4 Copyright (c) 2000 The Regents of the University of Michigan.
7 Copyright (c) 2000 Dug Song <dugsong@UMICH.EDU>.
8 Copyright (c) 2002 Andy Adamson <andros@UMICH.EDU>.
9 Copyright (c) 2002 Marius Aamodt Eriksen <marius@UMICH.EDU>.
10 Copyright (c) 2002 J. Bruce Fields <bfields@UMICH.EDU>.
11 All rights reserved, all wrongs reversed.
13 Redistribution and use in source and binary forms, with or without
14 modification, are permitted provided that the following conditions
17 1. Redistributions of source code must retain the above copyright
18 notice, this list of conditions and the following disclaimer.
19 2. Redistributions in binary form must reproduce the above copyright
20 notice, this list of conditions and the following disclaimer in the
21 documentation and/or other materials provided with the distribution.
22 3. Neither the name of the University nor the names of its
23 contributors may be used to endorse or promote products derived
24 from this software without specific prior written permission.
26 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
29 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
33 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 #include <sys/param.h>
41 #include <sys/types.h>
43 #include <sys/socket.h>
60 * mydaemon creates a pipe between the partent and child
61 * process. The parent process will wait until the
62 * child dies or writes a '1' on the pipe signaling
63 * that it started successfully.
65 int pipefds[2] = { -1, -1};
68 mydaemon(int nochdir, int noclose)
70 int pid, status, tempfd, fdmax, filedes;
72 if (pipe(pipefds) < 0) {
73 printerr(1, "mydaemon: pipe() failed: errno %d (%s)\n",
74 errno, strerror(errno));
77 if ((pid = fork ()) < 0) {
78 printerr(1, "mydaemon: fork() failed: errno %d (%s)\n",
79 errno, strerror(errno));
85 * Parent. Wait for status from child.
88 if (read(pipefds[0], &status, 1) != 1)
96 if (chdir ("/") == -1) {
97 printerr(1, "mydaemon: chdir() failed: errno %d (%s)\n",
98 errno, strerror(errno));
103 while (pipefds[1] <= 2) {
104 pipefds[1] = dup(pipefds[1]);
105 if (pipefds[1] < 0) {
106 printerr(1, "mydaemon: dup() failed: errno %d (%s)\n",
107 errno, strerror(errno));
113 tempfd = open("/dev/null", O_RDWR);
114 close(0); dup2(tempfd, 0);
115 close(1); dup2(tempfd, 1);
116 close(2); dup2(tempfd, 2);
117 fdmax = sysconf (_SC_OPEN_MAX);
118 for (filedes = 3; filedes < fdmax; filedes++)
119 if (filedes != pipefds[1])
131 if (pipefds[1] > 0) {
132 write(pipefds[1], &status, 1);
141 /* destroy krb5 machine creds */
142 printerr(1, "exiting on signal %d\n", signal);
149 /* don't exit on SIGHUP */
150 printerr(1, "Received SIGHUP... Ignoring.\n");
155 usage(char *progname)
157 fprintf(stderr, "usage: %s [-n] [-f] [-v]\n",
163 main(int argc, char *argv[])
172 while ((opt = getopt(argc, argv, "fvnp:")) != -1) {
189 if ((progname = strrchr(argv[0], '/')))
194 initerr(progname, verbosity, fg);
199 signal(SIGINT, sig_die);
200 signal(SIGTERM, sig_die);
201 signal(SIGHUP, sig_hup);
203 if (get_creds && !gssd_acquire_cred(GSSD_SERVICE_NAME)) {
204 printerr(0, "unable to obtain root (machine) credentials\n");
205 printerr(0, "do you have a keytab entry for "
206 "nfs/<your.host>@<YOUR.REALM> in "
207 "/etc/krb5.keytab?\n");
215 printerr(0, "gssd_run returned!\n");