mount: support nfs mount option nordiplus.

 By Octavian Purdila <opurdila AT ixiacom.com>

function                                             old     new   delta
static.options                                       272     281      +9
daemonize                                            130     107     -23
singlemount                                         4674    4579     -95
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 9/-118)           Total: -109 bytes

1 files changed, 32 insertions, 24 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index 9f9249f0a..31f433b3c 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -701,7 +701,8 @@ enum {
 	NFS_MOUNT_TCP = 0x0040,		/* 2 */
 	NFS_MOUNT_VER3 = 0x0080,	/* 3 */
 	NFS_MOUNT_KERBEROS = 0x0100,	/* 3 */
-	NFS_MOUNT_NONLM = 0x0200	/* 3 */
+	NFS_MOUNT_NONLM = 0x0200,	/* 3 */
+	NFS_MOUNT_NORDIRPLUS = 0x4000
 };
 
 
@@ -896,18 +897,16 @@ get_mountport(struct pmap *pm_mnt,
 #if BB_MMU
 static int daemonize(void)
 {
-	int fd;
 	int pid = fork();
 	if (pid < 0) /* error */
 		return -errno;
 	if (pid > 0) /* parent */
 		return 0;
 	/* child */
-	fd = xopen(bb_dev_null, O_RDWR);
-	dup2(fd, 0);
-	dup2(fd, 1);
-	dup2(fd, 2);
-	while (fd > 2) close(fd--);
+	close(0);
+	xopen(bb_dev_null, O_RDWR);
+	xdup2(0, 1);
+	xdup2(0, 2);
 	setsid();
 	openlog(applet_name, LOG_PID, LOG_DAEMON);
 	logmode = LOGMODE_SYSLOG;
@@ -959,23 +958,25 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 	int mountport;
 	int proto;
 #if BB_MMU
-	int bg = 0;
+	smallint bg = 0;
 #else
 	enum { bg = 0 };
 #endif
-	int soft;
-	int intr;
-	int posix;
-	int nocto;
-	int noac;
-	int nolock;
 	int retry;
-	int tcp;
 	int mountprog;
 	int mountvers;
 	int nfsprog;
 	int nfsvers;
 	int retval;
+	/* these all are one-bit really. 4.3.1 likes this combination: */
+	smallint tcp;
+	smallint soft;
+	int intr;
+	int posix;
+	int nocto;
+	int noac;
+	int nordirplus;
+	int nolock;
 
 	find_kernel_nfs_mount_version();
 
@@ -1036,12 +1037,12 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 	 * let the kernel decide.
 	 * timeo is filled in after we know whether it'll be TCP or UDP. */
 	memset(&data, 0, sizeof(data));
-	data.retrans	= 3;
-	data.acregmin	= 3;
-	data.acregmax	= 60;
-	data.acdirmin	= 30;
-	data.acdirmax	= 60;
-	data.namlen	= NAME_MAX;
+	data.retrans  = 3;
+	data.acregmin = 3;
+	data.acregmax = 60;
+	data.acdirmin = 30;
+	data.acdirmax = 60;
+	data.namlen   = NAME_MAX;
 
 	soft = 0;
 	intr = 0;
@@ -1049,6 +1050,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 	nocto = 0;
 	nolock = 0;
 	noac = 0;
+	nordirplus = 0;
 	retry = 10000;		/* 10000 minutes ~ 1 week */
 	tcp = 0;
 
@@ -1183,7 +1185,8 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 				"ac\0"
 				"tcp\0"
 				"udp\0"
-				"lock\0";
+				"lock\0"
+				"rdirplus\0";
 			int val = 1;
 			if (!strncmp(opt, "no", 2)) {
 				val = 0;
@@ -1230,6 +1233,9 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 				else
 					bb_error_msg("warning: option nolock is not supported");
 				break;
+			case 11: //rdirplus
+				nordirplus = !val;
+				break;
 			default:
 				bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
 				goto fail;
@@ -1242,7 +1248,8 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 		| (intr ? NFS_MOUNT_INTR : 0)
 		| (posix ? NFS_MOUNT_POSIX : 0)
 		| (nocto ? NFS_MOUNT_NOCTO : 0)
-		| (noac ? NFS_MOUNT_NOAC : 0);
+		| (noac ? NFS_MOUNT_NOAC : 0)
+		| (nordirplus ? NFS_MOUNT_NORDIRPLUS : 0);
 	if (nfs_mount_version >= 2)
 		data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
 	if (nfs_mount_version >= 3)
@@ -1325,6 +1332,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 		retry_timeout.tv_usec = 0;
 		total_timeout.tv_sec = 20;
 		total_timeout.tv_usec = 0;
+//FIXME: use monotonic()?
 		timeout = time(NULL) + 60 * retry;
 		prevt = 0;
 		t = 30;
@@ -1511,7 +1519,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
 			if (!daemonized) {
 				daemonized = daemonize();
 				if (daemonized <= 0) { /* parent or error */
-	// FIXME: parent doesn't close fsock - ??!
+// FIXME: parent doesn't close fsock - ??!
 					retval = -daemonized;
 					goto ret;
 				}