[STATS] add support for "show info" on the unix socket

It is sometimes required to know some informations such as the
process uptime when consulting statistics. This patch adds the
"show info" command to query those informations on the UNIX
socket.

doc/configuration.txt

@@ -145,14 +145,16 @@ stats socket <path> [{uid | user} <uid>] [{gid | group} <gid>] [mode <mode>]
   Creates a UNIX socket in stream mode at location <path>. Any previously
   existing socket will be backed up then replaced. Connections to this socket
   will get a CSV-formated output of the process statistics in response to the
-  "show stat" command followed by a line feed. On platforms which support it,
-  it is possible to restrict access to this socket by specifying numerical IDs
-  after "uid" and "gid", or valid user and group names after the "user" and
-  "group" keywords. It is also possible to restrict permissions on the socket
-  by passing an octal value after the "mode" keyword (same syntax as chmod).
-  Depending on the platform, the permissions on the socket will be inherited
-  from the directory which hosts it, or from the user the process is started
-  with.
+  "show stat" command followed by a line feed, and more general process
+  information in response to the "show info" command followed by a line feed.
+
+  On platforms which support it, it is possible to restrict access to this
+  socket by specifying numerical IDs after "uid" and "gid", or valid user and
+  group names after the "user" and "group" keywords. It is also possible to
+  restrict permissions on the socket by passing an octal value after the "mode"
+  keyword (same syntax as chmod). Depending on the platform, the permissions on
+  the socket will be inherited from the directory which hosts it, or from the
+  user the process is started with.
 
 stats timeout <timeout, in milliseconds>
   The default timeout on the stats socket is set to 10 seconds. It is possible

include/proto/dumpstats.h

@@ -28,6 +28,8 @@
 #include <types/session.h>
 
 #define STAT_FMT_HTML  0x1
+#define STAT_SHOW_STAT 0x2
+#define STAT_SHOW_INFO 0x4
 
 int stats_parse_global(const char **args, char *err, int errlen);
 int stats_dump_raw(struct session *s, struct uri_auth *uri, int flags);

src/dumpstats.c

@@ -187,6 +187,7 @@ int stats_dump_raw(struct session *s, struct uri_auth *uri, int flags)
 	struct buffer *rep = s->rep;
 	struct proxy *px;
 	struct chunk msg;
+	unsigned int up;
 
 	msg.len = 0;
 	msg.str = trash;
@@ -201,16 +202,50 @@ int stats_dump_raw(struct session *s, struct uri_auth *uri, int flags)
 		/* fall through */
 
 	case DATA_ST_HEAD:
+		if (flags & STAT_SHOW_STAT) {
 			print_csv_header(&msg, sizeof(trash));
 			if (buffer_write_chunk(rep, &msg) != 0)
 				return 0;
+		}
 
 		s->data_state = DATA_ST_INFO;
 		/* fall through */
 
 	case DATA_ST_INFO:
+		up = (now.tv_sec - start_date.tv_sec);
 		memset(&s->data_ctx, 0, sizeof(s->data_ctx));
 
+		if (flags & STAT_SHOW_INFO) {
+			chunk_printf(&msg, sizeof(trash),
+				     "Name: " PRODUCT_NAME "\n"
+				     "Version: " HAPROXY_VERSION "\n"
+				     "Release_date: " HAPROXY_DATE "\n"
+				     "Nbproc: %d\n"
+				     "Process_num: %d\n"
+				     "Pid: %d\n"
+				     "Uptime: %dd %dh%02dm%02ds\n"
+				     "Uptime_sec: %d\n"
+				     "Memmax_MB: %d\n"
+				     "Ulimit-n: %d\n"
+				     "Maxsock: %d\n"
+				     "Maxconn: %d\n"
+				     "CurrConns: %d\n"
+				     "",
+				     global.nbproc,
+				     relative_pid,
+				     pid,
+				     up / 86400, (up % 86400) / 3600, (up % 3600) / 60, (up % 60),
+				     up,
+				     global.rlimit_memmax,
+				     global.rlimit_nofile,
+				     global.maxsock,
+				     global.maxconn,
+				     actconn
+				     );
+			if (buffer_write_chunk(rep, &msg) != 0)
+				return 0;
+		}
+
 		s->data_ctx.stats.px = proxy;
 		s->data_ctx.stats.px_st = DATA_ST_PX_INIT;
 		s->data_state = DATA_ST_LIST;
@@ -218,10 +253,12 @@ int stats_dump_raw(struct session *s, struct uri_auth *uri, int flags)
 
 	case DATA_ST_LIST:
 		/* dump proxies */
+		if (flags & STAT_SHOW_STAT) {
 			while (s->data_ctx.stats.px) {
 				px = s->data_ctx.stats.px;
 				/* skip the disabled proxies and non-networked ones */
-			if (px->state != PR_STSTOPPED && (px->cap & (PR_CAP_FE | PR_CAP_BE)))
+				if (px->state != PR_STSTOPPED &&
+				    (px->cap & (PR_CAP_FE | PR_CAP_BE)))
 					if (stats_dump_proxy(s, px, NULL, 0) == 0)
 						return 0;
 
@@ -229,6 +266,7 @@ int stats_dump_raw(struct session *s, struct uri_auth *uri, int flags)
 				s->data_ctx.stats.px_st = DATA_ST_PX_INIT;
 			}
 			/* here, we just have reached the last proxy */
+		}
 
 		s->data_state = DATA_ST_END;
 		/* fall through */
@@ -402,7 +440,7 @@ int stats_dump_http(struct session *s, struct uri_auth *uri, int flags)
 			     "<hr width=\"100%%\" class=\"hr\">\n"
 			     "<h3>&gt; General process information</h3>\n"
 			     "<table border=0 cols=4><tr><td align=\"left\" nowrap width=\"1%%\">\n"
-			     "<p><b>pid = </b> %d (nbproc = %d)<br>\n"
+			     "<p><b>pid = </b> %d (process #%d, nbproc = %d)<br>\n"
 			     "<b>uptime = </b> %dd %dh%02dm%02ds<br>\n"
 			     "<b>system limits :</b> memmax = %s%s ; ulimit-n = %d<br>\n"
 			     "<b>maxsock = </b> %d<br>\n"
@@ -427,7 +465,8 @@ int stats_dump_http(struct session *s, struct uri_auth *uri, int flags)
 			     "<b>Display option:</b><ul style=\"margin-top: 0.25em;\">"
 			     "",
 			     (uri->flags&ST_HIDEVER)?"":(STATS_VERSION_STRING),
-			     pid, pid, global.nbproc,
+			     pid, pid,
+			     relative_pid, global.nbproc,
 			     up / 86400, (up % 86400) / 3600,
 			     (up % 3600) / 60, (up % 60),
 			     global.rlimit_memmax ? ultoa(global.rlimit_memmax) : "unlimited",

src/proto_uxst.c

@@ -1386,7 +1386,15 @@ void process_uxst_stats(struct task *t, struct timeval *next)
 		if (s->data_state == DATA_ST_INIT) {
 			if ((s->req->l >= 10) && (memcmp(s->req->data, "show stat\n", 10) == 0)) {
 				/* send the stats, and changes the data_state */
-				if (stats_dump_raw(s, NULL, 0) != 0) {
+				if (stats_dump_raw(s, NULL, STAT_SHOW_STAT) != 0) {
+					s->srv_state = SV_STCLOSE;
+					fsm_resync |= 1;
+					continue;
+				}
+			}
+			if ((s->req->l >= 10) && (memcmp(s->req->data, "show info\n", 10) == 0)) {
+				/* send the stats, and changes the data_state */
+				if (stats_dump_raw(s, NULL, STAT_SHOW_INFO) != 0) {
 					s->srv_state = SV_STCLOSE;
 					fsm_resync |= 1;
 					continue;