mirror of
https://github.com/nginx/nginx.git
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c2068d08f0
*) Change: the "bl" and "af" parameters of the "listen" directive was
renamed to the "backlog" and "accept_filter".
*) Feature: the "rcvbuf" and "sndbuf" parameters of the "listen"
directive.
*) Change: the "$msec" log parameter does not require now the
additional the gettimeofday() system call.
*) Feature: the -t switch now tests the "listen" directives.
*) Bugfix: if the invalid address was specified in the "listen"
directive, then after the -HUP signal nginx left an open socket in
the CLOSED state.
*) Bugfix: the mime type may be incorrectly set to default value for
index file with variable in the name; the bug had appeared in 0.3.0.
*) Feature: the "timer_resolution" directive.
*) Feature: the millisecond "$upstream_response_time" log parameter.
*) Bugfix: a temporary file with client request body now is removed
just after the response header was transferred to a client.
*) Bugfix: OpenSSL 0.9.6 compatibility.
*) Bugfix: the SSL certificate and key file paths could not be relative.
*) Bugfix: the "ssl_prefer_server_ciphers" directive did not work in
the ngx_imap_ssl_module.
*) Bugfix: the "ssl_protocols" directive allowed to specify the single
protocol only.
278 lines
6.9 KiB
C
278 lines
6.9 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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/*
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* The time may be updated by signal handler or by several threads.
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* The time update operations are rare and require to hold the ngx_time_lock.
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* The time read operations are frequent, so they are lock-free and get time
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* values and strings from the current slot. Thus thread may get the corrupted
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* values only if it is preempted while copying and then it is not scheduled
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* to run more than NGX_TIME_SLOTS seconds.
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*/
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#define NGX_TIME_SLOTS 64
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static ngx_uint_t slot = NGX_TIME_SLOTS;
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static ngx_atomic_t ngx_time_lock;
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volatile ngx_msec_t ngx_current_msec;
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volatile ngx_time_t *ngx_cached_time;
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volatile ngx_str_t ngx_cached_err_log_time;
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volatile ngx_str_t ngx_cached_http_time;
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volatile ngx_str_t ngx_cached_http_log_time;
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static ngx_time_t cached_time[NGX_TIME_SLOTS];
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static u_char cached_err_log_time[NGX_TIME_SLOTS]
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[sizeof("1970/09/28 12:00:00")];
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static u_char cached_http_time[NGX_TIME_SLOTS]
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[sizeof("Mon, 28 Sep 1970 06:00:00 GMT")];
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static u_char cached_http_log_time[NGX_TIME_SLOTS]
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[sizeof("28/Sep/1970:12:00:00 +0600")];
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static char *week[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
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static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
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void
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ngx_time_init(void)
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{
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ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1;
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ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1;
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ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1;
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ngx_cached_time = &cached_time[0];
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#if !(NGX_WIN32)
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tzset();
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#endif
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ngx_time_update(0, 0);
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}
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void
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ngx_time_update(time_t sec, ngx_uint_t msec)
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{
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u_char *p0, *p1, *p2;
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ngx_tm_t tm, gmt;
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ngx_time_t *tp;
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struct timeval tv;
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if (!ngx_trylock(&ngx_time_lock)) {
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return;
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}
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if (slot == NGX_TIME_SLOTS) {
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slot = 0;
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} else {
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slot++;
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}
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if (sec == 0) {
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ngx_gettimeofday(&tv);
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sec = tv.tv_sec;
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msec = tv.tv_usec / 1000;
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}
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ngx_current_msec = (ngx_msec_t) sec * 1000 + msec;
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tp = &cached_time[slot];
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tp->msec = msec;
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if (tp->sec == sec) {
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ngx_unlock(&ngx_time_lock);
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return;
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}
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tp->sec = sec;
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ngx_gmtime(sec, &gmt);
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p0 = cached_http_time[slot];
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(void) ngx_sprintf(p0, "%s, %02d %s %4d %02d:%02d:%02d GMT",
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week[gmt.ngx_tm_wday], gmt.ngx_tm_mday,
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months[gmt.ngx_tm_mon - 1], gmt.ngx_tm_year,
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gmt.ngx_tm_hour, gmt.ngx_tm_min, gmt.ngx_tm_sec);
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#if (NGX_HAVE_GETTIMEZONE)
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tp->gmtoff = ngx_gettimezone();
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ngx_gmtime(sec + tp->gmtoff * 60, &tm);
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#elif (NGX_HAVE_GMTOFF)
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ngx_localtime(sec, &tm);
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tp->gmtoff = (ngx_int_t) (tm.ngx_tm_gmtoff / 60);
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#else
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ngx_localtime(sec, &tm);
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tp->gmtoff = ngx_timezone(tm.ngx_tm_isdst);
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#endif
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p1 = cached_err_log_time[slot];
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(void) ngx_sprintf(p1, "%4d/%02d/%02d %02d:%02d:%02d",
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tm.ngx_tm_year, tm.ngx_tm_mon,
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tm.ngx_tm_mday, tm.ngx_tm_hour,
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tm.ngx_tm_min, tm.ngx_tm_sec);
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p2 = cached_http_log_time[slot];
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(void) ngx_sprintf(p2, "%02d/%s/%d:%02d:%02d:%02d %c%02d%02d",
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tm.ngx_tm_mday, months[tm.ngx_tm_mon - 1],
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tm.ngx_tm_year, tm.ngx_tm_hour,
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tm.ngx_tm_min, tm.ngx_tm_sec,
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tp->gmtoff < 0 ? '-' : '+',
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ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60));
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ngx_memory_barrier();
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ngx_cached_time = tp;
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ngx_cached_http_time.data = p0;
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ngx_cached_err_log_time.data = p1;
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ngx_cached_http_log_time.data = p2;
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ngx_unlock(&ngx_time_lock);
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}
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u_char *
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ngx_http_time(u_char *buf, time_t t)
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{
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ngx_tm_t tm;
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ngx_gmtime(t, &tm);
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return ngx_sprintf(buf, "%s, %02d %s %4d %02d:%02d:%02d GMT",
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week[tm.ngx_tm_wday],
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tm.ngx_tm_mday,
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months[tm.ngx_tm_mon - 1],
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tm.ngx_tm_year,
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tm.ngx_tm_hour,
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tm.ngx_tm_min,
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tm.ngx_tm_sec);
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}
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u_char *
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ngx_http_cookie_time(u_char *buf, time_t t)
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{
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ngx_tm_t tm;
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ngx_gmtime(t, &tm);
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/*
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* Netscape 3.x does not understand 4-digit years at all and
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* 2-digit years more than "37"
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*/
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return ngx_sprintf(buf,
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(tm.ngx_tm_year > 2037) ?
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"%s, %02d-%s-%d %02d:%02d:%02d GMT":
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"%s, %02d-%s-%02d %02d:%02d:%02d GMT",
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week[tm.ngx_tm_wday],
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tm.ngx_tm_mday,
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months[tm.ngx_tm_mon - 1],
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(tm.ngx_tm_year > 2037) ? tm.ngx_tm_year:
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tm.ngx_tm_year % 100,
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tm.ngx_tm_hour,
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tm.ngx_tm_min,
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tm.ngx_tm_sec);
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}
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void
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ngx_gmtime(time_t t, ngx_tm_t *tp)
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{
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ngx_int_t sec, min, hour, mday, mon, year, wday, yday, days;
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days = t / 86400;
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/* Jaunary 1, 1970 was Thursday */
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wday = (4 + days) % 7;
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t %= 86400;
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hour = t / 3600;
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t %= 3600;
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min = t / 60;
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sec = t % 60;
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/* the algorithm based on Gauss's formula */
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days = days - (31 + 28) + 719527;
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year = days * 400 / (365 * 400 + 100 - 4 + 1);
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yday = days - (365 * year + year / 4 - year / 100 + year / 400);
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mon = (yday + 31) * 12 / 367;
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mday = yday - (mon * 367 / 12 - 31);
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mon += 2;
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if (yday >= 306) {
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/*
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* there is no "yday" in Win32 SYSTEMTIME
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*
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* yday -= 306;
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*/
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year++;
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mon -= 12;
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if (mday == 0) {
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/* Jaunary 31 */
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mon = 1;
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mday = 31;
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} else if (mon == 2) {
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if ((year % 4 == 0) && (year % 100 || (year % 400 == 0))) {
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if (mday > 29) {
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mon = 3;
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mday -= 29;
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}
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} else if (mday > 28) {
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mon = 3;
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mday -= 28;
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}
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}
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/*
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* there is no "yday" in Win32 SYSTEMTIME
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*
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* } else {
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* yday += 31 + 28;
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*
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* if ((year % 4 == 0) && (year % 100 || (year % 400 == 0))) {
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* yday++;
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* }
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*/
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}
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tp->ngx_tm_sec = (ngx_tm_sec_t) sec;
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tp->ngx_tm_min = (ngx_tm_min_t) min;
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tp->ngx_tm_hour = (ngx_tm_hour_t) hour;
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tp->ngx_tm_mday = (ngx_tm_mday_t) mday;
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tp->ngx_tm_mon = (ngx_tm_mon_t) mon;
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tp->ngx_tm_year = (ngx_tm_year_t) year;
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tp->ngx_tm_wday = (ngx_tm_wday_t) wday;
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}
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