Initial revision

1 files changed, 133 insertions, 0 deletions

diff --git a/support/export/xtab.c b/support/export/xtab.c
new file mode 100644
index 0000000..4289d7c
--- /dev/null
+++ b/support/export/xtab.c
@@ -0,0 +1,133 @@
+/*
+ * support/export/xtab.c
+ *
+ * Interface to the xtab file.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include "config.h"
+
+#include <sys/fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include "xmalloc.h"
+#include "nfslib.h"
+#include "exportfs.h"
+#include "xio.h"
+#include "xlog.h"
+
+static int
+xtab_read(char *xtab, int is_export)
+{
+	struct exportent	*xp;
+	nfs_export		*exp;
+	int			lockid;
+
+	if ((lockid = xflock(xtab, "r")) < 0)
+		return 0;
+	setexportent(xtab, "r");
+	while ((xp = getexportent()) != NULL) {
+		if (!(exp = export_lookup(xp->e_hostname, xp->e_path)) &&
+		    !(exp = export_create(xp))) {
+			continue;
+		}
+		if (is_export) {
+			exp->m_xtabent = 1;
+			exp->m_mayexport = 1;
+		} else
+			exp->m_exported = 1;
+	}
+	endexportent();
+	xfunlock(lockid);
+
+	return 0;
+}
+
+int
+xtab_mount_read(void)
+{
+	int fd;
+	if ((fd=open(_PATH_PROC_EXPORTS, O_RDONLY))>=0) {
+		close(fd);
+		return xtab_read(_PATH_PROC_EXPORTS, 0);
+	} else
+		return xtab_read(_PATH_XTAB, 0);
+}
+
+int
+xtab_export_read(void)
+{
+	return xtab_read(_PATH_ETAB, 1);
+}
+
+static int
+xtab_write(char *xtab, char *xtabtmp, int is_export)
+{
+	struct exportent	xe;
+	nfs_export		*exp;
+	int			lockid, i;
+
+	if ((lockid = xflock(xtab, "w")) < 0) {
+		xlog(L_ERROR, "can't lock %s for writing", xtab);
+		return 0;
+	}
+	setexportent(xtabtmp, "w");
+
+	for (i = 0; i < MCL_MAXTYPES; i++) {
+		for (exp = exportlist[i]; exp; exp = exp->m_next) {
+			if (is_export && !exp->m_xtabent)
+				continue;
+			if (!is_export && ! exp->m_exported)
+				continue;
+
+			/* write out the export entry using the FQDN */
+			xe = exp->m_export;
+			strncpy(xe.e_hostname,
+				exp->m_client->m_hostname,
+				sizeof (xe.e_hostname) - 1);
+			xe.e_hostname[sizeof (xe.e_hostname) - 1] = '\0';
+			putexportent(&xe);
+		}
+	}
+	endexportent();
+
+	rename(xtabtmp, xtab);
+
+	xfunlock(lockid);
+
+	return 1;
+}
+
+int
+xtab_export_write()
+{
+	return xtab_write(_PATH_ETAB, _PATH_ETABTMP, 1);
+}
+
+int
+xtab_mount_write()
+{
+	return xtab_write(_PATH_XTAB, _PATH_XTABTMP, 0);
+}
+
+void
+xtab_append(nfs_export *exp)
+{
+	struct exportent xe;
+	int		lockid;
+
+	if ((lockid = xflock(_PATH_XTAB, "w")) < 0)
+		return;
+	setexportent(_PATH_XTAB, "a");
+	xe = exp->m_export;
+	strncpy(xe.e_hostname, exp->m_client->m_hostname,
+	       sizeof (xe.e_hostname) - 1);
+	xe.e_hostname[sizeof (xe.e_hostname) - 1] = '\0';
+	putexportent(&xe);
+	endexportent();
+	xfunlock(lockid);
+	exp->m_xtabent = 1;
+}
+