#include <sys/socket.h>
#include <sys/un.h>
#include <stddef.h>
+#include <printf.h>
#include "log.h"
#include "util.h"
+#include "missing.h"
#include "macro.h"
#include "socket-util.h"
return 0;
if (getpid() == 1) {
-
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));
+ if (console_fd < 0)
return console_fd;
- }
-
- log_debug("Successfully opened /dev/console for logging.");
} else
console_fd = STDERR_FILENO;
return 0;
kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
- if (kmsg_fd < 0) {
- log_error("Failed to open /dev/kmsg for logging: %s", strerror(errno));
+ if (kmsg_fd < 0)
return -errno;
- }
-
- log_debug("Successfully opened /dev/kmsg for logging.");
return 0;
}
static int create_log_socket(int type) {
int fd;
+ struct timeval tv;
- /* All output to the syslog/journal fds we do asynchronously,
- * and if the buffers are full we just drop the messages */
-
- fd = socket(AF_UNIX, type|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0);
if (fd < 0)
return -errno;
fd_inc_sndbuf(fd, SNDBUF_SIZE);
+ /* We need a blocking fd here since we'd otherwise lose
+ messages way too early. However, let's not hang forever in the
+ unlikely case of a deadlock. */
+ if (getpid() == 1)
+ timeval_store(&tv, 10 * USEC_PER_MSEC);
+ else
+ timeval_store(&tv, 10 * USEC_PER_SEC);
+ setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
+
return fd;
}
static int log_open_syslog(void) {
- union sockaddr_union sa;
int r;
+ union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/dev/log",
+ };
if (syslog_fd >= 0)
return 0;
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path));
-
syslog_fd = create_log_socket(SOCK_DGRAM);
if (syslog_fd < 0) {
r = syslog_fd;
} else
syslog_is_stream = false;
- log_debug("Successfully opened syslog for logging.");
-
return 0;
fail:
log_close_syslog();
- log_debug("Failed to open syslog for logging: %s", strerror(-r));
return r;
}
}
static int log_open_journal(void) {
- union sockaddr_union sa;
+ union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/socket",
+ };
int r;
if (journal_fd >= 0)
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;
}
return 0;
}
- if (log_target != LOG_TARGET_AUTO ||
+ if ((log_target != LOG_TARGET_AUTO && log_target != LOG_TARGET_SAFE) ||
getpid() == 1 ||
isatty(STDERR_FILENO) <= 0) {
}
if (log_target == LOG_TARGET_AUTO ||
+ log_target == LOG_TARGET_SAFE ||
log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_KMSG) {
log_close_journal();
log_close_syslog();
- /* Get the real /dev/console if we are PID=1, hence reopen */
- log_close_console();
return log_open_console();
}
const char*file,
int line,
const char *func,
+ const char *object_name,
+ const char *object,
const char *buffer) {
char location[64];
- struct iovec iovec[5];
+ struct iovec iovec[5] = {};
unsigned n = 0;
bool highlight;
highlight = LOG_PRI(level) <= LOG_ERR && show_color;
- zero(iovec);
-
if (show_location) {
snprintf(location, sizeof(location), "(%s:%u) ", file, line);
char_array_0(location);
IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_OFF);
IOVEC_SET_STRING(iovec[n++], "\n");
- if (writev(console_fd, iovec, n) < 0)
- return -errno;
+ if (writev(console_fd, iovec, n) < 0) {
+
+ if (errno == EIO && getpid() == 1) {
+
+ /* If somebody tried to kick us from our
+ * console tty (via vhangup() or suchlike),
+ * try to reconnect */
+
+ log_close_console();
+ log_open_console();
+
+ if (console_fd < 0)
+ return 0;
+
+ if (writev(console_fd, iovec, n) < 0)
+ return -errno;
+ } else
+ return -errno;
+ }
return 1;
}
const char*file,
int line,
const char *func,
+ const char *object_name,
+ const char *object,
const char *buffer) {
char header_priority[16], header_time[64], header_pid[16];
- struct iovec iovec[5];
- struct msghdr msghdr;
+ struct iovec iovec[5] = {};
+ struct msghdr msghdr = {
+ .msg_iov = iovec,
+ .msg_iovlen = ELEMENTSOF(iovec),
+ };
time_t t;
struct tm *tm;
char_array_0(header_priority);
t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC);
- if (!(tm = localtime(&t)))
+ tm = localtime(&t);
+ if (!tm)
return -EINVAL;
if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) getpid());
char_array_0(header_pid);
- zero(iovec);
IOVEC_SET_STRING(iovec[0], header_priority);
IOVEC_SET_STRING(iovec[1], header_time);
IOVEC_SET_STRING(iovec[2], program_invocation_short_name);
if (syslog_is_stream)
iovec[4].iov_len++;
- zero(msghdr);
- msghdr.msg_iov = iovec;
- msghdr.msg_iovlen = ELEMENTSOF(iovec);
-
for (;;) {
ssize_t n;
const char*file,
int line,
const char *func,
+ const char *object_name,
+ const char *object,
const char *buffer) {
char header_priority[16], header_pid[16];
- struct iovec iovec[5];
+ struct iovec iovec[5] = {};
if (kmsg_fd < 0)
return 0;
snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) getpid());
char_array_0(header_pid);
- zero(iovec);
IOVEC_SET_STRING(iovec[0], header_priority);
IOVEC_SET_STRING(iovec[1], program_invocation_short_name);
IOVEC_SET_STRING(iovec[2], header_pid);
return 1;
}
+static int log_do_header(char *header, size_t size,
+ int level,
+ const char *file, int line, const char *func,
+ const char *object_name, const char *object) {
+ snprintf(header, size,
+ "PRIORITY=%i\n"
+ "SYSLOG_FACILITY=%i\n"
+ "%s%.*s%s"
+ "%s%.*i%s"
+ "%s%.*s%s"
+ "%s%.*s%s"
+ "SYSLOG_IDENTIFIER=%s\n",
+ LOG_PRI(level),
+ LOG_FAC(level),
+ file ? "CODE_FILE=" : "",
+ file ? LINE_MAX : 0, file, /* %.0s means no output */
+ file ? "\n" : "",
+ line ? "CODE_LINE=" : "",
+ line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */
+ line ? "\n" : "",
+ func ? "CODE_FUNCTION=" : "",
+ func ? LINE_MAX : 0, func,
+ func ? "\n" : "",
+ object ? object_name : "",
+ object ? LINE_MAX : 0, object, /* %.0s means no output */
+ object ? "\n" : "",
+ program_invocation_short_name);
+ header[size - 1] = '\0';
+ return 0;
+}
+
static int write_to_journal(
int level,
const char*file,
int line,
const char *func,
+ const char *object_name,
+ const char *object,
const char *buffer) {
char header[LINE_MAX];
- struct iovec iovec[3];
- struct msghdr mh;
+ struct iovec iovec[4] = {};
+ struct msghdr mh = {};
if (journal_fd < 0)
return 0;
- snprintf(header, sizeof(header),
- "PRIORITY=%i\n"
- "SYSLOG_FACILITY=%i\n"
- "CODE_FILE=%s\n"
- "CODE_LINE=%i\n"
- "CODE_FUNCTION=%s\n"
- "MESSAGE=",
- LOG_PRI(level),
- LOG_FAC(level),
- file,
- line,
- func);
-
- char_array_0(header);
+ log_do_header(header, sizeof(header), level,
+ file, line, func, object_name, object);
- zero(iovec);
IOVEC_SET_STRING(iovec[0], header);
- IOVEC_SET_STRING(iovec[1], buffer);
- IOVEC_SET_STRING(iovec[2], "\n");
+ IOVEC_SET_STRING(iovec[1], "MESSAGE=");
+ IOVEC_SET_STRING(iovec[2], buffer);
+ IOVEC_SET_STRING(iovec[3], "\n");
- zero(mh);
mh.msg_iov = iovec;
mh.msg_iovlen = ELEMENTSOF(iovec);
const char*file,
int line,
const char *func,
+ const char *object_name,
+ const char *object,
char *buffer) {
int r = 0;
log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
log_target == LOG_TARGET_JOURNAL) {
- k = write_to_journal(level, file, line, func, buffer);
+ k = write_to_journal(level, file, line, func,
+ object_name, object, buffer);
if (k < 0) {
if (k != -EAGAIN)
log_close_journal();
if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_SYSLOG) {
- k = write_to_syslog(level, file, line, func, buffer);
+ k = write_to_syslog(level, file, line, func,
+ object_name, object, buffer);
if (k < 0) {
if (k != -EAGAIN)
log_close_syslog();
if (k <= 0 &&
(log_target == LOG_TARGET_AUTO ||
+ log_target == LOG_TARGET_SAFE ||
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
log_target == LOG_TARGET_KMSG)) {
- k = write_to_kmsg(level, file, line, func, buffer);
+ k = write_to_kmsg(level, file, line, func,
+ object_name, object, buffer);
if (k < 0) {
log_close_kmsg();
log_open_console();
}
if (k <= 0) {
- k = write_to_console(level, file, line, func, buffer);
+ k = write_to_console(level, file, line, func,
+ object_name, object, buffer);
if (k < 0)
return k;
}
const char *func,
char *buffer) {
- int saved_errno, r;
+ PROTECT_ERRNO;
/* This modifies the buffer... */
if (_likely_(LOG_PRI(level) > log_max_level))
return 0;
- saved_errno = errno;
- r = log_dispatch(level, file, line, func, buffer);
- errno = saved_errno;
-
- return r;
+ return log_dispatch(level, file, line, func, NULL, NULL, buffer);
}
int log_metav(
const char *format,
va_list ap) {
+ PROTECT_ERRNO;
char buffer[LINE_MAX];
- int saved_errno, r;
if (_likely_(LOG_PRI(level) > log_max_level))
return 0;
- saved_errno = errno;
vsnprintf(buffer, sizeof(buffer), format, ap);
char_array_0(buffer);
- r = log_dispatch(level, file, line, func, buffer);
- errno = saved_errno;
-
- return r;
+ return log_dispatch(level, file, line, func, NULL, NULL, buffer);
}
int log_meta(
return r;
}
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wformat-nonliteral"
-_noreturn_ static void log_assert(const char *text, const char *file, int line, const char *func, const char *format) {
+int log_metav_object(
+ int level,
+ const char*file,
+ int line,
+ const char *func,
+ const char *object_name,
+ const char *object,
+ const char *format,
+ va_list ap) {
+
+ PROTECT_ERRNO;
+ char buffer[LINE_MAX];
+
+ if (_likely_(LOG_PRI(level) > log_max_level))
+ return 0;
+
+ vsnprintf(buffer, sizeof(buffer), format, ap);
+ char_array_0(buffer);
+
+ return log_dispatch(level, file, line, func,
+ object_name, object, buffer);
+}
+
+int log_meta_object(
+ int level,
+ const char*file,
+ int line,
+ const char *func,
+ const char *object_name,
+ const char *object,
+ const char *format, ...) {
+
+ int r;
+ va_list ap;
+
+ va_start(ap, format);
+ r = log_metav_object(level, file, line, func,
+ object_name, object, format, ap);
+ va_end(ap);
+
+ return r;
+}
+
+static void log_assert(int level, const char *text, const char *file, int line, const char *func, const char *format) {
static char buffer[LINE_MAX];
+ if (_likely_(LOG_PRI(level) > log_max_level))
+ return;
+
+ DISABLE_WARNING_FORMAT_NONLITERAL;
snprintf(buffer, sizeof(buffer), format, text, file, line, func);
+ REENABLE_WARNING;
char_array_0(buffer);
log_abort_msg = buffer;
- log_dispatch(LOG_CRIT, file, line, func, buffer);
+ log_dispatch(level, file, line, func, NULL, NULL, buffer);
+}
+
+noreturn void log_assert_failed(const char *text, const char *file, int line, const char *func) {
+ log_assert(LOG_CRIT, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Aborting.");
+ abort();
+}
+
+noreturn void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func) {
+ log_assert(LOG_CRIT, text, file, line, func, "Code should not be reached '%s' at %s:%u, function %s(). Aborting.");
abort();
}
-#pragma GCC diagnostic pop
-_noreturn_ void log_assert_failed(const char *text, const char *file, int line, const char *func) {
- log_assert(text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Aborting.");
+void log_assert_failed_return(const char *text, const char *file, int line, const char *func) {
+ PROTECT_ERRNO;
+ log_assert(LOG_DEBUG, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Ignoring.");
}
-_noreturn_ void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func) {
- log_assert(text, file, line, func, "Code should not be reached '%s' at %s:%u, function %s(). Aborting.");
+int log_oom_internal(const char *file, int line, const char *func) {
+ log_meta(LOG_ERR, file, line, func, "Out of memory.");
+ return -ENOMEM;
+}
+
+int log_struct_internal(
+ int level,
+ const char *file,
+ int line,
+ const char *func,
+ const char *format, ...) {
+
+ PROTECT_ERRNO;
+ va_list ap;
+ int r;
+
+ if (_likely_(LOG_PRI(level) > log_max_level))
+ return 0;
+
+ if (log_target == LOG_TARGET_NULL)
+ return 0;
+
+ if ((level & LOG_FACMASK) == 0)
+ level = log_facility | LOG_PRI(level);
+
+ if ((log_target == LOG_TARGET_AUTO ||
+ log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
+ log_target == LOG_TARGET_JOURNAL) &&
+ journal_fd >= 0) {
+
+ char header[LINE_MAX];
+ struct iovec iovec[17] = {};
+ unsigned n = 0, i;
+ struct msghdr mh = {
+ .msg_iov = iovec,
+ };
+ static const char nl = '\n';
+
+ /* If the journal is available do structured logging */
+ log_do_header(header, sizeof(header), level,
+ file, line, func, NULL, NULL);
+ IOVEC_SET_STRING(iovec[n++], header);
+
+ va_start(ap, format);
+ while (format && n + 1 < ELEMENTSOF(iovec)) {
+ char *buf;
+ va_list aq;
+
+ /* We need to copy the va_list structure,
+ * since vasprintf() leaves it afterwards at
+ * an undefined location */
+
+ va_copy(aq, ap);
+ if (vasprintf(&buf, format, aq) < 0) {
+ va_end(aq);
+ r = -ENOMEM;
+ goto finish;
+ }
+ va_end(aq);
+
+ /* Now, jump enough ahead, so that we point to
+ * the next format string */
+ VA_FORMAT_ADVANCE(format, ap);
+
+ IOVEC_SET_STRING(iovec[n++], buf);
+
+ iovec[n].iov_base = (char*) &nl;
+ iovec[n].iov_len = 1;
+ n++;
+
+ format = va_arg(ap, char *);
+ }
+
+ mh.msg_iovlen = n;
+
+ if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0)
+ r = -errno;
+ else
+ r = 1;
+
+ finish:
+ va_end(ap);
+ for (i = 1; i < n; i += 2)
+ free(iovec[i].iov_base);
+
+ } else {
+ char buf[LINE_MAX];
+ bool found = false;
+
+ /* Fallback if journal logging is not available */
+
+ va_start(ap, format);
+ while (format) {
+ va_list aq;
+
+ va_copy(aq, ap);
+ vsnprintf(buf, sizeof(buf), format, aq);
+ va_end(aq);
+ char_array_0(buf);
+
+ if (startswith(buf, "MESSAGE=")) {
+ found = true;
+ break;
+ }
+
+ VA_FORMAT_ADVANCE(format, ap);
+
+ format = va_arg(ap, char *);
+ }
+ va_end(ap);
+
+ if (found)
+ r = log_dispatch(level, file, line, func,
+ NULL, NULL, buf + 8);
+ else
+ r = -EINVAL;
+ }
+
+ return r;
}
int log_set_target_from_string(const char *e) {
}
void log_parse_environment(void) {
+ _cleanup_free_ char *line = NULL;
const char *e;
+ int r;
- if ((e = getenv("SYSTEMD_LOG_TARGET")))
- if (log_set_target_from_string(e) < 0)
- log_warning("Failed to parse log target %s. Ignoring.", e);
+ r = proc_cmdline(&line);
+ if (r < 0)
+ log_warning("Failed to read /proc/cmdline. Ignoring: %s", strerror(-r));
+ else if (r > 0) {
+ char *w, *state;
+ size_t l;
+
+ FOREACH_WORD_QUOTED(w, l, line, state) {
+ if (l == 5 && startswith(w, "debug")) {
+ log_set_max_level(LOG_DEBUG);
+ break;
+ }
+ }
+ }
- if ((e = getenv("SYSTEMD_LOG_LEVEL")))
- if (log_set_max_level_from_string(e) < 0)
- log_warning("Failed to parse log level %s. Ignoring.", e);
+ e = secure_getenv("SYSTEMD_LOG_TARGET");
+ if (e && log_set_target_from_string(e) < 0)
+ log_warning("Failed to parse log target %s. Ignoring.", e);
- if ((e = getenv("SYSTEMD_LOG_COLOR")))
- if (log_show_color_from_string(e) < 0)
- log_warning("Failed to parse bool %s. Ignoring.", e);
+ e = secure_getenv("SYSTEMD_LOG_LEVEL");
+ if (e && log_set_max_level_from_string(e) < 0)
+ log_warning("Failed to parse log level %s. Ignoring.", e);
- if ((e = getenv("SYSTEMD_LOG_LOCATION")))
- if (log_show_location_from_string(e) < 0)
- log_warning("Failed to parse bool %s. Ignoring.", e);
+ e = secure_getenv("SYSTEMD_LOG_COLOR");
+ if (e && log_show_color_from_string(e) < 0)
+ log_warning("Failed to parse bool %s. Ignoring.", e);
+
+ e = secure_getenv("SYSTEMD_LOG_LOCATION");
+ if (e && log_show_location_from_string(e) < 0)
+ log_warning("Failed to parse bool %s. Ignoring.", e);
}
LogTarget log_get_target(void) {
show_color = b;
}
+bool log_get_show_color(void) {
+ return show_color;
+}
+
void log_show_location(bool b) {
show_location = b;
}
+bool log_get_show_location(void) {
+ return show_location;
+}
+
int log_show_color_from_string(const char *e) {
int t;
return 0;
}
-static const char *const log_target_table[] = {
+bool log_on_console(void) {
+ if (log_target == LOG_TARGET_CONSOLE)
+ return true;
+
+ return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0;
+}
+
+static const char *const log_target_table[_LOG_TARGET_MAX] = {
[LOG_TARGET_CONSOLE] = "console",
[LOG_TARGET_KMSG] = "kmsg",
[LOG_TARGET_JOURNAL] = "journal",
[LOG_TARGET_SYSLOG] = "syslog",
[LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg",
[LOG_TARGET_AUTO] = "auto",
+ [LOG_TARGET_SAFE] = "safe",
[LOG_TARGET_NULL] = "null"
};
DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);
+
+void log_received_signal(int level, const struct signalfd_siginfo *si) {
+ if (si->ssi_pid > 0) {
+ _cleanup_free_ char *p = NULL;
+
+ get_process_comm(si->ssi_pid, &p);
+
+ log_full(level,
+ "Received SIG%s from PID "PID_FMT" (%s).",
+ signal_to_string(si->ssi_signo),
+ si->ssi_pid, strna(p));
+ } else
+ log_full(level,
+ "Received SIG%s.",
+ signal_to_string(si->ssi_signo));
+
+}
~ianmdlvl / elogind.git / blobdiff