const char *rrd_strerror(
int err)
{
static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
rrd_context_t *ctx;
ctx = rrd_get_context();
pthread_mutex_lock(&mtx);
strncpy(ctx->lib_errstr, strerror(err), sizeof(ctx->lib_errstr));
ctx->lib_errstr[sizeof(ctx->lib_errstr) - 1] = '\0';
pthread_mutex_unlock(&mtx);
return ctx->lib_errstr;
}
const char *rrd_strerror(
int err)
{
rrd_context_t *ctx;
context_init_context();
ctx = rrd_get_context();
EnterCriticalSection(&CriticalSection);
strncpy(ctx->lib_errstr, strerror(err), sizeof(ctx->lib_errstr));
ctx->lib_errstr[sizeof(ctx->lib_errstr) - 1] = '\0';
LeaveCriticalSection(&CriticalSection);
return ctx->lib_errstr;
}
const char *rrd_strerror(
int err)
{
rrd_context_t *ctx = rrd_get_context();
char *ret = "unknown error";
*ctx->lib_errstr = '\0';
/* Even though POSIX/XSI requires "strerror_r" to return an "int", some
* systems (e.g. the GNU libc) return a "char *" _and_ ignore the second
* argument ... -tokkee */
#if STRERROR_R_CHAR_P
ret = strerror_r(err, ctx->lib_errstr, sizeof(ctx->lib_errstr));
if ((! ret) || (*ret == '\0')) {
if (*ctx->lib_errstr != '\0')
ret = ctx->lib_errstr;
else {
/* according to the manpage this should not happen -
let's handle it somehow sanely anyway */
snprintf(ctx->lib_errstr, sizeof(ctx->lib_errstr),
"unknown error %i - strerror_r did not return anything",
err);
ctx->lib_errstr[sizeof(ctx->lib_errstr) - 1] = '\0';
ret = ctx->lib_errstr;
}
}
#else /* ! STRERROR_R_CHAR_P */
if (strerror_r(err, ctx->lib_errstr, sizeof(ctx->lib_errstr))) {
snprintf(ctx->lib_errstr, sizeof(ctx->lib_errstr),
"unknown error %i - strerror_r returned with errno = %i",
err, errno);
ctx->lib_errstr[sizeof(ctx->lib_errstr) - 1] = '\0';
}
ret = ctx->lib_errstr;
#endif
return ret;
}
/*
* Called once per process to initialize the rrd lib.
*/
static ngx_int_t ngx_http_rrd_init_process(ngx_cycle_t *cycle) {
ARG_START_KEY = ngx_hash_key(ARG_START.data, ARG_START.len);
rrd_get_context();
ngx_log_error_core(NGX_LOG_DEBUG, cycle->log, 0, "rrd: init");
return NGX_OK;
}