ if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) {
+
+ if (s->syslog_fd >= 0) {
+ log_error("Too many /dev/log sockets passed.");
+ return -EINVAL;
+ }
+
+ s->syslog_fd = fd;
+
+ } else if (sd_is_socket(fd, AF_UNIX, SOCK_DGRAM, -1) > 0) {
+
+ if (s->native_fd >= 0) {
+ log_error("Too many native sockets passed.");
+ return -EINVAL;
+ }
+
+ s->native_fd = fd;
+ } else {
+ log_error("Unknown socket passed.");
+ return -EINVAL;
+ }
+ }
+
+ r = open_syslog_socket(s);
+ if (r < 0)
+ return r;
+
zero(ev);
ev.events = EPOLLIN;
ev.data.fd = s->syslog_fd;
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) {
- log_error("Failed to add server fd to epoll object: %m");
+ log_error("Failed to add syslog server fd to epoll object: %m");
+ return -errno;
+ }
+
+ r = open_native_socket(s);
+ if (r < 0)
+ return r;
+
+ zero(ev);
+ ev.events = EPOLLIN;
+ ev.data.fd = s->native_fd;
+ if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) {
+ log_error("Failed to add native server fd to epoll object: %m");
return -errno;
}
if (s->syslog_fd >= 0)
close_nointr_nofail(s->syslog_fd);
+
+ if (s->native_fd >= 0)
+ close_nointr_nofail(s->native_fd);
}
int main(int argc, char *argv[]) {
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