--- /dev/null
+/*
+ gssd.c
+
+ Copyright (c) 2000 The Regents of the University of Michigan.
+ All rights reserved.
+
+ Copyright (c) 2000 Dug Song <dugsong@UMICH.EDU>.
+ Copyright (c) 2002 Andy Adamson <andros@UMICH.EDU>.
+ Copyright (c) 2002 Marius Aamodt Eriksen <marius@UMICH.EDU>.
+ Copyright (c) 2002 J. Bruce Fields <bfields@UMICH.EDU>.
+ All rights reserved, all wrongs reversed.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ 3. Neither the name of the University nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <rpc/rpc.h>
+#include <fcntl.h>
+#include <errno.h>
+
+
+#include <unistd.h>
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include "svcgssd.h"
+#include "gss_util.h"
+#include "err_util.h"
+
+/*
+ * mydaemon creates a pipe between the partent and child
+ * process. The parent process will wait until the
+ * child dies or writes a '1' on the pipe signaling
+ * that it started successfully.
+ */
+int pipefds[2] = { -1, -1};
+
+static void
+mydaemon(int nochdir, int noclose)
+{
+ int pid, status, tempfd, fdmax, filedes;
+
+ if (pipe(pipefds) < 0) {
+ printerr(1, "mydaemon: pipe() failed: errno %d (%s)\n",
+ errno, strerror(errno));
+ exit(1);
+ }
+ if ((pid = fork ()) < 0) {
+ printerr(1, "mydaemon: fork() failed: errno %d (%s)\n",
+ errno, strerror(errno));
+ exit(1);
+ }
+
+ if (pid != 0) {
+ /*
+ * Parent. Wait for status from child.
+ */
+ close(pipefds[1]);
+ if (read(pipefds[0], &status, 1) != 1)
+ exit(1);
+ exit (0);
+ }
+ /* Child. */
+ close(pipefds[0]);
+ setsid ();
+ if (nochdir == 0) {
+ if (chdir ("/") == -1) {
+ printerr(1, "mydaemon: chdir() failed: errno %d (%s)\n",
+ errno, strerror(errno));
+ exit(1);
+ }
+ }
+
+ while (pipefds[1] <= 2) {
+ pipefds[1] = dup(pipefds[1]);
+ if (pipefds[1] < 0) {
+ printerr(1, "mydaemon: dup() failed: errno %d (%s)\n",
+ errno, strerror(errno));
+ exit(1);
+ }
+ }
+
+ if (noclose == 0) {
+ tempfd = open("/dev/null", O_RDWR);
+ close(0); dup2(tempfd, 0);
+ close(1); dup2(tempfd, 1);
+ close(2); dup2(tempfd, 2);
+ fdmax = sysconf (_SC_OPEN_MAX);
+ for (filedes = 3; filedes < fdmax; filedes++)
+ if (filedes != pipefds[1])
+ close (filedes);
+ }
+
+ return;
+}
+
+static void
+release_parent()
+{
+ int status;
+
+ if (pipefds[1] > 0) {
+ write(pipefds[1], &status, 1);
+ close(pipefds[1]);
+ pipefds[1] = -1;
+ }
+}
+
+void
+sig_die(int signal)
+{
+ /* destroy krb5 machine creds */
+ printerr(1, "exiting on signal %d\n", signal);
+ exit(1);
+}
+
+static void
+usage(char *progname)
+{
+ fprintf(stderr, "usage: %s [-n] [-f] [-v]\n",
+ progname);
+ exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+ int get_creds = 1;
+ int fg = 0;
+ int verbosity = 0;
+ int opt;
+ extern char *optarg;
+ char *progname;
+
+ while ((opt = getopt(argc, argv, "fvnp:")) != -1) {
+ switch (opt) {
+ case 'f':
+ fg = 1;
+ break;
+ case 'n':
+ get_creds = 0;
+ break;
+ case 'v':
+ verbosity++;
+ break;
+ default:
+ usage(argv[0]);
+ break;
+ }
+ }
+
+ if ((progname = strrchr(argv[0], '/')))
+ progname++;
+ else
+ progname = argv[0];
+
+ initerr(progname, verbosity, fg);
+
+ if (!fg)
+ mydaemon(0, 0);
+
+ signal(SIGINT, sig_die);
+ signal(SIGTERM, sig_die);
+ signal(SIGHUP, sig_die);
+
+ if (get_creds && !gssd_acquire_cred(GSSD_SERVICE_NAME)) {
+ printerr(0, "unable to obtain root (machine) credentials\n");
+ printerr(0, "do you have a keytab entry for "
+ "nfs/<your.host>@<YOUR.REALM> in "
+ "/etc/krb5.keytab?\n");
+ exit(1);
+ }
+
+ if (!fg)
+ release_parent();
+
+ gssd_run();
+ printerr(0, "gssd_run returned!\n");
+ abort();
+}
projects / nfs-utils.git / blobdiff