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changed the remote log socket to be non-blocking in sys::xxxlog()

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This commit is contained in:
hyung-hwan 2019-01-23 03:32:24 +00:00
parent f33518b964
commit b2d3050d8b
1 changed files with 94 additions and 42 deletions
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136
qse/lib/awk/mod-sys.c
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@ -900,6 +900,58 @@ skip_system:
return 0;
}
static void open_remote_log_socket (qse_awk_rtx_t* rtx, mod_ctx_t* mctx)
{
#if defined(_WIN32)
/* TODO: implement this */
#else
int sck, flags;
int domain = qse_skadfamily(&mctx->log.skad);
int type = SOCK_DGRAM;
QSE_ASSERT (mctx->log.sck <= -1);
#if defined(SOCK_NONBLOCK) && defined(SOCK_CLOEXEC)
type |= SOCK_NONBLOCK;
type |= SOCK_CLOEXEC;
open_socket:
#endif
sck = socket(domain, type, 0);
if (sck == -1)
{
#if defined(SOCK_NONBLOCK) && defined(SOCK_CLOEXEC)
if (errno == EINVAL && (type & (SOCK_NONBLOCK | SOCK_CLOEXEC)))
{
type &= ~(SOCK_NONBLOCK | SOCK_CLOEXEC);
goto open_socket;
}
#endif
return;
}
else
{
#if defined(SOCK_NONBLOCK) && defined(SOCK_CLOEXEC)
if (type & (SOCK_NONBLOCK | SOCK_CLOEXEC)) goto done;
#endif
}
flags = fcntl(sck, F_GETFD, 0);
if (flags == -1) return;
#if defined(FD_CLOEXEC)
flags |= FD_CLOEXEC;
#endif
#if defined(O_NONBLOCK)
flags |= O_NONBLOCK;
#endif
if (fcntl(sck, F_SETFD, flags) == -1) return;
done:
mctx->log.sck = sck;
#endif
}
static int fnc_openlog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
{
int rx = -1;
@ -964,7 +1016,11 @@ static int fnc_openlog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
#endif
if (mctx->log.sck >= 0)
{
#if defined(_WIN32)
/* TODO: impelement this */
#else
close (mctx->log.sck);
#endif
mctx->log.sck = -1;
}
@ -981,8 +1037,7 @@ static int fnc_openlog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
else if (mctx->log.type == SYSLOG_REMOTE)
{
qse_nwadtoskad (&nwad, &mctx->log.skad);
/* TODO: open socket? */
if ((opt & LOG_NDELAY) && mctx->log.sck <= -1) open_remote_log_socket (rtx, mctx);
}
rx = 0;
@ -1003,30 +1058,37 @@ static int fnc_closelog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
qse_awk_val_t* retv;
mod_ctx_t* mctx = fi->mod->ctx;
if (mctx->log.type == SYSLOG_LOCAL)
switch (mctx->log.type)
{
#if defined(ENABLE_SYSLOG)
closelog ();
// closelog() might be called without openlog(). so there is no
// check if syslog_opened is true.
// it is just used as an indicator to decide wheter closelog()
// upon module finalization(fini).
mctx->log.syslog_opened = 0;
#endif
}
else if (mctx->log.type == SYSLOG_REMOTE)
{
if (mctx->log.sck >= 0)
{
close (mctx->log.sck);
mctx->log.sck = -1;
}
case SYSLOG_LOCAL:
#if defined(ENABLE_SYSLOG)
closelog ();
/* closelog() might be called without openlog(). so there is no
* check if syslog_opened is true.
* it is just used as an indicator to decide wheter closelog()
* should be called upon module finalization(fini). */
mctx->log.syslog_opened = 0;
#endif
break;
if (mctx->log.dmsgbuf)
{
qse_mbs_close (mctx->log.dmsgbuf);
mctx->log.dmsgbuf = QSE_NULL;
}
case SYSLOG_REMOTE:
if (mctx->log.sck >= 0)
{
#if defined(_WIN32)
/* TODO: impelement this */
#else
close (mctx->log.sck);
#endif
mctx->log.sck = -1;
}
if (mctx->log.dmsgbuf)
{
qse_mbs_close (mctx->log.dmsgbuf);
mctx->log.dmsgbuf = QSE_NULL;
}
break;
}
if (mctx->log.ident)
@ -1036,7 +1098,7 @@ static int fnc_closelog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
}
/* back to the local syslog in case writelog() is called
* without another openlog() */
* without another openlog() after this closelog() */
mctx->log.type = SYSLOG_LOCAL;
rx = 0;
@ -1048,6 +1110,7 @@ static int fnc_closelog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
return 0;
}
static int fnc_writelog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
{
int rx = -1;
@ -1104,25 +1167,10 @@ static int fnc_writelog (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
QSE_MT("Dec"),
};
if (mctx->log.sck <= -1)
{
#if defined(SOCK_CLOEXECX)
mctx->log.sck = socket (qse_skadfamily(&mctx->log.skad), SOCK_DGRAM | SOCK_CLOEXEC, 0);
#else
mctx->log.sck = socket (qse_skadfamily(&mctx->log.skad), SOCK_DGRAM, 0);
#if defined(FD_CLOEXEC)
if (mctx->log.sck >= 0)
{
int flag = fcntl (mctx->log.sck, F_GETFD);
if (flag >= 0) fcntl (mctx->log.sck, F_SETFD, flag | FD_CLOEXEC);
}
#endif
#endif
}
if (mctx->log.sck <= -1) open_remote_log_socket (rtx, mctx);
if (mctx->log.sck >= 0)
{
///////////////////////////
if (!mctx->log.dmsgbuf) mctx->log.dmsgbuf = qse_mbs_open(qse_awk_rtx_getmmgr(rtx), 0, 0);
if (!mctx->log.dmsgbuf) goto done;
@ -1367,7 +1415,11 @@ static void fini (qse_awk_mod_t* mod, qse_awk_rtx_t* rtx)
#if defined(ENABLE_SYSLOG)
if (mctx->log.syslog_opened)
{
/* closelog() only if openlog() has been called explicitly */
/* closelog() only if openlog() has been called explicitly.
* if you call writelog() functions without openlog() and
* end yoru program without closelog(), the program may leak
* some resources created by the writelog() function. (e.g.
* socket to /dev/log) */
closelog ();
mctx->log.syslog_opened = 0;
}