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;
60 #define POLL_MILLISECS 500
62 static volatile int dir_changed = 1;
64 static void dir_notify_handler(int sig, siginfo_t *si, void *data)
66 printerr(2, "dir_notify_handler: sig %d si %p data %p\n", sig, si, data);
72 scan_poll_results(int ret)
75 struct clnt_info *clp;
77 for (clp = clnt_list.tqh_first; clp != NULL; clp = clp->list.tqe_next)
79 i = clp->gssd_poll_index;
80 if (i >= 0 && pollarray[i].revents) {
81 if (pollarray[i].revents & POLLHUP)
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)
94 if (pollarray[i].revents & POLLIN)
95 handle_krb5_upcall(clp);
96 pollarray[clp->krb5_poll_index].revents = 0;
105 topdirs_add_entry(struct dirent *dent)
107 struct topdirs_info *tdi;
109 tdi = calloc(sizeof(struct topdirs_info), 1);
111 printerr(0, "ERROR: Couldn't allocate struct topdirs_info\n");
114 tdi->dirname = malloc(PATH_MAX);
115 if (tdi->dirname == NULL) {
116 printerr(0, "ERROR: Couldn't allocate directory name\n");
120 snprintf(tdi->dirname, PATH_MAX, "%s/%s", pipefs_dir, dent->d_name);
121 tdi->fd = open(tdi->dirname, O_RDONLY);
123 fcntl(tdi->fd, F_SETSIG, DNOTIFY_SIGNAL);
124 fcntl(tdi->fd, F_NOTIFY,
125 DN_CREATE|DN_DELETE|DN_MODIFY|DN_MULTISHOT);
128 TAILQ_INSERT_HEAD(&topdirs_list, tdi, list);
133 topdirs_free_list(void)
135 struct topdirs_info *tdi;
137 TAILQ_FOREACH(tdi, &topdirs_list, list) {
141 TAILQ_REMOVE(&topdirs_list, tdi, list);
147 topdirs_init_list(void)
153 TAILQ_INIT(&topdirs_list);
155 pipedir = opendir(pipefs_dir);
156 if (pipedir == NULL) {
157 printerr(0, "ERROR: could not open rpc_pipefs directory '%s': "
158 "%s\n", pipefs_dir, strerror(errno));
161 for (dent = readdir(pipedir); dent != NULL; dent = readdir(pipedir)) {
162 if (dent->d_type != DT_DIR ||
163 strcmp(dent->d_name, ".") == 0 ||
164 strcmp(dent->d_name, "..") == 0) {
167 ret = topdirs_add_entry(dent);
182 struct sigaction dn_act;
185 /* Taken from linux/Documentation/dnotify.txt: */
186 dn_act.sa_sigaction = dir_notify_handler;
187 sigemptyset(&dn_act.sa_mask);
188 dn_act.sa_flags = SA_SIGINFO;
189 sigaction(DNOTIFY_SIGNAL, &dn_act, NULL);
191 /* just in case the signal is blocked... */
193 sigaddset(&set, DNOTIFY_SIGNAL);
194 sigprocmask(SIG_UNBLOCK, &set, NULL);
196 if (topdirs_init_list() != 0)
201 printerr(1, "beginning poll\n");
203 while (dir_changed) {
205 if (update_client_list()) {
206 /* Error msg is already printed */
210 /* race condition here: dir_changed could be set before we
211 * enter the poll, and we'd never notice if it weren't for the
213 ret = poll(pollarray, pollsize, POLL_MILLISECS);
217 "WARNING: error return from poll\n");
218 } else if (ret == 0) {
220 } else { /* ret > 0 */
221 scan_poll_results(ret);