Add support for suppressing different NFS versions.

[nfs-utils.git] / utils / nfsd / nfsd.c

diff --git a/utils/nfsd/nfsd.c b/utils/nfsd/nfsd.c
index 772f72df54693751550eac1c9fbe978d427720b9..fa6ee71fdd6443245511a4b105df891017106905 100644 (file)
--- a/utils/nfsd/nfsd.c
+++ b/utils/nfsd/nfsd.c
@@ -7,7 +7,9 @@
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -17,20 +19,32 @@
 #include <errno.h>
 #include <getopt.h>
 #include <syslog.h>
+#include <netdb.h>
 #include "nfslib.h"
 
 static void    usage(const char *);
 
+static struct option longopts[] =
+{
+       { "help", 0, 0, 'h' },
+       { "no-nfs-version", 1, 0, 'N' },
+       { NULL, 0, 0, 0 }
+};
+unsigned int versbits = NFSCTL_ALLBITS;
+
 int
 main(int argc, char **argv)
 {
-       int     count = 1, c, error, port, fd;
-
-       port = 2049;
+       int     count = 1, c, error, port, fd, found_one;
+       struct servent *ent;
 
-       /* FIXME: Check for nfs in /etc/services */
+       ent = getservbyname ("nfs", "udp");
+       if (ent != NULL)
+               port = ntohs (ent->s_port);
+       else
+               port = 2049;
 
-       while ((c = getopt(argc, argv, "hp:P:")) != EOF) {
+       while ((c = getopt_long(argc, argv, "hN:p:P:", longopts, NULL)) != EOF) {
                switch(c) {
                case 'P':       /* XXX for nfs-server compatibility */
                case 'p':
@@ -41,12 +55,36 @@ main(int argc, char **argv)
                                usage(argv [0]);
                        }
                        break;
+               case 'N':
+                       switch((c = atoi(optarg))) {
+                       case 2:
+                       case 3:
+                       case 4:
+                               NFSCTL_VERUNSET(versbits, c);
+                               break;
+                       default:
+                               fprintf(stderr, "%c: Unsupported version\n", c);
+                               exit(1);
+                       }
                        break;
-               case 'h':
                default:
+                       fprintf(stderr, "Invalid argument: '%c'\n", c);
+               case 'h':
                        usage(argv[0]);
                }
        }
+       /*
+        * Do some sanity checking, if the ctlbits are set
+        */
+       found_one = 0;
+       for (c = NFSD_MINVERS; c <= NFSD_MAXVERS; c++) {
+               if (NFSCTL_VERISSET(versbits, c))
+                       found_one = 1;
+       }
+       if (!found_one) {
+               fprintf(stderr, "no version specified\n");
+               exit(1);
+       }                       
 
        if (chdir(NFS_STATEDIR)) {
                fprintf(stderr, "%s: chdir(%s) failed: %s\n",
@@ -63,7 +101,6 @@ main(int argc, char **argv)
                        count = 1;
                }
        }
-
        /* KLUDGE ALERT:
           Some kernels let nfsd kernel threads inherit open files
           from the program that spawns them (i.e. us).  So close
@@ -76,13 +113,11 @@ main(int argc, char **argv)
                (void) dup2(fd, 1);
                (void) dup2(fd, 2);
        }
-       fd = sysconf(_SC_OPEN_MAX);
-       while (--fd > 2)
-               (void) close(fd);
+       closeall(3);
 
-       if ((error = nfssvc(port, count)) < 0) {
+       openlog("nfsd", LOG_PID, LOG_DAEMON);
+       if ((error = nfssvc(port, count, versbits)) < 0) {
                int e = errno;
-               openlog("nfsd", LOG_PID, LOG_DAEMON);
                syslog(LOG_ERR, "nfssvc: %s", strerror(e));
                closelog();
        }
@@ -93,7 +128,8 @@ main(int argc, char **argv)
 static void
 usage(const char *prog)
 {
-       fprintf(stderr, "usage:\n"
-                       "%s nrservs\n", prog);
+       fprintf(stderr, "Usage:\n"
+               "%s [-p|-P|--port port] [-N|--no-nfs-version version ] nrservs\n", 
+               prog);
        exit(2);
 }