+++ /dev/null
-/*
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 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 */
-
-/*
- * syslogd -- log system messages
- *
- * This program implements a system log. It takes a series of lines.
- * Each line may have a priority, signified as "<n>" 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 maximimum 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 DEFUPRI (LOG_USER|LOG_NOTICE)
-#define DEFSPRI (LOG_KERN|LOG_CRIT)
-#define TIMERINTVL 30 /* interval for checking flush, mark */
-#define TTYMSGTIME 1 /* timed out passed to ttymsg */
-
-#include <sys/param.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/socket.h>
-#include <sys/queue.h>
-#include <sys/uio.h>
-#include <sys/un.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <sys/syslimits.h>
-#include <grp.h>
-
-#include <netinet/in.h>
-#include <netdb.h>
-#include <arpa/inet.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <paths.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sysexits.h>
-#include <unistd.h>
-#include <utmp.h>
-#include <string.h>
-#include <notify.h>
-
-#ifndef NETWORK_CHANGE_NOTIFICATION
-#define NETWORK_CHANGE_NOTIFICATION "com.apple.system.config.network_change"
-#endif
-
-#include "pathnames.h"
-#include "ttymsg.h"
-
-#define SYSLOG_NAMES
-#include <sys/syslog.h>
-
-#ifdef NI_WITHSCOPEID
-static const int withscopeid = NI_WITHSCOPEID;
-#else
-static const int withscopeid;
-#endif
-
-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 */
-
-#define MAXFUNIX 20
-
-int nfunix = 1;
-const char *funixn[MAXFUNIX] = { _PATH_LOG };
-int funix[MAXFUNIX];
-
-/*
- * 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.
- */
-
-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][UT_NAMESIZE+1];
- 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 */
-};
-
-/*
- * 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 */
-#define F_CHECKTTY 8 /* think it's a tty, so check */
-
-const char *TypeNames[9] = {
- "UNUSED", "FILE", "TTY", "CONSOLE",
- "FORW", "USERS", "WALL", "PIPE",
- "CHECKTTY"
-};
-
-static struct filed *Files = NULL; /* Log files that we write to */
-static struct filed consfile; /* Console */
-
-static int Debug = 0; /* debug flag */
-static int resolve = 1; /* resolve hostname */
-static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
-static char *LocalDomain = NULL; /* our local domain name */
-static int *finet = NULL; /* Internet datagram socket */
-static int fklog = -1; /* /dev/klog */
-static int Initialized = 0; /* set when we have initialized ourselves */
-static int MarkInterval = 20 * 60; /* interval between marks in seconds */
-static int MarkSeq = 0; /* mark sequence number */
-#ifdef __APPLE__
-static int RcvSockBufSize = 49152; /* Our default receive socket buffer size 3301629*/
-#endif
-static int SecureMode = 0; /* 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 send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
-static int use_bootfile = 0; /* log entire bootfile for every kern msg */
-static int no_compress = 0; /* don't compress messages (1=pipes, 2=all) */
-
-static char bootfile[MAXLINE+1]; /* booted kernel file */
-
-struct allowedpeer *AllowedPeers = NULL; /* List of allowed peers */
-static int NumAllowed = 0; /* Number of entries in AllowedPeers */
-
-static int UniquePriority = 0; /* Only log specified priority? */
-static int LogFacPri = 0; /* Put facility and priority in log message: */
- /* 0=no, 1=numeric, 2=names */
-static int KeepKernFac = 0; /* Keep remotely logged kernel facility */
-static int create_files = 0;
-
-volatile sig_atomic_t MarkSet = 0, WantDie = 0;
-
-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 *, CODE *);
-static void die(int);
-static void dodie(int);
-static void domark(int);
-static void fprintlog(struct filed *, int, const char *);
-static int *socksetup(int, const 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 *);
-static void printline(const char *, char *);
-static void printsys(char *);
-static int p_open(const char *, pid_t *);
-static void readklog(void);
-static void reapchild(int);
-static void usage(void);
-static int validate(struct sockaddr *, const char *);
-static void unmapped(struct sockaddr *);
-static void wallmsg(struct filed *, struct iovec *);
-static int waitdaemon(int, int, int);
-static void timedout(int);
-
-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;
- FILE *fp;
- char line[MAXLINE + 1];
- const char *bindhostname, *hname;
- struct timeval tv, *tvp;
- struct sigaction sact;
- sigset_t mask;
- pid_t ppid = 1;
- socklen_t len;
- int nctoken = -1;
-
- bindhostname = NULL;
- while ((ch = getopt(argc, argv, "46ACa:b:cdf:kl:m:nop:P:suv")) != -1)
- switch (ch) {
- case '4':
- family = PF_INET;
- break;
-#ifdef INET6
- case '6':
- family = PF_INET6;
- break;
-#endif
- case 'A':
- send_to_all++;
- break;
- case 'C':
- create_files++;
- break;
- case 'a': /* allow specific network addresses only */
- if (allowaddr(optarg) == -1)
- usage();
- break;
- case 'b':
- bindhostname = optarg;
- break;
- case 'c':
- no_compress++;
- break;
- case 'd': /* debug */
- Debug++;
- break;
- case 'f': /* configuration file */
- ConfFile = optarg;
- break;
- case 'k': /* keep remote kern fac */
- KeepKernFac = 1;
- break;
- case 'l':
- if (nfunix < MAXFUNIX)
- funixn[nfunix++] = optarg;
- else
- warnx("out of descriptors, ignoring %s",
- optarg);
- break;
- case 'm': /* mark interval */
- MarkInterval = atoi(optarg) * 60;
- break;
- case 'n':
- resolve = 0;
- break;
- case 'o':
- use_bootfile = 1;
- break;
- case 'p': /* path */
- funixn[0] = optarg;
- break;
- case 'P': /* path for alt. PID */
- PidFile = optarg;
- break;
- case 's': /* no network mode */
- SecureMode++;
- break;
- case 'u': /* only log specified priority */
- UniquePriority++;
- break;
- case 'v': /* log facility and priority */
- LogFacPri++;
- break;
- case '?':
- default:
- usage();
- }
- if ((argc -= optind) != 0)
- usage();
-
- if (!Debug) {
- ppid = waitdaemon(0, 0, 30);
- if (ppid < 0)
- err(1, "could not become daemon");
- } else {
- 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));
-#ifdef __APPLE__
- /* We lack getbootfile() 3187949 and 3187947 */
- (void)strlcpy(bootfile, "/mach_kernel", sizeof("/mach_kernel"));
-#else
- (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
-#endif
- (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. */
- notify_register_signal(NETWORK_CHANGE_NOTIFICATION, SIGHUP, &nctoken);
- (void)alarm(TIMERINTVL);
-
- TAILQ_INIT(&deadq_head);
-
-#ifndef SUN_LEN
-#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
-#endif
- for (i = 0; i < nfunix; i++) {
- (void)unlink(funixn[i]);
- memset(&sunx, 0, sizeof(sunx));
- sunx.sun_family = AF_UNIX;
- (void)strlcpy(sunx.sun_path, funixn[i], sizeof(sunx.sun_path));
- funix[i] = socket(AF_UNIX, SOCK_DGRAM, 0);
- if (funix[i] < 0 ||
- bind(funix[i], (struct sockaddr *)&sunx,
- SUN_LEN(&sunx)) < 0 ||
- chmod(funixn[i], 0666) < 0) {
- (void)snprintf(line, sizeof line,
- "cannot create %s", funixn[i]);
- logerror(line);
- dprintf("cannot create %s (%d)\n", funixn[i], errno);
- if (i == 0)
- die(0);
- }
-#ifdef __APPLE__
- if (setsockopt(funix[i], SOL_SOCKET, SO_RCVBUF, &RcvSockBufSize, sizeof(int)) < 0)
- logerror("setsockopt funix");
-#endif
- }
- if (SecureMode <= 1)
- finet = socksetup(family, bindhostname);
-
- if (finet) {
- if (SecureMode) {
- for (i = 0; i < *finet; i++) {
- if (shutdown(finet[i+1], SHUT_RD) < 0) {
- 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 */
- fp = fopen(PidFile, "w");
- if (fp != NULL) {
- fprintf(fp, "%d\n", getpid());
- (void)fclose(fp);
- }
-
- 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];
- }
- }
- for (i = 0; i < nfunix; i++) {
- if (funix[i] != -1 && funix[i] > fdsrmax)
- fdsrmax = funix[i];
- }
-
- 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);
- }
- }
- for (i = 0; i < nfunix; i++) {
- if (funix[i] != -1)
- FD_SET(funix[i], fdsr);
- }
-
- i = select(fdsrmax+1, fdsr, NULL, NULL, tvp);
- switch (i) {
- case 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);
- } else if (l < 0 && errno != EINTR)
- logerror("recvfrom inet");
- }
- }
- }
- for (i = 0; i < nfunix; i++) {
- if (funix[i] != -1 && FD_ISSET(funix[i], fdsr)) {
- len = sizeof(fromunix);
- l = recvfrom(funix[i], line, MAXLINE, 0,
- (struct sockaddr *)&fromunix, &len);
- if (l > 0) {
- line[l] = '\0';
- printline(LocalHostName, line);
- } 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 [-46Acdknosuv] [-a allowed_peer]",
- " [-b bind address] [-f config_file]",
- " [-l log_socket] [-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 c, pri;
- char *p, *q, line[MAXLINE + 1];
-
- /* test for special codes */
- pri = DEFUPRI;
- p = msg;
- if (*p == '<') {
- pri = 0;
- while (isdigit(*++p))
- pri = 10 * pri + (*p - '0');
- if (*p == '>')
- ++p;
- }
- if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
- pri = DEFUPRI;
-
- /* don't allow users to log kernel messages */
- if (LOG_FAC(pri) == LOG_KERN && !KeepKernFac)
- pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
-
- q = line;
-
- while ((c = (unsigned char)*p++) != '\0' &&
- q < &line[sizeof(line) - 4]) {
-#ifdef __APPLE__
- /* Gross installer hack to be removed 3314128 */
- if (LOG_FACMASK&pri != LOG_INSTALL) {
- if ((c & 0x80) && c < 0xA0) {
- c &= 0x7F;
- *q++ = 'M';
- *q++ = '-';
- }
- }
-#endif
- 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, 0);
-}
-
-/*
- * 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 *p)
-{
- int pri, flags;
-
- flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
- pri = DEFSPRI;
- if (*p == '<') {
- pri = 0;
- while (isdigit(*++p))
- pri = 10 * pri + (*p - '0');
- if (*p == '>')
- ++p;
-#ifndef __APPLE__
- if ((pri & LOG_FACMASK) == LOG_CONSOLE)
- flags |= IGN_CONS;
-#endif
- } else {
- /* kernel printf's come out on 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) {
- 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;
- }
- s = strstr (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);
- prilev = LOG_PRI(pri);
-
- /* extract program name */
- for (i = 0; i < NAME_MAX; i++) {
- if (!isprint(msg[i]) || msg[i] == ':' || 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;
- f->f_file = open(ctty, O_WRONLY, 0);
-
- if (f->f_file >= 0) {
- fprintlog(f, flags, msg);
- (void)close(f->f_file);
- }
- (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))
- continue;
-
- /* skip messages with the incorrect program name */
- if (skip_message(prog, f->f_program))
- 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, 16);
- 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, 16);
- (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
-fprintlog(struct filed *f, int flags, const char *msg)
-{
- struct iovec iov[7];
- struct iovec *v;
- struct addrinfo *r;
- int i, l, lsent = 0;
- char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
- const char *msgret;
-
- v = iov;
- if (f->f_type == F_WALL) {
- v->iov_base = greetings;
- v->iov_len = snprintf(greetings, sizeof greetings,
- "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
- f->f_prevhost, ctime(&now));
- if (v->iov_len > 0)
- v++;
- v->iov_base = "";
- v->iov_len = 0;
- v++;
- } else {
- v->iov_base = f->f_lasttime;
- v->iov_len = 15;
- v++;
- v->iov_base = " ";
- 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) {
- 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="";
- v->iov_len = 0;
- }
- v++;
-
- v->iov_base = f->f_prevhost;
- v->iov_len = strlen(v->iov_base);
- v++;
- v->iov_base = " ";
- 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++;
-
- if (f->f_file == -1) {
- int oflags = O_WRONLY|O_APPEND;
- struct group *gr;
- struct stat sb;
- int mode = 0640;
- int exists = 0;
-
- if( stat(f->f_un.f_fname, &sb) == 0 ) {
- mode = 0;
- exists++;
- }
- if (create_files && !exists)
- oflags |= O_CREAT;
- if ((f->f_file = open(f->f_un.f_fname, oflags, mode)) < 0) {
- f->f_type = F_UNUSED;
- /* We can no longer log this error, since calling
- * logerror() could bring us back here again.
- * Instead, call dprintf(), which will aid in
- * debugging, but not cause the looping.
- */
- dprintf("Error openning %s", f->f_un.f_fname);
- if (msg) free(wmsg);
- return;
- }
- /* Only chown the file if we created it. If it already
- * existed, leave whatever was there.
- */
- if( !exists ) {
- gr = getgrnam("admin");
- if( gr )
- fchown(f->f_file, 0, gr->gr_gid);
- }
- if (f->f_type == F_CHECKTTY) {
- if (isatty(f->f_file)) {
- if (strcmp(f->f_un.f_fname, ctty) == 0)
- f->f_type = F_CONSOLE;
- else
- f->f_type = F_TTY;
- }
- }
- }
-
- dprintf("Logging to %s", TypeNames[f->f_type]);
- f->f_time = now;
-
- switch (f->f_type) {
- case F_UNUSED:
- dprintf("\n");
- break;
-
- case F_FORW:
- 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, iov[0].iov_base, f->f_prevhost,
- iov[5].iov_base);
- else
- l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
- f->f_prevpri, iov[0].iov_base, 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 EHOSTUNREACH:
- case EHOSTDOWN:
- break;
- /* case EBADF: */
- /* case EACCES: */
- /* case ENOTSOCK: */
- /* case EFAULT: */
- /* case EMSGSIZE: */
- /* case EAGAIN: */
- /* case ENOBUFS: */
- /* case ECONNREFUSED: */
- default:
- dprintf("removing entry\n");
- (void)close(f->f_file);
- f->f_type = F_UNUSED;
- break;
- }
- }
- }
- break;
-
- case F_FILE:
- dprintf(" %s\n", f->f_un.f_fname);
- v->iov_base = "\n";
- v->iov_len = 1;
- if (writev(f->f_file, iov, 7) < 0) {
- int e = errno;
- (void)close(f->f_file);
- f->f_type = F_UNUSED;
- errno = e;
- logerror(f->f_un.f_fname);
- } else if (flags & SYNC_FILE)
- (void)fsync(f->f_file);
- break;
-
- case F_PIPE:
- dprintf(" %s\n", f->f_un.f_pipe.f_pname);
- v->iov_base = "\n";
- 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, 7) < 0) {
- int e = errno;
- (void)close(f->f_file);
- 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 = "\r\n";
- v->iov_len = 2;
-
- errno = 0; /* ttymsg() only sometimes returns an errno */
- if ((msgret = ttymsg(iov, 7, 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 = "\r\n";
- v->iov_len = 2;
- wallmsg(f, iov);
- break;
- }
- f->f_prevcount = 0;
- if (msg)
- 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)
-{
- static int reenter; /* avoid calling ourselves */
- FILE *uf;
- struct utmp ut;
- int i;
- const char *p;
- char line[sizeof(ut.ut_line) + 1];
-
- if (reenter++)
- return;
- if ((uf = fopen(_PATH_UTMP, "r")) == NULL) {
- logerror(_PATH_UTMP);
- reenter = 0;
- return;
- }
- /* NOSTRICT */
- while (fread((char *)&ut, sizeof(ut), 1, uf) == 1) {
- if (ut.ut_name[0] == '\0')
- continue;
- (void)strlcpy(line, ut.ut_line, sizeof(line));
- if (f->f_type == F_WALL) {
- if ((p = ttymsg(iov, 7, 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 (!strncmp(f->f_un.f_uname[i], ut.ut_name,
- UT_NAMESIZE)) {
- if ((p = ttymsg(iov, 7, line, TTYMSGTIME))
- != NULL) {
- errno = 0; /* already in msg */
- logerror(p);
- }
- break;
- }
- }
- }
- (void)fclose(uf);
- reenter = 0;
-}
-
-static void
-reapchild(int signo )
-{
- 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) {
- (void)close(f->f_file);
- 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;
- sigset_t omask, nmask;
- char *p;
- 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 | withscopeid);
- 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 | withscopeid);
- sigprocmask(SIG_SETMASK, &omask, NULL);
- if (error) {
- dprintf("Host name for your address (%s) unknown\n", ip);
- return (ip);
- }
- /* XXX Not quite correct, but close enough for government work. */
- if ((p = strchr(hname, '.')) && strcasecmp(p + 1, LocalDomain) == 0)
- *p = '\0';
- return (hname);
-}
-
-static void
-dodie(int signo)
-{
-
- WantDie = signo;
-}
-
-static void
-domark(int signo )
-{
-
- MarkSet = 1;
-}
-
-/*
- * Print syslogd errors some place.
- */
-static void
-logerror(const char *type)
-{
- char buf[512];
-
- 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);
-}
-
-static void
-die(int signo)
-{
- struct filed *f;
- int was_initialized;
- char buf[100];
- int i;
-
- 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)
- (void)close(f->f_file);
- }
- 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);
- }
- for (i = 0; i < nfunix; i++)
- if (funixn[i] && funix[i] != -1)
- (void)unlink(funixn[i]);
- 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[NAME_MAX+1];
- 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 = "";
- }
-
- /*
- * 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:
- (void)close(f->f_file);
- break;
- case F_PIPE:
- (void)close(f->f_file);
- 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;
- 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 != ',')
- 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 < NAME_MAX; i++) {
- if (!isprint(p[i]))
- break;
- prog[i] = p[i];
- }
- prog[i] = 0;
- continue;
- }
- for (p = strchr(cline, '\0'); isspace(*--p);)
- continue;
- *++p = '\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) {
- 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:
- 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;
- const char *p, *q;
- char *bp, *port;
- 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, dl;
-
- f->f_host = strdup(host);
- if (f->f_host == NULL) {
- logerror("strdup");
- exit(1);
- }
- hl = strlen(f->f_host);
- if (f->f_host[hl-1] == '.')
- f->f_host[--hl] = '\0';
- dl = strlen(LocalDomain) + 1;
- if (hl > dl && f->f_host[hl-dl] == '.' &&
- strcasecmp(f->f_host + hl - dl + 1, LocalDomain) == 0)
- f->f_host[hl-dl] = '\0';
- }
-
- /* 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 + 1;
- pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
- } else {
- pri = decode(buf, prioritynames);
- if (pri < 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) {
- (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++;
-
- switch (*p) {
- case '@':
- port = (char *)p;
- p = strsep(&port, ":");
- (void)strlcpy(f->f_un.f_forw.f_hname, ++p,
- sizeof(f->f_un.f_forw.f_hname));
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = family;
- hints.ai_socktype = SOCK_DGRAM;
- error = getaddrinfo(f->f_un.f_forw.f_hname, port ? port : "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 '/':
- /* Delay opening files until we're ready to log to them */
- f->f_file = -1;
- if (strncmp(p, _PATH_DEV, sizeof(_PATH_DEV)-1) == 0)
- f->f_type = F_CHECKTTY;
- else
- f->f_type = F_FILE;
- (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
- break;
-
- case '|':
- f->f_un.f_pipe.f_pid = 0;
- (void)strlcpy(f->f_un.f_fname, p + 1, sizeof(f->f_un.f_fname));
- 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, UT_NAMESIZE);
- if ((q - p) > UT_NAMESIZE)
- f->f_un.f_uname[i][UT_NAMESIZE] = '\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, CODE *codetab)
-{
- 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 (MarkInterval && (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 )
-{
- 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, i;
- struct addrinfo hints, *res;
- struct in_addr *addrp, *maskp;
- u_int32_t *addr6p, *mask6p;
- 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 | withscopeid);
- printf("addr = %s, ", ip);
- getnameinfo((struct sockaddr *)&ap.a_mask,
- ((struct sockaddr *)&ap.a_mask)->sa_len,
- ip, sizeof ip, NULL, 0,
- NI_NUMERICHOST | withscopeid);
- 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, j, reject;
- 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;
- struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
- 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 | withscopeid | 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;
-#ifdef NI_WITHSCOPEID
- 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;
- }
-#endif
- 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 *pid)
-{
- int pfd[2], nulldesc, i;
- 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:
- /* XXX should check for NULL return */
- 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);
- for (i = getdtablesize(); i > 2; i--)
- (void)close(i);
-
- (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);
- }
- 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, const char *bindhostname)
-{
- struct addrinfo hints, *res, *r;
- int error, maxs, *s, *socks;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_flags = AI_PASSIVE;
- hints.ai_family = af;
- hints.ai_socktype = SOCK_DGRAM;
- error = getaddrinfo(bindhostname, "syslog", &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) {
- *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
- if (*s < 0) {
- logerror("socket");
- continue;
- }
- if (r->ai_family == AF_INET6) {
- int on = 1;
- if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
- (char *)&on, sizeof (on)) < 0) {
- logerror("setsockopt");
- close(*s);
- continue;
- }
- }
- if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
- close(*s);
- logerror("bind");
- continue;
- }
-
- (*socks)++;
- s++;
- }
-
- if (*socks == 0) {
- free(socks);
- if (Debug)
- return (NULL);
- else
- die(0);
- }
- if (res)
- freeaddrinfo(res);
-
- return (socks);
-}
projects / apple / network_cmds.git / blobdiff