101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
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* This file is part of capwap-mitm.
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*
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* Foobar is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* capwap-mitm 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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*
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* You should have received a copy of the GNU General Public License
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* along with capwap-mitm. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <assert.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/time.h>
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#include "log.h"
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#if defined(DEBUG)
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static __thread int save_errno;
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static __thread size_t pos = 0;
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static __thread char buf[128 * 1024];
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static __thread int ctime_last = 0;
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static __thread char ctime_buf[27];
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void _debug(const char *filename, int line, const char *func, const char *fmt, ...)
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{
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va_list args;
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struct timeval tv;
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gettimeofday(&tv, NULL);
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_debug_head(filename, line, func, &tv);
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va_start(args, fmt);
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pos += vsnprintf(buf + pos, sizeof(buf) - pos, fmt, args);
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va_end(args);
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debug_flush();
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}
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void _debug_head(const char *filename, int line, const char *func, struct timeval *tv)
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{
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save_errno = errno;
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if (ctime_last != tv->tv_sec) {
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ctime_r(&tv->tv_sec, ctime_buf);
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ctime_last = tv->tv_sec;
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}
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pos += snprintf(buf + pos, sizeof(buf) - pos, "%.15s.%03ld %s:%d:%s: ",
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&ctime_buf[4], tv->tv_usec / 1000,
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filename, line, func);
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}
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void debug_log(const char *fmt, ...)
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{
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va_list args;
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/* make sure %m gets the right errno */
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errno = save_errno;
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va_start(args, fmt);
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pos += vsnprintf(buf + pos, sizeof(buf) - pos, fmt, args);
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va_end(args);
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assert(pos < sizeof(buf));
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}
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void debug_flush()
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{
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if (pos > 0 && pos < sizeof(buf) && buf[pos - 1] != '\n')
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buf[pos++] = '\n';
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if (write(STDERR_FILENO, buf, pos) < 0)
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;
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pos = 0;
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errno = save_errno;
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}
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#endif
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