From: Fredrik Tolf <fredrik@dolda2000.com>
Date: Wed, 8 Aug 2012 17:19:24 +0000 (+0200)
Subject: Added the `httimed' program.
X-Git-Tag: 0.11~3
X-Git-Url: http://www.dolda2000.com/gitweb/?p=ashd.git;a=commitdiff_plain;h=c1fc98261011ee0758a49da491cf4bd4e47eb8eb

Added the `httimed' program.
---

diff --git a/doc/Makefile.am b/doc/Makefile.am
index e018ed8..dc88692 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,6 +1,6 @@
 dist_man1_MANS =	callcgi.1 dirplex.1 htparser.1 patplex.1 sendfile.1 \
 			userplex.1 htls.1 callscgi.1 accesslog.1 htextauth.1 \
-			callfcgi.1 multifscgi.1 errlogger.1
+			callfcgi.1 multifscgi.1 errlogger.1 httimed.1
 
 dist_man7_MANS = ashd.7
 
diff --git a/doc/httimed.doc b/doc/httimed.doc
new file mode 100644
index 0000000..d34f474
--- /dev/null
+++ b/doc/httimed.doc
@@ -0,0 +1,49 @@
+httimed(1)
+==========
+
+NAME
+----
+httimed - Ashd handler expiration pipe
+
+SYNOPSIS
+--------
+*httimed* [*-h*] [*-t* 'TIMEOUT'] 'CHILD' ['ARGS'...]
+
+DESCRIPTION
+-----------
+
+The *httimed* handler starts a single child handler which it passes
+all request it receives unmodified, and in addition keeps track of
+time and simply exits if no requests are received in a certain
+interval, which might be useful for handlers which are only rarely
+used and waste unproportionally much system resources if kept beyond
+their usefulness.
+
+*httimed* is a persistent handler, as defined in *ashd*(7), and the
+specified child handler must also be a persistent handler.
+
+By default, *httimed* exits if it receives no requests in five
+minutes, but the time interval can be specified using the *-t* option.
+
+If the child handler exits, *httimed* exits as well.
+
+OPTIONS
+-------
+
+*-h*::
+
+	Print a brief help message to standard output and exit.
+
+*-t* 'TIMEOUT'::
+
+	Exit if no requests are received after 'TIMEOUT' seconds since
+	the last one. If *-t* is not specified, 'TIMEOUT' is five
+	minutes by default.
+
+AUTHOR
+------
+Fredrik Tolf <fredrik@dolda2000.com>
+
+SEE ALSO
+--------
+*ashd*(7)
diff --git a/src/.gitignore b/src/.gitignore
index 4a9153f..582f3e7 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -11,3 +11,4 @@
 /multifscgi
 /errlogger
 /psendfile
+/httimed
diff --git a/src/Makefile.am b/src/Makefile.am
index 394e353..8a08744 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,7 +2,7 @@ SUBDIRS = dirplex
 
 bin_PROGRAMS =	htparser sendfile callcgi patplex userplex htls \
 		callscgi accesslog htextauth callfcgi multifscgi \
-		errlogger
+		errlogger httimed
 
 noinst_PROGRAMS=psendfile
 
diff --git a/src/httimed.c b/src/httimed.c
new file mode 100644
index 0000000..2c939c5
--- /dev/null
+++ b/src/httimed.c
@@ -0,0 +1,106 @@
+/*
+    ashd - A Sane HTTP Daemon
+    Copyright (C) 2008  Fredrik Tolf <fredrik@dolda2000.com>
+
+    This program 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 3 of the License, or
+    (at your option) any later version.
+
+    This program 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.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/poll.h>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <utils.h>
+#include <log.h>
+#include <req.h>
+#include <proc.h>
+
+static void usage(FILE *out)
+{
+    fprintf(out, "usage: httimed [-h] [-t TIMEOUT] CHILD [ARGS...]\n");
+}
+
+int main(int argc, char **argv)
+{
+    int c, t, ret;
+    int ch, fd;
+    struct hthead *req;
+    struct pollfd pfd[2];
+    time_t lreq, now;
+    
+    t = 300;
+    while((c = getopt(argc, argv, "+ht:")) >= 0) {
+	switch(c) {
+	case 'h':
+	    usage(stdout);
+	    exit(0);
+	case 't':
+	    t = atoi(optarg);
+	    if(t < 1) {
+		fprintf(stderr, "httimed: timeout must be positive\n");
+		exit(1);
+	    }
+	    break;
+	}
+    }
+    if(argc - optind < 1) {
+	usage(stderr);
+	exit(1);
+    }
+    if((ch = stdmkchild(argv + optind, NULL, NULL)) < 0) {
+	flog(LOG_ERR, "httimed: could not fork child: %s", strerror(errno));
+	exit(1);
+    }
+    lreq = time(NULL);
+    while(1) {
+	memset(pfd, 0, sizeof(pfd));
+	pfd[0].fd = 0;
+	pfd[0].events = POLLIN;
+	pfd[1].fd = ch;
+	pfd[1].events = POLLHUP;
+	if((ret = poll(pfd, 2, (t + 1 - (time(NULL) - lreq)) * 1000)) < 0) {
+	    if(errno != EINTR) {
+		flog(LOG_ERR, "httimed: error in poll: %s", strerror(errno));
+		exit(1);
+	    }
+	}
+	now = time(NULL);
+	if(pfd[0].revents) {
+	    if((fd = recvreq(0, &req)) < 0) {
+		if(errno == 0)
+		    break;
+		flog(LOG_ERR, "httimed: error in recvreq: %s", strerror(errno));
+		exit(1);
+	    }
+	    if(sendreq(ch, req, fd)) {
+		flog(LOG_ERR, "httimed: could not pass request to child: %s", strerror(errno));
+		exit(1);
+	    }
+	    freehthead(req);
+	    close(fd);
+	}
+	if(pfd[1].revents & POLLHUP)
+	    break;
+	if(now - lreq > t)
+	    break;
+	lreq = now;
+    }
+    return(0);
+}