/usr/src/blcr-0.8.2/libcr/cr_trace.c is in blcr-dkms 0.8.2-15ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | /*
* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2003, The Regents of the University of California, through Lawrence
* Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
*
* Portions may be copyrighted by others, as may be noted in specific
* copyright notices within specific files.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: cr_trace.c,v 1.12 2008/08/27 21:16:07 phargrov Exp $
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <libgen.h>
#include "cr_private.h"
#define LIBCR_TRACE_MAX 256
static char libcr_trace_buf1[LIBCR_TRACE_MAX];
static char libcr_trace_buf2[LIBCR_TRACE_MAX];
static int libcr_trace_to_syslog = -1;
static int libcr_trace_fd = -1;
#if LIBCR_TRACING
// CHANGE THIS VALUE TO ENABLE TRACING
unsigned int libcr_trace_mask = LIBCR_TRACE_NONE;
void
libcr_trace_init(void)
{
const char *mask = getenv("LIBCR_TRACE_MASK");
if (mask) {
libcr_trace_mask = strtol(mask, NULL, 0);
}
}
#endif
void
libcr_trace(const char *filename, int line,
const char *function, const char * format, ...)
{
static cri_atomic_t done_init = {(unsigned int)0};
int saved_errno = errno;
char *tmpname, *shortname;
va_list args;
int len;
va_start(args, format);
vsnprintf(libcr_trace_buf1, LIBCR_TRACE_MAX, format, args);
va_end(args);
tmpname = strdup(filename);
shortname = basename(tmpname);
/* check destination stuff once */
if (!cri_atomic_read(&done_init)) {
static cr_spinlock_t lock = CR_SPINLOCK_INITIALIZER;
cr_spinlock_lock(&lock);
if (!cri_atomic_read(&done_init)) {
libcr_trace_to_syslog = (getenv("LIBCR_TRACE_TO_SYSLOG") != NULL);
if (!libcr_trace_to_syslog) {
char *file = getenv("LIBCR_TRACE_FILE");
if (file) {
libcr_trace_fd = open(file, O_WRONLY|O_APPEND|O_CREAT, 0644);
} else {
libcr_trace_fd = STDERR_FILENO; /* Default to stderr */
}
}
cri_atomic_write(&done_init, 1);
}
cr_spinlock_unlock(&lock);
}
if (libcr_trace_to_syslog) {
syslog(LOG_USER|LOG_NOTICE,
"[%d] %s:%d %s: %s", (int)getpid(), shortname, line, function, libcr_trace_buf1);
} else {
len = snprintf(libcr_trace_buf2, LIBCR_TRACE_MAX, "%s:%d %s: %s\n",
shortname, line, function, libcr_trace_buf1);
if (len > 0) {
if (len > LIBCR_TRACE_MAX) {
len = LIBCR_TRACE_MAX;
}
write(libcr_trace_fd, libcr_trace_buf2, len);
}
}
free(tmpname);
errno = saved_errno;
}
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