X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=src%2Flog.c;fp=src%2Flog.c;h=0000000000000000000000000000000000000000;hb=d7832d2c6e0ef5f2839a2296c1cc2fc85c7d9632;hp=9fffc1dbc00ba2123cae35afbf3d4eb0156865eb;hpb=304b9f30781b8625c1f84fd27205f2707d4843b1;p=elogind.git
diff --git a/src/log.c b/src/log.c
deleted file mode 100644
index 9fffc1dbc..000000000
--- a/src/log.c
+++ /dev/null
@@ -1,747 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- 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 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 .
-***/
-
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-
-#include "log.h"
-#include "util.h"
-#include "macro.h"
-#include "socket-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_facility = LOG_DAEMON;
-
-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;
-
-static bool show_color = false;
-static bool show_location = 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)
- close_nointr_nofail(console_fd);
-
- console_fd = -1;
- }
-}
-
-static int log_open_console(void) {
-
- if (console_fd >= 0)
- 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));
- return console_fd;
- }
-
- log_debug("Successfully opened /dev/console for logging.");
- } else
- console_fd = STDERR_FILENO;
-
- return 0;
-}
-
-void log_close_kmsg(void) {
-
- if (kmsg_fd < 0)
- return;
-
- close_nointr_nofail(kmsg_fd);
- kmsg_fd = -1;
-}
-
-static int log_open_kmsg(void) {
-
- if (kmsg_fd >= 0)
- 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));
- return -errno;
- }
-
- log_debug("Successfully opened /dev/kmsg for logging.");
-
- return 0;
-}
-
-void log_close_syslog(void) {
-
- if (syslog_fd < 0)
- return;
-
- close_nointr_nofail(syslog_fd);
- syslog_fd = -1;
-}
-
-static int create_log_socket(int type) {
- int fd;
-
- /* 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);
- if (fd < 0)
- return -errno;
-
- fd_inc_sndbuf(fd, SNDBUF_SIZE);
-
- return fd;
-}
-
-static int log_open_syslog(void) {
- union sockaddr_union sa;
- int r;
-
- 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;
- goto fail;
- }
-
- if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
- close_nointr_nofail(syslog_fd);
-
- /* Some legacy syslog systems still use stream
- * sockets. They really shouldn't. But what can we
- * do... */
- syslog_fd = create_log_socket(SOCK_STREAM);
- if (syslog_fd < 0) {
- r = syslog_fd;
- goto fail;
- }
-
- if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
- r = -errno;
- goto fail;
- }
-
- syslog_is_stream = true;
- } 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;
-}
-
-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;
-
- /* 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,
- * 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;
- }
-
- if (log_target != LOG_TARGET_AUTO ||
- getpid() == 1 ||
- isatty(STDERR_FILENO) <= 0) {
-
- if (log_target == LOG_TARGET_AUTO ||
- 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) {
- 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 */
- log_close_console();
- return log_open_console();
-}
-
-void log_set_target(LogTarget target) {
- assert(target >= 0);
- assert(target < _LOG_TARGET_MAX);
-
- log_target = target;
-}
-
-void log_close(void) {
- log_close_journal();
- log_close_syslog();
- log_close_kmsg();
- log_close_console();
-}
-
-void log_forget_fds(void) {
- console_fd = kmsg_fd = syslog_fd = journal_fd = -1;
-}
-
-void log_set_max_level(int level) {
- assert((level & LOG_PRIMASK) == level);
-
- log_max_level = level;
-}
-
-void log_set_facility(int facility) {
- log_facility = facility;
-}
-
-static int write_to_console(
- int level,
- const char*file,
- int line,
- const char *func,
- const char *buffer) {
-
- char location[64];
- struct iovec iovec[5];
- unsigned n = 0;
- bool highlight;
-
- if (console_fd < 0)
- return 0;
-
- 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++], location);
- }
-
- if (highlight)
- IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED_ON);
- IOVEC_SET_STRING(iovec[n++], buffer);
- if (highlight)
- IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_OFF);
- IOVEC_SET_STRING(iovec[n++], "\n");
-
- if (writev(console_fd, iovec, n) < 0)
- return -errno;
-
- return 1;
-}
-
-static int write_to_syslog(
- int level,
- const char*file,
- int line,
- const char *func,
- const char *buffer) {
-
- char header_priority[16], header_time[64], header_pid[16];
- struct iovec iovec[5];
- struct msghdr msghdr;
- time_t t;
- struct tm *tm;
-
- if (syslog_fd < 0)
- return 0;
-
- snprintf(header_priority, sizeof(header_priority), "<%i>", level);
- char_array_0(header_priority);
-
- t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC);
- if (!(tm = localtime(&t)))
- return -EINVAL;
-
- if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
- return -EINVAL;
-
- 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);
- IOVEC_SET_STRING(iovec[3], header_pid);
- IOVEC_SET_STRING(iovec[4], buffer);
-
- /* When using syslog via SOCK_STREAM separate the messages by NUL chars */
- if (syslog_is_stream)
- iovec[4].iov_len++;
-
- zero(msghdr);
- msghdr.msg_iov = iovec;
- msghdr.msg_iovlen = ELEMENTSOF(iovec);
-
- for (;;) {
- ssize_t n;
-
- n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL);
- if (n < 0)
- return -errno;
-
- if (!syslog_is_stream ||
- (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec)))
- break;
-
- IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n);
- }
-
- return 1;
-}
-
-static int write_to_kmsg(
- int level,
- const char*file,
- int line,
- const char *func,
- const char *buffer) {
-
- char header_priority[16], header_pid[16];
- struct iovec iovec[5];
-
- if (kmsg_fd < 0)
- return 0;
-
- snprintf(header_priority, sizeof(header_priority), "<%i>", level);
- char_array_0(header_priority);
-
- 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);
- IOVEC_SET_STRING(iovec[3], buffer);
- IOVEC_SET_STRING(iovec[4], "\n");
-
- if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0)
- return -errno;
-
- 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"
- "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);
-
- 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,
- int line,
- const char *func,
- char *buffer) {
-
- int r = 0;
-
- if (log_target == LOG_TARGET_NULL)
- return 0;
-
- /* Patch in LOG_DAEMON facility if necessary */
- if ((level & LOG_FACMASK) == 0)
- level = log_facility | LOG_PRI(level);
-
- do {
- char *e;
- int k = 0;
-
- buffer += strspn(buffer, NEWLINE);
-
- if (buffer[0] == 0)
- break;
-
- if ((e = strpbrk(buffer, NEWLINE)))
- *(e++) = 0;
-
- if (log_target == LOG_TARGET_AUTO ||
- 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);
- if (k < 0) {
- if (k != -EAGAIN)
- log_close_syslog();
- log_open_kmsg();
- } else if (k > 0)
- r++;
- }
-
- if (k <= 0 &&
- (log_target == LOG_TARGET_AUTO ||
- log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
- log_target == LOG_TARGET_KMSG)) {
-
- k = write_to_kmsg(level, file, line, func, buffer);
- if (k < 0) {
- log_close_kmsg();
- log_open_console();
- } else if (k > 0)
- r++;
- }
-
- if (k <= 0) {
- k = write_to_console(level, file, line, func, buffer);
- if (k < 0)
- return k;
- }
-
- buffer = e;
- } while (buffer);
-
- return r;
-}
-
-int log_dump_internal(
- int level,
- const char*file,
- int line,
- const char *func,
- char *buffer) {
-
- int saved_errno, r;
-
- /* 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;
-}
-
-int log_metav(
- int level,
- const char*file,
- int line,
- const char *func,
- const char *format,
- va_list ap) {
-
- 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;
-}
-
-int log_meta(
- int level,
- const char*file,
- int line,
- const char *func,
- const char *format, ...) {
-
- int r;
- va_list ap;
-
- va_start(ap, format);
- r = log_metav(level, file, line, func, format, ap);
- va_end(ap);
-
- 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) {
- static char buffer[LINE_MAX];
-
- snprintf(buffer, sizeof(buffer), format, text, file, line, func);
-
- char_array_0(buffer);
- log_abort_msg = buffer;
-
- log_dispatch(LOG_CRIT, file, line, func, buffer);
- 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.");
-}
-
-_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_set_target_from_string(const char *e) {
- LogTarget t;
-
- t = log_target_from_string(e);
- if (t < 0)
- return -EINVAL;
-
- log_set_target(t);
- return 0;
-}
-
-int log_set_max_level_from_string(const char *e) {
- int t;
-
- t = log_level_from_string(e);
- if (t < 0)
- return t;
-
- log_set_max_level(t);
- return 0;
-}
-
-void log_parse_environment(void) {
- const char *e;
-
- if ((e = getenv("SYSTEMD_LOG_TARGET")))
- if (log_set_target_from_string(e) < 0)
- log_warning("Failed to parse log target %s. Ignoring.", e);
-
- 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);
-
- if ((e = getenv("SYSTEMD_LOG_COLOR")))
- if (log_show_color_from_string(e) < 0)
- log_warning("Failed to parse bool %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);
-}
-
-LogTarget log_get_target(void) {
- return log_target;
-}
-
-int log_get_max_level(void) {
- return log_max_level;
-}
-
-void log_show_color(bool b) {
- show_color = b;
-}
-
-void log_show_location(bool b) {
- show_location = b;
-}
-
-int log_show_color_from_string(const char *e) {
- int t;
-
- t = parse_boolean(e);
- if (t < 0)
- return t;
-
- log_show_color(t);
- return 0;
-}
-
-int log_show_location_from_string(const char *e) {
- int t;
-
- t = parse_boolean(e);
- if (t < 0)
- return t;
-
- log_show_location(t);
- return 0;
-}
-
-static const char *const log_target_table[] = {
- [LOG_TARGET_CONSOLE] = "console",
- [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_AUTO] = "auto",
- [LOG_TARGET_NULL] = "null"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);