1*a4ac8bb3Sdnielsen /*
2*a4ac8bb3Sdnielsen * CDDL HEADER START
3*a4ac8bb3Sdnielsen *
4*a4ac8bb3Sdnielsen * The contents of this file are subject to the terms of the
5*a4ac8bb3Sdnielsen * Common Development and Distribution License (the "License").
6*a4ac8bb3Sdnielsen * You may not use this file except in compliance with the License.
7*a4ac8bb3Sdnielsen *
8*a4ac8bb3Sdnielsen * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*a4ac8bb3Sdnielsen * or http://www.opensolaris.org/os/licensing.
10*a4ac8bb3Sdnielsen * See the License for the specific language governing permissions
11*a4ac8bb3Sdnielsen * and limitations under the License.
12*a4ac8bb3Sdnielsen *
13*a4ac8bb3Sdnielsen * When distributing Covered Code, include this CDDL HEADER in each
14*a4ac8bb3Sdnielsen * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*a4ac8bb3Sdnielsen * If applicable, add the following below this CDDL HEADER, with the
16*a4ac8bb3Sdnielsen * fields enclosed by brackets "[]" replaced with your own identifying
17*a4ac8bb3Sdnielsen * information: Portions Copyright [yyyy] [name of copyright owner]
18*a4ac8bb3Sdnielsen *
19*a4ac8bb3Sdnielsen * CDDL HEADER END
20*a4ac8bb3Sdnielsen */
21*a4ac8bb3Sdnielsen /*
22*a4ac8bb3Sdnielsen * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23*a4ac8bb3Sdnielsen * Use is subject to license terms.
24*a4ac8bb3Sdnielsen */
25*a4ac8bb3Sdnielsen
26*a4ac8bb3Sdnielsen #include <sys/param.h>
27*a4ac8bb3Sdnielsen #include <sys/stat.h>
28*a4ac8bb3Sdnielsen #include <sys/types.h>
29*a4ac8bb3Sdnielsen #include <sys/sysevent/eventdefs.h>
30*a4ac8bb3Sdnielsen #include <sys/sysevent/dr.h>
31*a4ac8bb3Sdnielsen
32*a4ac8bb3Sdnielsen #include <stdio.h>
33*a4ac8bb3Sdnielsen #include <stdlib.h>
34*a4ac8bb3Sdnielsen #include <unistd.h>
35*a4ac8bb3Sdnielsen #include <signal.h>
36*a4ac8bb3Sdnielsen #include <syslog.h>
37*a4ac8bb3Sdnielsen #include <string.h>
38*a4ac8bb3Sdnielsen #include <fcntl.h>
39*a4ac8bb3Sdnielsen #include <errno.h>
40*a4ac8bb3Sdnielsen #include <time.h>
41*a4ac8bb3Sdnielsen #include <config_admin.h>
42*a4ac8bb3Sdnielsen #include <libsysevent.h>
43*a4ac8bb3Sdnielsen
44*a4ac8bb3Sdnielsen
45*a4ac8bb3Sdnielsen /* Signal handler type */
46*a4ac8bb3Sdnielsen typedef void (SigHandler)(int);
47*a4ac8bb3Sdnielsen /* oplhpd process id file descriptor */
48*a4ac8bb3Sdnielsen static int pid_fd;
49*a4ac8bb3Sdnielsen
50*a4ac8bb3Sdnielsen /* Program Name */
51*a4ac8bb3Sdnielsen char *oplhpd_prog_name = "";
52*a4ac8bb3Sdnielsen
53*a4ac8bb3Sdnielsen /* Macros */
54*a4ac8bb3Sdnielsen #define OPLHPD_DEV_DIR "/devices" /* device base dir */
55*a4ac8bb3Sdnielsen #define OPLHPD_PID_FILE "/var/run/oplhpd.pid" /* lock file path */
56*a4ac8bb3Sdnielsen #define OPLHPD_PROG_NAME oplhpd_prog_name
57*a4ac8bb3Sdnielsen
58*a4ac8bb3Sdnielsen /* Event handler to get information */
59*a4ac8bb3Sdnielsen static sysevent_handle_t *oplhpd_hdl;
60*a4ac8bb3Sdnielsen
61*a4ac8bb3Sdnielsen
62*a4ac8bb3Sdnielsen /*
63*a4ac8bb3Sdnielsen * Function Prototypes
64*a4ac8bb3Sdnielsen */
65*a4ac8bb3Sdnielsen void quit_daemon(int signo);
66*a4ac8bb3Sdnielsen SigHandler *set_sig_handler(int sig, SigHandler *handler);
67*a4ac8bb3Sdnielsen void init_daemon(void);
68*a4ac8bb3Sdnielsen void oplhpd_init(void);
69*a4ac8bb3Sdnielsen void oplhpd_fini(void);
70*a4ac8bb3Sdnielsen static void oplhpd_event(sysevent_t *ev);
71*a4ac8bb3Sdnielsen
72*a4ac8bb3Sdnielsen extern void notify_scf_of_hotplug(sysevent_t *ev);
73*a4ac8bb3Sdnielsen
74*a4ac8bb3Sdnielsen
75*a4ac8bb3Sdnielsen /*
76*a4ac8bb3Sdnielsen * Terminate and Quit Daemon Process.
77*a4ac8bb3Sdnielsen * signo = 0 ... normal quit
78*a4ac8bb3Sdnielsen * > 0 ... signaled quit
79*a4ac8bb3Sdnielsen * < 0 ... failure quit
80*a4ac8bb3Sdnielsen */
81*a4ac8bb3Sdnielsen void
quit_daemon(int signo)82*a4ac8bb3Sdnielsen quit_daemon(int signo)
83*a4ac8bb3Sdnielsen {
84*a4ac8bb3Sdnielsen int status = 0;
85*a4ac8bb3Sdnielsen id_t pgid;
86*a4ac8bb3Sdnielsen
87*a4ac8bb3Sdnielsen syslog(LOG_DEBUG, "*** quit daemon [pid:%d, signal#:%d].\n",
88*a4ac8bb3Sdnielsen getpid(), signo);
89*a4ac8bb3Sdnielsen
90*a4ac8bb3Sdnielsen (void) set_sig_handler(SIGTERM, SIG_IGN);
91*a4ac8bb3Sdnielsen pgid = getpgrp();
92*a4ac8bb3Sdnielsen (void) kill(-pgid, SIGTERM);
93*a4ac8bb3Sdnielsen
94*a4ac8bb3Sdnielsen (void) close(pid_fd);
95*a4ac8bb3Sdnielsen (void) unlink(OPLHPD_PID_FILE); /* clean up lock file */
96*a4ac8bb3Sdnielsen
97*a4ac8bb3Sdnielsen if (signo < 0) {
98*a4ac8bb3Sdnielsen status = signo;
99*a4ac8bb3Sdnielsen }
100*a4ac8bb3Sdnielsen _exit(status);
101*a4ac8bb3Sdnielsen }
102*a4ac8bb3Sdnielsen
103*a4ac8bb3Sdnielsen /*
104*a4ac8bb3Sdnielsen * Setting the signal handler utility
105*a4ac8bb3Sdnielsen */
106*a4ac8bb3Sdnielsen SigHandler *
set_sig_handler(int sig,SigHandler * handler)107*a4ac8bb3Sdnielsen set_sig_handler(int sig, SigHandler *handler)
108*a4ac8bb3Sdnielsen {
109*a4ac8bb3Sdnielsen struct sigaction act, oact;
110*a4ac8bb3Sdnielsen
111*a4ac8bb3Sdnielsen act.sa_handler = handler;
112*a4ac8bb3Sdnielsen act.sa_flags = 0;
113*a4ac8bb3Sdnielsen if (sig == SIGCHLD && handler == SIG_IGN) {
114*a4ac8bb3Sdnielsen act.sa_flags |= SA_NOCLDWAIT;
115*a4ac8bb3Sdnielsen }
116*a4ac8bb3Sdnielsen (void) sigemptyset(&act.sa_mask);
117*a4ac8bb3Sdnielsen (void) sigemptyset(&oact.sa_mask);
118*a4ac8bb3Sdnielsen if (sigaction(sig, &act, &oact) < 0) {
119*a4ac8bb3Sdnielsen return (SIG_ERR);
120*a4ac8bb3Sdnielsen }
121*a4ac8bb3Sdnielsen
122*a4ac8bb3Sdnielsen return (oact.sa_handler);
123*a4ac8bb3Sdnielsen }
124*a4ac8bb3Sdnielsen
125*a4ac8bb3Sdnielsen /*
126*a4ac8bb3Sdnielsen * Setup oplhpd daemon
127*a4ac8bb3Sdnielsen */
128*a4ac8bb3Sdnielsen void
init_daemon()129*a4ac8bb3Sdnielsen init_daemon()
130*a4ac8bb3Sdnielsen {
131*a4ac8bb3Sdnielsen int i;
132*a4ac8bb3Sdnielsen int ret;
133*a4ac8bb3Sdnielsen int fd;
134*a4ac8bb3Sdnielsen pid_t pid;
135*a4ac8bb3Sdnielsen char pid_str[32];
136*a4ac8bb3Sdnielsen
137*a4ac8bb3Sdnielsen if (geteuid() != 0) {
138*a4ac8bb3Sdnielsen syslog(LOG_ERR, "must be root to execute %s\n",
139*a4ac8bb3Sdnielsen OPLHPD_PROG_NAME);
140*a4ac8bb3Sdnielsen exit(1);
141*a4ac8bb3Sdnielsen }
142*a4ac8bb3Sdnielsen
143*a4ac8bb3Sdnielsen /*
144*a4ac8bb3Sdnielsen * Daemonize
145*a4ac8bb3Sdnielsen */
146*a4ac8bb3Sdnielsen if ((pid = fork()) < 0) {
147*a4ac8bb3Sdnielsen perror("fork failed");
148*a4ac8bb3Sdnielsen exit(1);
149*a4ac8bb3Sdnielsen }
150*a4ac8bb3Sdnielsen if (pid > 0) {
151*a4ac8bb3Sdnielsen /* Parent, exit. */
152*a4ac8bb3Sdnielsen exit(0);
153*a4ac8bb3Sdnielsen }
154*a4ac8bb3Sdnielsen (void) setsid();
155*a4ac8bb3Sdnielsen (void) chdir("/");
156*a4ac8bb3Sdnielsen (void) umask(0);
157*a4ac8bb3Sdnielsen (void) closefrom(0);
158*a4ac8bb3Sdnielsen (void) open("/dev/null", O_RDONLY);
159*a4ac8bb3Sdnielsen (void) open("/dev/null", O_WRONLY);
160*a4ac8bb3Sdnielsen (void) dup(1);
161*a4ac8bb3Sdnielsen
162*a4ac8bb3Sdnielsen (void) openlog(OPLHPD_PROG_NAME, LOG_PID, LOG_DAEMON);
163*a4ac8bb3Sdnielsen
164*a4ac8bb3Sdnielsen /*
165*a4ac8bb3Sdnielsen * Create the lock file for singletonize
166*a4ac8bb3Sdnielsen */
167*a4ac8bb3Sdnielsen if ((pid_fd = open(OPLHPD_PID_FILE, O_RDWR | O_CREAT, 0644)) < 0) {
168*a4ac8bb3Sdnielsen syslog(LOG_ERR, "could not create pid file: %s",
169*a4ac8bb3Sdnielsen strerror(errno));
170*a4ac8bb3Sdnielsen exit(1);
171*a4ac8bb3Sdnielsen }
172*a4ac8bb3Sdnielsen if (lockf(pid_fd, F_TLOCK, 0L) < 0) {
173*a4ac8bb3Sdnielsen if (errno == EACCES || errno == EAGAIN) {
174*a4ac8bb3Sdnielsen syslog(LOG_ERR, "another oplhpd is already running");
175*a4ac8bb3Sdnielsen } else {
176*a4ac8bb3Sdnielsen syslog(LOG_ERR, "could not lock pid file");
177*a4ac8bb3Sdnielsen }
178*a4ac8bb3Sdnielsen exit(1);
179*a4ac8bb3Sdnielsen }
180*a4ac8bb3Sdnielsen
181*a4ac8bb3Sdnielsen (void) ftruncate(pid_fd, 0);
182*a4ac8bb3Sdnielsen i = sprintf(pid_str, "%d\n", getpid());
183*a4ac8bb3Sdnielsen while ((ret = write(pid_fd, pid_str, i)) != i) {
184*a4ac8bb3Sdnielsen if (errno == EINTR) {
185*a4ac8bb3Sdnielsen continue;
186*a4ac8bb3Sdnielsen }
187*a4ac8bb3Sdnielsen if (ret < 0) {
188*a4ac8bb3Sdnielsen syslog(LOG_ERR, "pid file write fail: %s",
189*a4ac8bb3Sdnielsen strerror(errno));
190*a4ac8bb3Sdnielsen exit(1);
191*a4ac8bb3Sdnielsen }
192*a4ac8bb3Sdnielsen }
193*a4ac8bb3Sdnielsen
194*a4ac8bb3Sdnielsen /*
195*a4ac8bb3Sdnielsen * Set signal handlers
196*a4ac8bb3Sdnielsen */
197*a4ac8bb3Sdnielsen (void) set_sig_handler(SIGTERM, (SigHandler *)quit_daemon);
198*a4ac8bb3Sdnielsen (void) set_sig_handler(SIGQUIT, (SigHandler *)quit_daemon);
199*a4ac8bb3Sdnielsen (void) set_sig_handler(SIGINT, (SigHandler *)quit_daemon);
200*a4ac8bb3Sdnielsen (void) set_sig_handler(SIGCHLD, SIG_IGN);
201*a4ac8bb3Sdnielsen }
202*a4ac8bb3Sdnielsen
203*a4ac8bb3Sdnielsen static void
oplhpd_event(sysevent_t * ev)204*a4ac8bb3Sdnielsen oplhpd_event(sysevent_t *ev)
205*a4ac8bb3Sdnielsen {
206*a4ac8bb3Sdnielsen /*
207*a4ac8bb3Sdnielsen * Inform the SCF of the change in the state of the pci hot plug
208*a4ac8bb3Sdnielsen * cassette.
209*a4ac8bb3Sdnielsen */
210*a4ac8bb3Sdnielsen notify_scf_of_hotplug(ev);
211*a4ac8bb3Sdnielsen
212*a4ac8bb3Sdnielsen }
213*a4ac8bb3Sdnielsen
214*a4ac8bb3Sdnielsen /*
215*a4ac8bb3Sdnielsen * Initialization for hotplug event.
216*a4ac8bb3Sdnielsen * - Bind event handler.
217*a4ac8bb3Sdnielsen * - Subscribe the handler to the hotplug event.
218*a4ac8bb3Sdnielsen */
219*a4ac8bb3Sdnielsen void
oplhpd_init()220*a4ac8bb3Sdnielsen oplhpd_init()
221*a4ac8bb3Sdnielsen {
222*a4ac8bb3Sdnielsen const char *subclass = ESC_DR_AP_STATE_CHANGE;
223*a4ac8bb3Sdnielsen
224*a4ac8bb3Sdnielsen syslog(LOG_DEBUG, "oplhpd_init");
225*a4ac8bb3Sdnielsen
226*a4ac8bb3Sdnielsen oplhpd_hdl = sysevent_bind_handle(oplhpd_event);
227*a4ac8bb3Sdnielsen if (oplhpd_hdl == NULL) {
228*a4ac8bb3Sdnielsen syslog(LOG_ERR, "event handler bind fail");
229*a4ac8bb3Sdnielsen quit_daemon(-1);
230*a4ac8bb3Sdnielsen }
231*a4ac8bb3Sdnielsen
232*a4ac8bb3Sdnielsen if (sysevent_subscribe_event(oplhpd_hdl, EC_DR, &subclass, 1) != 0) {
233*a4ac8bb3Sdnielsen syslog(LOG_ERR, "event handler subscribe fail");
234*a4ac8bb3Sdnielsen sysevent_unbind_handle(oplhpd_hdl);
235*a4ac8bb3Sdnielsen quit_daemon(-1);
236*a4ac8bb3Sdnielsen }
237*a4ac8bb3Sdnielsen
238*a4ac8bb3Sdnielsen for (;;) {
239*a4ac8bb3Sdnielsen (void) pause();
240*a4ac8bb3Sdnielsen }
241*a4ac8bb3Sdnielsen }
242*a4ac8bb3Sdnielsen
243*a4ac8bb3Sdnielsen void
oplhpd_fini()244*a4ac8bb3Sdnielsen oplhpd_fini()
245*a4ac8bb3Sdnielsen {
246*a4ac8bb3Sdnielsen if (oplhpd_hdl != NULL) {
247*a4ac8bb3Sdnielsen sysevent_unsubscribe_event(oplhpd_hdl, EC_DR);
248*a4ac8bb3Sdnielsen sysevent_unbind_handle(oplhpd_hdl);
249*a4ac8bb3Sdnielsen }
250*a4ac8bb3Sdnielsen }
251*a4ac8bb3Sdnielsen
252*a4ac8bb3Sdnielsen int
main(int argc,char * argv[])253*a4ac8bb3Sdnielsen main(int argc, char *argv[])
254*a4ac8bb3Sdnielsen {
255*a4ac8bb3Sdnielsen int opt;
256*a4ac8bb3Sdnielsen
257*a4ac8bb3Sdnielsen /* Get Program Name */
258*a4ac8bb3Sdnielsen if ((oplhpd_prog_name = strrchr(argv[0], '/')) == NULL) {
259*a4ac8bb3Sdnielsen oplhpd_prog_name = argv[0];
260*a4ac8bb3Sdnielsen } else {
261*a4ac8bb3Sdnielsen oplhpd_prog_name++;
262*a4ac8bb3Sdnielsen }
263*a4ac8bb3Sdnielsen
264*a4ac8bb3Sdnielsen /* Check the daemon running lock and Initialize the signal */
265*a4ac8bb3Sdnielsen init_daemon();
266*a4ac8bb3Sdnielsen
267*a4ac8bb3Sdnielsen /* Subscribe to the hotplug event */
268*a4ac8bb3Sdnielsen oplhpd_init();
269*a4ac8bb3Sdnielsen
270*a4ac8bb3Sdnielsen /* Unsubscribe the hotplug event */
271*a4ac8bb3Sdnielsen oplhpd_fini();
272*a4ac8bb3Sdnielsen
273*a4ac8bb3Sdnielsen return (0);
274*a4ac8bb3Sdnielsen }
275