/* $NetBSD: apmd.c,v 1.22 2002/01/11 04:35:52 itojun Exp $ */ /*- * Copyright (c) 1996, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by John Kohl. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pathnames.h" #include "apm-proto.h" #define MAX(a,b) (a > b ? a : b) #define TRUE 1 #define FALSE 0 #define POWER_STATUS_ACON 0x1 #define POWER_STATUS_LOWBATTNOW 0x2 const char apmdev[] = _PATH_APM_CTLDEV; const char sockfile[] = _PATH_APM_SOCKET; static int debug = 0; static int verbose = 0; void usage (void); int power_status (int fd, int force, struct apm_power_info *pinfo); int bind_socket (const char *sn, mode_t mode, uid_t uid, gid_t gid); enum apm_state handle_client(int sock_fd, int ctl_fd); void suspend(int ctl_fd); void stand_by(int ctl_fd); void resume(int ctl_fd); void sigexit(int signo); void make_noise(int howmany); void do_etc_file(const char *file); void do_ac_state(int state); void sigexit(int signo) { exit(1); } void usage(void) { fprintf(stderr,"usage: %s [-adlqsv] [-t seconds] [-S sockname]\n\t[-m sockmode] [-o sockowner:sockgroup] [-f devname]\n", getprogname()); exit(1); } int power_status(int fd, int force, struct apm_power_info *pinfo) { struct apm_power_info bstate; static struct apm_power_info last; int acon = 0; int lowbattnow = 0; memset(&bstate, 0, sizeof(bstate)); if (ioctl(fd, APM_IOC_GETPOWER, &bstate) == 0) { /* various conditions under which we report status: something changed enough since last report, or asked to force a print */ if (bstate.ac_state == APM_AC_ON) acon = 1; if (bstate.battery_state != last.battery_state && bstate.battery_state == APM_BATT_LOW) lowbattnow = 1; if (force || bstate.ac_state != last.ac_state || bstate.battery_state != last.battery_state || (bstate.minutes_left && bstate.minutes_left < 15) || abs(bstate.battery_life - last.battery_life) > 20) { if (verbose) { if (bstate.minutes_left) syslog(LOG_NOTICE, "battery status: %s. external power status: %s. " "estimated battery life %d%% (%d minutes)", battstate(bstate.battery_state), ac_state(bstate.ac_state), bstate.battery_life, bstate.minutes_left); else syslog(LOG_NOTICE, "battery status: %s. external power status: %s. " "estimated battery life %d%%", battstate(bstate.battery_state), ac_state(bstate.ac_state), bstate.battery_life); } last = bstate; } if (pinfo) *pinfo = bstate; } else syslog(LOG_ERR, "cannot fetch power status: %m"); return ((acon?POWER_STATUS_ACON:0) | (lowbattnow?POWER_STATUS_LOWBATTNOW:0)); } static char *socketname; static void sockunlink(void); static void sockunlink(void) { if (socketname) (void) remove(socketname); } int bind_socket(const char *sockname, mode_t mode, uid_t uid, gid_t gid) { int sock; struct sockaddr_un s_un; sock = socket(AF_LOCAL, SOCK_STREAM, 0); if (sock == -1) err(1, "cannot create local socket"); s_un.sun_family = AF_LOCAL; strncpy(s_un.sun_path, sockname, sizeof(s_un.sun_path)); s_un.sun_len = SUN_LEN(&s_un); /* remove it if present, we're moving in */ (void) remove(sockname); if (bind(sock, (struct sockaddr *)&s_un, s_un.sun_len) == -1) err(1, "cannot create APM socket"); if (chmod(sockname, mode) == -1 || chown(sockname, uid, gid) == -1) err(1, "cannot set socket mode/owner/group to %o/%d/%d", mode, uid, gid); listen(sock, 1); socketname = strdup(sockname); atexit(sockunlink); return sock; } enum apm_state handle_client(int sock_fd, int ctl_fd) { /* accept a handle from the client, process it, then clean up */ int cli_fd; struct sockaddr_un from; int fromlen = sizeof(from); struct apm_command cmd; struct apm_reply reply; cli_fd = accept(sock_fd, (struct sockaddr *)&from, &fromlen); if (cli_fd == -1) { syslog(LOG_INFO, "client accept failure: %m"); return NORMAL; } if (recv(cli_fd, &cmd, sizeof(cmd), 0) != sizeof(cmd)) { (void) close(cli_fd); syslog(LOG_INFO, "client size botch"); return NORMAL; } if (cmd.vno != APMD_VNO) { close(cli_fd); /* terminate client */ /* no error message, just drop it. */ return NORMAL; } power_status(ctl_fd, 0, &reply.batterystate); switch (cmd.action) { default: reply.newstate = NORMAL; break; case SUSPEND: reply.newstate = SUSPENDING; break; case STANDBY: reply.newstate = STANDING_BY; break; } reply.vno = APMD_VNO; if (send(cli_fd, &reply, sizeof(reply), 0) != sizeof(reply)) { syslog(LOG_INFO, "client reply botch"); } close(cli_fd); return reply.newstate; } static int speaker_ok = TRUE; void make_noise(howmany) int howmany; { int spkrfd; int trycnt; if (!speaker_ok) /* don't bother after sticky errors */ return; for (trycnt = 0; trycnt < 3; trycnt++) { spkrfd = open(_PATH_DEV_SPEAKER, O_WRONLY); if (spkrfd == -1) { switch (errno) { case EBUSY: usleep(500000); errno = EBUSY; continue; case ENOENT: case ENODEV: case ENXIO: case EPERM: case EACCES: syslog(LOG_INFO, "speaker device " _PATH_DEV_SPEAKER " unavailable: %m"); speaker_ok = FALSE; return; } } else break; } if (spkrfd == -1) { syslog(LOG_WARNING, "cannot open " _PATH_DEV_SPEAKER ": %m"); return; } syslog(LOG_DEBUG, "sending %d tones to speaker\n", howmany); write (spkrfd, "o4cc", 2 + howmany); close(spkrfd); return; } void suspend(int ctl_fd) { do_etc_file(_PATH_APM_ETC_SUSPEND); sync(); make_noise(2); sync(); sync(); sleep(1); ioctl(ctl_fd, APM_IOC_SUSPEND, 0); } void stand_by(int ctl_fd) { do_etc_file(_PATH_APM_ETC_STANDBY); sync(); make_noise(1); sync(); sync(); sleep(1); ioctl(ctl_fd, APM_IOC_STANDBY, 0); } #define TIMO (10*60) /* 10 minutes */ void resume(int ctl_fd) { do_etc_file(_PATH_APM_ETC_RESUME); } int main(int argc, char *argv[]) { const char *fname = apmdev; int ctl_fd, sock_fd, ch, ready; int statonly = 0; fd_set devfds; fd_set selcopy; struct apm_event_info apmevent; int suspends, standbys, resumes; int ac_is_off; int noacsleep = 0; int lowbattsleep = 0; mode_t mode = 0660; struct timeval tv = {TIMO, 0}, stv; const char *sockname = sockfile; char *user, *group; char *scratch; uid_t uid = 0; gid_t gid = 0; struct passwd *pw; struct group *gr; while ((ch = getopt(argc, argv, "adlqsvf:t:S:m:o:")) != -1) switch(ch) { case 'q': speaker_ok = FALSE; break; case 'a': noacsleep = 1; break; case 'l': lowbattsleep = 1; break; case 'd': debug = 1; break; case 'v': verbose = 1; break; case 'f': fname = optarg; break; case 'S': sockname = optarg; break; case 't': tv.tv_sec = strtoul(optarg, 0, 0); if (tv.tv_sec == 0) usage(); break; case 'm': mode = strtoul(optarg, 0, 8); if (mode == 0) usage(); break; case 'o': /* (user):(group) */ user = optarg; group = strchr(user, ':'); if (group) *group++ = '\0'; if (*user) { uid = strtoul(user, &scratch, 0); if (*scratch != '\0') { pw = getpwnam(user); if (pw) uid = pw->pw_uid; else errx(1, "user name `%s' unknown", user); } } if (group && *group) { gid = strtoul(group, &scratch, 0); if (*scratch != '\0') { gr = getgrnam(group); if (gr) gid = gr->gr_gid; else errx(1, "group name `%s' unknown", group); } } break; case 's': /* status only */ statonly = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; if (debug) { openlog("apmd", 0, LOG_LOCAL1); } else { daemon(0, 0); openlog("apmd", 0, LOG_DAEMON); setlogmask(LOG_UPTO(LOG_NOTICE)); pidfile(NULL); } if ((ctl_fd = open(fname, O_RDWR)) == -1) { syslog(LOG_ERR, "cannot open device file `%s'", fname); exit(1); } if (statonly) { power_status(ctl_fd, 1, 0); exit(0); } else { struct apm_power_info pinfo; power_status(ctl_fd, 1, &pinfo); do_ac_state(pinfo.ac_state); ac_is_off = (pinfo.ac_state == APM_AC_OFF); } (void) signal(SIGTERM, sigexit); (void) signal(SIGHUP, sigexit); (void) signal(SIGINT, sigexit); (void) signal(SIGPIPE, SIG_IGN); sock_fd = bind_socket(sockname, mode, uid, gid); FD_ZERO(&devfds); FD_SET(ctl_fd, &devfds); FD_SET(sock_fd, &devfds); for (selcopy = devfds, errno = 0, stv = tv; (ready = select(MAX(ctl_fd,sock_fd)+1, &selcopy, 0, 0, &stv)) >= 0 || errno == EINTR; selcopy = devfds, errno = 0, stv = tv) { if (errno == EINTR) continue; if (ready == 0) { int status; /* wakeup for timeout: take status */ status = power_status(ctl_fd, 0, 0); if (lowbattsleep && status&POWER_STATUS_LOWBATTNOW) { if (noacsleep && status&POWER_STATUS_ACON) { if (debug) syslog(LOG_DEBUG, "not sleeping because " "AC is connected"); } else suspend(ctl_fd); } } if (FD_ISSET(ctl_fd, &selcopy)) { suspends = standbys = resumes = 0; while (ioctl(ctl_fd, APM_IOC_NEXTEVENT, &apmevent) == 0) { if (debug) syslog(LOG_DEBUG, "apmevent %04x index %d", apmevent.type, apmevent.index); switch (apmevent.type) { case APM_SUSPEND_REQ: case APM_USER_SUSPEND_REQ: case APM_CRIT_SUSPEND_REQ: suspends++; break; case APM_BATTERY_LOW: if (lowbattsleep) suspends++; break; case APM_USER_STANDBY_REQ: case APM_STANDBY_REQ: standbys++; break; #if 0 case APM_CANCEL: suspends = standbys = 0; break; #endif case APM_NORMAL_RESUME: case APM_CRIT_RESUME: case APM_SYS_STANDBY_RESUME: resumes++; break; case APM_POWER_CHANGE: { struct apm_power_info pinfo; power_status(ctl_fd, 0, &pinfo); /* power status can change without ac status changing */ if (ac_is_off != (pinfo.ac_state == APM_AC_OFF)) { do_ac_state(pinfo.ac_state); ac_is_off = (pinfo.ac_state == APM_AC_OFF); } break; } default: break; } } if ((standbys || suspends) && noacsleep && (power_status(ctl_fd, 0, 0) & POWER_STATUS_ACON)) { if (debug) syslog(LOG_DEBUG, "not sleeping because AC is connected"); } else if (suspends) { suspend(ctl_fd); } else if (standbys) { stand_by(ctl_fd); } else if (resumes) { resume(ctl_fd); if (verbose) syslog(LOG_NOTICE, "system resumed from APM sleep"); } ready--; } if (ready == 0) continue; if (FD_ISSET(sock_fd, &selcopy)) { switch (handle_client(sock_fd, ctl_fd)) { case NORMAL: break; case SUSPENDING: suspend(ctl_fd); break; case STANDING_BY: stand_by(ctl_fd); break; } } } syslog(LOG_ERR, "select failed: %m"); exit(1); } void do_etc_file(const char *file) { pid_t pid; int status; const char *prog; /* If file doesn't exist, do nothing. */ if (access(file, X_OK|R_OK)) { if (debug) syslog(LOG_DEBUG, "do_etc_file(): cannot access file %s", file); return; } prog = strrchr(file, '/'); if (prog) prog++; else prog = file; pid = fork(); switch (pid) { case -1: syslog(LOG_ERR, "failed to fork(): %m"); return; case 0: /* We are the child. */ execl(file, prog, NULL); _exit(1); /* NOTREACHED */ default: /* We are the parent. */ wait4(pid, &status, 0, 0); if (WIFEXITED(status)) { if (debug) syslog(LOG_DEBUG, "%s exited with status %d", file, WEXITSTATUS(status)); } else syslog(LOG_ERR, "%s exited abnormally.", file); break; } } void do_ac_state(int state) { switch (state) { case APM_AC_OFF: do_etc_file(_PATH_APM_ETC_BATTERY); break; case APM_AC_ON: case APM_AC_BACKUP: do_etc_file(_PATH_APM_ETC_LINE); break; default: /* Silently ignore */ ; } }