- nfs_pmap->pm_prog = nfs_nfs_program(options);
- nfs_pmap->pm_vers = nfs_nfs_version(options);
- nfs_pmap->pm_prot = nfs_nfs_protocol(options);
- nfs_pmap->pm_port = nfs_nfs_port(options);
-
- mnt_pmap->pm_prog = nfs_mount_program(options);
- mnt_pmap->pm_vers = nfs_mount_version(options);
- mnt_pmap->pm_prot = nfs_mount_protocol(options);
- mnt_pmap->pm_port = nfs_mount_port(options);
+ if (!nfs_nfs_program(options, &nfs_pmap->pm_prog))
+ return 0;
+ if (!nfs_nfs_version(options, &nfs_pmap->pm_vers))
+ return 0;
+ if (!nfs_nfs_protocol(options, &nfs_pmap->pm_prot))
+ return 0;
+ if (!nfs_nfs_port(options, &nfs_pmap->pm_port))
+ return 0;
+
+ if (!nfs_mount_program(options, &mnt_pmap->pm_prog))
+ return 0;
+ if (!nfs_mount_version(options, &mnt_pmap->pm_vers))
+ return 0;
+ if (!nfs_mount_protocol(options, &mnt_pmap->pm_prot))
+ return 0;
+ if (!nfs_mount_port(options, &mnt_pmap->pm_port))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Discover mount server's hostname/address by examining mount options
+ *
+ * Returns a pointer to a string that the caller must free, on
+ * success; otherwise NULL is returned.
+ */
+static char *nfs_umount_hostname(struct mount_options *options,
+ char *hostname)
+{
+ char *option;
+
+ option = po_get(options, "mountaddr");
+ if (option)
+ goto out;
+ option = po_get(options, "mounthost");
+ if (option)
+ goto out;
+ option = po_get(options, "addr");
+ if (option)
+ goto out;
+
+ return hostname;
+
+out:
+ free(hostname);
+ return strdup(option);
+}
+
+
+/*
+ * Returns EX_SUCCESS if mount options and device name have been
+ * parsed successfully; otherwise EX_FAIL.
+ */
+int nfs_umount_do_umnt(struct mount_options *options,
+ char **hostname, char **dirname)
+{
+ union nfs_sockaddr address;
+ struct sockaddr *sap = &address.sa;
+ socklen_t salen = sizeof(address);
+ struct pmap nfs_pmap, mnt_pmap;
+ sa_family_t family;
+
+ if (!nfs_options2pmap(options, &nfs_pmap, &mnt_pmap))
+ return EX_FAIL;
+
+ /* Skip UMNT call for vers=4 mounts */
+ if (nfs_pmap.pm_vers == 4)
+ return EX_SUCCESS;
+
+ *hostname = nfs_umount_hostname(options, *hostname);
+ if (!*hostname) {
+ nfs_error(_("%s: out of memory"), progname);
+ return EX_FAIL;
+ }
+
+ if (!nfs_mount_proto_family(options, &family))
+ return 0;
+ if (!nfs_lookup(*hostname, family, sap, &salen))
+ /* nfs_lookup reports any errors */
+ return EX_FAIL;
+
+ if (nfs_advise_umount(sap, salen, &mnt_pmap, dirname) == 0)
+ /* nfs_advise_umount reports any errors */
+ return EX_FAIL;
+
+ return EX_SUCCESS;