-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdarg.h>
-#include <stdio.h>
#include <errno.h>
-#include <unistd.h>
#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/signalfd.h>
#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/uio.h>
#include <sys/un.h>
-#include <stddef.h>
+#include <time.h>
+#include <unistd.h>
-#include "parse-printf-format.h"
#include "sd-messages.h"
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "format-util.h"
+#include "io-util.h"
#include "log.h"
-#include "util.h"
-#include "missing.h"
#include "macro.h"
-#include "socket-util.h"
-#include "formats-util.h"
+#include "missing.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
#include "process-util.h"
-#include "terminal-util.h"
#include "signal-util.h"
+#include "socket-util.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "syslog-util.h"
+#include "terminal-util.h"
+#include "time-util.h"
+#include "utf8.h"
+#include "util.h"
#define SNDBUF_SIZE (8*1024*1024)
static LogTarget log_target = LOG_TARGET_CONSOLE;
-static int log_max_level = LOG_INFO;
+static int log_max_level[] = {LOG_INFO, LOG_INFO};
+assert_cc(ELEMENTSOF(log_max_level) == _LOG_REALM_MAX);
static int log_facility = LOG_DAEMON;
static int console_fd = STDERR_FILENO;
static bool show_color = false;
static bool show_location = false;
-/// UNNEEDED by elogind static bool upgrade_syslog_to_journal = false;
+#if 0 /// UNNEEDED by elogind
+static bool upgrade_syslog_to_journal = false;
+#endif // 0
+static bool always_reopen_console = false;
+static bool open_when_needed = false;
+static bool prohibit_ipc = false;
/* Akin to glibc's __abort_msg; which is private and we hence cannot
* use here. */
static char *log_abort_msg = NULL;
-void log_close_console(void) {
-
- if (console_fd < 0)
- return;
-
- if (getpid() == 1) {
- if (console_fd >= 3)
- safe_close(console_fd);
-
- console_fd = -1;
- }
+/* An assert to use in logging functions that does not call recursively
+ * into our logging functions (since that might lead to a loop). */
+#define assert_raw(expr) \
+ do { \
+ if (_unlikely_(!(expr))) { \
+ fputs(#expr "\n", stderr); \
+ abort(); \
+ } \
+ } while (false)
+
+static void log_close_console(void) {
+ console_fd = safe_close_above_stdio(console_fd);
}
static int log_open_console(void) {
- if (console_fd >= 0)
+ if (!always_reopen_console) {
+ console_fd = STDERR_FILENO;
return 0;
+ }
- if (getpid() == 1) {
+ if (console_fd < 3) {
console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
if (console_fd < 0)
return console_fd;
- } else
- console_fd = STDERR_FILENO;
+
+ console_fd = fd_move_above_stdio(console_fd);
+ }
return 0;
}
-void log_close_kmsg(void) {
+static void log_close_kmsg(void) {
kmsg_fd = safe_close(kmsg_fd);
}
if (kmsg_fd < 0)
return -errno;
+ kmsg_fd = fd_move_above_stdio(kmsg_fd);
return 0;
}
-void log_close_syslog(void) {
+static void log_close_syslog(void) {
syslog_fd = safe_close(syslog_fd);
}
if (fd < 0)
return -errno;
- fd_inc_sndbuf(fd, SNDBUF_SIZE);
+ fd = fd_move_above_stdio(fd);
+ (void) 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)
+ /* 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_cached() == 1)
timeval_store(&tv, 10 * USEC_PER_MSEC);
else
timeval_store(&tv, 10 * USEC_PER_SEC);
goto fail;
}
- if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+ if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
safe_close(syslog_fd);
/* Some legacy syslog systems still use stream
goto fail;
}
- if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+ if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
r = -errno;
goto fail;
}
return r;
}
-/// UNNEEDED by elogind
-#if 0
-void log_close_journal(void) {
+static void log_close_journal(void) {
+#if 0 /// elogind does not support journald
journal_fd = safe_close(journal_fd);
+#endif // 0
}
+#if 0 /// UNNEEDED by elogind
static int log_open_journal(void) {
static const union sockaddr_union sa = {
goto fail;
}
- if (connect(journal_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+ if (connect(journal_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
r = -errno;
goto fail;
}
int log_open(void) {
int r;
+ /* Do not call from library code. */
+
/* If we don't use the console we close it here, to not get
* killed by SAK. If we don't use syslog we close it here so
* that we are not confused by somebody deleting the socket in
- * the fs. If we don't use /dev/kmsg we still keep it open,
+ * the fs, and to make sure we don't use it if prohibit_ipc is
+ * set. If we don't use /dev/kmsg we still keep it open,
* because there is no reason to close it. */
if (log_target == LOG_TARGET_NULL) {
- /// UNNEEDED by elogind log_close_journal();
+ log_close_journal();
log_close_syslog();
log_close_console();
return 0;
}
- if ((log_target != LOG_TARGET_AUTO && log_target != LOG_TARGET_SAFE) ||
- getpid() == 1 ||
+ if (log_target != LOG_TARGET_AUTO ||
+ getpid_cached() == 1 ||
isatty(STDERR_FILENO) <= 0) {
-/// elogind does not support logging to systemd-journald
-#if 0
- if (log_target == LOG_TARGET_AUTO ||
- log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
- log_target == LOG_TARGET_JOURNAL) {
+#if 0 /// elogind does not support logging to systemd-journald
+ if (!prohibit_ipc &&
+ IN_SET(log_target, LOG_TARGET_AUTO,
+ LOG_TARGET_JOURNAL_OR_KMSG,
+ LOG_TARGET_JOURNAL)) {
r = log_open_journal();
if (r >= 0) {
log_close_syslog();
}
}
#endif // 0
- if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
- log_target == LOG_TARGET_SYSLOG) {
+
+ if (!prohibit_ipc &&
+ IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG,
+ LOG_TARGET_SYSLOG)) {
r = log_open_syslog();
if (r >= 0) {
- /// UNNEEDED by elogind log_close_journal();
+ log_close_journal();
log_close_console();
return r;
}
}
- if (log_target == LOG_TARGET_AUTO ||
- log_target == LOG_TARGET_SAFE ||
- /// UNNEEDED by elogind log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
- log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
- log_target == LOG_TARGET_KMSG) {
+ if (IN_SET(log_target, LOG_TARGET_AUTO,
+ LOG_TARGET_JOURNAL_OR_KMSG,
+ LOG_TARGET_SYSLOG_OR_KMSG,
+ LOG_TARGET_KMSG)) {
r = log_open_kmsg();
if (r >= 0) {
- /// UNNEEDED by elogind log_close_journal();
+ log_close_journal();
log_close_syslog();
log_close_console();
return r;
}
}
- /// UNNEEDED by elogind log_close_journal();
+ log_close_journal();
log_close_syslog();
return log_open_console();
assert(target >= 0);
assert(target < _LOG_TARGET_MAX);
-/// elogind does not support logging to systemd-journald
-#if 0
+#if 0 /// elogind does not support logging to systemd-journald
if (upgrade_syslog_to_journal) {
if (target == LOG_TARGET_SYSLOG)
target = LOG_TARGET_JOURNAL;
}
void log_close(void) {
- /// UNNEDED by elogind log_close_journal();
+ /* Do not call from library code. */
+
+ log_close_journal();
log_close_syslog();
log_close_kmsg();
log_close_console();
}
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
void log_forget_fds(void) {
+ /* Do not call from library code. */
+
console_fd = kmsg_fd = syslog_fd = journal_fd = -1;
}
#endif // 0
-void log_set_max_level(int level) {
+void log_set_max_level_realm(LogRealm realm, int level) {
assert((level & LOG_PRIMASK) == level);
+ assert(realm < ELEMENTSOF(log_max_level));
- log_max_level = level;
+ log_max_level[realm] = level;
}
void log_set_facility(int facility) {
const char *file,
int line,
const char *func,
- const char *object_field,
- const char *object,
const char *buffer) {
- char location[64], prefix[1 + DECIMAL_STR_MAX(int) + 2];
+ char location[256], prefix[1 + DECIMAL_STR_MAX(int) + 2];
struct iovec iovec[6] = {};
- unsigned n = 0;
bool highlight;
+ size_t n = 0;
if (console_fd < 0)
return 0;
if (log_target == LOG_TARGET_CONSOLE_PREFIXED) {
- sprintf(prefix, "<%i>", level);
- IOVEC_SET_STRING(iovec[n++], prefix);
+ xsprintf(prefix, "<%i>", level);
+ iovec[n++] = IOVEC_MAKE_STRING(prefix);
}
highlight = LOG_PRI(level) <= LOG_ERR && show_color;
if (show_location) {
- snprintf(location, sizeof(location), "(%s:%i) ", file, line);
- IOVEC_SET_STRING(iovec[n++], location);
+ (void) snprintf(location, sizeof location, "(%s:%i) ", file, line);
+ iovec[n++] = IOVEC_MAKE_STRING(location);
}
if (highlight)
- IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED);
- IOVEC_SET_STRING(iovec[n++], buffer);
+ iovec[n++] = IOVEC_MAKE_STRING(ANSI_HIGHLIGHT_RED);
+ iovec[n++] = IOVEC_MAKE_STRING(buffer);
if (highlight)
- IOVEC_SET_STRING(iovec[n++], ANSI_NORMAL);
- IOVEC_SET_STRING(iovec[n++], "\n");
+ iovec[n++] = IOVEC_MAKE_STRING(ANSI_NORMAL);
+ iovec[n++] = IOVEC_MAKE_STRING("\n");
if (writev(console_fd, iovec, n) < 0) {
- if (errno == EIO && getpid() == 1) {
+ if (errno == EIO && getpid_cached() == 1) {
/* If somebody tried to kick us from our
* console tty (via vhangup() or suchlike),
const char *file,
int line,
const char *func,
- const char *object_field,
- const char *object,
const char *buffer) {
char header_priority[2 + DECIMAL_STR_MAX(int) + 1],
if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
return -EINVAL;
- xsprintf(header_pid, "["PID_FMT"]: ", getpid());
+ xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached());
- IOVEC_SET_STRING(iovec[0], header_priority);
- IOVEC_SET_STRING(iovec[1], header_time);
- IOVEC_SET_STRING(iovec[2], program_invocation_short_name);
- IOVEC_SET_STRING(iovec[3], header_pid);
- IOVEC_SET_STRING(iovec[4], buffer);
+ iovec[0] = IOVEC_MAKE_STRING(header_priority);
+ iovec[1] = IOVEC_MAKE_STRING(header_time);
+ iovec[2] = IOVEC_MAKE_STRING(program_invocation_short_name);
+ iovec[3] = IOVEC_MAKE_STRING(header_pid);
+ iovec[4] = IOVEC_MAKE_STRING(buffer);
/* When using syslog via SOCK_STREAM separate the messages by NUL chars */
if (syslog_is_stream)
const char *file,
int line,
const char *func,
- const char *object_field,
- const char *object,
const char *buffer) {
char header_priority[2 + DECIMAL_STR_MAX(int) + 1],
return 0;
xsprintf(header_priority, "<%i>", level);
- xsprintf(header_pid, "["PID_FMT"]: ", getpid());
+ xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached());
- IOVEC_SET_STRING(iovec[0], header_priority);
- IOVEC_SET_STRING(iovec[1], program_invocation_short_name);
- IOVEC_SET_STRING(iovec[2], header_pid);
- IOVEC_SET_STRING(iovec[3], buffer);
- IOVEC_SET_STRING(iovec[4], "\n");
+ iovec[0] = IOVEC_MAKE_STRING(header_priority);
+ iovec[1] = IOVEC_MAKE_STRING(program_invocation_short_name);
+ iovec[2] = IOVEC_MAKE_STRING(header_pid);
+ iovec[3] = IOVEC_MAKE_STRING(buffer);
+ iovec[4] = IOVEC_MAKE_STRING("\n");
if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0)
return -errno;
return 1;
}
-/// UNNEEDED by elogind
-#if 0
static int log_do_header(
char *header,
size_t size,
int level,
int error,
const char *file, int line, const char *func,
- const char *object_field, const char *object) {
-
- snprintf(header, size,
- "PRIORITY=%i\n"
- "SYSLOG_FACILITY=%i\n"
- "%s%s%s"
- "%s%.*i%s"
- "%s%s%s"
- "%s%.*i%s"
- "%s%s%s"
- "SYSLOG_IDENTIFIER=%s\n",
- LOG_PRI(level),
- LOG_FAC(level),
- isempty(file) ? "" : "CODE_FILE=",
- isempty(file) ? "" : file,
- isempty(file) ? "" : "\n",
- line ? "CODE_LINE=" : "",
- line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */
- line ? "\n" : "",
- isempty(func) ? "" : "CODE_FUNCTION=",
- isempty(func) ? "" : func,
- isempty(func) ? "" : "\n",
- error ? "ERRNO=" : "",
- error ? 1 : 0, error,
- error ? "\n" : "",
- isempty(object) ? "" : object_field,
- isempty(object) ? "" : object,
- isempty(object) ? "" : "\n",
- program_invocation_short_name);
+ const char *object_field, const char *object,
+ const char *extra_field, const char *extra) {
+ int r;
+
+ r = snprintf(header, size,
+ "PRIORITY=%i\n"
+ "SYSLOG_FACILITY=%i\n"
+ "%s%.256s%s" /* CODE_FILE */
+ "%s%.*i%s" /* CODE_LINE */
+ "%s%.256s%s" /* CODE_FUNC */
+ "%s%.*i%s" /* ERRNO */
+ "%s%.256s%s" /* object */
+ "%s%.256s%s" /* extra */
+ "SYSLOG_IDENTIFIER=%.256s\n",
+ LOG_PRI(level),
+ LOG_FAC(level),
+ isempty(file) ? "" : "CODE_FILE=",
+ isempty(file) ? "" : file,
+ isempty(file) ? "" : "\n",
+ line ? "CODE_LINE=" : "",
+ line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */
+ line ? "\n" : "",
+ isempty(func) ? "" : "CODE_FUNC=",
+ isempty(func) ? "" : func,
+ isempty(func) ? "" : "\n",
+ error ? "ERRNO=" : "",
+ error ? 1 : 0, error,
+ error ? "\n" : "",
+ isempty(object) ? "" : object_field,
+ isempty(object) ? "" : object,
+ isempty(object) ? "" : "\n",
+ isempty(extra) ? "" : extra_field,
+ isempty(extra) ? "" : extra,
+ isempty(extra) ? "" : "\n",
+ program_invocation_short_name);
+ assert_raw((size_t) r < size);
return 0;
}
+#if 0 /// UNNEEDED by elogind
static int write_to_journal(
int level,
int error,
const char *func,
const char *object_field,
const char *object,
+ const char *extra_field,
+ const char *extra,
const char *buffer) {
char header[LINE_MAX];
if (journal_fd < 0)
return 0;
- log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object);
+ log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object, extra_field, extra);
- IOVEC_SET_STRING(iovec[0], header);
- IOVEC_SET_STRING(iovec[1], "MESSAGE=");
- IOVEC_SET_STRING(iovec[2], buffer);
- IOVEC_SET_STRING(iovec[3], "\n");
+ iovec[0] = IOVEC_MAKE_STRING(header);
+ iovec[1] = IOVEC_MAKE_STRING("MESSAGE=");
+ iovec[2] = IOVEC_MAKE_STRING(buffer);
+ iovec[3] = IOVEC_MAKE_STRING("\n");
mh.msg_iov = iovec;
mh.msg_iovlen = ELEMENTSOF(iovec);
}
#endif // 0
-static int log_dispatch(
+int log_dispatch_internal(
int level,
int error,
const char *file,
const char *func,
const char *object_field,
const char *object,
+ const char *extra_field,
+ const char *extra,
char *buffer) {
- assert(buffer);
+ assert_raw(buffer);
+
+ if (error < 0)
+ error = -error;
if (log_target == LOG_TARGET_NULL)
return -error;
if ((level & LOG_FACMASK) == 0)
level = log_facility | LOG_PRI(level);
- if (error < 0)
- error = -error;
+ if (open_when_needed)
+ log_open();
do {
char *e;
if ((e = strpbrk(buffer, NEWLINE)))
*(e++) = 0;
-/// elogind does not support logging to systemd-journald
-#if 0
- if (log_target == LOG_TARGET_AUTO ||
- log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
- log_target == LOG_TARGET_JOURNAL) {
+#if 0 /// elogind does not support logging to systemd-journald
+ if (IN_SET(log_target, LOG_TARGET_AUTO,
+ LOG_TARGET_JOURNAL_OR_KMSG,
+ LOG_TARGET_JOURNAL)) {
- k = write_to_journal(level, error, file, line, func, object_field, object, buffer);
- if (k < 0) {
- if (k != -EAGAIN)
- log_close_journal();
- log_open_kmsg();
- }
+ k = write_to_journal(level, error, file, line, func, object_field, object, extra_field, extra, buffer);
+ if (k < 0 && k != -EAGAIN)
+ log_close_journal();
}
#endif // 0
- if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
- log_target == LOG_TARGET_SYSLOG) {
+ if (IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG,
+ LOG_TARGET_SYSLOG)) {
- k = write_to_syslog(level, error, file, line, func, object_field, object, buffer);
- if (k < 0) {
- if (k != -EAGAIN)
- log_close_syslog();
- log_open_kmsg();
- }
+ k = write_to_syslog(level, error, file, line, func, buffer);
+ if (k < 0 && 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 ||
- /// UNNEEDED by elogind log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
- log_target == LOG_TARGET_KMSG)) {
+ IN_SET(log_target, LOG_TARGET_AUTO,
+ LOG_TARGET_SYSLOG_OR_KMSG,
+ LOG_TARGET_JOURNAL_OR_KMSG,
+ LOG_TARGET_KMSG)) {
- k = write_to_kmsg(level, error, file, line, func, object_field, object, buffer);
+ if (k < 0)
+ log_open_kmsg();
+
+ k = write_to_kmsg(level, error, file, line, func, buffer);
if (k < 0) {
log_close_kmsg();
log_open_console();
}
if (k <= 0)
- (void) write_to_console(level, error, file, line, func, object_field, object, buffer);
+ (void) write_to_console(level, error, file, line, func, buffer);
buffer = e;
} while (buffer);
+ if (open_when_needed)
+ log_close();
+
return -error;
}
int log_dump_internal(
- int level,
- int error,
- const char *file,
- int line,
- const char *func,
- char *buffer) {
+ int level,
+ int error,
+ const char *file,
+ int line,
+ const char *func,
+ char *buffer) {
+ LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
PROTECT_ERRNO;
/* This modifies the buffer... */
if (error < 0)
error = -error;
- if (_likely_(LOG_PRI(level) > log_max_level))
+ if (_likely_(LOG_PRI(level) > log_max_level[realm]))
return -error;
- return log_dispatch(level, error, file, line, func, NULL, NULL, buffer);
+ return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
}
-int log_internalv(
+int log_internalv_realm(
int level,
int error,
const char *file,
const char *format,
va_list ap) {
- PROTECT_ERRNO;
+ LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
char buffer[LINE_MAX];
+ PROTECT_ERRNO;
if (error < 0)
error = -error;
- if (_likely_(LOG_PRI(level) > log_max_level))
+ if (_likely_(LOG_PRI(level) > log_max_level[realm]))
return -error;
- /* Make sure that %m maps to the specified error */
- if (error != 0)
- errno = error;
+ /* Make sure that %m maps to the specified error (or "Success"). */
+ errno = error;
- vsnprintf(buffer, sizeof(buffer), format, ap);
+ (void) vsnprintf(buffer, sizeof buffer, format, ap);
- return log_dispatch(level, error, file, line, func, NULL, NULL, buffer);
+ return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
}
-int log_internal(
+int log_internal_realm(
int level,
int error,
const char *file,
int r;
va_start(ap, format);
- r = log_internalv(level, error, file, line, func, format, ap);
+ r = log_internalv_realm(level, error, file, line, func, format, ap);
va_end(ap);
return r;
}
-int log_object_internalv(
+_printf_(10,0)
+static int log_object_internalv(
int level,
int error,
const char *file,
const char *func,
const char *object_field,
const char *object,
+ const char *extra_field,
+ const char *extra,
const char *format,
va_list ap) {
PROTECT_ERRNO;
char *buffer, *b;
- size_t l;
if (error < 0)
error = -error;
- if (_likely_(LOG_PRI(level) > log_max_level))
+ if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]))
return -error;
- /* Make sure that %m maps to the specified error */
- if (error != 0)
- errno = error;
+ /* Make sure that %m maps to the specified error (or "Success"). */
+ errno = error;
/* Prepend the object name before the message */
if (object) {
size_t n;
n = strlen(object);
- l = n + 2 + LINE_MAX;
-
- buffer = newa(char, l);
+ buffer = newa(char, n + 2 + LINE_MAX);
b = stpcpy(stpcpy(buffer, object), ": ");
- } else {
- l = LINE_MAX;
- b = buffer = newa(char, l);
- }
+ } else
+ b = buffer = newa(char, LINE_MAX);
- vsnprintf(b, l, format, ap);
+ (void) vsnprintf(b, LINE_MAX, format, ap);
- return log_dispatch(level, error, file, line, func, object_field, object, buffer);
+ return log_dispatch_internal(level, error, file, line, func,
+ object_field, object, extra_field, extra, buffer);
}
int log_object_internal(
const char *func,
const char *object_field,
const char *object,
+ const char *extra_field,
+ const char *extra,
const char *format, ...) {
va_list ap;
int r;
va_start(ap, format);
- r = log_object_internalv(level, error, file, line, func, object_field, object, format, ap);
+ r = log_object_internalv(level, error, file, line, func, object_field, object, extra_field, extra, format, ap);
va_end(ap);
return r;
const char *format) {
static char buffer[LINE_MAX];
+ LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
- if (_likely_(LOG_PRI(level) > log_max_level))
+ if (_likely_(LOG_PRI(level) > log_max_level[realm]))
return;
DISABLE_WARNING_FORMAT_NONLITERAL;
- snprintf(buffer, sizeof(buffer), format, text, file, line, func);
+ (void) snprintf(buffer, sizeof buffer, format, text, file, line, func);
REENABLE_WARNING;
log_abort_msg = buffer;
- log_dispatch(level, 0, file, line, func, NULL, NULL, buffer);
+ log_dispatch_internal(level, 0, file, line, func, NULL, NULL, 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.");
+_noreturn_ void log_assert_failed_realm(
+ LogRealm realm,
+ const char *text,
+ const char *file,
+ int line,
+ const char *func) {
+ log_open();
+ log_assert(LOG_REALM_PLUS_LEVEL(realm, 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.");
+_noreturn_ void log_assert_failed_unreachable_realm(
+ LogRealm realm,
+ const char *text,
+ const char *file,
+ int line,
+ const char *func) {
+ log_open();
+ log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func,
+ "Code should not be reached '%s' at %s:%u, function %s(). Aborting.");
abort();
}
-void log_assert_failed_return(const char *text, const char *file, int line, const char *func) {
+void log_assert_failed_return_realm(
+ LogRealm realm,
+ 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.");
+ log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_DEBUG), text, file, line, func,
+ "Assertion '%s' failed at %s:%u, function %s(). Ignoring.");
}
-int log_oom_internal(const char *file, int line, const char *func) {
- log_internal(LOG_ERR, ENOMEM, file, line, func, "Out of memory.");
- return -ENOMEM;
+int log_oom_internal(LogRealm realm, const char *file, int line, const char *func) {
+ return log_internal_realm(LOG_REALM_PLUS_LEVEL(realm, LOG_ERR),
+ ENOMEM, file, line, func, "Out of memory.");
+}
+
+int log_format_iovec(
+ struct iovec *iovec,
+ size_t iovec_len,
+ size_t *n,
+ bool newline_separator,
+ int error,
+ const char *format,
+ va_list ap) {
+
+ static const char nl = '\n';
+
+ while (format && *n + 1 < iovec_len) {
+ va_list aq;
+ char *m;
+ int r;
+
+ /* We need to copy the va_list structure,
+ * since vasprintf() leaves it afterwards at
+ * an undefined location */
+
+ errno = error;
+
+ va_copy(aq, ap);
+ r = vasprintf(&m, format, aq);
+ va_end(aq);
+ if (r < 0)
+ return -EINVAL;
+
+ /* Now, jump enough ahead, so that we point to
+ * the next format string */
+ VA_FORMAT_ADVANCE(format, ap);
+
+ iovec[(*n)++] = IOVEC_MAKE_STRING(m);
+
+ if (newline_separator) {
+ iovec[*n].iov_base = (char*) &nl;
+ iovec[*n].iov_len = 1;
+ (*n)++;
+ }
+
+ format = va_arg(ap, char *);
+ }
+ return 0;
}
int log_struct_internal(
const char *func,
const char *format, ...) {
+ LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
char buf[LINE_MAX];
bool found = false;
PROTECT_ERRNO;
if (error < 0)
error = -error;
- if (_likely_(LOG_PRI(level) > log_max_level))
+ if (_likely_(LOG_PRI(level) > log_max_level[realm]))
return -error;
if (log_target == LOG_TARGET_NULL)
if ((level & LOG_FACMASK) == 0)
level = log_facility | LOG_PRI(level);
-/// elogind does not support logging to systemd-journald
-#if 0
- 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';
- bool fallback = false;
-
- /* If the journal is available do structured logging */
- log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL);
- IOVEC_SET_STRING(iovec[n++], header);
-
- va_start(ap, format);
- while (format && n + 1 < ELEMENTSOF(iovec)) {
- va_list aq;
- char *m;
-
- /* We need to copy the va_list structure,
- * since vasprintf() leaves it afterwards at
- * an undefined location */
-
- if (error != 0)
- errno = error;
-
- va_copy(aq, ap);
- if (vasprintf(&m, format, aq) < 0) {
- va_end(aq);
+#if 0 /// elogind does not support logging to systemd-journald
+ if (IN_SET(log_target,
+ LOG_TARGET_AUTO,
+ LOG_TARGET_JOURNAL_OR_KMSG,
+ LOG_TARGET_JOURNAL)) {
+
+ if (open_when_needed)
+ log_open_journal();
+
+ if (journal_fd >= 0) {
+ char header[LINE_MAX];
+ struct iovec iovec[17] = {};
+ size_t n = 0, i;
+ int r;
+ struct msghdr mh = {
+ .msg_iov = iovec,
+ };
+ bool fallback = false;
+
+ /* If the journal is available do structured logging */
+ log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);
+ iovec[n++] = IOVEC_MAKE_STRING(header);
+
+ va_start(ap, format);
+ r = log_format_iovec(iovec, ELEMENTSOF(iovec), &n, true, error, format, ap);
+ if (r < 0)
fallback = true;
- goto finish;
+ else {
+ mh.msg_iovlen = n;
+ (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL);
}
- 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++], m);
+ va_end(ap);
+ for (i = 1; i < n; i += 2)
+ free(iovec[i].iov_base);
- iovec[n].iov_base = (char*) &nl;
- iovec[n].iov_len = 1;
- n++;
+ if (!fallback) {
+ if (open_when_needed)
+ log_close();
- format = va_arg(ap, char *);
+ return -error;
+ }
}
-
- mh.msg_iovlen = n;
-
- (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL);
-
- finish:
- va_end(ap);
- for (i = 1; i < n; i += 2)
- free(iovec[i].iov_base);
-
- if (!fallback)
- return -error;
}
#endif // 0
while (format) {
va_list aq;
- if (error != 0)
- errno = error;
+ errno = error;
va_copy(aq, ap);
- vsnprintf(buf, sizeof(buf), format, aq);
+ (void) vsnprintf(buf, sizeof buf, format, aq);
va_end(aq);
if (startswith(buf, "MESSAGE=")) {
}
va_end(ap);
- if (!found)
+ if (!found) {
+ if (open_when_needed)
+ log_close();
+
return -error;
+ }
- return log_dispatch(level, error, file, line, func, NULL, NULL, buf + 8);
+ return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buf + 8);
+}
+
+int log_struct_iovec_internal(
+ int level,
+ int error,
+ const char *file,
+ int line,
+ const char *func,
+ const struct iovec input_iovec[],
+ size_t n_input_iovec) {
+
+ LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
+ PROTECT_ERRNO;
+ size_t i;
+ char *m;
+
+ if (error < 0)
+ error = -error;
+
+ if (_likely_(LOG_PRI(level) > log_max_level[realm]))
+ return -error;
+
+ if (log_target == LOG_TARGET_NULL)
+ return -error;
+
+ if ((level & LOG_FACMASK) == 0)
+ level = log_facility | LOG_PRI(level);
+
+ if (IN_SET(log_target, LOG_TARGET_AUTO,
+ LOG_TARGET_JOURNAL_OR_KMSG,
+ LOG_TARGET_JOURNAL) &&
+ journal_fd >= 0) {
+
+ struct iovec iovec[1 + n_input_iovec*2];
+ char header[LINE_MAX];
+ struct msghdr mh = {
+ .msg_iov = iovec,
+ .msg_iovlen = 1 + n_input_iovec*2,
+ };
+
+ log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);
+ iovec[0] = IOVEC_MAKE_STRING(header);
+
+ for (i = 0; i < n_input_iovec; i++) {
+ iovec[1+i*2] = input_iovec[i];
+ iovec[1+i*2+1] = IOVEC_MAKE_STRING("\n");
+ }
+
+ if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) >= 0)
+ return -error;
+ }
+
+ for (i = 0; i < n_input_iovec; i++)
+ if (memory_startswith(input_iovec[i].iov_base, input_iovec[i].iov_len, "MESSAGE="))
+ break;
+
+ if (_unlikely_(i >= n_input_iovec)) /* Couldn't find MESSAGE=? */
+ return -error;
+
+ m = strndupa(input_iovec[i].iov_base + STRLEN("MESSAGE="),
+ input_iovec[i].iov_len - STRLEN("MESSAGE="));
+
+ return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, m);
}
int log_set_target_from_string(const char *e) {
return 0;
}
-int log_set_max_level_from_string(const char *e) {
+int log_set_max_level_from_string_realm(LogRealm realm, const char *e) {
int t;
t = log_level_from_string(e);
if (t < 0)
return -EINVAL;
- log_set_max_level(t);
+ log_set_max_level_realm(realm, t);
return 0;
}
-static int parse_proc_cmdline_item(const char *key, const char *value) {
+static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
/*
* The systemd.log_xyz= settings are parsed by all tools, and
if (streq(key, "debug") && !value)
log_set_max_level(LOG_DEBUG);
- else if (streq(key, "systemd.log_target") && value) {
+ else if (proc_cmdline_key_streq(key, "systemd.log_target")) {
+
+ if (proc_cmdline_value_missing(key, value))
+ return 0;
if (log_set_target_from_string(value) < 0)
log_warning("Failed to parse log target '%s'. Ignoring.", value);
- } else if (streq(key, "systemd.log_level") && value) {
+ } else if (proc_cmdline_key_streq(key, "systemd.log_level")) {
+
+ if (proc_cmdline_value_missing(key, value))
+ return 0;
if (log_set_max_level_from_string(value) < 0)
log_warning("Failed to parse log level '%s'. Ignoring.", value);
- } else if (streq(key, "systemd.log_color") && value) {
+ } else if (proc_cmdline_key_streq(key, "systemd.log_color")) {
- if (log_show_color_from_string(value) < 0)
+ if (log_show_color_from_string(value ?: "1") < 0)
log_warning("Failed to parse log color setting '%s'. Ignoring.", value);
- } else if (streq(key, "systemd.log_location") && value) {
+ } else if (proc_cmdline_key_streq(key, "systemd.log_location")) {
- if (log_show_location_from_string(value) < 0)
+ if (log_show_location_from_string(value ?: "1") < 0)
log_warning("Failed to parse log location setting '%s'. Ignoring.", value);
}
return 0;
}
-void log_parse_environment(void) {
+void log_parse_environment_realm(LogRealm realm) {
+ /* Do not call from library code. */
+
const char *e;
if (get_ctty_devnr(0, NULL) < 0)
- /* Only try to read the command line in daemons.
- We assume that anything that has a controlling
- tty is user stuff. */
- (void) parse_proc_cmdline(parse_proc_cmdline_item);
+ /* Only try to read the command line in daemons. We assume that anything that has a controlling tty is
+ user stuff. */
+ (void) proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
- e = secure_getenv("SYSTEMD_LOG_TARGET");
+ e = getenv("SYSTEMD_LOG_TARGET");
if (e && log_set_target_from_string(e) < 0)
log_warning("Failed to parse log target '%s'. Ignoring.", e);
- e = secure_getenv("SYSTEMD_LOG_LEVEL");
- if (e && log_set_max_level_from_string(e) < 0)
+ e = getenv("SYSTEMD_LOG_LEVEL");
+ if (e && log_set_max_level_from_string_realm(realm, e) < 0)
log_warning("Failed to parse log level '%s'. Ignoring.", e);
- e = secure_getenv("SYSTEMD_LOG_COLOR");
+ e = 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");
+ e = getenv("SYSTEMD_LOG_LOCATION");
if (e && log_show_location_from_string(e) < 0)
log_warning("Failed to parse bool '%s'. Ignoring.", e);
}
return log_target;
}
-int log_get_max_level(void) {
- return log_max_level;
+int log_get_max_level_realm(LogRealm realm) {
+ return log_max_level[realm];
}
void log_show_color(bool b) {
}
bool log_on_console(void) {
- if (log_target == LOG_TARGET_CONSOLE ||
- log_target == LOG_TARGET_CONSOLE_PREFIXED)
+ if (IN_SET(log_target, LOG_TARGET_CONSOLE,
+ LOG_TARGET_CONSOLE_PREFIXED))
return true;
return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0;
[LOG_TARGET_CONSOLE] = "console",
[LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed",
[LOG_TARGET_KMSG] = "kmsg",
-/// elogind does not support logging to systemd-journald
-#if 0
+#if 0 /// elogind does not support logging to systemd-journald
[LOG_TARGET_JOURNAL] = "journal",
[LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg",
#endif // 0
[LOG_TARGET_SYSLOG] = "syslog",
[LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg",
[LOG_TARGET_AUTO] = "auto",
- [LOG_TARGET_SAFE] = "safe",
- [LOG_TARGET_NULL] = "null"
+ [LOG_TARGET_NULL] = "null",
};
DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
void log_received_signal(int level, const struct signalfd_siginfo *si) {
- if (si->ssi_pid > 0) {
+ assert(si);
+
+ if (pid_is_valid(si->ssi_pid)) {
_cleanup_free_ char *p = NULL;
- get_process_comm(si->ssi_pid, &p);
+ (void) get_process_comm(si->ssi_pid, &p);
log_full(level,
"Received SIG%s from PID %"PRIu32" (%s).",
log_full(level,
"Received SIG%s.",
signal_to_string(si->ssi_signo));
-
}
-void log_set_upgrade_syslog_to_journal(bool b) {
- upgrade_syslog_to_journal = b;
-}
#endif // 0
-
int log_syntax_internal(
const char *unit,
int level,
PROTECT_ERRNO;
char buffer[LINE_MAX];
- int r;
va_list ap;
+ const char *unit_fmt = NULL;
if (error < 0)
error = -error;
- if (_likely_(LOG_PRI(level) > log_max_level))
+ if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]))
return -error;
if (log_target == LOG_TARGET_NULL)
return -error;
- if (error != 0)
- errno = error;
+ errno = error;
va_start(ap, format);
- vsnprintf(buffer, sizeof(buffer), format, ap);
+ (void) vsnprintf(buffer, sizeof buffer, format, ap);
va_end(ap);
if (unit)
- r = log_struct_internal(
- level, error,
- file, line, func,
- getpid() == 1 ? "UNIT=%s" : "USER_UNIT=%s", unit,
- LOG_MESSAGE_ID(SD_MESSAGE_INVALID_CONFIGURATION),
- "CONFIG_FILE=%s", config_file,
- "CONFIG_LINE=%u", config_line,
- LOG_MESSAGE("[%s:%u] %s", config_file, config_line, buffer),
- NULL);
- else
- r = log_struct_internal(
- level, error,
- file, line, func,
- LOG_MESSAGE_ID(SD_MESSAGE_INVALID_CONFIGURATION),
- "CONFIG_FILE=%s", config_file,
- "CONFIG_LINE=%u", config_line,
- LOG_MESSAGE("[%s:%u] %s", config_file, config_line, buffer),
- NULL);
+ unit_fmt = getpid_cached() == 1 ? "UNIT=%s" : "USER_UNIT=%s";
+
+ return log_struct_internal(
+ LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level),
+ error,
+ file, line, func,
+ "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR,
+ "CONFIG_FILE=%s", config_file,
+ "CONFIG_LINE=%u", config_line,
+ LOG_MESSAGE("%s:%u: %s", config_file, config_line, buffer),
+ unit_fmt, unit,
+ NULL);
+}
- return r;
+int log_syntax_invalid_utf8_internal(
+ const char *unit,
+ int level,
+ const char *config_file,
+ unsigned config_line,
+ const char *file,
+ int line,
+ const char *func,
+ const char *rvalue) {
+
+ _cleanup_free_ char *p = NULL;
+
+ if (rvalue)
+ p = utf8_escape_invalid(rvalue);
+
+ log_syntax_internal(unit, level, config_file, config_line, 0, file, line, func,
+ "String is not UTF-8 clean, ignoring assignment: %s", strna(p));
+
+ return -EINVAL;
+}
+
+#if 0 /// UNNEEDED by elogind
+void log_set_upgrade_syslog_to_journal(bool b) {
+ upgrade_syslog_to_journal = b;
+
+ /* Make the change effective immediately */
+ if (b) {
+ if (log_target == LOG_TARGET_SYSLOG)
+ log_target = LOG_TARGET_JOURNAL;
+ else if (log_target == LOG_TARGET_SYSLOG_OR_KMSG)
+ log_target = LOG_TARGET_JOURNAL_OR_KMSG;
+ }
+}
+
+void log_set_always_reopen_console(bool b) {
+ always_reopen_console = b;
+}
+#endif // 0
+
+void log_set_open_when_needed(bool b) {
+ open_when_needed = b;
+}
+
+void log_set_prohibit_ipc(bool b) {
+ prohibit_ipc = b;
+}
+
+int log_emergency_level(void) {
+ /* Returns the log level to use for log_emergency() logging. We use LOG_EMERG only when we are PID 1, as only
+ * then the system of the whole system is obviously affected. */
+
+ return getpid_cached() == 1 ? LOG_EMERG : LOG_ERR;
+}
+
+int log_dup_console(void) {
+ int copy;
+
+ /* Duplicate the fd we use for fd logging if it's < 3 and use the copy from now on. This call is useful
+ * whenever we want to continue logging through the original fd, but want to rearrange stderr. */
+
+ if (console_fd >= 3)
+ return 0;
+
+ copy = fcntl(console_fd, F_DUPFD_CLOEXEC, 3);
+ if (copy < 0)
+ return -errno;
+
+ console_fd = copy;
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff