2 Copyright (c) 2004 The Regents of the University of Michigan.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
9 1. Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14 3. Neither the name of the University nor the names of its
15 contributors may be used to endorse or promote products derived
16 from this software without specific prior written permission.
18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
25 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #endif /* HAVE_CONFIG_H */
39 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <netinet/in.h>
57 extern struct pollfd *pollarray;
58 extern unsigned long pollsize;
60 #define POLL_MILLISECS 500
62 static volatile int dir_changed = 1;
64 static void dir_notify_handler(__attribute__((unused))int sig)
70 scan_poll_results(int ret)
73 struct clnt_info *clp;
75 for (clp = clnt_list.tqh_first; clp != NULL; clp = clp->list.tqe_next)
77 i = clp->gssd_poll_index;
78 if (i >= 0 && pollarray[i].revents) {
79 if (pollarray[i].revents & POLLHUP) {
80 clp->gssd_close_me = 1;
83 if (pollarray[i].revents & POLLIN)
84 handle_gssd_upcall(clp);
85 pollarray[clp->gssd_poll_index].revents = 0;
90 i = clp->krb5_poll_index;
91 if (i >= 0 && pollarray[i].revents) {
92 if (pollarray[i].revents & POLLHUP) {
93 clp->krb5_close_me = 1;
96 if (pollarray[i].revents & POLLIN)
97 handle_krb5_upcall(clp);
98 pollarray[clp->krb5_poll_index].revents = 0;
107 topdirs_add_entry(struct dirent *dent)
109 struct topdirs_info *tdi;
111 tdi = calloc(sizeof(struct topdirs_info), 1);
113 printerr(0, "ERROR: Couldn't allocate struct topdirs_info\n");
116 tdi->dirname = malloc(PATH_MAX);
117 if (tdi->dirname == NULL) {
118 printerr(0, "ERROR: Couldn't allocate directory name\n");
122 snprintf(tdi->dirname, PATH_MAX, "%s/%s", pipefs_dir, dent->d_name);
123 tdi->fd = open(tdi->dirname, O_RDONLY);
125 printerr(0, "ERROR: failed to open %s\n", tdi->dirname);
129 fcntl(tdi->fd, F_SETSIG, DNOTIFY_SIGNAL);
130 fcntl(tdi->fd, F_NOTIFY, DN_CREATE|DN_DELETE|DN_MODIFY|DN_MULTISHOT);
132 TAILQ_INSERT_HEAD(&topdirs_list, tdi, list);
137 topdirs_free_list(void)
139 struct topdirs_info *tdi;
141 TAILQ_FOREACH(tdi, &topdirs_list, list) {
145 TAILQ_REMOVE(&topdirs_list, tdi, list);
151 topdirs_init_list(void)
157 TAILQ_INIT(&topdirs_list);
159 pipedir = opendir(pipefs_dir);
160 if (pipedir == NULL) {
161 printerr(0, "ERROR: could not open rpc_pipefs directory '%s': "
162 "%s\n", pipefs_dir, strerror(errno));
165 for (dent = readdir(pipedir); dent != NULL; dent = readdir(pipedir)) {
166 if (dent->d_type != DT_DIR ||
167 strcmp(dent->d_name, ".") == 0 ||
168 strcmp(dent->d_name, "..") == 0) {
171 ret = topdirs_add_entry(dent);
183 static void gssd_poll(struct pollfd *fds, unsigned long nfds)
188 sigemptyset(&emptyset);
189 ret = ppoll(fds, nfds, NULL, &emptyset);
192 printerr(0, "WARNING: error return from poll\n");
193 } else if (ret == 0) {
194 printerr(0, "WARNING: unexpected timeout\n");
196 scan_poll_results(ret);
199 #else /* !HAVE_PPOLL */
200 static void gssd_poll(struct pollfd *fds, unsigned long nfds)
204 /* race condition here: dir_changed could be set before we
205 * enter the poll, and we'd never notice if it weren't for the
207 ret = poll(fds, nfds, POLL_MILLISECS);
210 printerr(0, "WARNING: error return from poll\n");
211 } else if (ret == 0) {
213 } else { /* ret > 0 */
214 scan_poll_results(ret);
217 #endif /* !HAVE_PPOLL */
222 struct sigaction dn_act = {
223 .sa_handler = dir_notify_handler
227 sigemptyset(&dn_act.sa_mask);
228 sigaction(DNOTIFY_SIGNAL, &dn_act, NULL);
230 /* just in case the signal is blocked... */
232 sigaddset(&set, DNOTIFY_SIGNAL);
233 sigprocmask(SIG_UNBLOCK, &set, NULL);
235 if (topdirs_init_list() != 0)
240 printerr(1, "beginning poll\n");
242 while (dir_changed) {
244 if (update_client_list()) {
245 /* Error msg is already printed */
249 gssd_poll(pollarray, pollsize);