/*
* Logging of zebra
* Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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, or (at your option) any
* later version.
*
* GNU Zebra 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define FRR_DEFINE_DESC_TABLE
#include <zebra.h>
#include "zclient.h"
#include "log.h"
#include "memory.h"
#include "command.h"
#include "lib_errors.h"
#include "lib/hook.h"
#include "printfrr.h"
#include "frr_pthread.h"
#ifdef HAVE_LIBUNWIND
#define UNW_LOCAL_ONLY
#include <libunwind.h>
#include <dlfcn.h>
#endif
/**
* Looks up a message in a message list by key.
*
* If the message is not found, returns the provided error message.
*
* Terminates when it hits a struct message that's all zeros.
*
* @param mz the message list
* @param kz the message key
* @param nf the message to return if not found
* @return the message
*/
const char *lookup_msg(const struct message *mz, int kz, const char *nf)
{
static struct message nt = {0};
const char *rz = nf ? nf : "(no message found)";
const struct message *pnt;
for (pnt = mz; memcmp(pnt, &nt, sizeof(struct message)); pnt++)
if (pnt->key == kz) {
rz = pnt->str ? pnt->str : rz;
break;
}
return rz;
}
/* For time string format. */
size_t quagga_timestamp(int timestamp_precision, char *buf, size_t buflen)
{
static struct {
time_t last;
size_t len;
char buf[28];
} cache;
struct timeval clock;
gettimeofday(&clock, NULL);
/* first, we update the cache if the time has changed */
if (cache.last != clock.tv_sec) {
struct tm tm;
cache.last = clock.tv_sec;
localtime_r(&cache.last, &tm);
cache.len = strftime(cache.buf, sizeof(cache.buf),
"%Y/%m/%d %H:%M:%S", &tm);
}
/* note: it's not worth caching the subsecond part, because
chances are that back-to-back calls are not sufficiently close
together
for the clock not to have ticked forward */
if (buflen > cache.len) {
memcpy(buf, cache.buf, cache.len);
if ((timestamp_precision > 0)
&& (buflen > cache.len + 1 + timestamp_precision)) {
/* should we worry about locale issues? */
static const int divisor[] = {0, 100000, 10000, 1000,
100, 10, 1};
int prec;
char *p = buf + cache.len + 1
+ (prec = timestamp_precision);
*p-- = '\0';
while (prec > 6)
/* this is unlikely to happen, but protect anyway */
{
*p-- = '0';
prec--;
}
clock.tv_usec /= divisor[prec];
do {
*p-- = '0' + (clock.tv_usec % 10);
clock.tv_usec /= 10;
} while (--prec > 0);
*p = '.';
return cache.len + 1 + timestamp_precision;
}
buf[cache.len] = '\0';
return cache.len;
}
if (buflen > 0)
buf[0] = '\0';
return 0;
}
/*
* crash handling
*
* NB: only AS-Safe (async-signal) functions can be used here!
*/
/* Note: the goal here is to use only async-signal-safe functions. */
void zlog_signal(int signo, const char *action, void *siginfo_v,
void *program_counter)
{
siginfo_t *siginfo = siginfo_v;
time_t now;
char buf[sizeof("DEFAULT: Received signal S at T (si_addr 0xP, PC 0xP); aborting...")
+ 100];
struct fbuf fb = { .buf = buf, .pos = buf, .len = sizeof(buf) };
time(&now);
bprintfrr(&fb, "Received signal %d at %lld", signo, (long long)now);
if (program_counter)
bprintfrr(&fb, " (si_addr 0x%tx, PC 0x%tx)",
(ptrdiff_t)siginfo->si_addr,
(ptrdiff_t)program_counter);
else
bprintfrr(&fb, " (si_addr 0x%tx)",
(ptrdiff_t)siginfo->si_addr);
bprintfrr(&fb, "; %s\n", action);
zlog_sigsafe(fb.buf, fb.pos - fb.buf);
zlog_backtrace_sigsafe(LOG_CRIT, program_counter);
fb.pos = buf;
struct thread *tc;
tc = pthread_getspecific(thread_current);
if (!tc)
bprintfrr(&fb, "no thread information available\n");
else
bprintfrr(&fb, "in thread %s scheduled from %s:%d\n",
tc->funcname, tc->schedfrom, tc->schedfrom_line);
zlog_sigsafe(fb.buf, fb.pos - fb.buf);
}
/* Log a backtrace using only async-signal-safe functions.
Needs to be enhanced to support syslog logging. */
void zlog_backtrace_sigsafe(int priority, void *program_counter)
{
#ifdef HAVE_LIBUNWIND
char buf[256];
struct fbuf fb = { .buf = buf, .len = sizeof(buf) };
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, off, sp;
Dl_info dlinfo;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
while (unw_step(&cursor) > 0) {
char name[128] = "?";
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
if (!unw_get_proc_name(&cursor, buf, sizeof(buf), &off))
snprintfrr(name, sizeof(name), "%s+%#lx",
buf, (long)off);
fb.pos = buf;
if (unw_is_signal_frame(&cursor))
bprintfrr(&fb, " ---- signal ----\n");
bprintfrr(&fb, "%-30s %16lx %16lx", name, (long)ip, (long)sp);
if (dladdr((void *)ip, &dlinfo))
bprintfrr(&fb, " %s (mapped at %p)",
dlinfo.dli_fname, dlinfo.dli_fbase);
bprintfrr(&fb, "\n");
zlog_sigsafe(fb.buf, fb.pos - fb.buf);
}
#elif defined(HAVE_GLIBC_BACKTRACE)
void *array[64];
int size, i;
char buf[128];
struct fbuf fb = { .buf = buf, .pos = buf, .len = sizeof(buf) };
char **bt = NULL;
size = backtrace(array, array_size(array));
if (size <= 0 || (size_t)size > array_size(array))
return;
bprintfrr(&fb, "Backtrace for %d stack frames:", size);
zlog_sigsafe(fb.pos, fb.buf - fb.pos);
bt = backtrace_symbols(array, size);
for (i = 0; i < size; i++) {
fb.pos = buf;
if (bt)
bprintfrr(&fb, "%s", bt[i]);
else
bprintfrr(&fb, "[bt %d] 0x%tx", i,
(ptrdiff_t)(array[i]));
zlog_sigsafe(fb.buf, fb.pos - fb.buf);
}
if (bt)
free(bt);
#endif /* HAVE_STRACK_TRACE */
}
void zlog_backtrace(int priority)
{
#ifdef HAVE_LIBUNWIND
char buf[100];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, off, sp;
Dl_info dlinfo;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
zlog(priority, "Backtrace:");
while (unw_step(&cursor) > 0) {
char name[128] = "?";
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
if (unw_is_signal_frame(&cursor))
zlog(priority, " ---- signal ----");
if (!unw_get_proc_name(&cursor, buf, sizeof(buf), &off))
snprintf(name, sizeof(name), "%s+%#lx",
buf, (long)off);
if (dladdr((void *)ip, &dlinfo))
zlog(priority, "%-30s %16lx %16lx %s (mapped at %p)",
name, (long)ip, (long)sp,
dlinfo.dli_fname, dlinfo.dli_fbase);
else
zlog(priority, "%-30s %16lx %16lx",
name, (long)ip, (long)sp);
}
#elif defined(HAVE_GLIBC_BACKTRACE)
void *array[20];
int size, i;
char **strings;
size = backtrace(array, array_size(array));
if (size <= 0 || (size_t)size > array_size(array)) {
flog_err_sys(
EC_LIB_SYSTEM_CALL,
"Cannot get backtrace, returned invalid # of frames %d (valid range is between 1 and %lu)",
size, (unsigned long)(array_size(array)));
return;
}
zlog(priority, "Backtrace for %d stack frames:", size);
if (!(strings = backtrace_symbols(array, size))) {
flog_err_sys(EC_LIB_SYSTEM_CALL,
"Cannot get backtrace symbols (out of memory?)");
for (i = 0; i < size; i++)
zlog(priority, "[bt %d] %p", i, array[i]);
} else {
for (i = 0; i < size; i++)
zlog(priority, "[bt %d] %s", i, strings[i]);
free(strings);
}
#else /* !HAVE_GLIBC_BACKTRACE && !HAVE_LIBUNWIND */
zlog(priority, "No backtrace available on this platform.");
#endif
}
void zlog_thread_info(int log_level)
{
struct thread *tc;
tc = pthread_getspecific(thread_current);
if (tc)
zlog(log_level,
"Current thread function %s, scheduled from file %s, line %u",
tc->funcname, tc->schedfrom, tc->schedfrom_line);
else
zlog(log_level, "Current thread not known/applicable");
}
void _zlog_assert_failed(const char *assertion, const char *file,
unsigned int line, const char *function)
{
zlog(LOG_CRIT, "Assertion `%s' failed in file %s, line %u, function %s",
assertion, file, line, (function ? function : "?"));
zlog_backtrace(LOG_CRIT);
zlog_thread_info(LOG_CRIT);
log_memstats(stderr, "log");
abort();
}
void memory_oom(size_t size, const char *name)
{
zlog(LOG_CRIT,
"out of memory: failed to allocate %zu bytes for %s object",
size, name);
zlog_backtrace(LOG_CRIT);
log_memstats(stderr, "log");
abort();
}
/* Wrapper around strerror to handle case where it returns NULL. */
const char *safe_strerror(int errnum)
{
const char *s = strerror(errnum);
return (s != NULL) ? s : "Unknown error";
}
#define DESC_ENTRY(T) [(T)] = { (T), (#T), '\0' }
static const struct zebra_desc_table command_types[] = {
DESC_ENTRY(ZEBRA_INTERFACE_ADD),
DESC_ENTRY(ZEBRA_INTERFACE_DELETE),
DESC_ENTRY(ZEBRA_INTERFACE_ADDRESS_ADD),
DESC_ENTRY(ZEBRA_INTERFACE_ADDRESS_DELETE),
DESC_ENTRY(ZEBRA_INTERFACE_UP),
DESC_ENTRY(ZEBRA_INTERFACE_DOWN),
DESC_ENTRY(ZEBRA_INTERFACE_SET_MASTER),
DESC_ENTRY(ZEBRA_ROUTE_ADD),
DESC_ENTRY(ZEBRA_ROUTE_DELETE),
DESC_ENTRY(ZEBRA_ROUTE_NOTIFY_OWNER),
DESC_ENTRY(ZEBRA_REDISTRIBUTE_ADD),
DESC_ENTRY(ZEBRA_REDISTRIBUTE_DELETE),
DESC_ENTRY(ZEBRA_REDISTRIBUTE_DEFAULT_ADD),
DESC_ENTRY(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE),
DESC_ENTRY(ZEBRA_ROUTER_ID_ADD),
DESC_ENTRY(ZEBRA_ROUTER_ID_DELETE),
DESC_ENTRY(ZEBRA_ROUTER_ID_UPDATE),
DESC_ENTRY(ZEBRA_HELLO),
DESC_ENTRY(ZEBRA_CAPABILITIES),
DESC_ENTRY(ZEBRA_NEXTHOP_REGISTER),
DESC_ENTRY(ZEBRA_NEXTHOP_UNREGISTER),
DESC_ENTRY(ZEBRA_NEXTHOP_UPDATE),
DESC_ENTRY(ZEBRA_INTERFACE_NBR_ADDRESS_ADD),
DESC_ENTRY(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE),
DESC_ENTRY(ZEBRA_INTERFACE_BFD_DEST_UPDATE),
DESC_ENTRY(ZEBRA_IMPORT_ROUTE_REGISTER),
DESC_ENTRY(ZEBRA_IMPORT_ROUTE_UNREGISTER),
DESC_ENTRY(ZEBRA_IMPORT_CHECK_UPDATE),
DESC_ENTRY(ZEBRA_BFD_DEST_REGISTER),
DESC_ENTRY(ZEBRA_BFD_DEST_DEREGISTER),
DESC_ENTRY(ZEBRA_BFD_DEST_UPDATE),
DESC_ENTRY(ZEBRA_BFD_DEST_REPLAY),
DESC_ENTRY(ZEBRA_REDISTRIBUTE_ROUTE_ADD),
DESC_ENTRY(ZEBRA_REDISTRIBUTE_ROUTE_DEL),
DESC_ENTRY(ZEBRA_VRF_UNREGISTER),
DESC_ENTRY(ZEBRA_VRF_ADD),
DESC_ENTRY(ZEBRA_VRF_DELETE),
DESC_ENTRY(ZEBRA_VRF_LABEL),
DESC_ENTRY(ZEBRA_INTERFACE_VRF_UPDATE),
DESC_ENTRY(ZEBRA_BFD_CLIENT_REGISTER),
DESC_ENTRY(ZEBRA_BFD_CLIENT_DEREGISTER),
DESC_ENTRY(ZEBRA_INTERFACE_ENABLE_RADV),
DESC_ENTRY(ZEBRA_INTERFACE_DISABLE_RADV),
DESC_ENTRY(ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB),
DESC_ENTRY(ZEBRA_INTERFACE_LINK_PARAMS),
DESC_ENTRY(ZEBRA_MPLS_LABELS_ADD),
DESC_ENTRY(ZEBRA_MPLS_LABELS_DELETE),
DESC_ENTRY(ZEBRA_MPLS_LABELS_REPLACE),
DESC_ENTRY(ZEBRA_SR_POLICY_SET),
DESC_ENTRY(ZEBRA_SR_POLICY_DELETE),
DESC_ENTRY(ZEBRA_SR_POLICY_NOTIFY_STATUS),
DESC_ENTRY(ZEBRA_IPMR_ROUTE_STATS),
DESC_ENTRY(ZEBRA_LABEL_MANAGER_CONNECT),
DESC_ENTRY(ZEBRA_LABEL_MANAGER_CONNECT_ASYNC),
DESC_ENTRY(ZEBRA_GET_LABEL_CHUNK),
DESC_ENTRY(ZEBRA_RELEASE_LABEL_CHUNK),
DESC_ENTRY(ZEBRA_FEC_REGISTER),
DESC_ENTRY(ZEBRA_FEC_UNREGISTER),
DESC_ENTRY(ZEBRA_FEC_UPDATE),
DESC_ENTRY(ZEBRA_ADVERTISE_ALL_VNI),
DESC_ENTRY(ZEBRA_ADVERTISE_DEFAULT_GW),
DESC_ENTRY(ZEBRA_ADVERTISE_SVI_MACIP),
DESC_ENTRY(ZEBRA_ADVERTISE_SUBNET),
DESC_ENTRY(ZEBRA_LOCAL_ES_ADD),
DESC_ENTRY(ZEBRA_LOCAL_ES_DEL),
DESC_ENTRY(ZEBRA_REMOTE_ES_VTEP_ADD),
DESC_ENTRY(ZEBRA_REMOTE_ES_VTEP_DEL),
DESC_ENTRY(ZEBRA_LOCAL_ES_EVI_ADD),
DESC_ENTRY(ZEBRA_LOCAL_ES_EVI_DEL),
DESC_ENTRY(ZEBRA_VNI_ADD),
DESC_ENTRY(ZEBRA_VNI_DEL),
DESC_ENTRY(ZEBRA_L3VNI_ADD),
DESC_ENTRY(ZEBRA_L3VNI_DEL),
DESC_ENTRY(ZEBRA_REMOTE_VTEP_ADD),
DESC_ENTRY(ZEBRA_REMOTE_VTEP_DEL),
DESC_ENTRY(ZEBRA_MACIP_ADD),
DESC_ENTRY(ZEBRA_MACIP_DEL),
DESC_ENTRY(ZEBRA_IP_PREFIX_ROUTE_ADD),
DESC_ENTRY(ZEBRA_IP_PREFIX_ROUTE_DEL),
DESC_ENTRY(ZEBRA_REMOTE_MACIP_ADD),
DESC_ENTRY(ZEBRA_REMOTE_MACIP_DEL),
DESC_ENTRY(ZEBRA_DUPLICATE_ADDR_DETECTION),
DESC_ENTRY(ZEBRA_PW_ADD),
DESC_ENTRY(ZEBRA_PW_DELETE),
DESC_ENTRY(ZEBRA_PW_SET),
DESC_ENTRY(ZEBRA_PW_UNSET),
DESC_ENTRY(ZEBRA_PW_STATUS_UPDATE),
DESC_ENTRY(ZEBRA_RULE_ADD),
DESC_ENTRY(ZEBRA_RULE_DELETE),
DESC_ENTRY(ZEBRA_RULE_NOTIFY_OWNER),
DESC_ENTRY(ZEBRA_TABLE_MANAGER_CONNECT),
DESC_ENTRY(ZEBRA_GET_TABLE_CHUNK),
DESC_ENTRY(ZEBRA_RELEASE_TABLE_CHUNK),
DESC_ENTRY(ZEBRA_IPSET_CREATE),
DESC_ENTRY(ZEBRA_IPSET_DESTROY),
DESC_ENTRY(ZEBRA_IPSET_ENTRY_ADD),
DESC_ENTRY(ZEBRA_IPSET_ENTRY_DELETE),
DESC_ENTRY(ZEBRA_IPSET_NOTIFY_OWNER),
DESC_ENTRY(ZEBRA_IPSET_ENTRY_NOTIFY_OWNER),
DESC_ENTRY(ZEBRA_IPTABLE_ADD),
DESC_ENTRY(ZEBRA_IPTABLE_DELETE),
DESC_ENTRY(ZEBRA_IPTABLE_NOTIFY_OWNER),
DESC_ENTRY(ZEBRA_VXLAN_FLOOD_CONTROL),
DESC_ENTRY(ZEBRA_VXLAN_SG_ADD),
DESC_ENTRY(ZEBRA_VXLAN_SG_DEL),
DESC_ENTRY(ZEBRA_VXLAN_SG_REPLAY),
DESC_ENTRY(ZEBRA_MLAG_PROCESS_UP),
DESC_ENTRY(ZEBRA_MLAG_PROCESS_DOWN),
DESC_ENTRY(ZEBRA_MLAG_CLIENT_REGISTER),
DESC_ENTRY(ZEBRA_MLAG_CLIENT_UNREGISTER),
DESC_ENTRY(ZEBRA_MLAG_FORWARD_MSG),
DESC_ENTRY(ZEBRA_ERROR),
DESC_ENTRY(ZEBRA_CLIENT_CAPABILITIES),
DESC_ENTRY(ZEBRA_OPAQUE_MESSAGE),
DESC_ENTRY(ZEBRA_OPAQUE_REGISTER),
DESC_ENTRY(ZEBRA_OPAQUE_UNREGISTER),
DESC_ENTRY(ZEBRA_NEIGH_DISCOVER)};
#undef DESC_ENTRY
static const struct zebra_desc_table unknown = {0, "unknown", '?'};
static const struct zebra_desc_table *zroute_lookup(unsigned int zroute)
{
unsigned int i;
if (zroute >= array_size(route_types)) {
flog_err(EC_LIB_DEVELOPMENT, "unknown zebra route type: %u",
zroute);
return &unknown;
}
if (zroute == route_types[zroute].type)
return &route_types[zroute];
for (i = 0; i < array_size(route_types); i++) {
if (zroute == route_types[i].type) {
zlog_warn(
"internal error: route type table out of order while searching for %u, please notify developers",
zroute);
return &route_types[i];
}
}
flog_err(EC_LIB_DEVELOPMENT,
"internal error: cannot find route type %u in table!", zroute);
return &unknown;
}
const char *zebra_route_string(unsigned int zroute)
{
return zroute_lookup(zroute)->string;
}
char zebra_route_char(unsigned int zroute)
{
return zroute_lookup(zroute)->chr;
}
const char *zserv_command_string(unsigned int command)
{
if (command >= array_size(command_types)) {
flog_err(EC_LIB_DEVELOPMENT, "unknown zserv command type: %u",
command);
return unknown.string;
}
return command_types[command].string;
}
int proto_name2num(const char *s)
{
unsigned i;
for (i = 0; i < array_size(route_types); ++i)
if (strcasecmp(s, route_types[i].string) == 0)
return route_types[i].type;
return -1;
}
int proto_redistnum(int afi, const char *s)
{
if (!s)
return -1;
if (afi == AFI_IP) {
if (strmatch(s, "kernel"))
return ZEBRA_ROUTE_KERNEL;
else if (strmatch(s, "connected"))
return ZEBRA_ROUTE_CONNECT;
else if (strmatch(s, "static"))
return ZEBRA_ROUTE_STATIC;
else if (strmatch(s, "rip"))
return ZEBRA_ROUTE_RIP;
else if (strmatch(s, "eigrp"))
return ZEBRA_ROUTE_EIGRP;
else if (strmatch(s, "ospf"))
return ZEBRA_ROUTE_OSPF;
else if (strmatch(s, "isis"))
return ZEBRA_ROUTE_ISIS;
else if (strmatch(s, "bgp"))
return ZEBRA_ROUTE_BGP;
else if (strmatch(s, "table"))
return ZEBRA_ROUTE_TABLE;
else if (strmatch(s, "vnc"))
return ZEBRA_ROUTE_VNC;
else if (strmatch(s, "vnc-direct"))
return ZEBRA_ROUTE_VNC_DIRECT;
else if (strmatch(s, "nhrp"))
return ZEBRA_ROUTE_NHRP;
else if (strmatch(s, "babel"))
return ZEBRA_ROUTE_BABEL;
else if (strmatch(s, "sharp"))
return ZEBRA_ROUTE_SHARP;
else if (strmatch(s, "openfabric"))
return ZEBRA_ROUTE_OPENFABRIC;
}
if (afi == AFI_IP6) {
if (strmatch(s, "kernel"))
return ZEBRA_ROUTE_KERNEL;
else if (strmatch(s, "connected"))
return ZEBRA_ROUTE_CONNECT;
else if (strmatch(s, "static"))
return ZEBRA_ROUTE_STATIC;
else if (strmatch(s, "ripng"))
return ZEBRA_ROUTE_RIPNG;
else if (strmatch(s, "ospf6"))
return ZEBRA_ROUTE_OSPF6;
else if (strmatch(s, "isis"))
return ZEBRA_ROUTE_ISIS;
else if (strmatch(s, "bgp"))
return ZEBRA_ROUTE_BGP;
else if (strmatch(s, "table"))
return ZEBRA_ROUTE_TABLE;
else if (strmatch(s, "vnc"))
return ZEBRA_ROUTE_VNC;
else if (strmatch(s, "vnc-direct"))
return ZEBRA_ROUTE_VNC_DIRECT;
else if (strmatch(s, "nhrp"))
return ZEBRA_ROUTE_NHRP;
else if (strmatch(s, "babel"))
return ZEBRA_ROUTE_BABEL;
else if (strmatch(s, "sharp"))
return ZEBRA_ROUTE_SHARP;
else if (strmatch(s, "openfabric"))
return ZEBRA_ROUTE_OPENFABRIC;
}
return -1;
}
void zlog_hexdump(const void *mem, size_t len)
{
char line[64];
const uint8_t *src = mem;
const uint8_t *end = src + len;
if (len == 0) {
zlog_debug("%016lx: (zero length / no data)", (long)src);
return;
}
while (src < end) {
struct fbuf fb = {
.buf = line,
.pos = line,
.len = sizeof(line),
};
const uint8_t *lineend = src + 8;
unsigned line_bytes = 0;
bprintfrr(&fb, "%016lx: ", (long)src);
while (src < lineend && src < end) {
bprintfrr(&fb, "%02x ", *src++);
line_bytes++;
}
if (line_bytes < 8)
bprintfrr(&fb, "%*s", (8 - line_bytes) * 3, "");
src -= line_bytes;
while (src < lineend && src < end && fb.pos < fb.buf + fb.len) {
uint8_t byte = *src++;
if (isprint(byte))
*fb.pos++ = byte;
else
*fb.pos++ = '.';
}
zlog_debug("%.*s", (int)(fb.pos - fb.buf), fb.buf);
}
}
const char *zlog_sanitize(char *buf, size_t bufsz, const void *in, size_t inlen)
{
const char *inbuf = in;
char *pos = buf, *end = buf + bufsz;
const char *iend = inbuf + inlen;
memset(buf, 0, bufsz);
for (; inbuf < iend; inbuf++) {
/* don't write partial escape sequence */
if (end - pos < 5)
break;
if (*inbuf == '\n')
snprintf(pos, end - pos, "\\n");
else if (*inbuf == '\r')
snprintf(pos, end - pos, "\\r");
else if (*inbuf == '\t')
snprintf(pos, end - pos, "\\t");
else if (*inbuf < ' ' || *inbuf == '"' || *inbuf >= 127)
snprintf(pos, end - pos, "\\x%02hhx", *inbuf);
else
*pos = *inbuf;
pos += strlen(pos);
}
return buf;
}