Move export_d_read() to support/export/export.c

This places it in the same place as the similar export_read(),
and allows it to be called from other programs.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

2 files changed, 66 insertions, 0 deletions

diff --git a/support/export/export.c b/support/export/export.c
index e1bebce..0b8a858 100644
--- a/support/export/export.c
+++ b/support/export/export.c
@@ -15,6 +15,8 @@
 #include <sys/param.h>
 #include <netinet/in.h>
 #include <stdlib.h>
+#include <dirent.h>
+#include <errno.h>
 #include "xmalloc.h"
 #include "nfslib.h"
 #include "exportfs.h"
@@ -96,6 +98,69 @@ export_read(char *fname)
 }
 
 /**
+ * export_d_read - read entries from /etc/exports.
+ * @fname: name of directory to read from
+ *
+ * Returns number of read entries.
+ * Based on mnt_table_parse_dir() in
+ *  util-linux-ng/shlibs/mount/src/tab_parse.c
+ */
+int
+export_d_read(const char *dname)
+{
+	int n = 0, i;
+	struct dirent **namelist = NULL;
+	int volumes = 0;
+
+
+	n = scandir(dname, &namelist, NULL, versionsort);
+	if (n < 0) {
+		if (errno == ENOENT)
+			/* Silently return */
+			return volumes;
+		xlog(L_NOTICE, "scandir %s: %s", dname, strerror(errno));
+	} else if (n == 0)
+		return volumes;
+
+	for (i = 0; i < n; i++) {
+		struct dirent *d = namelist[i];
+		size_t namesz;
+		char fname[PATH_MAX + 1];
+		int fname_len;
+
+
+		if (d->d_type != DT_UNKNOWN
+		    && d->d_type != DT_REG
+		    && d->d_type != DT_LNK)
+			continue;
+		if (*d->d_name == '.')
+			continue;
+
+#define _EXT_EXPORT_SIZ   (sizeof(_EXT_EXPORT) - 1)
+		namesz = strlen(d->d_name);
+		if (!namesz
+		    || namesz < _EXT_EXPORT_SIZ + 1
+		    || strcmp(d->d_name + (namesz - _EXT_EXPORT_SIZ),
+			      _EXT_EXPORT))
+			continue;
+
+		fname_len = snprintf(fname, PATH_MAX +1, "%s/%s", dname, d->d_name);
+		if (fname_len > PATH_MAX) {
+			xlog(L_WARNING, "Too long file name: %s in %s", d->d_name, dname);
+			continue;
+		}
+
+		volumes += export_read(fname);
+	}
+
+	for (i = 0; i < n; i++)
+		free(namelist[i]);
+	free(namelist);
+
+	return volumes;
+}
+
+/**
  * export_create - create an in-core nfs_export record from an export entry
  * @xep: export entry to lookup
  * @canonical: if set, e_hostname is known to be canonical DNS name
diff --git a/support/include/exportfs.h b/support/include/exportfs.h
index 4cac203..f033329 100644
--- a/support/include/exportfs.h
+++ b/support/include/exportfs.h
@@ -135,6 +135,7 @@ int 				client_member(const char *client,
 						const char *name);
 
 int				export_read(char *fname);
+int				export_d_read(const char *dname);
 void				export_reset(nfs_export *);
 nfs_export *			export_lookup(char *hname, char *path, int caconical);
 nfs_export *			export_find(const struct addrinfo *ai,