1 files changed, 386 insertions, 0 deletions
diff --git a/usr.bin/showmount/showmount.c b/usr.bin/showmount/showmount.c
new file mode 100644
index 0000000..2635250
--- /dev/null
+++ b/usr.bin/showmount/showmount.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (c) 1989, 1993, 1995
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rick Macklem at The University of Guelph.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1989, 1993, 1995\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)showmount.c	8.3 (Berkeley) 3/29/95";
+#endif
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <sys/file.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+
+#include <err.h>
+#include <netdb.h>
+#include <rpc/rpc.h>
+#include <rpc/pmap_clnt.h>
+#include <rpc/pmap_prot.h>
+#include <rpcsvc/mount.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* Constant defs */
+#define	ALL	1
+#define	DIRS	2
+
+#define	DODUMP		0x1
+#define	DOEXPORTS	0x2
+
+struct mountlist {
+	struct mountlist *ml_left;
+	struct mountlist *ml_right;
+	char	ml_host[MNTNAMLEN+1];
+	char	ml_dirp[MNTPATHLEN+1];
+};
+
+struct grouplist {
+	struct grouplist *gr_next;
+	char	gr_name[MNTNAMLEN+1];
+};
+
+struct exportslist {
+	struct exportslist *ex_next;
+	struct grouplist *ex_groups;
+	char	ex_dirp[MNTPATHLEN+1];
+};
+
+static struct mountlist *mntdump;
+static struct exportslist *exportslist;
+static int type = 0;
+
+void print_dump(struct mountlist *);
+static void usage(void);
+int xdr_mntdump(XDR *, struct mountlist **);
+int xdr_exportslist(XDR *, struct exportslist **);
+int tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
+		xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
+
+/*
+ * This command queries the NFS mount daemon for it's mount list and/or
+ * it's exports list and prints them out.
+ * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
+ * and the "Network File System Protocol XXX.."
+ * for detailed information on the protocol.
+ */
+int
+main(int argc, char **argv)
+{
+	register struct exportslist *exp;
+	register struct grouplist *grp;
+	register int rpcs = 0, mntvers = 1;
+	const char *host;
+	int ch, estat;
+
+	while ((ch = getopt(argc, argv, "ade3")) != -1)
+		switch (ch) {
+		case 'a':
+			if (type == 0) {
+				type = ALL;
+				rpcs |= DODUMP;
+			} else
+				usage();
+			break;
+		case 'd':
+			if (type == 0) {
+				type = DIRS;
+				rpcs |= DODUMP;
+			} else
+				usage();
+			break;
+		case 'e':
+			rpcs |= DOEXPORTS;
+			break;
+		case '3':
+			mntvers = 3;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc > 0)
+		host = *argv;
+	else
+		host = "localhost";
+
+	if (rpcs == 0)
+		rpcs = DODUMP;
+
+	if (rpcs & DODUMP)
+		if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers,
+			MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0,
+			(xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) {
+			clnt_perrno(estat);
+			errx(1, "can't do mountdump rpc");
+		}
+	if (rpcs & DOEXPORTS)
+		if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers,
+			MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0,
+			(xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) {
+			clnt_perrno(estat);
+			errx(1, "can't do exports rpc");
+		}
+
+	/* Now just print out the results */
+	if (rpcs & DODUMP) {
+		switch (type) {
+		case ALL:
+			printf("All mount points on %s:\n", host);
+			break;
+		case DIRS:
+			printf("Directories on %s:\n", host);
+			break;
+		default:
+			printf("Hosts on %s:\n", host);
+			break;
+		};
+		print_dump(mntdump);
+	}
+	if (rpcs & DOEXPORTS) {
+		printf("Exports list on %s:\n", host);
+		exp = exportslist;
+		while (exp) {
+			printf("%-34s ", exp->ex_dirp);
+			grp = exp->ex_groups;
+			if (grp == NULL) {
+				printf("Everyone\n");
+			} else {
+				while (grp) {
+					printf("%s ", grp->gr_name);
+					grp = grp->gr_next;
+				}
+				printf("\n");
+			}
+			exp = exp->ex_next;
+		}
+	}
+	exit(0);
+}
+
+/*
+ * tcp_callrpc has the same interface as callrpc, but tries to
+ * use tcp as transport method in order to handle large replies.
+ */
+int 
+tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
+    xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
+{
+	CLIENT *client;
+	struct timeval timeout;
+	int rval;
+
+	if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL &&
+	    (client = clnt_create(host, prognum, versnum, "udp")) == NULL)
+		return ((int) rpc_createerr.cf_stat);
+
+	timeout.tv_sec = 25;
+	timeout.tv_usec = 0;
+	rval = (int) clnt_call(client, procnum, 
+			       inproc, in,
+			       outproc, out,
+			       timeout);
+	clnt_destroy(client);
+ 	return rval;
+}
+
+/*
+ * Xdr routine for retrieving the mount dump list
+ */
+int
+xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
+{
+	register struct mountlist *mp;
+	register struct mountlist *tp;
+	register struct mountlist **otp;
+	int val, val2;
+	int bool;
+	char *strp;
+
+	*mlp = (struct mountlist *)0;
+	if (!xdr_bool(xdrsp, &bool))
+		return (0);
+	while (bool) {
+		mp = (struct mountlist *)malloc(sizeof(struct mountlist));
+		if (mp == NULL)
+			return (0);
+		mp->ml_left = mp->ml_right = (struct mountlist *)0;
+		strp = mp->ml_host;
+		if (!xdr_string(xdrsp, &strp, MNTNAMLEN))
+			return (0);
+		strp = mp->ml_dirp;
+		if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
+			return (0);
+
+		/*
+		 * Build a binary tree on sorted order of either host or dirp.
+		 * Drop any duplications.
+		 */
+		if (*mlp == NULL) {
+			*mlp = mp;
+		} else {
+			tp = *mlp;
+			while (tp) {
+				val = strcmp(mp->ml_host, tp->ml_host);
+				val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
+				switch (type) {
+				case ALL:
+					if (val == 0) {
+						if (val2 == 0) {
+							free((caddr_t)mp);
+							goto next;
+						}
+						val = val2;
+					}
+					break;
+				case DIRS:
+					if (val2 == 0) {
+						free((caddr_t)mp);
+						goto next;
+					}
+					val = val2;
+					break;
+				default:
+					if (val == 0) {
+						free((caddr_t)mp);
+						goto next;
+					}
+					break;
+				};
+				if (val < 0) {
+					otp = &tp->ml_left;
+					tp = tp->ml_left;
+				} else {
+					otp = &tp->ml_right;
+					tp = tp->ml_right;
+				}
+			}
+			*otp = mp;
+		}
+next:
+		if (!xdr_bool(xdrsp, &bool))
+			return (0);
+	}
+	return (1);
+}
+
+/*
+ * Xdr routine to retrieve exports list
+ */
+int
+xdr_exportslist(XDR *xdrsp, struct exportslist **exp)
+{
+	register struct exportslist *ep;
+	register struct grouplist *gp;
+	int bool, grpbool;
+	char *strp;
+
+	*exp = (struct exportslist *)0;
+	if (!xdr_bool(xdrsp, &bool))
+		return (0);
+	while (bool) {
+		ep = (struct exportslist *)malloc(sizeof(struct exportslist));
+		if (ep == NULL)
+			return (0);
+		ep->ex_groups = (struct grouplist *)0;
+		strp = ep->ex_dirp;
+		if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
+			return (0);
+		if (!xdr_bool(xdrsp, &grpbool))
+			return (0);
+		while (grpbool) {
+			gp = (struct grouplist *)malloc(sizeof(struct grouplist));
+			if (gp == NULL)
+				return (0);
+			strp = gp->gr_name;
+			if (!xdr_string(xdrsp, &strp, MNTNAMLEN))
+				return (0);
+			gp->gr_next = ep->ex_groups;
+			ep->ex_groups = gp;
+			if (!xdr_bool(xdrsp, &grpbool))
+				return (0);
+		}
+		ep->ex_next = *exp;
+		*exp = ep;
+		if (!xdr_bool(xdrsp, &bool))
+			return (0);
+	}
+	return (1);
+}
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n");
+	exit(1);
+}
+
+/*
+ * Print the binary tree in inorder so that output is sorted.
+ */
+void
+print_dump(struct mountlist *mp)
+{
+
+	if (mp == NULL)
+		return;
+	if (mp->ml_left)
+		print_dump(mp->ml_left);
+	switch (type) {
+	case ALL:
+		printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
+		break;
+	case DIRS:
+		printf("%s\n", mp->ml_dirp);
+		break;
+	default:
+		printf("%s\n", mp->ml_host);
+		break;
+	};
+	if (mp->ml_right)
+		print_dump(mp->ml_right);
+}