Index: head/usr.sbin/syslogd/syslogd.c =================================================================== --- head/usr.sbin/syslogd/syslogd.c (revision 294923) +++ head/usr.sbin/syslogd/syslogd.c (revision 294924) @@ -1,2851 +1,2851 @@ /* * Copyright (c) 1983, 1988, 1993, 1994 * The Regents of the University of California. All rights reserved. * * 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. * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1983, 1988, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94"; #endif #endif /* not lint */ #include __FBSDID("$FreeBSD$"); /* * syslogd -- log system messages * * This program implements a system log. It takes a series of lines. * Each line may have a priority, signified as "" as * the first characters of the line. If this is * not present, a default priority is used. * * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will * cause it to reread its configuration file. * * Defined Constants: * * MAXLINE -- the maximum line length that can be handled. * DEFUPRI -- the default priority for user messages * DEFSPRI -- the default priority for kernel messages * * Author: Eric Allman * extensive changes by Ralph Campbell * more extensive changes by Eric Allman (again) * Extension to log by program name as well as facility and priority * by Peter da Silva. * -u and -v by Harlan Stenn. * Priority comparison code by Harlan Stenn. */ #define MAXLINE 1024 /* maximum line length */ -#define MAXSVLINE 120 /* maximum saved line length */ +#define MAXSVLINE MAXLINE /* maximum saved line length */ #define DEFUPRI (LOG_USER|LOG_NOTICE) #define DEFSPRI (LOG_KERN|LOG_CRIT) #define TIMERINTVL 30 /* interval for checking flush, mark */ #define TTYMSGTIME 1 /* timeout passed to ttymsg */ #define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pathnames.h" #include "ttymsg.h" #define SYSLOG_NAMES #include const char *ConfFile = _PATH_LOGCONF; const char *PidFile = _PATH_LOGPID; const char ctty[] = _PATH_CONSOLE; #define dprintf if (Debug) printf #define MAXUNAMES 20 /* maximum number of user names */ /* * List of hosts for binding. */ static STAILQ_HEAD(, host) hqueue; struct host { char *name; STAILQ_ENTRY(host) next; }; /* * Unix sockets. * We have two default sockets, one with 666 permissions, * and one for privileged programs. */ struct funix { int s; const char *name; mode_t mode; STAILQ_ENTRY(funix) next; }; struct funix funix_secure = { -1, _PATH_LOG_PRIV, S_IRUSR | S_IWUSR, { NULL } }; struct funix funix_default = { -1, _PATH_LOG, DEFFILEMODE, { &funix_secure } }; STAILQ_HEAD(, funix) funixes = { &funix_default, &(funix_secure.next.stqe_next) }; /* * Flags to logmsg(). */ #define IGN_CONS 0x001 /* don't print on console */ #define SYNC_FILE 0x002 /* do fsync on file after printing */ #define ADDDATE 0x004 /* add a date to the message */ #define MARK 0x008 /* this message is a mark */ #define ISKERNEL 0x010 /* kernel generated message */ /* * This structure represents the files that will have log * copies printed. * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY * or if f_type if F_PIPE and f_pid > 0. */ struct filed { struct filed *f_next; /* next in linked list */ short f_type; /* entry type, see below */ short f_file; /* file descriptor */ time_t f_time; /* time this was last written */ char *f_host; /* host from which to recd. */ u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */ u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */ #define PRI_LT 0x1 #define PRI_EQ 0x2 #define PRI_GT 0x4 char *f_program; /* program this applies to */ union { char f_uname[MAXUNAMES][MAXLOGNAME]; struct { char f_hname[MAXHOSTNAMELEN]; struct addrinfo *f_addr; } f_forw; /* forwarding address */ char f_fname[MAXPATHLEN]; struct { char f_pname[MAXPATHLEN]; pid_t f_pid; } f_pipe; } f_un; char f_prevline[MAXSVLINE]; /* last message logged */ char f_lasttime[16]; /* time of last occurrence */ char f_prevhost[MAXHOSTNAMELEN]; /* host from which recd. */ int f_prevpri; /* pri of f_prevline */ int f_prevlen; /* length of f_prevline */ int f_prevcount; /* repetition cnt of prevline */ u_int f_repeatcount; /* number of "repeated" msgs */ int f_flags; /* file-specific flags */ #define FFLAG_SYNC 0x01 #define FFLAG_NEEDSYNC 0x02 }; /* * Queue of about-to-be dead processes we should watch out for. */ TAILQ_HEAD(stailhead, deadq_entry) deadq_head; struct stailhead *deadq_headp; struct deadq_entry { pid_t dq_pid; int dq_timeout; TAILQ_ENTRY(deadq_entry) dq_entries; }; /* * The timeout to apply to processes waiting on the dead queue. Unit * of measure is `mark intervals', i.e. 20 minutes by default. * Processes on the dead queue will be terminated after that time. */ #define DQ_TIMO_INIT 2 typedef struct deadq_entry *dq_t; /* * Struct to hold records of network addresses that are allowed to log * to us. */ struct allowedpeer { int isnumeric; u_short port; union { struct { struct sockaddr_storage addr; struct sockaddr_storage mask; } numeric; char *name; } u; #define a_addr u.numeric.addr #define a_mask u.numeric.mask #define a_name u.name }; /* * Intervals at which we flush out "message repeated" messages, * in seconds after previous message is logged. After each flush, * we move to the next interval until we reach the largest. */ int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \ (f)->f_repeatcount = MAXREPEAT; \ } /* values for f_type */ #define F_UNUSED 0 /* unused entry */ #define F_FILE 1 /* regular file */ #define F_TTY 2 /* terminal */ #define F_CONSOLE 3 /* console terminal */ #define F_FORW 4 /* remote machine */ #define F_USERS 5 /* list of users */ #define F_WALL 6 /* everyone logged on */ #define F_PIPE 7 /* pipe to program */ const char *TypeNames[8] = { "UNUSED", "FILE", "TTY", "CONSOLE", "FORW", "USERS", "WALL", "PIPE" }; static struct filed *Files; /* Log files that we write to */ static struct filed consfile; /* Console */ static int Debug; /* debug flag */ static int Foreground = 0; /* Run in foreground, instead of daemonizing */ static int resolve = 1; /* resolve hostname */ static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */ static const char *LocalDomain; /* our local domain name */ static int *finet; /* Internet datagram sockets */ static int fklog = -1; /* /dev/klog */ static int Initialized; /* set when we have initialized ourselves */ static int MarkInterval = 20 * 60; /* interval between marks in seconds */ static int MarkSeq; /* mark sequence number */ static int NoBind; /* don't bind() as suggested by RFC 3164 */ static int SecureMode; /* when true, receive only unix domain socks */ #ifdef INET6 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ #else static int family = PF_INET; /* protocol family (IPv4 only) */ #endif static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */ static int send_to_all; /* send message to all IPv4/IPv6 addresses */ static int use_bootfile; /* log entire bootfile for every kern msg */ static int no_compress; /* don't compress messages (1=pipes, 2=all) */ static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */ static char bootfile[MAXLINE+1]; /* booted kernel file */ struct allowedpeer *AllowedPeers; /* List of allowed peers */ static int NumAllowed; /* Number of entries in AllowedPeers */ static int RemoteAddDate; /* Always set the date on remote messages */ static int UniquePriority; /* Only log specified priority? */ static int LogFacPri; /* Put facility and priority in log message: */ /* 0=no, 1=numeric, 2=names */ static int KeepKernFac; /* Keep remotely logged kernel facility */ static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */ static struct pidfh *pfh; volatile sig_atomic_t MarkSet, WantDie; static int allowaddr(char *); static void cfline(const char *, struct filed *, const char *, const char *); static const char *cvthname(struct sockaddr *); static void deadq_enter(pid_t, const char *); static int deadq_remove(pid_t); static int decode(const char *, const CODE *); static void die(int) __dead2; static void dodie(int); static void dofsync(void); static void domark(int); static void fprintlog(struct filed *, int, const char *); static int *socksetup(int, char *); static void init(int); static void logerror(const char *); static void logmsg(int, const char *, const char *, int); static void log_deadchild(pid_t, int, const char *); static void markit(void); static int skip_message(const char *, const char *, int); static void printline(const char *, char *, int); static void printsys(char *); static int p_open(const char *, pid_t *); static void readklog(void); static void reapchild(int); static const char *ttymsg_check(struct iovec *, int, char *, int); static void usage(void); static int validate(struct sockaddr *, const char *); static void unmapped(struct sockaddr *); static void wallmsg(struct filed *, struct iovec *, const int iovlen); static int waitdaemon(int, int, int); static void timedout(int); static void increase_rcvbuf(int); static void close_filed(struct filed *f) { if (f == NULL || f->f_file == -1) return; (void)close(f->f_file); f->f_file = -1; f->f_type = F_UNUSED; } int main(int argc, char *argv[]) { int ch, i, fdsrmax = 0, l; struct sockaddr_un sunx, fromunix; struct sockaddr_storage frominet; fd_set *fdsr = NULL; char line[MAXLINE + 1]; const char *hname; struct timeval tv, *tvp; struct sigaction sact; struct host *host; struct funix *fx, *fx1; sigset_t mask; pid_t ppid = 1, spid; socklen_t len; if (madvise(NULL, 0, MADV_PROTECT) != 0) dprintf("madvise() failed: %s\n", strerror(errno)); STAILQ_INIT(&hqueue); while ((ch = getopt(argc, argv, "468Aa:b:cCdf:Fkl:m:nNop:P:sS:Tuv")) != -1) switch (ch) { case '4': family = PF_INET; break; #ifdef INET6 case '6': family = PF_INET6; break; #endif case '8': mask_C1 = 0; break; case 'A': send_to_all++; break; case 'a': /* allow specific network addresses only */ if (allowaddr(optarg) == -1) usage(); break; case 'b': { if ((host = malloc(sizeof(struct host))) == NULL) err(1, "malloc failed"); host->name = optarg; STAILQ_INSERT_TAIL(&hqueue, host, next); break; } case 'c': no_compress++; break; case 'C': logflags |= O_CREAT; break; case 'd': /* debug */ Debug++; break; case 'f': /* configuration file */ ConfFile = optarg; break; case 'F': /* run in foreground instead of daemon */ Foreground++; break; case 'k': /* keep remote kern fac */ KeepKernFac = 1; break; case 'l': { long perml; mode_t mode; char *name, *ep; if (optarg[0] == '/') { mode = DEFFILEMODE; name = optarg; } else if ((name = strchr(optarg, ':')) != NULL) { *name++ = '\0'; if (name[0] != '/') errx(1, "socket name must be absolute " "path"); if (isdigit(*optarg)) { perml = strtol(optarg, &ep, 8); if (*ep || perml < 0 || perml & ~(S_IRWXU|S_IRWXG|S_IRWXO)) errx(1, "invalid mode %s, exiting", optarg); mode = (mode_t )perml; } else errx(1, "invalid mode %s, exiting", optarg); } else /* doesn't begin with '/', and no ':' */ errx(1, "can't parse path %s", optarg); if (strlen(name) >= sizeof(sunx.sun_path)) errx(1, "%s path too long, exiting", name); if ((fx = malloc(sizeof(struct funix))) == NULL) err(1, "malloc failed"); fx->s = -1; fx->name = name; fx->mode = mode; STAILQ_INSERT_TAIL(&funixes, fx, next); break; } case 'm': /* mark interval */ MarkInterval = atoi(optarg) * 60; break; case 'N': NoBind = 1; SecureMode = 1; break; case 'n': resolve = 0; break; case 'o': use_bootfile = 1; break; case 'p': /* path */ if (strlen(optarg) >= sizeof(sunx.sun_path)) errx(1, "%s path too long, exiting", optarg); funix_default.name = optarg; break; case 'P': /* path for alt. PID */ PidFile = optarg; break; case 's': /* no network mode */ SecureMode++; break; case 'S': /* path for privileged originator */ if (strlen(optarg) >= sizeof(sunx.sun_path)) errx(1, "%s path too long, exiting", optarg); funix_secure.name = optarg; break; case 'T': RemoteAddDate = 1; break; case 'u': /* only log specified priority */ UniquePriority++; break; case 'v': /* log facility and priority */ LogFacPri++; break; default: usage(); } if ((argc -= optind) != 0) usage(); pfh = pidfile_open(PidFile, 0600, &spid); if (pfh == NULL) { if (errno == EEXIST) errx(1, "syslogd already running, pid: %d", spid); warn("cannot open pid file"); } if ((!Foreground) && (!Debug)) { ppid = waitdaemon(0, 0, 30); if (ppid < 0) { warn("could not become daemon"); pidfile_remove(pfh); exit(1); } } else if (Debug) { setlinebuf(stdout); } if (NumAllowed) endservent(); consfile.f_type = F_CONSOLE; (void)strlcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1, sizeof(consfile.f_un.f_fname)); (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile)); (void)signal(SIGTERM, dodie); (void)signal(SIGINT, Debug ? dodie : SIG_IGN); (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN); /* * We don't want the SIGCHLD and SIGHUP handlers to interfere * with each other; they are likely candidates for being called * simultaneously (SIGHUP closes pipe descriptor, process dies, * SIGCHLD happens). */ sigemptyset(&mask); sigaddset(&mask, SIGHUP); sact.sa_handler = reapchild; sact.sa_mask = mask; sact.sa_flags = SA_RESTART; (void)sigaction(SIGCHLD, &sact, NULL); (void)signal(SIGALRM, domark); (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */ (void)alarm(TIMERINTVL); TAILQ_INIT(&deadq_head); #ifndef SUN_LEN #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) #endif STAILQ_FOREACH_SAFE(fx, &funixes, next, fx1) { (void)unlink(fx->name); memset(&sunx, 0, sizeof(sunx)); sunx.sun_family = AF_LOCAL; (void)strlcpy(sunx.sun_path, fx->name, sizeof(sunx.sun_path)); fx->s = socket(PF_LOCAL, SOCK_DGRAM, 0); if (fx->s < 0 || bind(fx->s, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 || chmod(fx->name, fx->mode) < 0) { (void)snprintf(line, sizeof line, "cannot create %s", fx->name); logerror(line); dprintf("cannot create %s (%d)\n", fx->name, errno); if (fx == &funix_default || fx == &funix_secure) die(0); else { STAILQ_REMOVE(&funixes, fx, funix, next); continue; } } increase_rcvbuf(fx->s); } if (SecureMode <= 1) { if (STAILQ_EMPTY(&hqueue)) finet = socksetup(family, NULL); STAILQ_FOREACH(host, &hqueue, next) { int *finet0, total; finet0 = socksetup(family, host->name); if (finet0 && !finet) { finet = finet0; } else if (finet0 && finet) { total = *finet0 + *finet + 1; finet = realloc(finet, total * sizeof(int)); if (finet == NULL) err(1, "realloc failed"); for (i = 1; i <= *finet0; i++) { finet[(*finet)+i] = finet0[i]; } *finet = total - 1; free(finet0); } } } if (finet) { if (SecureMode) { for (i = 0; i < *finet; i++) { if (shutdown(finet[i+1], SHUT_RD) < 0 && errno != ENOTCONN) { logerror("shutdown"); if (!Debug) die(0); } } } else { dprintf("listening on inet and/or inet6 socket\n"); } dprintf("sending on inet and/or inet6 socket\n"); } if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0) if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0) fklog = -1; if (fklog < 0) dprintf("can't open %s (%d)\n", _PATH_KLOG, errno); /* tuck my process id away */ pidfile_write(pfh); dprintf("off & running....\n"); init(0); /* prevent SIGHUP and SIGCHLD handlers from running in parallel */ sigemptyset(&mask); sigaddset(&mask, SIGCHLD); sact.sa_handler = init; sact.sa_mask = mask; sact.sa_flags = SA_RESTART; (void)sigaction(SIGHUP, &sact, NULL); tvp = &tv; tv.tv_sec = tv.tv_usec = 0; if (fklog != -1 && fklog > fdsrmax) fdsrmax = fklog; if (finet && !SecureMode) { for (i = 0; i < *finet; i++) { if (finet[i+1] != -1 && finet[i+1] > fdsrmax) fdsrmax = finet[i+1]; } } STAILQ_FOREACH(fx, &funixes, next) if (fx->s > fdsrmax) fdsrmax = fx->s; fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS), sizeof(fd_mask)); if (fdsr == NULL) errx(1, "calloc fd_set"); for (;;) { if (MarkSet) markit(); if (WantDie) die(WantDie); bzero(fdsr, howmany(fdsrmax+1, NFDBITS) * sizeof(fd_mask)); if (fklog != -1) FD_SET(fklog, fdsr); if (finet && !SecureMode) { for (i = 0; i < *finet; i++) { if (finet[i+1] != -1) FD_SET(finet[i+1], fdsr); } } STAILQ_FOREACH(fx, &funixes, next) FD_SET(fx->s, fdsr); i = select(fdsrmax+1, fdsr, NULL, NULL, needdofsync ? &tv : tvp); switch (i) { case 0: dofsync(); needdofsync = 0; if (tvp) { tvp = NULL; if (ppid != 1) kill(ppid, SIGALRM); } continue; case -1: if (errno != EINTR) logerror("select"); continue; } if (fklog != -1 && FD_ISSET(fklog, fdsr)) readklog(); if (finet && !SecureMode) { for (i = 0; i < *finet; i++) { if (FD_ISSET(finet[i+1], fdsr)) { len = sizeof(frominet); l = recvfrom(finet[i+1], line, MAXLINE, 0, (struct sockaddr *)&frominet, &len); if (l > 0) { line[l] = '\0'; hname = cvthname((struct sockaddr *)&frominet); unmapped((struct sockaddr *)&frominet); if (validate((struct sockaddr *)&frominet, hname)) printline(hname, line, RemoteAddDate ? ADDDATE : 0); } else if (l < 0 && errno != EINTR) logerror("recvfrom inet"); } } } STAILQ_FOREACH(fx, &funixes, next) { if (FD_ISSET(fx->s, fdsr)) { len = sizeof(fromunix); l = recvfrom(fx->s, line, MAXLINE, 0, (struct sockaddr *)&fromunix, &len); if (l > 0) { line[l] = '\0'; printline(LocalHostName, line, 0); } else if (l < 0 && errno != EINTR) logerror("recvfrom unix"); } } } if (fdsr) free(fdsr); } static void unmapped(struct sockaddr *sa) { struct sockaddr_in6 *sin6; struct sockaddr_in sin4; if (sa->sa_family != AF_INET6) return; if (sa->sa_len != sizeof(struct sockaddr_in6) || sizeof(sin4) > sa->sa_len) return; sin6 = (struct sockaddr_in6 *)sa; if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) return; memset(&sin4, 0, sizeof(sin4)); sin4.sin_family = AF_INET; sin4.sin_len = sizeof(struct sockaddr_in); memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12], sizeof(sin4.sin_addr)); sin4.sin_port = sin6->sin6_port; memcpy(sa, &sin4, sin4.sin_len); } static void usage(void) { fprintf(stderr, "%s\n%s\n%s\n%s\n", "usage: syslogd [-468ACcdFknosTuv] [-a allowed_peer]", " [-b bind_address] [-f config_file]", " [-l [mode:]path] [-m mark_interval]", " [-P pid_file] [-p log_socket]"); exit(1); } /* * Take a raw input line, decode the message, and print the message * on the appropriate log files. */ static void printline(const char *hname, char *msg, int flags) { char *p, *q; long n; int c, pri; char line[MAXLINE + 1]; /* test for special codes */ p = msg; pri = DEFUPRI; if (*p == '<') { errno = 0; n = strtol(p + 1, &q, 10); if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { p = q + 1; pri = n; } } if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) pri = DEFUPRI; /* * Don't allow users to log kernel messages. * NOTE: since LOG_KERN == 0 this will also match * messages with no facility specified. */ if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac) pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); q = line; while ((c = (unsigned char)*p++) != '\0' && q < &line[sizeof(line) - 4]) { if (mask_C1 && (c & 0x80) && c < 0xA0) { c &= 0x7F; *q++ = 'M'; *q++ = '-'; } if (isascii(c) && iscntrl(c)) { if (c == '\n') { *q++ = ' '; } else if (c == '\t') { *q++ = '\t'; } else { *q++ = '^'; *q++ = c ^ 0100; } } else { *q++ = c; } } *q = '\0'; logmsg(pri, line, hname, flags); } /* * Read /dev/klog while data are available, split into lines. */ static void readklog(void) { char *p, *q, line[MAXLINE + 1]; int len, i; len = 0; for (;;) { i = read(fklog, line + len, MAXLINE - 1 - len); if (i > 0) { line[i + len] = '\0'; } else { if (i < 0 && errno != EINTR && errno != EAGAIN) { logerror("klog"); fklog = -1; } break; } for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) { *q = '\0'; printsys(p); } len = strlen(p); if (len >= MAXLINE - 1) { printsys(p); len = 0; } if (len > 0) memmove(line, p, len + 1); } if (len > 0) printsys(line); } /* * Take a raw input line from /dev/klog, format similar to syslog(). */ static void printsys(char *msg) { char *p, *q; long n; int flags, isprintf, pri; flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */ p = msg; pri = DEFSPRI; isprintf = 1; if (*p == '<') { errno = 0; n = strtol(p + 1, &q, 10); if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { p = q + 1; pri = n; isprintf = 0; } } /* * Kernel printf's and LOG_CONSOLE messages have been displayed * on the console already. */ if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE) flags |= IGN_CONS; if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) pri = DEFSPRI; logmsg(pri, p, LocalHostName, flags); } static time_t now; /* * Match a program or host name against a specification. * Return a non-0 value if the message must be ignored * based on the specification. */ static int skip_message(const char *name, const char *spec, int checkcase) { const char *s; char prev, next; int exclude = 0; /* Behaviour on explicit match */ if (spec == NULL) return 0; switch (*spec) { case '-': exclude = 1; /*FALLTHROUGH*/ case '+': spec++; break; default: break; } if (checkcase) s = strstr (spec, name); else s = strcasestr (spec, name); if (s != NULL) { prev = (s == spec ? ',' : *(s - 1)); next = *(s + strlen (name)); if (prev == ',' && (next == '\0' || next == ',')) /* Explicit match: skip iff the spec is an exclusive one. */ return exclude; } /* No explicit match for this name: skip the message iff the spec is an inclusive one. */ return !exclude; } /* * Log a message to the appropriate log files, users, etc. based on * the priority. */ static void logmsg(int pri, const char *msg, const char *from, int flags) { struct filed *f; int i, fac, msglen, omask, prilev; const char *timestamp; char prog[NAME_MAX+1]; char buf[MAXLINE+1]; dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", pri, flags, from, msg); omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); /* * Check to see if msg looks non-standard. */ msglen = strlen(msg); if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' || msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') flags |= ADDDATE; (void)time(&now); if (flags & ADDDATE) { timestamp = ctime(&now) + 4; } else { timestamp = msg; msg += 16; msglen -= 16; } /* skip leading blanks */ while (isspace(*msg)) { msg++; msglen--; } /* extract facility and priority level */ if (flags & MARK) fac = LOG_NFACILITIES; else fac = LOG_FAC(pri); /* Check maximum facility number. */ if (fac > LOG_NFACILITIES) { (void)sigsetmask(omask); return; } prilev = LOG_PRI(pri); /* extract program name */ for (i = 0; i < NAME_MAX; i++) { if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' || msg[i] == '/' || isspace(msg[i])) break; prog[i] = msg[i]; } prog[i] = 0; /* add kernel prefix for kernel messages */ if (flags & ISKERNEL) { snprintf(buf, sizeof(buf), "%s: %s", use_bootfile ? bootfile : "kernel", msg); msg = buf; msglen = strlen(buf); } /* log the message to the particular outputs */ if (!Initialized) { f = &consfile; /* * Open in non-blocking mode to avoid hangs during open * and close(waiting for the port to drain). */ f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0); if (f->f_file >= 0) { (void)strlcpy(f->f_lasttime, timestamp, sizeof(f->f_lasttime)); fprintlog(f, flags, msg); close(f->f_file); f->f_file = -1; } (void)sigsetmask(omask); return; } for (f = Files; f; f = f->f_next) { /* skip messages that are incorrect priority */ if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev)) ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev)) ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev)) ) || f->f_pmask[fac] == INTERNAL_NOPRI) continue; /* skip messages with the incorrect hostname */ if (skip_message(from, f->f_host, 0)) continue; /* skip messages with the incorrect program name */ if (skip_message(prog, f->f_program, 1)) continue; /* skip message to console if it has already been printed */ if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) continue; /* don't output marks to recently written files */ if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2) continue; /* * suppress duplicate lines to this file */ if (no_compress - (f->f_type != F_PIPE) < 1 && (flags & MARK) == 0 && msglen == f->f_prevlen && !strcmp(msg, f->f_prevline) && !strcasecmp(from, f->f_prevhost)) { (void)strlcpy(f->f_lasttime, timestamp, sizeof(f->f_lasttime)); f->f_prevcount++; dprintf("msg repeated %d times, %ld sec of %d\n", f->f_prevcount, (long)(now - f->f_time), repeatinterval[f->f_repeatcount]); /* * If domark would have logged this by now, * flush it now (so we don't hold isolated messages), * but back off so we'll flush less often * in the future. */ if (now > REPEATTIME(f)) { fprintlog(f, flags, (char *)NULL); BACKOFF(f); } } else { /* new line, save it */ if (f->f_prevcount) fprintlog(f, 0, (char *)NULL); f->f_repeatcount = 0; f->f_prevpri = pri; (void)strlcpy(f->f_lasttime, timestamp, sizeof(f->f_lasttime)); (void)strlcpy(f->f_prevhost, from, sizeof(f->f_prevhost)); if (msglen < MAXSVLINE) { f->f_prevlen = msglen; (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline)); fprintlog(f, flags, (char *)NULL); } else { f->f_prevline[0] = 0; f->f_prevlen = 0; fprintlog(f, flags, msg); } } } (void)sigsetmask(omask); } static void dofsync(void) { struct filed *f; for (f = Files; f; f = f->f_next) { if ((f->f_type == F_FILE) && (f->f_flags & FFLAG_NEEDSYNC)) { f->f_flags &= ~FFLAG_NEEDSYNC; (void)fsync(f->f_file); } } } #define IOV_SIZE 7 static void fprintlog(struct filed *f, int flags, const char *msg) { struct iovec iov[IOV_SIZE]; struct iovec *v; struct addrinfo *r; int i, l, lsent = 0; char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL; char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n"; const char *msgret; v = iov; if (f->f_type == F_WALL) { v->iov_base = greetings; /* The time displayed is not synchornized with the other log * destinations (like messages). Following fragment was using * ctime(&now), which was updating the time every 30 sec. * With f_lasttime, time is synchronized correctly. */ v->iov_len = snprintf(greetings, sizeof greetings, "\r\n\7Message from syslogd@%s at %.24s ...\r\n", f->f_prevhost, f->f_lasttime); if (v->iov_len >= sizeof greetings) v->iov_len = sizeof greetings - 1; v++; v->iov_base = nul; v->iov_len = 0; v++; } else { v->iov_base = f->f_lasttime; v->iov_len = strlen(f->f_lasttime); v++; v->iov_base = space; v->iov_len = 1; v++; } if (LogFacPri) { static char fp_buf[30]; /* Hollow laugh */ int fac = f->f_prevpri & LOG_FACMASK; int pri = LOG_PRI(f->f_prevpri); const char *f_s = NULL; char f_n[5]; /* Hollow laugh */ const char *p_s = NULL; char p_n[5]; /* Hollow laugh */ if (LogFacPri > 1) { const CODE *c; for (c = facilitynames; c->c_name; c++) { if (c->c_val == fac) { f_s = c->c_name; break; } } for (c = prioritynames; c->c_name; c++) { if (c->c_val == pri) { p_s = c->c_name; break; } } } if (!f_s) { snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac)); f_s = f_n; } if (!p_s) { snprintf(p_n, sizeof p_n, "%d", pri); p_s = p_n; } snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s); v->iov_base = fp_buf; v->iov_len = strlen(fp_buf); } else { v->iov_base = nul; v->iov_len = 0; } v++; v->iov_base = f->f_prevhost; v->iov_len = strlen(v->iov_base); v++; v->iov_base = space; v->iov_len = 1; v++; if (msg) { wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */ if (wmsg == NULL) { logerror("strdup"); exit(1); } v->iov_base = wmsg; v->iov_len = strlen(msg); } else if (f->f_prevcount > 1) { v->iov_base = repbuf; v->iov_len = snprintf(repbuf, sizeof repbuf, "last message repeated %d times", f->f_prevcount); } else { v->iov_base = f->f_prevline; v->iov_len = f->f_prevlen; } v++; dprintf("Logging to %s", TypeNames[f->f_type]); f->f_time = now; switch (f->f_type) { int port; case F_UNUSED: dprintf("\n"); break; case F_FORW: port = (int)ntohs(((struct sockaddr_in *) (f->f_un.f_forw.f_addr->ai_addr))->sin_port); if (port != 514) { dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port); } else { dprintf(" %s\n", f->f_un.f_forw.f_hname); } /* check for local vs remote messages */ if (strcasecmp(f->f_prevhost, LocalHostName)) l = snprintf(line, sizeof line - 1, "<%d>%.15s Forwarded from %s: %s", f->f_prevpri, (char *)iov[0].iov_base, f->f_prevhost, (char *)iov[5].iov_base); else l = snprintf(line, sizeof line - 1, "<%d>%.15s %s", f->f_prevpri, (char *)iov[0].iov_base, (char *)iov[5].iov_base); if (l < 0) l = 0; else if (l > MAXLINE) l = MAXLINE; if (finet) { for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) { for (i = 0; i < *finet; i++) { #if 0 /* * should we check AF first, or just * trial and error? FWD */ if (r->ai_family == address_family_of(finet[i+1])) #endif lsent = sendto(finet[i+1], line, l, 0, r->ai_addr, r->ai_addrlen); if (lsent == l) break; } if (lsent == l && !send_to_all) break; } dprintf("lsent/l: %d/%d\n", lsent, l); if (lsent != l) { int e = errno; logerror("sendto"); errno = e; switch (errno) { case ENOBUFS: case ENETDOWN: case ENETUNREACH: case EHOSTUNREACH: case EHOSTDOWN: case EADDRNOTAVAIL: break; /* case EBADF: */ /* case EACCES: */ /* case ENOTSOCK: */ /* case EFAULT: */ /* case EMSGSIZE: */ /* case EAGAIN: */ /* case ENOBUFS: */ /* case ECONNREFUSED: */ default: dprintf("removing entry: errno=%d\n", e); f->f_type = F_UNUSED; break; } } } break; case F_FILE: dprintf(" %s\n", f->f_un.f_fname); v->iov_base = lf; v->iov_len = 1; if (writev(f->f_file, iov, IOV_SIZE) < 0) { /* * If writev(2) fails for potentially transient errors * like the filesystem being full, ignore it. * Otherwise remove this logfile from the list. */ if (errno != ENOSPC) { int e = errno; close_filed(f); errno = e; logerror(f->f_un.f_fname); } } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) { f->f_flags |= FFLAG_NEEDSYNC; needdofsync = 1; } break; case F_PIPE: dprintf(" %s\n", f->f_un.f_pipe.f_pname); v->iov_base = lf; v->iov_len = 1; if (f->f_un.f_pipe.f_pid == 0) { if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, &f->f_un.f_pipe.f_pid)) < 0) { f->f_type = F_UNUSED; logerror(f->f_un.f_pipe.f_pname); break; } } if (writev(f->f_file, iov, IOV_SIZE) < 0) { int e = errno; close_filed(f); if (f->f_un.f_pipe.f_pid > 0) deadq_enter(f->f_un.f_pipe.f_pid, f->f_un.f_pipe.f_pname); f->f_un.f_pipe.f_pid = 0; errno = e; logerror(f->f_un.f_pipe.f_pname); } break; case F_CONSOLE: if (flags & IGN_CONS) { dprintf(" (ignored)\n"); break; } /* FALLTHROUGH */ case F_TTY: dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname); v->iov_base = crlf; v->iov_len = 2; errno = 0; /* ttymsg() only sometimes returns an errno */ if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) { f->f_type = F_UNUSED; logerror(msgret); } break; case F_USERS: case F_WALL: dprintf("\n"); v->iov_base = crlf; v->iov_len = 2; wallmsg(f, iov, IOV_SIZE); break; } f->f_prevcount = 0; free(wmsg); } /* * WALLMSG -- Write a message to the world at large * * Write the specified message to either the entire * world, or a list of approved users. */ static void wallmsg(struct filed *f, struct iovec *iov, const int iovlen) { static int reenter; /* avoid calling ourselves */ struct utmpx *ut; int i; const char *p; if (reenter++) return; setutxent(); /* NOSTRICT */ while ((ut = getutxent()) != NULL) { if (ut->ut_type != USER_PROCESS) continue; if (f->f_type == F_WALL) { if ((p = ttymsg(iov, iovlen, ut->ut_line, TTYMSGTIME)) != NULL) { errno = 0; /* already in msg */ logerror(p); } continue; } /* should we send the message to this user? */ for (i = 0; i < MAXUNAMES; i++) { if (!f->f_un.f_uname[i][0]) break; if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) { if ((p = ttymsg_check(iov, iovlen, ut->ut_line, TTYMSGTIME)) != NULL) { errno = 0; /* already in msg */ logerror(p); } break; } } } endutxent(); reenter = 0; } /* * Wrapper routine for ttymsg() that checks the terminal for messages enabled. */ static const char * ttymsg_check(struct iovec *iov, int iovcnt, char *line, int tmout) { static char device[1024]; static char errbuf[1024]; struct stat sb; (void) snprintf(device, sizeof(device), "%s%s", _PATH_DEV, line); if (stat(device, &sb) < 0) { (void) snprintf(errbuf, sizeof(errbuf), "%s: %s", device, strerror(errno)); return (errbuf); } if ((sb.st_mode & S_IWGRP) == 0) /* Messages disabled. */ return (NULL); return ttymsg(iov, iovcnt, line, tmout); } static void reapchild(int signo __unused) { int status; pid_t pid; struct filed *f; while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) { if (!Initialized) /* Don't tell while we are initting. */ continue; /* First, look if it's a process from the dead queue. */ if (deadq_remove(pid)) goto oncemore; /* Now, look in list of active processes. */ for (f = Files; f; f = f->f_next) if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid == pid) { close_filed(f); f->f_un.f_pipe.f_pid = 0; log_deadchild(pid, status, f->f_un.f_pipe.f_pname); break; } oncemore: continue; } } /* * Return a printable representation of a host address. */ static const char * cvthname(struct sockaddr *f) { int error, hl; sigset_t omask, nmask; static char hname[NI_MAXHOST], ip[NI_MAXHOST]; error = getnameinfo((struct sockaddr *)f, ((struct sockaddr *)f)->sa_len, ip, sizeof ip, NULL, 0, NI_NUMERICHOST); dprintf("cvthname(%s)\n", ip); if (error) { dprintf("Malformed from address %s\n", gai_strerror(error)); return ("???"); } if (!resolve) return (ip); sigemptyset(&nmask); sigaddset(&nmask, SIGHUP); sigprocmask(SIG_BLOCK, &nmask, &omask); error = getnameinfo((struct sockaddr *)f, ((struct sockaddr *)f)->sa_len, hname, sizeof hname, NULL, 0, NI_NAMEREQD); sigprocmask(SIG_SETMASK, &omask, NULL); if (error) { dprintf("Host name for your address (%s) unknown\n", ip); return (ip); } hl = strlen(hname); if (hl > 0 && hname[hl-1] == '.') hname[--hl] = '\0'; trimdomain(hname, hl); return (hname); } static void dodie(int signo) { WantDie = signo; } static void domark(int signo __unused) { MarkSet = 1; } /* * Print syslogd errors some place. */ static void logerror(const char *type) { char buf[512]; static int recursed = 0; /* If there's an error while trying to log an error, give up. */ if (recursed) return; recursed++; if (errno) (void)snprintf(buf, sizeof buf, "syslogd: %s: %s", type, strerror(errno)); else (void)snprintf(buf, sizeof buf, "syslogd: %s", type); errno = 0; dprintf("%s\n", buf); logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE); recursed--; } static void die(int signo) { struct filed *f; struct funix *fx; int was_initialized; char buf[100]; was_initialized = Initialized; Initialized = 0; /* Don't log SIGCHLDs. */ for (f = Files; f != NULL; f = f->f_next) { /* flush any pending output */ if (f->f_prevcount) fprintlog(f, 0, (char *)NULL); if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0) { close_filed(f); f->f_un.f_pipe.f_pid = 0; } } Initialized = was_initialized; if (signo) { dprintf("syslogd: exiting on signal %d\n", signo); (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo); errno = 0; logerror(buf); } STAILQ_FOREACH(fx, &funixes, next) (void)unlink(fx->name); pidfile_remove(pfh); exit(1); } /* * INIT -- Initialize syslogd from configuration table */ static void init(int signo) { int i; FILE *cf; struct filed *f, *next, **nextp; char *p; char cline[LINE_MAX]; char prog[LINE_MAX]; char host[MAXHOSTNAMELEN]; char oldLocalHostName[MAXHOSTNAMELEN]; char hostMsg[2*MAXHOSTNAMELEN+40]; char bootfileMsg[LINE_MAX]; dprintf("init\n"); /* * Load hostname (may have changed). */ if (signo != 0) (void)strlcpy(oldLocalHostName, LocalHostName, sizeof(oldLocalHostName)); if (gethostname(LocalHostName, sizeof(LocalHostName))) err(EX_OSERR, "gethostname() failed"); if ((p = strchr(LocalHostName, '.')) != NULL) { *p++ = '\0'; LocalDomain = p; } else { LocalDomain = ""; } /* * Load / reload timezone data (in case it changed). * * Just calling tzset() again does not work, the timezone code * caches the result. However, by setting the TZ variable, one * can defeat the caching and have the timezone code really * reload the timezone data. Respect any initial setting of * TZ, in case the system is configured specially. */ dprintf("loading timezone data via tzset()\n"); if (getenv("TZ")) { tzset(); } else { setenv("TZ", ":/etc/localtime", 1); tzset(); unsetenv("TZ"); } /* * Close all open log files. */ Initialized = 0; for (f = Files; f != NULL; f = next) { /* flush any pending output */ if (f->f_prevcount) fprintlog(f, 0, (char *)NULL); switch (f->f_type) { case F_FILE: case F_FORW: case F_CONSOLE: case F_TTY: close_filed(f); break; case F_PIPE: if (f->f_un.f_pipe.f_pid > 0) { close_filed(f); deadq_enter(f->f_un.f_pipe.f_pid, f->f_un.f_pipe.f_pname); } f->f_un.f_pipe.f_pid = 0; break; } next = f->f_next; if (f->f_program) free(f->f_program); if (f->f_host) free(f->f_host); free((char *)f); } Files = NULL; nextp = &Files; /* open the configuration file */ if ((cf = fopen(ConfFile, "r")) == NULL) { dprintf("cannot open %s\n", ConfFile); *nextp = (struct filed *)calloc(1, sizeof(*f)); if (*nextp == NULL) { logerror("calloc"); exit(1); } cfline("*.ERR\t/dev/console", *nextp, "*", "*"); (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); if ((*nextp)->f_next == NULL) { logerror("calloc"); exit(1); } cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*"); Initialized = 1; return; } /* * Foreach line in the conf table, open that file. */ f = NULL; (void)strlcpy(host, "*", sizeof(host)); (void)strlcpy(prog, "*", sizeof(prog)); while (fgets(cline, sizeof(cline), cf) != NULL) { /* * check for end-of-section, comments, strip off trailing * spaces and newline character. #!prog is treated specially: * following lines apply only to that program. */ for (p = cline; isspace(*p); ++p) continue; if (*p == 0) continue; if (*p == '#') { p++; if (*p != '!' && *p != '+' && *p != '-') continue; } if (*p == '+' || *p == '-') { host[0] = *p++; while (isspace(*p)) p++; if ((!*p) || (*p == '*')) { (void)strlcpy(host, "*", sizeof(host)); continue; } if (*p == '@') p = LocalHostName; for (i = 1; i < MAXHOSTNAMELEN - 1; i++) { if (!isalnum(*p) && *p != '.' && *p != '-' && *p != ',' && *p != ':' && *p != '%') break; host[i] = *p++; } host[i] = '\0'; continue; } if (*p == '!') { p++; while (isspace(*p)) p++; if ((!*p) || (*p == '*')) { (void)strlcpy(prog, "*", sizeof(prog)); continue; } for (i = 0; i < LINE_MAX - 1; i++) { if (!isprint(p[i]) || isspace(p[i])) break; prog[i] = p[i]; } prog[i] = 0; continue; } for (p = cline + 1; *p != '\0'; p++) { if (*p != '#') continue; if (*(p - 1) == '\\') { strcpy(p - 1, p); p--; continue; } *p = '\0'; break; } for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--) cline[i] = '\0'; f = (struct filed *)calloc(1, sizeof(*f)); if (f == NULL) { logerror("calloc"); exit(1); } *nextp = f; nextp = &f->f_next; cfline(cline, f, prog, host); } /* close the configuration file */ (void)fclose(cf); Initialized = 1; if (Debug) { int port; for (f = Files; f; f = f->f_next) { for (i = 0; i <= LOG_NFACILITIES; i++) if (f->f_pmask[i] == INTERNAL_NOPRI) printf("X "); else printf("%d ", f->f_pmask[i]); printf("%s: ", TypeNames[f->f_type]); switch (f->f_type) { case F_FILE: printf("%s", f->f_un.f_fname); break; case F_CONSOLE: case F_TTY: printf("%s%s", _PATH_DEV, f->f_un.f_fname); break; case F_FORW: port = (int)ntohs(((struct sockaddr_in *) (f->f_un.f_forw.f_addr->ai_addr))->sin_port); if (port != 514) { printf("%s:%d", f->f_un.f_forw.f_hname, port); } else { printf("%s", f->f_un.f_forw.f_hname); } break; case F_PIPE: printf("%s", f->f_un.f_pipe.f_pname); break; case F_USERS: for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++) printf("%s, ", f->f_un.f_uname[i]); break; } if (f->f_program) printf(" (%s)", f->f_program); printf("\n"); } } logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE); dprintf("syslogd: restarted\n"); /* * Log a change in hostname, but only on a restart. */ if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) { (void)snprintf(hostMsg, sizeof(hostMsg), "syslogd: hostname changed, \"%s\" to \"%s\"", oldLocalHostName, LocalHostName); logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE); dprintf("%s\n", hostMsg); } /* * Log the kernel boot file if we aren't going to use it as * the prefix, and if this is *not* a restart. */ if (signo == 0 && !use_bootfile) { (void)snprintf(bootfileMsg, sizeof(bootfileMsg), "syslogd: kernel boot file is %s", bootfile); logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE); dprintf("%s\n", bootfileMsg); } } /* * Crack a configuration file line */ static void cfline(const char *line, struct filed *f, const char *prog, const char *host) { struct addrinfo hints, *res; int error, i, pri, syncfile; const char *p, *q; char *bp; char buf[MAXLINE], ebuf[100]; dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host); errno = 0; /* keep strerror() stuff out of logerror messages */ /* clear out file entry */ memset(f, 0, sizeof(*f)); for (i = 0; i <= LOG_NFACILITIES; i++) f->f_pmask[i] = INTERNAL_NOPRI; /* save hostname if any */ if (host && *host == '*') host = NULL; if (host) { int hl; f->f_host = strdup(host); if (f->f_host == NULL) { logerror("strdup"); exit(1); } hl = strlen(f->f_host); if (hl > 0 && f->f_host[hl-1] == '.') f->f_host[--hl] = '\0'; trimdomain(f->f_host, hl); } /* save program name if any */ if (prog && *prog == '*') prog = NULL; if (prog) { f->f_program = strdup(prog); if (f->f_program == NULL) { logerror("strdup"); exit(1); } } /* scan through the list of selectors */ for (p = line; *p && *p != '\t' && *p != ' ';) { int pri_done; int pri_cmp; int pri_invert; /* find the end of this facility name list */ for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; ) continue; /* get the priority comparison */ pri_cmp = 0; pri_done = 0; pri_invert = 0; if (*q == '!') { pri_invert = 1; q++; } while (!pri_done) { switch (*q) { case '<': pri_cmp |= PRI_LT; q++; break; case '=': pri_cmp |= PRI_EQ; q++; break; case '>': pri_cmp |= PRI_GT; q++; break; default: pri_done++; break; } } /* collect priority name */ for (bp = buf; *q && !strchr("\t,; ", *q); ) *bp++ = *q++; *bp = '\0'; /* skip cruft */ while (strchr(",;", *q)) q++; /* decode priority name */ if (*buf == '*') { pri = LOG_PRIMASK; pri_cmp = PRI_LT | PRI_EQ | PRI_GT; } else { /* Ignore trailing spaces. */ for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--) buf[i] = '\0'; pri = decode(buf, prioritynames); if (pri < 0) { errno = 0; (void)snprintf(ebuf, sizeof ebuf, "unknown priority name \"%s\"", buf); logerror(ebuf); return; } } if (!pri_cmp) pri_cmp = (UniquePriority) ? (PRI_EQ) : (PRI_EQ | PRI_GT) ; if (pri_invert) pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT; /* scan facilities */ while (*p && !strchr("\t.; ", *p)) { for (bp = buf; *p && !strchr("\t,;. ", *p); ) *bp++ = *p++; *bp = '\0'; if (*buf == '*') { for (i = 0; i < LOG_NFACILITIES; i++) { f->f_pmask[i] = pri; f->f_pcmp[i] = pri_cmp; } } else { i = decode(buf, facilitynames); if (i < 0) { errno = 0; (void)snprintf(ebuf, sizeof ebuf, "unknown facility name \"%s\"", buf); logerror(ebuf); return; } f->f_pmask[i >> 3] = pri; f->f_pcmp[i >> 3] = pri_cmp; } while (*p == ',' || *p == ' ') p++; } p = q; } /* skip to action part */ while (*p == '\t' || *p == ' ') p++; if (*p == '-') { syncfile = 0; p++; } else syncfile = 1; switch (*p) { case '@': { char *tp; char endkey = ':'; /* * scan forward to see if there is a port defined. * so we can't use strlcpy.. */ i = sizeof(f->f_un.f_forw.f_hname); tp = f->f_un.f_forw.f_hname; p++; /* * an ipv6 address should start with a '[' in that case * we should scan for a ']' */ if (*p == '[') { p++; endkey = ']'; } while (*p && (*p != endkey) && (i-- > 0)) { *tp++ = *p++; } if (endkey == ']' && *p == endkey) p++; *tp = '\0'; } /* See if we copied a domain and have a port */ if (*p == ':') p++; else p = NULL; memset(&hints, 0, sizeof(hints)); hints.ai_family = family; hints.ai_socktype = SOCK_DGRAM; error = getaddrinfo(f->f_un.f_forw.f_hname, p ? p : "syslog", &hints, &res); if (error) { logerror(gai_strerror(error)); break; } f->f_un.f_forw.f_addr = res; f->f_type = F_FORW; break; case '/': if ((f->f_file = open(p, logflags, 0600)) < 0) { f->f_type = F_UNUSED; logerror(p); break; } if (syncfile) f->f_flags |= FFLAG_SYNC; if (isatty(f->f_file)) { if (strcmp(p, ctty) == 0) f->f_type = F_CONSOLE; else f->f_type = F_TTY; (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1, sizeof(f->f_un.f_fname)); } else { (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); f->f_type = F_FILE; } break; case '|': f->f_un.f_pipe.f_pid = 0; (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1, sizeof(f->f_un.f_pipe.f_pname)); f->f_type = F_PIPE; break; case '*': f->f_type = F_WALL; break; default: for (i = 0; i < MAXUNAMES && *p; i++) { for (q = p; *q && *q != ','; ) q++; (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1); if ((q - p) >= MAXLOGNAME) f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0'; else f->f_un.f_uname[i][q - p] = '\0'; while (*q == ',' || *q == ' ') q++; p = q; } f->f_type = F_USERS; break; } } /* * Decode a symbolic name to a numeric value */ static int decode(const char *name, const CODE *codetab) { const CODE *c; char *p, buf[40]; if (isdigit(*name)) return (atoi(name)); for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { if (isupper(*name)) *p = tolower(*name); else *p = *name; } *p = '\0'; for (c = codetab; c->c_name; c++) if (!strcmp(buf, c->c_name)) return (c->c_val); return (-1); } static void markit(void) { struct filed *f; dq_t q, next; now = time((time_t *)NULL); MarkSeq += TIMERINTVL; if (MarkSeq >= MarkInterval) { logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK); MarkSeq = 0; } for (f = Files; f; f = f->f_next) { if (f->f_prevcount && now >= REPEATTIME(f)) { dprintf("flush %s: repeated %d times, %d sec.\n", TypeNames[f->f_type], f->f_prevcount, repeatinterval[f->f_repeatcount]); fprintlog(f, 0, (char *)NULL); BACKOFF(f); } } /* Walk the dead queue, and see if we should signal somebody. */ for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) { next = TAILQ_NEXT(q, dq_entries); switch (q->dq_timeout) { case 0: /* Already signalled once, try harder now. */ if (kill(q->dq_pid, SIGKILL) != 0) (void)deadq_remove(q->dq_pid); break; case 1: /* * Timed out on dead queue, send terminate * signal. Note that we leave the removal * from the dead queue to reapchild(), which * will also log the event (unless the process * didn't even really exist, in case we simply * drop it from the dead queue). */ if (kill(q->dq_pid, SIGTERM) != 0) (void)deadq_remove(q->dq_pid); /* FALLTHROUGH */ default: q->dq_timeout--; } } MarkSet = 0; (void)alarm(TIMERINTVL); } /* * fork off and become a daemon, but wait for the child to come online * before returing to the parent, or we get disk thrashing at boot etc. * Set a timer so we don't hang forever if it wedges. */ static int waitdaemon(int nochdir, int noclose, int maxwait) { int fd; int status; pid_t pid, childpid; switch (childpid = fork()) { case -1: return (-1); case 0: break; default: signal(SIGALRM, timedout); alarm(maxwait); while ((pid = wait3(&status, 0, NULL)) != -1) { if (WIFEXITED(status)) errx(1, "child pid %d exited with return code %d", pid, WEXITSTATUS(status)); if (WIFSIGNALED(status)) errx(1, "child pid %d exited on signal %d%s", pid, WTERMSIG(status), WCOREDUMP(status) ? " (core dumped)" : ""); if (pid == childpid) /* it's gone... */ break; } exit(0); } if (setsid() == -1) return (-1); if (!nochdir) (void)chdir("/"); if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { (void)dup2(fd, STDIN_FILENO); (void)dup2(fd, STDOUT_FILENO); (void)dup2(fd, STDERR_FILENO); if (fd > 2) (void)close (fd); } return (getppid()); } /* * We get a SIGALRM from the child when it's running and finished doing it's * fsync()'s or O_SYNC writes for all the boot messages. * * We also get a signal from the kernel if the timer expires, so check to * see what happened. */ static void timedout(int sig __unused) { int left; left = alarm(0); signal(SIGALRM, SIG_DFL); if (left == 0) errx(1, "timed out waiting for child"); else _exit(0); } /* * Add `s' to the list of allowable peer addresses to accept messages * from. * * `s' is a string in the form: * * [*]domainname[:{servicename|portnumber|*}] * * or * * netaddr/maskbits[:{servicename|portnumber|*}] * * Returns -1 on error, 0 if the argument was valid. */ static int allowaddr(char *s) { char *cp1, *cp2; struct allowedpeer ap; struct servent *se; int masklen = -1; struct addrinfo hints, *res; struct in_addr *addrp, *maskp; #ifdef INET6 int i; u_int32_t *addr6p, *mask6p; #endif char ip[NI_MAXHOST]; #ifdef INET6 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL) #endif cp1 = s; if ((cp1 = strrchr(cp1, ':'))) { /* service/port provided */ *cp1++ = '\0'; if (strlen(cp1) == 1 && *cp1 == '*') /* any port allowed */ ap.port = 0; else if ((se = getservbyname(cp1, "udp"))) { ap.port = ntohs(se->s_port); } else { ap.port = strtol(cp1, &cp2, 0); if (*cp2 != '\0') return (-1); /* port not numeric */ } } else { if ((se = getservbyname("syslog", "udp"))) ap.port = ntohs(se->s_port); else /* sanity, should not happen */ ap.port = 514; } if ((cp1 = strchr(s, '/')) != NULL && strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) { *cp1 = '\0'; if ((masklen = atoi(cp1 + 1)) < 0) return (-1); } #ifdef INET6 if (*s == '[') { cp2 = s + strlen(s) - 1; if (*cp2 == ']') { ++s; *cp2 = '\0'; } else { cp2 = NULL; } } else { cp2 = NULL; } #endif memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST; if (getaddrinfo(s, NULL, &hints, &res) == 0) { ap.isnumeric = 1; memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen); memset(&ap.a_mask, 0, sizeof(ap.a_mask)); ap.a_mask.ss_family = res->ai_family; if (res->ai_family == AF_INET) { ap.a_mask.ss_len = sizeof(struct sockaddr_in); maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr; addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr; if (masklen < 0) { /* use default netmask */ if (IN_CLASSA(ntohl(addrp->s_addr))) maskp->s_addr = htonl(IN_CLASSA_NET); else if (IN_CLASSB(ntohl(addrp->s_addr))) maskp->s_addr = htonl(IN_CLASSB_NET); else maskp->s_addr = htonl(IN_CLASSC_NET); } else if (masklen <= 32) { /* convert masklen to netmask */ if (masklen == 0) maskp->s_addr = 0; else maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1)); } else { freeaddrinfo(res); return (-1); } /* Lose any host bits in the network number. */ addrp->s_addr &= maskp->s_addr; } #ifdef INET6 else if (res->ai_family == AF_INET6 && masklen <= 128) { ap.a_mask.ss_len = sizeof(struct sockaddr_in6); if (masklen < 0) masklen = 128; mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr; /* convert masklen to netmask */ while (masklen > 0) { if (masklen < 32) { *mask6p = htonl(~(0xffffffff >> masklen)); break; } *mask6p++ = 0xffffffff; masklen -= 32; } /* Lose any host bits in the network number. */ mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr; addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr; for (i = 0; i < 4; i++) addr6p[i] &= mask6p[i]; } #endif else { freeaddrinfo(res); return (-1); } freeaddrinfo(res); } else { /* arg `s' is domain name */ ap.isnumeric = 0; ap.a_name = s; if (cp1) *cp1 = '/'; #ifdef INET6 if (cp2) { *cp2 = ']'; --s; } #endif } if (Debug) { printf("allowaddr: rule %d: ", NumAllowed); if (ap.isnumeric) { printf("numeric, "); getnameinfo((struct sockaddr *)&ap.a_addr, ((struct sockaddr *)&ap.a_addr)->sa_len, ip, sizeof ip, NULL, 0, NI_NUMERICHOST); printf("addr = %s, ", ip); getnameinfo((struct sockaddr *)&ap.a_mask, ((struct sockaddr *)&ap.a_mask)->sa_len, ip, sizeof ip, NULL, 0, NI_NUMERICHOST); printf("mask = %s; ", ip); } else { printf("domainname = %s; ", ap.a_name); } printf("port = %d\n", ap.port); } if ((AllowedPeers = realloc(AllowedPeers, ++NumAllowed * sizeof(struct allowedpeer))) == NULL) { logerror("realloc"); exit(1); } memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer)); return (0); } /* * Validate that the remote peer has permission to log to us. */ static int validate(struct sockaddr *sa, const char *hname) { int i; size_t l1, l2; char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV]; struct allowedpeer *ap; struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL; #ifdef INET6 int j, reject; struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL; #endif struct addrinfo hints, *res; u_short sport; if (NumAllowed == 0) /* traditional behaviour, allow everything */ return (1); (void)strlcpy(name, hname, sizeof(name)); memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST; if (getaddrinfo(name, NULL, &hints, &res) == 0) freeaddrinfo(res); else if (strchr(name, '.') == NULL) { strlcat(name, ".", sizeof name); strlcat(name, LocalDomain, sizeof name); } if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port, NI_NUMERICHOST | NI_NUMERICSERV) != 0) return (0); /* for safety, should not occur */ dprintf("validate: dgram from IP %s, port %s, name %s;\n", ip, port, name); sport = atoi(port); /* now, walk down the list */ for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) { if (ap->port != 0 && ap->port != sport) { dprintf("rejected in rule %d due to port mismatch.\n", i); continue; } if (ap->isnumeric) { if (ap->a_addr.ss_family != sa->sa_family) { dprintf("rejected in rule %d due to address family mismatch.\n", i); continue; } if (ap->a_addr.ss_family == AF_INET) { sin4 = (struct sockaddr_in *)sa; a4p = (struct sockaddr_in *)&ap->a_addr; m4p = (struct sockaddr_in *)&ap->a_mask; if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr) != a4p->sin_addr.s_addr) { dprintf("rejected in rule %d due to IP mismatch.\n", i); continue; } } #ifdef INET6 else if (ap->a_addr.ss_family == AF_INET6) { sin6 = (struct sockaddr_in6 *)sa; a6p = (struct sockaddr_in6 *)&ap->a_addr; m6p = (struct sockaddr_in6 *)&ap->a_mask; if (a6p->sin6_scope_id != 0 && sin6->sin6_scope_id != a6p->sin6_scope_id) { dprintf("rejected in rule %d due to scope mismatch.\n", i); continue; } reject = 0; for (j = 0; j < 16; j += 4) { if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j]) != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) { ++reject; break; } } if (reject) { dprintf("rejected in rule %d due to IP mismatch.\n", i); continue; } } #endif else continue; } else { cp = ap->a_name; l1 = strlen(name); if (*cp == '*') { /* allow wildmatch */ cp++; l2 = strlen(cp); if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) { dprintf("rejected in rule %d due to name mismatch.\n", i); continue; } } else { /* exact match */ l2 = strlen(cp); if (l2 != l1 || memcmp(cp, name, l1) != 0) { dprintf("rejected in rule %d due to name mismatch.\n", i); continue; } } } dprintf("accepted in rule %d.\n", i); return (1); /* hooray! */ } return (0); } /* * Fairly similar to popen(3), but returns an open descriptor, as * opposed to a FILE *. */ static int p_open(const char *prog, pid_t *rpid) { int pfd[2], nulldesc; pid_t pid; sigset_t omask, mask; char *argv[4]; /* sh -c cmd NULL */ char errmsg[200]; if (pipe(pfd) == -1) return (-1); if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1) /* we are royally screwed anyway */ return (-1); sigemptyset(&mask); sigaddset(&mask, SIGALRM); sigaddset(&mask, SIGHUP); sigprocmask(SIG_BLOCK, &mask, &omask); switch ((pid = fork())) { case -1: sigprocmask(SIG_SETMASK, &omask, 0); close(nulldesc); return (-1); case 0: argv[0] = strdup("sh"); argv[1] = strdup("-c"); argv[2] = strdup(prog); argv[3] = NULL; if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) { logerror("strdup"); exit(1); } alarm(0); (void)setsid(); /* Avoid catching SIGHUPs. */ /* * Throw away pending signals, and reset signal * behaviour to standard values. */ signal(SIGALRM, SIG_IGN); signal(SIGHUP, SIG_IGN); sigprocmask(SIG_SETMASK, &omask, 0); signal(SIGPIPE, SIG_DFL); signal(SIGQUIT, SIG_DFL); signal(SIGALRM, SIG_DFL); signal(SIGHUP, SIG_DFL); dup2(pfd[0], STDIN_FILENO); dup2(nulldesc, STDOUT_FILENO); dup2(nulldesc, STDERR_FILENO); closefrom(3); (void)execvp(_PATH_BSHELL, argv); _exit(255); } sigprocmask(SIG_SETMASK, &omask, 0); close(nulldesc); close(pfd[0]); /* * Avoid blocking on a hung pipe. With O_NONBLOCK, we are * supposed to get an EWOULDBLOCK on writev(2), which is * caught by the logic above anyway, which will in turn close * the pipe, and fork a new logging subprocess if necessary. * The stale subprocess will be killed some time later unless * it terminated itself due to closing its input pipe (so we * get rid of really dead puppies). */ if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) { /* This is bad. */ (void)snprintf(errmsg, sizeof errmsg, "Warning: cannot change pipe to PID %d to " "non-blocking behaviour.", (int)pid); logerror(errmsg); } *rpid = pid; return (pfd[1]); } static void deadq_enter(pid_t pid, const char *name) { dq_t p; int status; /* * Be paranoid, if we can't signal the process, don't enter it * into the dead queue (perhaps it's already dead). If possible, * we try to fetch and log the child's status. */ if (kill(pid, 0) != 0) { if (waitpid(pid, &status, WNOHANG) > 0) log_deadchild(pid, status, name); return; } p = malloc(sizeof(struct deadq_entry)); if (p == NULL) { logerror("malloc"); exit(1); } p->dq_pid = pid; p->dq_timeout = DQ_TIMO_INIT; TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries); } static int deadq_remove(pid_t pid) { dq_t q; TAILQ_FOREACH(q, &deadq_head, dq_entries) { if (q->dq_pid == pid) { TAILQ_REMOVE(&deadq_head, q, dq_entries); free(q); return (1); } } return (0); } static void log_deadchild(pid_t pid, int status, const char *name) { int code; char buf[256]; const char *reason; errno = 0; /* Keep strerror() stuff out of logerror messages. */ if (WIFSIGNALED(status)) { reason = "due to signal"; code = WTERMSIG(status); } else { reason = "with status"; code = WEXITSTATUS(status); if (code == 0) return; } (void)snprintf(buf, sizeof buf, "Logging subprocess %d (%s) exited %s %d.", pid, name, reason, code); logerror(buf); } static int * socksetup(int af, char *bindhostname) { struct addrinfo hints, *res, *r; const char *bindservice; char *cp; int error, maxs, *s, *socks; /* * We have to handle this case for backwards compatibility: * If there are two (or more) colons but no '[' and ']', * assume this is an inet6 address without a service. */ bindservice = "syslog"; if (bindhostname != NULL) { #ifdef INET6 if (*bindhostname == '[' && (cp = strchr(bindhostname + 1, ']')) != NULL) { ++bindhostname; *cp = '\0'; if (cp[1] == ':' && cp[2] != '\0') bindservice = cp + 2; } else { #endif cp = strchr(bindhostname, ':'); if (cp != NULL && strchr(cp + 1, ':') == NULL) { *cp = '\0'; if (cp[1] != '\0') bindservice = cp + 1; if (cp == bindhostname) bindhostname = NULL; } #ifdef INET6 } #endif } memset(&hints, 0, sizeof(hints)); hints.ai_flags = AI_PASSIVE; hints.ai_family = af; hints.ai_socktype = SOCK_DGRAM; error = getaddrinfo(bindhostname, bindservice, &hints, &res); if (error) { logerror(gai_strerror(error)); errno = 0; die(0); } /* Count max number of sockets we may open */ for (maxs = 0, r = res; r; r = r->ai_next, maxs++); socks = malloc((maxs+1) * sizeof(int)); if (socks == NULL) { logerror("couldn't allocate memory for sockets"); die(0); } *socks = 0; /* num of sockets counter at start of array */ s = socks + 1; for (r = res; r; r = r->ai_next) { int on = 1; *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol); if (*s < 0) { logerror("socket"); continue; } #ifdef INET6 if (r->ai_family == AF_INET6) { if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&on, sizeof (on)) < 0) { logerror("setsockopt"); close(*s); continue; } } #endif if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof (on)) < 0) { logerror("setsockopt"); close(*s); continue; } /* * RFC 3164 recommends that client side message * should come from the privileged syslogd port. * * If the system administrator choose not to obey * this, we can skip the bind() step so that the * system will choose a port for us. */ if (!NoBind) { if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) { logerror("bind"); close(*s); continue; } if (!SecureMode) increase_rcvbuf(*s); } (*socks)++; dprintf("socksetup: new socket fd is %d\n", *s); s++; } if (*socks == 0) { free(socks); if (Debug) return (NULL); else die(0); } if (res) freeaddrinfo(res); return (socks); } static void increase_rcvbuf(int fd) { socklen_t len, slen; slen = sizeof(len); if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) { if (len < RCVBUF_MINSIZE) { len = RCVBUF_MINSIZE; setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)); } } }