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authorLennart Poettering <lennart@poettering.net>2012-01-12 04:34:31 +0100
committerLennart Poettering <lennart@poettering.net>2012-01-12 04:34:31 +0100
commit5ba081b0fb02380cee4c2ff5bc7e05f869eb8415 (patch)
tree88c9c73d7b1f605bf984c6875d4099adc5e9875e /src
parent8a0f04e6a283cc6734ee09a20305c13e09ba0418 (diff)
log: make internal log api log directly to the journal
Diffstat (limited to 'src')
-rw-r--r--src/journal/journal-send.c2
-rw-r--r--src/log.c189
-rw-r--r--src/log.h7
3 files changed, 163 insertions, 35 deletions
diff --git a/src/journal/journal-send.c b/src/journal/journal-send.c
index ddf503b18d..d51aec9690 100644
--- a/src/journal/journal-send.c
+++ b/src/journal/journal-send.c
@@ -195,7 +195,7 @@ _public_ int sd_journal_sendv(const struct iovec *iov, int n) {
zero(sa);
sa.sun_family = AF_UNIX;
- strncpy(sa.sun_path,"/run/systemd/journal/socket", sizeof(sa.sun_path));
+ strncpy(sa.sun_path, "/run/systemd/journal/socket", sizeof(sa.sun_path));
zero(mh);
mh.msg_name = &sa;
diff --git a/src/log.c b/src/log.c
index 3dfe65432b..6caa5fad0b 100644
--- a/src/log.c
+++ b/src/log.c
@@ -26,12 +26,14 @@
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/un.h>
+#include <stddef.h>
#include "log.h"
#include "util.h"
#include "macro.h"
+#include "socket-util.h"
-#define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC)
+#define SOCKET_TIMEOUT_USEC (5*USEC_PER_SEC)
static LogTarget log_target = LOG_TARGET_CONSOLE;
static int log_max_level = LOG_INFO;
@@ -39,6 +41,7 @@ static int log_max_level = LOG_INFO;
static int console_fd = STDERR_FILENO;
static int syslog_fd = -1;
static int kmsg_fd = -1;
+static int journal_fd = -1;
static bool syslog_is_stream = false;
@@ -69,7 +72,8 @@ static int log_open_console(void) {
if (getpid() == 1) {
- if ((console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
+ console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
+ if (console_fd < 0) {
log_error("Failed to open /dev/console for logging: %s", strerror(-console_fd));
return console_fd;
}
@@ -122,12 +126,14 @@ static int create_log_socket(int type) {
if (getpid() == 1)
/* systemd should not block on syslog */
type |= SOCK_NONBLOCK;
- if ((fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0)) < 0)
+
+ fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0);
+ if (fd < 0)
return -errno;
/* Make sure we don't block for more than 5s when talking to
* syslog */
- timeval_store(&tv, SYSLOG_TIMEOUT_USEC);
+ timeval_store(&tv, SOCKET_TIMEOUT_USEC);
if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) {
close_nointr_nofail(fd);
return -errno;
@@ -137,10 +143,7 @@ static int create_log_socket(int type) {
}
static int log_open_syslog(void) {
- union {
- struct sockaddr sa;
- struct sockaddr_un un;
- } sa;
+ union sockaddr_union sa;
int r;
if (syslog_fd >= 0)
@@ -150,8 +153,9 @@ static int log_open_syslog(void) {
sa.un.sun_family = AF_UNIX;
strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path));
- if ((syslog_fd = create_log_socket(SOCK_DGRAM)) < 0) {
- r = -errno;
+ syslog_fd = create_log_socket(SOCK_DGRAM);
+ if (syslog_fd < 0) {
+ r = syslog_fd;
goto fail;
}
@@ -161,8 +165,9 @@ static int log_open_syslog(void) {
/* Some legacy syslog systems still use stream
* sockets. They really shouldn't. But what can we
* do... */
- if ((syslog_fd = create_log_socket(SOCK_STREAM)) < 0) {
- r = -errno;
+ syslog_fd = create_log_socket(SOCK_STREAM);
+ if (syslog_fd < 0) {
+ r = syslog_fd;
goto fail;
}
@@ -185,6 +190,47 @@ fail:
return r;
}
+void log_close_journal(void) {
+
+ if (journal_fd < 0)
+ return;
+
+ close_nointr_nofail(journal_fd);
+ journal_fd = -1;
+}
+
+static int log_open_journal(void) {
+ union sockaddr_union sa;
+ int r;
+
+ if (journal_fd >= 0)
+ return 0;
+
+ journal_fd = create_log_socket(SOCK_DGRAM);
+ if (journal_fd < 0) {
+ r = journal_fd;
+ goto fail;
+ }
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, "/run/systemd/journal/socket", sizeof(sa.un.sun_path));
+
+ if (connect(journal_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ log_debug("Successfully opened journal for logging.");
+
+ return 0;
+
+fail:
+ log_close_journal();
+ log_debug("Failed to open journal for logging: %s", strerror(-r));
+ return r;
+}
+
int log_open(void) {
int r;
@@ -195,6 +241,7 @@ int log_open(void) {
* because there is no reason to close it. */
if (log_target == LOG_TARGET_NULL) {
+ log_close_journal();
log_close_syslog();
log_close_console();
return 0;
@@ -205,22 +252,41 @@ int log_open(void) {
isatty(STDERR_FILENO) <= 0) {
if (log_target == LOG_TARGET_AUTO ||
- log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
- log_target == LOG_TARGET_SYSLOG)
- if ((r = log_open_syslog()) >= 0) {
+ log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
+ log_target == LOG_TARGET_JOURNAL) {
+ r = log_open_journal();
+ if (r >= 0) {
+ log_close_syslog();
log_close_console();
return r;
}
+ }
+
+ if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
+ log_target == LOG_TARGET_SYSLOG) {
+ r = log_open_syslog();
+ if (r >= 0) {
+ log_close_journal();
+ log_close_console();
+ return r;
+ }
+ }
+
if (log_target == LOG_TARGET_AUTO ||
+ log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
- log_target == LOG_TARGET_KMSG)
- if ((r = log_open_kmsg()) >= 0) {
+ log_target == LOG_TARGET_KMSG) {
+ r = log_open_kmsg();
+ if (r >= 0) {
+ log_close_journal();
log_close_syslog();
log_close_console();
return r;
}
+ }
}
+ log_close_journal();
log_close_syslog();
/* Get the real /dev/console if we are PID=1, hence reopen */
@@ -236,13 +302,14 @@ void log_set_target(LogTarget target) {
}
void log_close(void) {
- log_close_console();
- log_close_kmsg();
+ log_close_journal();
log_close_syslog();
+ log_close_kmsg();
+ log_close_console();
}
void log_forget_fds(void) {
- console_fd = kmsg_fd = syslog_fd = -1;
+ console_fd = kmsg_fd = syslog_fd = journal_fd = -1;
}
void log_set_max_level(int level) {
@@ -382,6 +449,48 @@ static int write_to_kmsg(
return 1;
}
+static int write_to_journal(
+ int level,
+ const char*file,
+ int line,
+ const char *func,
+ const char *buffer) {
+
+ char header[LINE_MAX];
+ struct iovec iovec[3];
+ struct msghdr mh;
+
+ if (journal_fd < 0)
+ return 0;
+
+ snprintf(header, sizeof(header),
+ "PRIORITY=%i\n"
+ "CODE_FILE=%s\n"
+ "CODE_LINE=%i\n"
+ "CODE_FUNCTION=%s\n"
+ "MESSAGE=",
+ LOG_PRI(level),
+ file,
+ line,
+ func);
+
+ char_array_0(header);
+
+ zero(iovec);
+ IOVEC_SET_STRING(iovec[0], header);
+ IOVEC_SET_STRING(iovec[1], buffer);
+ IOVEC_SET_STRING(iovec[2], "\n");
+
+ zero(mh);
+ mh.msg_iov = iovec;
+ mh.msg_iovlen = ELEMENTSOF(iovec);
+
+ if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0)
+ return -errno;
+
+ return 1;
+}
+
static int log_dispatch(
int level,
const char*file,
@@ -411,7 +520,19 @@ static int log_dispatch(
*(e++) = 0;
if (log_target == LOG_TARGET_AUTO ||
- log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
+ log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
+ log_target == LOG_TARGET_JOURNAL) {
+
+ k = write_to_journal(level, file, line, func, buffer);
+ if (k < 0) {
+ if (k != -EAGAIN)
+ log_close_journal();
+ log_open_kmsg();
+ } else if (k > 0)
+ r++;
+ }
+
+ if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_SYSLOG) {
k = write_to_syslog(level, file, line, func, buffer);
@@ -524,7 +645,8 @@ void log_assert(
int log_set_target_from_string(const char *e) {
LogTarget t;
- if ((t = log_target_from_string(e)) < 0)
+ t = log_target_from_string(e);
+ if (t < 0)
return -EINVAL;
log_set_target(t);
@@ -534,8 +656,9 @@ int log_set_target_from_string(const char *e) {
int log_set_max_level_from_string(const char *e) {
int t;
- if ((t = log_level_from_string(e)) < 0)
- return -EINVAL;
+ t = log_level_from_string(e);
+ if (t < 0)
+ return t;
log_set_max_level(t);
return 0;
@@ -580,8 +703,9 @@ void log_show_location(bool b) {
int log_show_color_from_string(const char *e) {
int t;
- if ((t = parse_boolean(e)) < 0)
- return -EINVAL;
+ t = parse_boolean(e);
+ if (t < 0)
+ return t;
log_show_color(t);
return 0;
@@ -590,8 +714,9 @@ int log_show_color_from_string(const char *e) {
int log_show_location_from_string(const char *e) {
int t;
- if ((t = parse_boolean(e)) < 0)
- return -EINVAL;
+ t = parse_boolean(e);
+ if (t < 0)
+ return t;
log_show_location(t);
return 0;
@@ -599,11 +724,13 @@ int log_show_location_from_string(const char *e) {
static const char *const log_target_table[] = {
[LOG_TARGET_CONSOLE] = "console",
- [LOG_TARGET_SYSLOG] = "syslog",
[LOG_TARGET_KMSG] = "kmsg",
+ [LOG_TARGET_JOURNAL] = "journal",
+ [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg",
+ [LOG_TARGET_SYSLOG] = "syslog",
[LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg",
- [LOG_TARGET_NULL] = "null",
- [LOG_TARGET_AUTO] = "auto"
+ [LOG_TARGET_AUTO] = "auto",
+ [LOG_TARGET_NULL] = "null"
};
DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);
diff --git a/src/log.h b/src/log.h
index 9942e3e9a0..6ab07a5422 100644
--- a/src/log.h
+++ b/src/log.h
@@ -27,14 +27,14 @@
#include "macro.h"
-/* If set to SYSLOG and /dev/log can not be opened we fall back to
- * KSMG. If KMSG fails, we fall back to CONSOLE */
typedef enum LogTarget{
LOG_TARGET_CONSOLE,
LOG_TARGET_KMSG,
+ LOG_TARGET_JOURNAL,
+ LOG_TARGET_JOURNAL_OR_KMSG,
LOG_TARGET_SYSLOG,
LOG_TARGET_SYSLOG_OR_KMSG,
- LOG_TARGET_AUTO, /* console if stderr is tty, SYSLOG_OR_KMSG otherwise */
+ LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
LOG_TARGET_NULL,
_LOG_TARGET_MAX,
_LOG_TARGET_INVALID = -1
@@ -60,6 +60,7 @@ void log_close(void);
void log_forget_fds(void);
void log_close_syslog(void);
+void log_close_journal(void);
void log_close_kmsg(void);
void log_close_console(void);