2012-05-14 09:02:10 +00:00
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/*
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2012-07-30 03:28:21 +00:00
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Serval logging.
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Copyright (C) 2012 Serval Project Inc.
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2012-05-14 09:02:10 +00:00
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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2012-07-25 07:32:15 +00:00
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#include <stdlib.h>
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2012-07-19 08:29:45 +00:00
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#include <stdio.h>
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2012-05-20 14:38:31 +00:00
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#include <ctype.h>
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2012-07-11 04:48:36 +00:00
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#include <sys/time.h>
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2012-07-25 07:32:15 +00:00
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#include <sys/types.h>
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#include <sys/wait.h>
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2012-09-05 09:23:22 +00:00
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#include <sys/param.h>
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2012-07-11 04:48:36 +00:00
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#include <time.h>
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2012-07-25 08:49:32 +00:00
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#ifdef __APPLE__
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#include <mach-o/dyld.h>
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#endif
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2012-07-29 03:05:53 +00:00
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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2012-09-06 05:56:40 +00:00
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#include <stdint.h>
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2012-11-14 01:54:29 +00:00
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#include <assert.h>
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2012-05-14 09:02:10 +00:00
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2012-08-06 07:30:33 +00:00
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#include "log.h"
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2012-08-23 03:01:07 +00:00
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#include "net.h"
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2013-02-25 04:55:53 +00:00
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#include "os.h"
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2012-08-06 07:30:33 +00:00
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#include "conf.h"
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2012-11-20 03:13:51 +00:00
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#include "str.h"
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2012-08-06 07:30:33 +00:00
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#include "strbuf.h"
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#include "strbuf_helpers.h"
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2012-10-16 06:16:52 +00:00
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const struct __sourceloc __whence = __NOWHERE__;
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2012-06-28 08:04:21 +00:00
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static FILE *logfile = NULL;
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2012-07-05 05:29:50 +00:00
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/* The logbuf is used to accumulate log messages before the log file is open and ready for
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writing.
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*/
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static char _log_buf[8192];
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static struct strbuf logbuf = STRUCT_STRBUF_EMPTY;
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2012-05-14 09:02:10 +00:00
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#ifdef ANDROID
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2012-07-25 08:34:16 +00:00
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#include <android/log.h>
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2012-05-14 09:02:10 +00:00
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#endif
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2012-07-19 08:29:45 +00:00
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void set_logging(FILE *f)
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{
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logfile = f;
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if (f == stdout)
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INFO("Logging to stdout");
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else if (f == stderr)
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INFO("Logging to stderr");
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else if (f != NULL)
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INFOF("Logging to stream with fd=%d", fileno(f));
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}
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2012-11-14 01:54:29 +00:00
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static FILE *_open_logging()
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2012-06-22 07:49:14 +00:00
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{
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2012-07-27 10:29:16 +00:00
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#ifdef ANDROID
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return NULL;
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#endif
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2012-06-28 08:04:21 +00:00
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if (!logfile) {
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2012-07-05 05:29:50 +00:00
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const char *logpath = getenv("SERVALD_LOG_FILE");
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if (!logpath) {
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2012-12-04 03:42:28 +00:00
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if (cf_limbo)
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2012-07-05 05:29:50 +00:00
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return NULL;
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2012-12-04 03:42:28 +00:00
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logpath = config.log.file;
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2012-07-05 05:29:50 +00:00
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}
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2012-12-04 03:42:28 +00:00
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if (!logpath || !logpath[0]) {
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2013-01-23 04:23:26 +00:00
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logfile = stderr;
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2012-07-05 05:29:50 +00:00
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INFO("No logfile configured -- logging to stderr");
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2012-06-28 08:04:21 +00:00
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} else {
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2013-01-23 04:23:26 +00:00
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char path[1024];
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if (!FORM_SERVAL_INSTANCE_PATH(path, logpath)) {
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logfile = stderr;
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INFO("Logfile path overrun -- logging to stderr");
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} else if ((logfile = fopen(path, "a"))) {
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setlinebuf(logfile);
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INFOF("Logging to %s (fd %d)", path, fileno(logfile));
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} else {
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logfile = stderr;
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WARNF_perror("fopen(%s)", path);
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WARNF("Cannot append to %s -- falling back to stderr", path);
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}
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2012-06-28 08:04:21 +00:00
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}
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2012-06-22 07:49:14 +00:00
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}
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2012-06-28 08:04:21 +00:00
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return logfile;
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}
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2012-11-14 01:54:29 +00:00
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FILE *open_logging()
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{
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2012-11-15 02:08:17 +00:00
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return _open_logging();
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2012-11-14 01:54:29 +00:00
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}
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2012-06-28 08:04:21 +00:00
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void close_logging()
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{
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if (logfile) {
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fclose(logfile);
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logfile = NULL;
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2012-06-28 05:54:43 +00:00
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}
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2012-06-22 07:49:14 +00:00
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}
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2012-07-27 08:20:40 +00:00
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static const char *_trimbuildpath(const char *path)
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2012-05-14 09:02:10 +00:00
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{
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2012-07-27 08:20:40 +00:00
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/* Remove common path prefix */
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int lastsep = 0;
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int i;
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for (i = 0; __FILE__[i] && path[i]; ++i) {
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if (i && path[i - 1] == '/')
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lastsep = i;
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if (__FILE__[i] != path[i])
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break;
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}
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return &path[lastsep];
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2012-05-14 09:02:10 +00:00
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}
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2012-10-16 06:16:52 +00:00
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static int _log_prepare(int level, struct __sourceloc whence)
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2012-05-14 09:02:10 +00:00
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{
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2012-07-27 08:20:40 +00:00
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if (level == LOG_LEVEL_SILENT)
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return 0;
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2012-11-15 02:08:17 +00:00
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struct timeval tv;
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tv.tv_sec = 0;
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2012-12-04 03:42:28 +00:00
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if (config.log.show_time)
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2012-11-15 02:08:17 +00:00
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gettimeofday(&tv, NULL);
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_open_logging(); // Put initial INFO message at start of log file
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2012-11-14 01:54:29 +00:00
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// No calls outside log.c from this point on.
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2012-11-15 02:08:17 +00:00
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if (strbuf_is_empty(&logbuf))
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strbuf_init(&logbuf, _log_buf, sizeof _log_buf);
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else if (strbuf_len(&logbuf))
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2012-11-14 01:54:29 +00:00
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strbuf_putc(&logbuf, '\n');
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2012-07-27 10:29:16 +00:00
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#ifndef ANDROID
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2012-07-27 08:20:40 +00:00
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const char *levelstr = "UNKWN:";
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switch (level) {
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case LOG_LEVEL_FATAL: levelstr = "FATAL:"; break;
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case LOG_LEVEL_ERROR: levelstr = "ERROR:"; break;
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case LOG_LEVEL_INFO: levelstr = "INFO:"; break;
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case LOG_LEVEL_WARN: levelstr = "WARN:"; break;
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case LOG_LEVEL_DEBUG: levelstr = "DEBUG:"; break;
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}
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strbuf_sprintf(&logbuf, "%-6.6s ", levelstr);
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2012-07-11 06:34:21 +00:00
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#endif
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2012-12-04 03:42:28 +00:00
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if (config.log.show_pid)
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2012-07-27 08:20:40 +00:00
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strbuf_sprintf(&logbuf, "[%5u] ", getpid());
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2012-12-04 03:42:28 +00:00
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if (config.log.show_time) {
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2012-11-15 02:08:17 +00:00
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if (tv.tv_sec == 0) {
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2012-07-27 08:20:40 +00:00
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strbuf_puts(&logbuf, "NOTIME______ ");
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} else {
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struct tm tm;
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char buf[20];
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if (strftime(buf, sizeof buf, "%T", localtime_r(&tv.tv_sec, &tm)) == 0)
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strbuf_puts(&logbuf, "EMPTYTIME___ ");
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else
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strbuf_sprintf(&logbuf, "%s.%03u ", buf, tv.tv_usec / 1000);
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2012-07-26 07:21:59 +00:00
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}
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2012-07-27 08:20:40 +00:00
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}
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2012-10-16 06:16:52 +00:00
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if (whence.file) {
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strbuf_sprintf(&logbuf, "%s", _trimbuildpath(whence.file));
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if (whence.line)
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strbuf_sprintf(&logbuf, ":%u", whence.line);
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if (whence.function)
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strbuf_sprintf(&logbuf, ":%s()", whence.function);
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2012-07-26 07:21:59 +00:00
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strbuf_putc(&logbuf, ' ');
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2012-10-16 06:16:52 +00:00
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} else if (whence.function) {
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strbuf_sprintf(&logbuf, "%s() ", whence.function);
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2012-07-27 08:20:40 +00:00
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}
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strbuf_putc(&logbuf, ' ');
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return 1;
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}
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2012-12-14 01:09:08 +00:00
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/* Internal logging implementation.
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*
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* This function is called after every single log message is appended to logbuf, and is given the
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* level of the message. This function must reset the given strbuf after its contents have been
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* sent to the log, otherwise log messages will be repeated. If this function never resets the
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* strbuf, then it may eventually overrun.
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*
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* This function is also called to flush the given logbuf, by giving a log level of SILENT. That
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* indicates that no new message has been appended since the last time this function was called.
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*
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* @author Andrew Bettison <andrew@servalproject.com>
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*/
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2012-08-23 03:01:07 +00:00
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static void _log_internal(int level, struct strbuf *buf)
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{
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2012-05-14 09:02:10 +00:00
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#ifdef ANDROID
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2012-07-27 08:20:40 +00:00
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int alevel = ANDROID_LOG_UNKNOWN;
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switch (level) {
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case LOG_LEVEL_FATAL: alevel = ANDROID_LOG_FATAL; break;
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case LOG_LEVEL_ERROR: alevel = ANDROID_LOG_ERROR; break;
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case LOG_LEVEL_INFO: alevel = ANDROID_LOG_INFO; break;
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case LOG_LEVEL_WARN: alevel = ANDROID_LOG_WARN; break;
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case LOG_LEVEL_DEBUG: alevel = ANDROID_LOG_DEBUG; break;
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2012-12-14 01:09:08 +00:00
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case LOG_LEVEL_SILENT: return;
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default: abort();
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2012-07-27 08:20:40 +00:00
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}
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2012-08-08 01:26:05 +00:00
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__android_log_print(alevel, "servald", "%s", strbuf_str(buf));
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strbuf_reset(buf);
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2012-07-05 05:29:50 +00:00
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#else
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2012-11-14 01:54:29 +00:00
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FILE *logf = _open_logging();
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2012-07-27 08:20:40 +00:00
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if (logf) {
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2012-12-14 01:09:08 +00:00
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fprintf(logf, "%s%s%s", strbuf_str(buf), strbuf_len(buf) ? "\n" : "", strbuf_overrun(buf) ? "LOG OVERRUN\n" : "");
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2012-08-08 01:26:05 +00:00
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strbuf_reset(buf);
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2012-07-27 08:20:40 +00:00
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}
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2012-07-05 05:29:50 +00:00
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#endif
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2012-07-27 08:20:40 +00:00
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}
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2012-08-23 03:01:07 +00:00
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void (*_log_implementation)(int level, struct strbuf *buf) = _log_internal;
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2012-08-08 01:26:05 +00:00
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2012-08-23 03:01:07 +00:00
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static void _log_finish(int level)
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{
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if (_log_implementation)
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2012-08-08 01:26:05 +00:00
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_log_implementation(level, &logbuf);
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}
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2012-08-23 03:01:07 +00:00
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void set_log_implementation(void (*log_function)(int level, struct strbuf *buf))
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{
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2012-08-08 01:26:05 +00:00
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_log_implementation=log_function;
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}
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2012-12-14 01:09:08 +00:00
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void logFlush()
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{
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if (_log_implementation)
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_log_implementation(LOG_LEVEL_SILENT, &logbuf);
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}
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2012-10-16 06:16:52 +00:00
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void logArgv(int level, struct __sourceloc whence, const char *label, int argc, const char *const *argv)
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2012-07-27 08:20:40 +00:00
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{
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2012-10-16 06:16:52 +00:00
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if (_log_prepare(level, whence)) {
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2012-07-27 08:29:33 +00:00
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if (label) {
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strbuf_puts(&logbuf, label);
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strbuf_putc(&logbuf, ' ');
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}
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2012-12-03 23:17:39 +00:00
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strbuf_append_argv(&logbuf, argc, argv);
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2012-07-27 08:20:40 +00:00
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_log_finish(level);
|
2012-05-14 09:02:10 +00:00
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}
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}
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2012-10-16 06:16:52 +00:00
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void logString(int level, struct __sourceloc whence, const char *str)
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2012-08-01 08:22:38 +00:00
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{
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const char *s = str;
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const char *p;
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for (p = str; *p; ++p) {
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if (*p == '\n') {
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2012-10-16 06:16:52 +00:00
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if (_log_prepare(level, whence)) {
|
2012-08-03 03:42:54 +00:00
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strbuf_ncat(&logbuf, s, p - s);
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2012-08-01 08:22:38 +00:00
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_log_finish(level);
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}
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s = p + 1;
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}
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}
|
2012-10-16 06:16:52 +00:00
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if (p > s && _log_prepare(level, whence)) {
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2012-08-03 03:42:54 +00:00
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strbuf_ncat(&logbuf, s, p - s);
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2012-08-01 08:22:38 +00:00
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_log_finish(level);
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}
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}
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2012-10-16 06:16:52 +00:00
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void logMessage(int level, struct __sourceloc whence, const char *fmt, ...)
|
2012-05-22 00:24:10 +00:00
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{
|
2012-07-27 08:20:40 +00:00
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va_list ap;
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va_start(ap, fmt);
|
2012-10-16 06:16:52 +00:00
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vlogMessage(level, whence, fmt, ap);
|
2012-07-27 08:20:40 +00:00
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va_end(ap);
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}
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2012-10-16 06:16:52 +00:00
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void vlogMessage(int level, struct __sourceloc whence, const char *fmt, va_list ap)
|
2012-07-27 08:20:40 +00:00
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{
|
2012-10-16 06:16:52 +00:00
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if (_log_prepare(level, whence)) {
|
2012-07-27 08:20:40 +00:00
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strbuf_vsprintf(&logbuf, fmt, ap);
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_log_finish(level);
|
2012-05-22 00:24:10 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-10-16 06:16:52 +00:00
|
|
|
int logDump(int level, struct __sourceloc whence, char *name, const unsigned char *addr, size_t len)
|
2012-05-14 09:02:10 +00:00
|
|
|
{
|
2012-06-22 07:49:14 +00:00
|
|
|
char buf[100];
|
2012-07-03 06:06:51 +00:00
|
|
|
size_t i;
|
2012-07-31 06:50:09 +00:00
|
|
|
if (name)
|
2012-10-16 06:16:52 +00:00
|
|
|
logMessage(level, whence, "Dump of %s", name);
|
2012-06-22 07:49:14 +00:00
|
|
|
for(i = 0; i < len; i += 16) {
|
|
|
|
strbuf b = strbuf_local(buf, sizeof buf);
|
|
|
|
strbuf_sprintf(b, " %04x :", i);
|
2012-07-03 06:06:51 +00:00
|
|
|
int j;
|
2012-06-22 07:49:14 +00:00
|
|
|
for (j = 0; j < 16 && i + j < len; j++)
|
|
|
|
strbuf_sprintf(b, " %02x", addr[i + j]);
|
|
|
|
for (; j < 16; j++)
|
|
|
|
strbuf_puts(b, " ");
|
|
|
|
strbuf_puts(b, " ");
|
|
|
|
for (j = 0; j < 16 && i + j < len; j++)
|
|
|
|
strbuf_sprintf(b, "%c", addr[i+j] >= ' ' && addr[i+j] < 0x7f ? addr[i+j] : '.');
|
2012-10-16 06:16:52 +00:00
|
|
|
logMessage(level, whence, "%s", strbuf_str(b));
|
2012-06-22 07:49:14 +00:00
|
|
|
}
|
2012-05-14 09:02:10 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-07-25 07:32:15 +00:00
|
|
|
ssize_t get_self_executable_path(char *buf, size_t len)
|
|
|
|
{
|
2012-09-05 22:22:22 +00:00
|
|
|
#if defined(linux)
|
2012-07-25 07:32:15 +00:00
|
|
|
return read_symlink("/proc/self/exe", buf, len);
|
2012-09-05 22:22:22 +00:00
|
|
|
#elif defined (__sun__)
|
|
|
|
return read_symlink("/proc/self/path/a.out", buf, len);
|
|
|
|
#elif defined (__APPLE__)
|
2012-07-25 08:49:32 +00:00
|
|
|
uint32_t bufsize = len;
|
|
|
|
return _NSGetExecutablePath(buf, &bufsize) == -1 && len ? -1 : bufsize;
|
2012-09-05 22:22:22 +00:00
|
|
|
#else
|
|
|
|
#error Unable to find executable path
|
2012-07-25 07:32:15 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2012-10-16 06:16:52 +00:00
|
|
|
int log_backtrace(struct __sourceloc whence)
|
2012-07-25 07:32:15 +00:00
|
|
|
{
|
2013-02-14 03:48:56 +00:00
|
|
|
#ifndef NO_BACKTRACE
|
2012-07-25 07:32:15 +00:00
|
|
|
open_logging();
|
2012-09-05 09:23:22 +00:00
|
|
|
char execpath[MAXPATHLEN];
|
2012-07-25 07:32:15 +00:00
|
|
|
if (get_self_executable_path(execpath, sizeof execpath) == -1)
|
|
|
|
return WHY("cannot log backtrace: own executable path unknown");
|
2012-09-05 09:23:22 +00:00
|
|
|
char tempfile[MAXPATHLEN];
|
2012-10-18 06:50:50 +00:00
|
|
|
if (!FORM_SERVAL_INSTANCE_PATH(tempfile, "servalgdb.XXXXXX"))
|
2012-07-27 10:29:16 +00:00
|
|
|
return -1;
|
2012-09-05 09:23:22 +00:00
|
|
|
int tmpfd = mkstemp(tempfile);
|
2012-07-25 07:32:15 +00:00
|
|
|
if (tmpfd == -1)
|
2012-10-18 06:50:50 +00:00
|
|
|
return WHYF_perror("mkstemp(%s)", alloca_str_toprint(tempfile));
|
2012-07-25 07:32:15 +00:00
|
|
|
if (write_str(tmpfd, "backtrace\n") == -1) {
|
|
|
|
close(tmpfd);
|
|
|
|
unlink(tempfile);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
if (close(tmpfd) == -1) {
|
|
|
|
WHY_perror("close");
|
|
|
|
unlink(tempfile);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
char pidstr[12];
|
2012-09-05 09:23:22 +00:00
|
|
|
snprintf(pidstr, sizeof pidstr, "%jd", (intmax_t)getpid());
|
2012-07-25 07:32:15 +00:00
|
|
|
int stdout_fds[2];
|
|
|
|
if (pipe(stdout_fds) == -1)
|
|
|
|
return WHY_perror("pipe");
|
|
|
|
pid_t child_pid;
|
|
|
|
switch (child_pid = fork()) {
|
|
|
|
case -1: // error
|
|
|
|
WHY_perror("fork");
|
|
|
|
close(stdout_fds[0]);
|
|
|
|
close(stdout_fds[1]);
|
|
|
|
return WHY("cannot log backtrace: fork failed");
|
|
|
|
case 0: // child
|
2012-07-26 07:21:59 +00:00
|
|
|
if (dup2(stdout_fds[1], 1) == -1 || dup2(stdout_fds[1], 2) == -1) {
|
|
|
|
perror("dup2");
|
2012-07-25 07:32:15 +00:00
|
|
|
_exit(-1);
|
2012-07-26 07:21:59 +00:00
|
|
|
}
|
2012-07-25 07:32:15 +00:00
|
|
|
close(0);
|
2012-07-26 07:21:59 +00:00
|
|
|
if (open("/dev/null", O_RDONLY) != 0) {
|
|
|
|
perror("open(\"/dev/null\")");
|
2012-07-25 07:32:15 +00:00
|
|
|
_exit(-2);
|
2012-07-26 07:21:59 +00:00
|
|
|
}
|
2012-07-25 07:32:15 +00:00
|
|
|
close(stdout_fds[0]);
|
2012-09-05 09:23:22 +00:00
|
|
|
/* XXX: Need the cast on Solaris because it defins NULL as 0L and gcc doesn't
|
|
|
|
* see it as a sentinal */
|
|
|
|
execlp("gdb", "gdb", "-n", "-batch", "-x", tempfile, execpath, pidstr, (void*)NULL);
|
2012-07-26 07:21:59 +00:00
|
|
|
perror("execlp(\"gdb\")");
|
2012-07-25 07:32:15 +00:00
|
|
|
do { _exit(-3); } while (1);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
// parent
|
|
|
|
close(stdout_fds[1]);
|
2012-10-16 06:16:52 +00:00
|
|
|
logMessage(LOG_LEVEL_DEBUG, whence, "GDB BACKTRACE");
|
2012-07-26 07:21:59 +00:00
|
|
|
char buf[1024];
|
|
|
|
char *const bufe = buf + sizeof buf;
|
|
|
|
char *linep = buf;
|
|
|
|
char *readp = buf;
|
2012-07-25 07:32:15 +00:00
|
|
|
ssize_t nr;
|
2012-07-26 07:21:59 +00:00
|
|
|
while ((nr = read(stdout_fds[0], readp, bufe - readp)) > 0) {
|
|
|
|
char *p = readp;
|
|
|
|
readp = readp + nr;
|
|
|
|
for (; p < readp; ++p)
|
|
|
|
if (*p == '\n' || *p == '\0') {
|
|
|
|
*p = '\0';
|
2012-08-23 03:01:07 +00:00
|
|
|
logMessage(LOG_LEVEL_DEBUG, __NOWHERE__, "%s", linep);
|
2012-07-26 07:21:59 +00:00
|
|
|
linep = p + 1;
|
|
|
|
}
|
|
|
|
if (readp >= bufe && linep == buf) {
|
|
|
|
// Line does not fit into buffer.
|
|
|
|
char t = bufe[-1];
|
|
|
|
bufe[-1] = '\0';
|
2012-08-23 03:01:07 +00:00
|
|
|
logMessage(LOG_LEVEL_DEBUG, __NOWHERE__, "%s", buf);
|
2012-07-26 07:21:59 +00:00
|
|
|
buf[0] = t;
|
|
|
|
readp = buf + 1;
|
|
|
|
} else if (readp + 120 >= bufe && linep != buf) {
|
|
|
|
// Buffer low on space.
|
|
|
|
if (linep < readp)
|
|
|
|
memmove(buf, linep, readp - linep);
|
|
|
|
readp -= linep - buf;
|
|
|
|
linep = buf;
|
|
|
|
}
|
|
|
|
// Invariant: readp < bufe
|
|
|
|
}
|
2012-07-25 07:32:15 +00:00
|
|
|
if (nr == -1)
|
|
|
|
WHY_perror("read");
|
2012-07-26 07:21:59 +00:00
|
|
|
if (readp > linep) {
|
|
|
|
*readp = '\0';
|
2012-08-23 03:01:07 +00:00
|
|
|
logMessage(LOG_LEVEL_DEBUG, __NOWHERE__, "%s", linep);
|
2012-07-26 07:21:59 +00:00
|
|
|
}
|
2012-07-25 07:32:15 +00:00
|
|
|
close(stdout_fds[0]);
|
|
|
|
int status = 0;
|
|
|
|
if (waitpid(child_pid, &status, 0) == -1)
|
|
|
|
WHY_perror("waitpid");
|
2012-07-26 07:21:59 +00:00
|
|
|
strbuf b = strbuf_local(buf, sizeof buf);
|
|
|
|
strbuf_append_exit_status(b, status);
|
2012-08-23 03:01:07 +00:00
|
|
|
logMessage(LOG_LEVEL_DEBUG, __NOWHERE__, "gdb %s", buf);
|
2012-07-25 07:32:15 +00:00
|
|
|
unlink(tempfile);
|
2013-02-14 03:48:56 +00:00
|
|
|
#endif
|
2012-07-25 07:32:15 +00:00
|
|
|
return 0;
|
|
|
|
}
|