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/* $OpenBSD: log.c,v 1.6 2014/04/19 18:31:33 claudio Exp $ */
/*
* Copyright (c) 2009 Claudio Jeker <claudio@openbsd.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <scsi/iscsi.h>
#include <errno.h>
#include <event.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "iscsid.h"
#include "log.h"
int debug;
int verbose;
void logit(int, const char *, ...);
void
log_init(int n_debug)
{
extern char *__progname;
debug = n_debug;
if (!debug)
openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
tzset();
}
void
log_verbose(int v)
{
verbose = v;
}
void
logit(int pri, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vlog(pri, fmt, ap);
va_end(ap);
}
void
vlog(int pri, const char *fmt, va_list ap)
{
char *nfmt;
if (debug) {
/* best effort in out of mem situations */
if (asprintf(&nfmt, "%s\n", fmt) == -1) {
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
} else {
vfprintf(stderr, nfmt, ap);
free(nfmt);
}
fflush(stderr);
} else
vsyslog(pri, fmt, ap);
}
void
log_warn(const char *emsg, ...)
{
char *nfmt;
va_list ap;
/* best effort to even work in out of memory situations */
if (emsg == NULL)
logit(LOG_CRIT, "%s", strerror(errno));
else {
va_start(ap, emsg);
if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
/* we tried it... */
vlog(LOG_CRIT, emsg, ap);
logit(LOG_CRIT, "%s", strerror(errno));
} else {
vlog(LOG_CRIT, nfmt, ap);
free(nfmt);
}
va_end(ap);
}
}
void
log_warnx(const char *emsg, ...)
{
va_list ap;
va_start(ap, emsg);
vlog(LOG_CRIT, emsg, ap);
va_end(ap);
}
void
log_info(const char *emsg, ...)
{
va_list ap;
va_start(ap, emsg);
vlog(LOG_INFO, emsg, ap);
va_end(ap);
}
void
log_debug(const char *emsg, ...)
{
va_list ap;
if (verbose) {
va_start(ap, emsg);
vlog(LOG_DEBUG, emsg, ap);
va_end(ap);
}
}
void
fatal(const char *emsg)
{
if (emsg == NULL)
logit(LOG_CRIT, "fatal: %s", strerror(errno));
else
if (errno)
logit(LOG_CRIT, "fatal: %s: %s", emsg, strerror(errno));
else
logit(LOG_CRIT, "fatal: %s", emsg);
exit(1);
}
void
fatalx(const char *emsg)
{
errno = 0;
fatal(emsg);
}
void
log_hexdump(void *buf, size_t len)
{
u_char b[16];
size_t i, j, l;
if (!debug)
return;
for (i = 0; i < len; i += l) {
fprintf(stderr, "%4zi:", i);
l = sizeof(b) < len - i ? sizeof(b) : len - i;
memcpy(b, (char *)buf + i, l);
for (j = 0; j < sizeof(b); j++) {
if (j % 2 == 0)
fprintf(stderr, " ");
if (j % 8 == 0)
fprintf(stderr, " ");
if (j < l)
fprintf(stderr, "%02x", (int)b[j]);
else
fprintf(stderr, " ");
}
fprintf(stderr, " |");
for (j = 0; j < l; j++) {
if (b[j] >= 0x20 && b[j] <= 0x7e)
fprintf(stderr, "%c", b[j]);
else
fprintf(stderr, ".");
}
fprintf(stderr, "|\n");
}
}
void
log_pdu(struct pdu *p, int all)
{
struct iscsi_pdu *pdu;
void *b;
size_t s;
if (!debug)
return;
if (!(pdu = pdu_getbuf(p, NULL, PDU_HEADER))) {
log_debug("empty pdu");
return;
}
fprintf(stderr, "PDU: op %x%s flags %02x%02x%02x ahs %d len %d\n",
ISCSI_PDU_OPCODE(pdu->opcode), ISCSI_PDU_I(pdu) ? " I" : "",
pdu->flags, pdu->_reserved1[0], pdu->_reserved1[1],
pdu->ahslen, pdu->datalen[0] << 16 | pdu->datalen[1] << 8 |
pdu->datalen[2]);
fprintf(stderr, " lun %02x%02x%02x%02x%02x%02x%02x%02x itt %u "
"cmdsn %u expstatsn %u\n", pdu->lun[0], pdu->lun[1], pdu->lun[2],
pdu->lun[3], pdu->lun[4], pdu->lun[5], pdu->lun[6], pdu->lun[7],
ntohl(pdu->itt), ntohl(pdu->cmdsn), ntohl(pdu->expstatsn));
log_hexdump(pdu, sizeof(*pdu));
if (all && (b = pdu_getbuf(p, &s, PDU_DATA)))
log_hexdump(b, s);
}
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