Initial revision

1 files changed, 391 insertions, 0 deletions

diff --git a/utils/exportfs/exportfs.c b/utils/exportfs/exportfs.c
new file mode 100644
index 0000000..44761f8
--- /dev/null
+++ b/utils/exportfs/exportfs.c
@@ -0,0 +1,391 @@
+/*
+ * utils/exportfs/exportfs.c
+ *
+ * Export file systems to knfsd
+ *
+ * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
+ *
+ * Extensive changes, 1999, Neil Brown <neilb@cse.unsw.edu.au>
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <netdb.h>
+#include <errno.h>
+#include "xmalloc.h"
+#include "misc.h"
+#include "nfslib.h"
+#include "exportfs.h"
+#include "xmalloc.h"
+#include "xlog.h"
+
+static void	export_all(int verbose);
+static void	unexport_all(int verbose);
+static void	exportfs(char *arg, char *options, int verbose);
+static void	unexportfs(char *arg, int verbose);
+static void	exports_update(int verbose);
+static void	dump(int verbose);
+static void	error(nfs_export *exp, int err);
+static void	usage(void);
+
+
+int
+main(int argc, char **argv)
+{
+	char	*options = NULL;
+	int	f_export = 1;
+	int	f_all = 0;
+	int	f_verbose = 0;
+	int	f_reexport = 0;
+	int	f_ignore = 0;
+	int	i, c;
+
+	xlog_open("exportfs");
+
+	while ((c = getopt(argc, argv, "aio:ruv")) != EOF) {
+		switch(c) {
+		case 'a':
+			f_all = 1;
+			break;
+		case 'i':
+			f_ignore = 1;
+			break;
+		case 'o':
+			options = optarg;
+			break;
+		case 'r':
+			f_reexport = 1;
+			f_all = 1;
+			break;
+		case 'u':
+			f_export = 0;
+			break;
+		case 'v':
+			f_verbose = 1;
+			break;
+		default:
+			usage();
+			break;
+		}
+	}
+
+	if (optind != argc && f_all) {
+		fprintf(stderr,"exportfs: extra arguments are not permitted with -a or -r.\n");
+		return 1;
+	}
+	if (f_ignore && (f_all || ! f_export)) {
+		fprintf(stderr,"exportfs: -i not meaningful with -a, -r or -u.\n");
+		return 1;
+	}
+	if (f_reexport && ! f_export) {
+		fprintf(stderr, "exportfs: -r and -u are incompatible.\n");
+		return 1;
+	}
+	if (optind == argc && ! f_all) {
+		xtab_export_read();
+		dump(f_verbose);
+		return 0;
+	}
+
+	if (f_export && ! f_ignore)
+		export_read(_PATH_EXPORTS);
+	if (f_export) {
+		if (f_all)
+			export_all(f_verbose);
+		else
+			for (i = optind; i < argc ; i++)
+				exportfs(argv[i], options, f_verbose);
+	}
+	/* note: xtab_*_read does not update entries if they already exist,
+	 * so this will not lose new options
+	 */
+	if (!f_reexport)
+		xtab_export_read();
+	if (!f_export) {
+		if (f_all)
+			unexport_all(f_verbose);
+		else
+			for (i = optind ; i < argc ; i++)
+				unexportfs(argv[i], f_verbose);
+	}
+	rmtab_read();
+	xtab_mount_read();
+	exports_update(f_verbose);
+	xtab_export_write();
+	xtab_mount_write();
+
+	return 0;
+}
+
+/* we synchronise intention with reality.
+ * entries with m_mayexport get exported
+ * entries with m_exported but not m_mayexport get unexported
+ * looking at m_client->m_type == MCL_FQDN only
+ */
+static void
+exports_update(int verbose)
+{
+	nfs_export 	*exp;
+
+	for (exp = exportlist[MCL_FQDN]; exp; exp=exp->m_next) {
+		if (exp->m_mayexport && (!exp->m_exported || exp->m_changed)) {
+			if (verbose)
+				printf("%sexporting %s:%s to kernel\n",
+				       exp->m_exported ?"re":"",
+				       exp->m_client->m_hostname,
+				       exp->m_export.e_path);
+			if (!export_export(exp))
+				error(exp, errno);
+		}
+		if (exp->m_exported && ! exp->m_mayexport) {
+			if (verbose)
+				printf("unexporting %s:%s from kernel\n",
+				       exp->m_client->m_hostname,
+				       exp->m_export.e_path);
+			if (!export_unexport(exp))
+				error(exp, errno);
+		}
+	}
+}
+			
+/*
+ * export_all finds all entries and
+ *    marks them xtabent and mayexport so that they get exported
+ */
+static void
+export_all(int verbose)
+{
+	nfs_export	*exp;
+	int		i;
+
+	for (i = 0; i < MCL_MAXTYPES; i++) {
+		for (exp = exportlist[i]; exp; exp = exp->m_next) {
+			if (verbose)
+				printf("exporting %s:%s\n",
+				       exp->m_client->m_hostname, 
+				       exp->m_export.e_path);
+			exp->m_xtabent = 1;
+			exp->m_mayexport = 1;
+			exp->m_changed = 1;
+		}
+	}
+}
+/*
+ * unexport_all finds all entries that are mayexport, and
+ *    marks them not xtabent and not mayexport
+ */
+static void
+unexport_all(int verbose)
+{
+	nfs_export	*exp;
+	int		i;
+
+	for (i = 0; i < MCL_MAXTYPES; i++) {
+		for (exp = exportlist[i]; exp; exp = exp->m_next)
+			if (exp->m_mayexport) {
+				if (verbose) {
+					if (exp->m_exported) {
+						printf("unexporting %s:%s from kernel\n",
+						       exp->m_client->m_hostname,
+						       exp->m_export.e_path);
+					}
+					else {
+						printf("unexporting %s:%s\n",
+						        exp->m_client->m_hostname, 
+							exp->m_export.e_path);
+					}
+				}
+				if (exp->m_exported && !export_unexport(exp))
+					error(exp, errno);
+				exp->m_xtabent = 0;
+				exp->m_mayexport = 0;
+			}
+	}
+}
+
+
+static void
+exportfs(char *arg, char *options, int verbose)
+{
+	struct exportent *eep;
+	nfs_export	*exp;
+	struct hostent	*hp = NULL;
+	char		*path;
+	char		*hname = arg;
+	int		htype;
+
+	if ((path = strchr(arg, ':')) != NULL)
+		*path++ = '\0';
+
+	if (!path || *path != '/') {
+		fprintf(stderr, "Invalid exporting option: %s\n", arg);
+		return;
+	}
+
+	if ((htype = client_gettype(hname)) == MCL_FQDN &&
+	    (hp = gethostbyname(hname)) != NULL) {
+		hp = hostent_dup (hp);
+		exp = export_find(hp, path);
+	} else {
+		exp = export_lookup(hname, path);
+	}
+
+	if (!exp) {
+		if (!(eep = mkexportent(hname, path, options)) ||
+		    !(exp = export_create(eep))) {
+			if (hp) free (hp);
+			return;
+		}
+	} else if (!updateexportent(&exp->m_export, options)) {
+		if (hp) free (hp);
+		return;
+	}
+
+	if (verbose)
+		printf("exporting %s:%s\n", exp->m_client->m_hostname, 
+			exp->m_export.e_path);
+	exp->m_xtabent = 1;
+	exp->m_mayexport = 1;
+	exp->m_changed = 1;
+	if (hp) free (hp);
+}
+
+static void
+unexportfs(char *arg, int verbose)
+{
+	nfs_export	*exp;
+	struct hostent	*hp = NULL;
+	char		*path;
+	char		*hname = arg;
+	int		htype;
+
+	if ((path = strchr(arg, ':')) != NULL)
+		*path++ = '\0';
+
+	if (!path || *path != '/') {
+		fprintf(stderr, "Invalid unexporting option: %s\n",
+			arg);
+		return;
+	}
+
+	if ((htype = client_gettype(hname)) == MCL_FQDN) {
+		if ((hp = gethostbyname(hname)) != 0) {
+			hp = hostent_dup (hp);
+			hname = (char *) hp->h_name;
+		}
+	}
+
+	for (exp = exportlist[htype]; exp; exp = exp->m_next) {
+		if (path && strcmp(path, exp->m_export.e_path))
+			continue;
+		if (htype != exp->m_client->m_type
+		    || (htype == MCL_FQDN
+		        && !matchhostname(exp->m_export.e_hostname,
+					  hname)))
+			continue;
+		if (verbose) {
+			if (exp->m_exported) {
+				printf("unexporting %s:%s from kernel\n",
+				       exp->m_client->m_hostname,
+				       exp->m_export.e_path);
+			}
+			else {
+				printf("unexporting %s:%s\n",
+					exp->m_client->m_hostname, 
+					exp->m_export.e_path);
+			}
+		}
+		if (exp->m_exported && !export_unexport(exp))
+			error(exp, errno);
+		exp->m_xtabent = 0;
+		exp->m_mayexport = 0;
+	}
+
+	if (hp) free (hp);
+}
+
+static char
+dumpopt(char c, char *fmt, ...)
+{
+	va_list	ap;
+
+	va_start(ap, fmt);
+	printf("%c", c);
+	vprintf(fmt, ap);
+	va_end(ap);
+	return ',';
+}
+
+static void
+dump(int verbose)
+{
+	nfs_export	*exp;
+	struct exportent *ep;
+	int		htype;
+	char		*hname, c;
+
+	for (htype = 0; htype < MCL_MAXTYPES; htype++) {
+		for (exp = exportlist[htype]; exp; exp = exp->m_next) {
+			ep = &exp->m_export;
+			if (!exp->m_xtabent)
+			    continue; /* neilb */
+			if (htype == MCL_ANONYMOUS)
+				hname = "<world>";
+			else
+				hname = ep->e_hostname;
+			if (strlen(ep->e_path) > 14)
+				printf("%-14s\n\t\t%s", ep->e_path, hname);
+			else
+				printf("%-14s\t%s", ep->e_path, hname);
+			if (!verbose) {
+				printf("\n");
+				continue;
+			}
+			c = '(';
+			if (ep->e_flags & NFSEXP_READONLY)
+				c = dumpopt(c, "ro");
+			else
+				c = dumpopt(c, "rw");
+			if (ep->e_flags & NFSEXP_ASYNC)
+				c = dumpopt(c, "async");
+			if (ep->e_flags & NFSEXP_GATHERED_WRITES)
+				c = dumpopt(c, "wdelay");
+			if (ep->e_flags & NFSEXP_INSECURE_PORT)
+				c = dumpopt(c, "insecure");
+			if (ep->e_flags & NFSEXP_ROOTSQUASH)
+				c = dumpopt(c, "root_squash");
+			else
+				c = dumpopt(c, "no_root_squash");
+			if (ep->e_flags & NFSEXP_ALLSQUASH)
+				c = dumpopt(c, "all_squash");
+			if (ep->e_maptype == CLE_MAP_UGIDD)
+				c = dumpopt(c, "mapping=ugidd");
+			else if (ep->e_maptype == CLE_MAP_FILE)
+				c = dumpopt(c, "mapping=file");
+			if (ep->e_anonuid != -2)
+				c = dumpopt(c, "anonuid=%d", ep->e_anonuid);
+			if (ep->e_anongid != -2)
+				c = dumpopt(c, "anongid=%d", ep->e_anongid);
+
+			printf("%c\n", (c != '(')? ')' : ' ');
+		}
+	}
+}
+
+static void
+error(nfs_export *exp, int err)
+{
+	fprintf(stderr, "%s:%s: %s\n", exp->m_client->m_hostname, 
+		exp->m_export.e_path, strerror(err));
+}
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: exportfs [-aruv] [host:/path]\n");
+	exit(1);
+}