/* this may be a frequent stumbling point for new users, so be verbose here */ static void sock_fail(const char *fn) { int sockerr; struct passwd *user; /* save this so it doesn't get overwritten */ sockerr = errno; /* dispense with the usual upslog stuff since we have stderr here */ printf("\nFatal error: unable to create listener socket\n\n"); printf("bind %s failed: %s\n", fn, strerror(sockerr)); user = getpwuid(getuid()); if (!user) { fatal_with_errno(EXIT_FAILURE, "getpwuid"); } /* deal with some common problems */ switch (errno) { case EACCES: printf("\nCurrent user: %s (UID %d)\n\n", user->pw_name, (int)user->pw_uid); printf("Things to try:\n\n"); printf(" - set different owners or permissions on %s\n\n", dflt_statepath()); printf(" - run this as some other user " "(try -u <username>)\n"); break; case ENOENT: printf("\nThings to try:\n\n"); printf(" - mkdir %s\n", dflt_statepath()); break; case ENOTDIR: printf("\nThings to try:\n\n"); printf(" - rm %s\n\n", dflt_statepath()); printf(" - mkdir %s\n", dflt_statepath()); break; } /* * there - that wasn't so bad. every helpful line of code here * prevents one more "help me" mail to the list a year from now */ printf("\n"); fatalx(EXIT_FAILURE, "Exiting."); }
/* Return the alternate path for pid files */ const char * altpidpath(void) { #ifdef ALTPIDPATH return ALTPIDPATH; #else return dflt_statepath(); #endif }
void dstate_init(const char *prog, const char *devname) { char sockname[SMALLBUF]; /* do this here for now */ signal(SIGPIPE, SIG_IGN); if (devname) { snprintf(sockname, sizeof(sockname), "%s/%s-%s", dflt_statepath(), prog, devname); } else { snprintf(sockname, sizeof(sockname), "%s/%s", dflt_statepath(), prog); } sockfd = sock_open(sockname); upsdebugx(2, "dstate_init: sock %s open on fd %d", sockname, sockfd); }
static int sstate_connect(void) { int ret, fd; const char *dumpcmd = "DUMPALL\n"; struct sockaddr_un sa; memset(&sa, '\0', sizeof(sa)); sa.sun_family = AF_UNIX; snprintf(sa.sun_path, sizeof(sa.sun_path), "%s/%s", dflt_statepath(), device_path); fd = socket(AF_UNIX, SOCK_STREAM, 0); if (fd < 0) { upslog_with_errno(LOG_ERR, "Can't create socket for UPS [%s]", device_path); return -1; } ret = connect(fd, (struct sockaddr *) &sa, sizeof(sa)); if (ret < 0) { time_t now; close(fd); /* rate-limit complaints - don't spam the syslog */ time(&now); if (difftime(now, last_connfail) < 60) { return -1; } last_connfail = now; upslog_with_errno(LOG_ERR, "Can't connect to UPS [%s]", device_path); return -1; } ret = fcntl(fd, F_GETFL, 0); if (ret < 0) { upslog_with_errno(LOG_ERR, "fcntl get on UPS [%s] failed", device_path); close(fd); return -1; } ret = fcntl(fd, F_SETFL, ret | O_NDELAY); if (ret < 0) { upslog_with_errno(LOG_ERR, "fcntl set O_NDELAY on UPS [%s] failed", device_path); close(fd); return -1; } /* get a dump started so we have a fresh set of data */ ret = write(fd, dumpcmd, strlen(dumpcmd)); if (ret != (int)strlen(dumpcmd)) { upslog_with_errno(LOG_ERR, "Initial write to UPS [%s] failed", device_path); close(fd); return -1; } pconf_init(&sock_ctx, NULL); time(&last_heard); dumpdone = 0; /* set ups.status to "WAIT" while waiting for the driver response to dumpcmd */ dstate_setinfo("ups.status", "WAIT"); upslogx(LOG_INFO, "Connected to UPS [%s]", device_path); return fd; }