From 2aa84c3f3e9fd8e5732045c48bbaa633250f25ee Mon Sep 17 00:00:00 2001
From: neilbrown <neilbrown>
Date: Mon, 22 Nov 2004 05:36:08 +0000
Subject: [PATCH] more idmapd updates

---
 ChangeLog             |  4 ++++
 utils/idmapd/idmapd.c | 44 ++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 62a22f9..424cd55 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,10 @@
 	* utils/idmapd/idmapd.c: don't allow Default domain and anon-uid
 	or -gid to be specified on command line.
 	* utils/idmapd/idmapd.c: improve error messages
+	* utils/idmapd/idmapd.c: Reopen nfsd files on sighup.  Allows us
+	to start up client side only (even when nfsd module not loaded),
+	and then sighup later after insmodding nfsd module. 
+
 	
 2004-11-22 NeilBrown <neilb@cse.unsw.edu.au>
 
diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
index d2ecbeb..e965563 100644
--- a/utils/idmapd/idmapd.c
+++ b/utils/idmapd/idmapd.c
@@ -109,6 +109,7 @@ TAILQ_HEAD(idmap_clientq, idmap_client);
 
 static void dirscancb(int, short, void *);
 static void clntscancb(int, short, void *);
+static void svrreopen(int, short, void *);
 static int  nfsopen(struct idmap_client *);
 static void nfscb(int, short, void *);
 static void nfsdcb(int, short, void *);
@@ -122,6 +123,7 @@ static void nametoidres(struct idmap_msg *);
 
 static int nfsdopen(char *);
 static int nfsdopenone(struct idmap_client *, short, char *);
+static void nfsdreopen(void);
 
 size_t  strlcat(char *, const char *, size_t);
 size_t  strlcpy(char *, const char *, size_t);
@@ -144,7 +146,7 @@ main(int argc, char **argv)
 {
 	int fd = 0, opt, fg = 0, nfsdret = -1;
 	struct idmap_clientq icq;
-	struct event rootdirev, clntdirev;
+	struct event rootdirev, clntdirev, svrdirev;
 	struct event initialize;
 	struct passwd *pw;
 	struct group *gr;
@@ -279,6 +281,8 @@ main(int argc, char **argv)
 		signal_add(&rootdirev, NULL);
 		signal_set(&clntdirev, SIGUSR2, clntscancb, &icq);
 		signal_add(&clntdirev, NULL);
+		signal_set(&svrdirev, SIGHUP, svrreopen, NULL);
+		signal_add(&svrdirev, NULL);
 
 		/* Fetch current state */
 		/* (Delay till start of event_dispatch to avoid possibly losing
@@ -372,6 +376,12 @@ dirscancb(int fd, short which, void *data)
 	return;
 }
 
+static void
+svrreopen(int fd, short which, void *data)
+{
+	nfsdreopen();
+}
+
 static void
 clntscancb(int fd, short which, void *data)
 {
@@ -568,6 +578,38 @@ out:
 	event_add(&ic->ic_event, NULL);
 }
 
+static void
+nfsdreopen_one(struct idmap_client *ic)
+{
+	int fd;
+
+	if (verbose > 0)
+		warnx("ReOpening %s", ic->ic_path);
+	if ((fd = open(ic->ic_path, O_RDWR, 0)) != -1) {
+		if (ic->ic_fd != -1)
+			close(ic->ic_fd);
+		ic->ic_event.ev_fd = ic->ic_fd = fd;
+		if ((ic->ic_event.ev_flags & EVLIST_INIT) == 0) {
+			event_set(&ic->ic_event, ic->ic_fd, EV_READ, nfsdcb, ic);
+			event_add(&ic->ic_event, NULL);
+		}
+	} else {
+		warnx("nfsdreopen: Opening '%s' failed: errno %d (%s)",
+			ic->ic_path, errno, strerror(errno));
+	}
+}
+
+/*
+ * Note: nfsdreopen assumes nfsdopen has already been called
+ */
+static void
+nfsdreopen()
+{
+	nfsdreopen_one(&nfsd_ic[IC_NAMEID]);
+	nfsdreopen_one(&nfsd_ic[IC_IDNAME]);
+	return;
+}
+
 static int
 nfsdopen(char *path)
 {
-- 
2.39.2