home *** CD-ROM | disk | FTP | other *** search
- #ifndef lint
- static char sccsid[] = "@(#)syslogd.c";
- #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.
- * NLOGS -- the maximum number of simultaneous log files.
- * DEFUPRI -- the default priority for user messages
- * DEFSPRI -- the default priority for kernel messages
- *
- */
-
- #define NLOGS 20 /* max number of log files */
- #define MAXLINE 1024 /* maximum line length */
- #define DEFUPRI (LOG_USER|LOG_NOTICE)
- #define DEFSPRI (LOG_KERN|LOG_CRIT)
- #define MARKCOUNT 10 /* ratio of minor to major marks */
-
- #include <errno.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <utmp.h>
- #include <ctype.h>
- #include <signal.h>
- #include <sysexits.h>
- #include <string.h>
-
- #include <sys/syslog.h>
- #include <sys/param.h>
- #include <sys/ioctl.h>
- #include <sys/stat.h>
- #include <sys/file.h>
- #include <sys/uio.h>
- #include <sys/time.h>
- #include <sys/socket.h>
-
- typedef int (*sighand)();
-
- char *LogName = "/dev/log";
- char *ConfFile = "/etc/syslog.conf";
- char *PidFile = "/etc/syslog.pid";
- char ctty[] = "/dev/tty0";
-
- #define FDMASK(fd) (1 << (fd))
-
- /*
- * defines for BSD compat....I think!
- */
-
- #define index(a, b) strchr(a, b)
- #define bzero(a, b) memset(a, '\0', b)
-
-
- #define dprintf if (Debug) printf
-
- #define UNAMESZ 8 /* length of a login name */
- #define MAXUNAMES 20 /* maximum number of user names */
- #define MAXFNAME 200 /* max file pathname length */
-
- #define NOPRI 0x10 /* the "no priority" priority */
- #define LOG_MARK (LOG_NFACILITIES << 3) /* mark "facility" */
-
- /*
- * Flags to logmsg().
- */
-
- #define IGN_CONS 0x001 /* don't print on console */
- #define SYNC_FILE 0x002 /* do fsync on file after printing */
- #define NOCOPY 0x004 /* don't suppress duplicate messages */
- #define ADDDATE 0x008 /* add a date to the message */
- #define MARK 0x010 /* this message is a mark */
-
- /*
- * This structure represents the files that will have log
- * copies printed.
- */
-
- struct filed {
- short f_type; /* entry type, see below */
- short f_file; /* file descriptor */
- time_t f_time; /* time this was last written */
- u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
- union {
- char f_uname[MAXUNAMES][UNAMESZ+1];
- char f_fname[MAXFNAME];
- } f_un;
- };
-
- /* 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 */
-
- /* how often (in seconds) to check for more input */
- #define GRANULARITY 10
- #define MSG_BSIZE 1024
-
- char *TypeNames[7] = {
- "UNUSED", "FILE", "TTY", "CONSOLE",
- "FORW", "USERS", "WALL"
- };
-
- struct filed Files[NLOGS];
-
- int Debug; /* debug flag */
- char LocalHostName[MAXHOSTNAMELEN+1]; /* our hostname */
- char *LocalDomain; /* our local domain name */
- int InetInuse = 0; /* non-zero if INET sockets are being used */
- int LogPort; /* port number for INET connections */
- char PrevLine[MAXLINE + 1]; /* copy of last line to supress repeats */
- char PrevHost[MAXHOSTNAMELEN+1]; /* previous host */
- int PrevFlags;
- int PrevPri;
- int PrevCount = 0; /* number of times seen */
- int Initialized = 0; /* set when we have initialized ourselves */
- int MarkInterval = 20; /* interval between marks in minutes */
- int MarkSeq = 0; /* mark sequence number */
- int Gran = 0;
- static int mask = 0;
- int count;
- int readfds;
-
- extern int errno, sys_nerr;
- extern char *sys_errlist[];
- extern char *ctime();
- /* extern char *index(); */
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- register int i;
- register char *p;
- static int funix;
- int len, nlen, ns, nfds;
- struct sockaddr afunix, fromunix;
- int fd;
- FILE *fp;
- char *lp, *lpb;
- char errbuf[100];
- char line[MSG_BSIZE + 1];
- extern int die(), domark();
-
- while (--argc > 0) {
- p = *++argv;
- if (p[0] != '-')
- usage();
- switch (p[1]) {
- case 'f': /* configuration file */
- if (p[2] != '\0')
- ConfFile = &p[2];
- break;
-
- case 'd': /* debug */
- Debug++;
- break;
-
- case 'p': /* path */
- if (p[2] != '\0')
- LogName = &p[2];
- break;
-
- case 'm': /* mark interval */
- if (p[2] != '\0')
- MarkInterval = atoi(&p[2]);
- break;
-
- default:
- usage();
- }
- }
-
- if (!Debug) {
- if (fork())
- exit(0);
- for (i = 0; i < 10; i++)
- close(i);
- open("/", 0);
- dup2(0, 1);
- dup2(0, 2);
- untty();
- } else
- #ifdef linux
- ;
- #else
- setlinebuf(stdout);
- #endif
- gethostname(LocalHostName, sizeof LocalHostName);
- if (p = index(LocalHostName, '.')) {
- *p++ = '\0';
- LocalDomain = p;
- }
- else
- LocalDomain = "";
- signal(SIGTERM, (void *) die);
- signal(SIGINT, Debug ? (void *) die : SIG_IGN);
- signal(SIGQUIT, Debug ? (void *) die : SIG_IGN);
- unlink(LogName);
- /*
- * create system logfile LogName mode 0666
- * logerror and die if can't
- */
-
- funix = socket(AF_UNIX, SOCK_STREAM, 0);
- if (funix < 0) {
- logerror("unable to create socket");
- die(0);
- }
- afunix.sa_family = AF_UNIX;
- strcpy(afunix.sa_data, LogName);
- if (bind(funix, &afunix, sizeof(afunix)) < 0) {
- logerror("can't bind");
- die(0);
- }
- chmod(LogName, 0666);
-
- /* tuck my process id away */
- fp = fopen(PidFile, "w");
- if (fp != NULL) {
- fprintf(fp, "%d\n", getpid());
- fclose(fp);
- }
-
- dprintf("off & running....\n");
-
- init();
- signal(SIGHUP, (void *) init);
- signal(SIGALRM, (void *) domark);
-
- if (listen(funix, 5) < 0) {
- perror("listen");
- exit(1);
- }
-
- alarm(MarkInterval * 60 / MARKCOUNT);
-
- for (;;) {
- errno = 0;
- /*
- * Change this so it only reads one line at a time
- * otherwise if more than BUFSIZ messages are read
- * we'll get lost---also reading char at a time would
- * help us catch messages that are being written while
- * we run .... oh for an atomic flock
- */
-
- readfds = FDMASK(funix) | mask;
- errno = 0;
- nfds = select(20, (fd_set *) &readfds, (fd_set *) NULL,
- (fd_set *) NULL, (struct timeval *) NULL);
- count++;
- if (nfds == 0)
- continue;
- if (nfds < 0) {
- if (errno != EINTR)
- perror("select");
- continue;
- }
- if (readfds & (FDMASK(funix) | mask)) {
- len = sizeof fromunix;
- if ((i = recvfrom(funix, line, MSG_BSIZE, 0,
- (struct sockaddr *) &fromunix, &len)) > 0) {
- line[i]='\0';
- printline(LocalHostName, line);
- } else {
- if ((errno == EAGAIN) || (errno == 0)) continue;
- sprintf(errbuf, "recvfrom unix %d: %s", errno, strerror(errno));
- logerror(errbuf);
- }
- } else {
- if (errno != EINTR) {
- logerror("accept failure");
- die(0);
- }
- }
- }
- }
-
- usage()
- {
- fprintf(stderr, "usage: syslogd [-d] [-mmarkinterval] [-ppath] [-fconffile]\n");
- exit(1);
- }
-
- untty()
- {
- int i;
-
- if (!Debug) {
- #ifdef linux
- setpgrp();
- #endif
- i = open("/dev/tty", O_RDWR);
- if (i >= 0) {
- #ifndef linux
- ioctl(i, (int) TIOCNOTTY, (char *)0);
- #endif linux
- close(i);
- }
- }
- }
-
- /*
- * Take a raw input line, decode the message, and print the message
- * on the appropriate log files.
- */
-
- printline(hname, msg)
- char *hname;
- char *msg;
- {
- register char *p, *q;
- register int c;
- char line[MAXLINE + 1];
- int pri;
-
- /* 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 <= 0 || pri >= (LOG_NFACILITIES << 3))
- pri = DEFUPRI;
- }
-
- /* don't allow users to log kernel messages */
- if ((pri & LOG_PRIMASK) == LOG_KERN)
- pri |= LOG_USER;
-
- q = line;
-
- while ((c = *p++ & 0177) != '\0' && c != '\n' &&
- q < &line[sizeof(line) - 1]) {
- if (iscntrl(c)) {
- *q++ = '^';
- *q++ = c ^ 0100;
- } else
- *q++ = c;
- }
- *q = '\0';
-
- logmsg(pri, line, hname, 0);
- }
-
-
- /*
- * Log a message to the appropriate log files, users, etc. based on
- * the priority.
- */
-
- logmsg(pri, msg, from, flags)
- int pri;
- char *msg, *from;
- int flags;
- {
- register struct filed *f;
- register int l;
- int fac, prilev;
- time_t now;
- int omask;
- sighand s1, s2;
- struct iovec iov[6];
- register struct iovec *v = iov;
- char line[MAXLINE + 1];
-
- dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", pri, flags, from, msg);
-
- s1 = signal(SIGHUP, SIG_IGN);
- s2 = signal(SIGALRM, SIG_IGN);
-
- /*
- * Check to see if msg looks non-standard.
- */
- if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
- msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
- flags |= ADDDATE;
-
- if (!(flags & NOCOPY)) {
- if (flags & (ADDDATE|MARK))
- flushmsg();
- else if (!strcmp(msg + 16, PrevLine + 16)) {
- /* we found a match, update the time */
- strncpy(PrevLine, msg, 15);
- PrevCount++;
- signal(SIGHUP, (void *) s1);
- signal(SIGALRM, (void *) s2);
- return;
- } else {
- /* new line, save it */
- flushmsg();
- strcpy(PrevLine, msg);
- strcpy(PrevHost, from);
- PrevFlags = flags;
- PrevPri = pri;
- }
- }
-
- time(&now);
- if (flags & ADDDATE)
- v->iov_base = ctime(&now) + 4;
- else
- v->iov_base = msg;
- v->iov_len = 15;
- v++;
- v->iov_base = " ";
- v->iov_len = 1;
- v++;
- v->iov_base = from;
- v->iov_len = strlen(v->iov_base);
- v++;
- v->iov_base = " ";
- v->iov_len = 1;
- v++;
- if (flags & ADDDATE)
- v->iov_base = msg;
- else
- v->iov_base = msg + 16;
- v->iov_len = strlen(v->iov_base);
- v++;
-
- /* extract facility and priority level */
- fac = (pri & LOG_FACMASK) >> 3;
- if (flags & MARK)
- fac = LOG_NFACILITIES;
- prilev = pri & LOG_PRIMASK;
-
- /* log the message to the particular outputs */
- if (!Initialized) {
- int cfd = open(ctty, O_WRONLY);
-
- if (cfd >= 0) {
- v->iov_base = "\r\n";
- v->iov_len = 2;
- writev(cfd, iov, 6);
- close(cfd);
- }
- untty();
- signal(SIGHUP, (void *) s1);
- signal(SIGALRM, (void *) s2);
- return;
- }
- for (f = Files; f < &Files[NLOGS]; f++) {
- /* skip messages that are incorrect priority */
- if (f->f_pmask[fac] < prilev || f->f_pmask[fac] == NOPRI)
- continue;
-
- /* don't output marks to recently written files */
- if ((flags & MARK) && (now - f->f_time) < (MarkInterval * 60 / 2))
- continue;
-
- 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("Forward (unsupported)\n");
- break;
-
- case F_CONSOLE:
- if (flags & IGN_CONS) {
- dprintf(" (ignored)\n");
- break;
- }
-
- case F_TTY:
- case F_FILE:
- dprintf(" %s\n", f->f_un.f_fname);
- if (f->f_type != F_FILE) {
- v->iov_base = "\r\n";
- v->iov_len = 2;
- } else {
- v->iov_base = "\n";
- v->iov_len = 1;
- }
- if (writev(f->f_file, iov, 6) < 0) {
- int e = errno;
- close(f->f_file);
- /*
- * Check for EBADF on TTY's due to vhangup() XXX
- */
- if (e == EBADF && f->f_type != F_FILE) {
- f->f_file = open(f->f_un.f_fname, O_WRONLY|O_APPEND);
- if (f->f_file < 0) {
- f->f_type = F_UNUSED;
- logerror(f->f_un.f_fname);
- }
- } else {
- f->f_type = F_UNUSED;
- errno = e;
- logerror(f->f_un.f_fname);
- }
- } else if (flags & SYNC_FILE)
- #ifndef linux
- fsync(f->f_file);
- #else
- sync();
- #endif
- break;
-
- case F_USERS:
- case F_WALL:
- dprintf("\n");
- v->iov_base = "\r\n";
- v->iov_len = 2;
- wallmsg(f, iov);
- break;
- }
- }
- signal(SIGHUP, (void *) s1);
- signal(SIGALRM, (void *) s2);
- }
-
-
- /*
- * WALLMSG -- Write a message to the world at large
- *
- * Write the specified message to either the entire
- * world, or a list of approved users.
- */
-
- wallmsg(f, iov)
- register struct filed *f;
- struct iovec *iov;
- {
- register char *p;
- register int i;
- int ttyf, len, pid, wstat, xpid;
- FILE *uf;
- static int reenter = 0;
- struct utmp ut;
- time_t now;
- char greetings[200];
-
- if (reenter++)
- return;
-
- /* open the user login file */
- if ((uf = fopen("/etc/utmp", "r")) == NULL) {
- logerror("/etc/utmp");
- reenter = 0;
- return;
- }
-
- time(&now);
- sprintf(greetings,
- "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
- iov[2].iov_base, ctime(&now));
- len = strlen(greetings);
-
- /* scan the user login file */
- xpid = 0;
- while (fread((char *) &ut, sizeof ut, 1, uf) == 1) {
- /* is this slot used? */
- if (ut.ut_name[0] == '\0')
- continue;
-
- /* should we send the message to this user? */
- if (f->f_type == F_USERS) {
- for (i = 0; i < MAXUNAMES; i++) {
- if (!f->f_un.f_uname[i][0]) {
- i = MAXUNAMES;
- break;
- }
- if (strncmp(f->f_un.f_uname[i], ut.ut_name,
- UNAMESZ) == 0)
- break;
- }
- if (i >= MAXUNAMES)
- continue;
- }
-
- /* compute the device name */
- p = "/dev/12345678";
- strncpy(&p[5], ut.ut_line, UNAMESZ);
-
- /*
- * Might as well instead of using nonblocking I/O
- * and doing notty().
- */
- pid = fork();
- /* if (pid != 0) {
- while ((xpid = wait(&wstat)) != pid) {
- if (xpid == -1)
- break;
- }
- } else
- */ if (pid == 0) {
- if (f->f_type == F_WALL) {
- iov[0].iov_base = greetings;
- iov[0].iov_len = len;
- iov[1].iov_len = 0;
- }
- signal(SIGALRM, SIG_DFL);
- alarm(30);
- /* open the terminal */
- ttyf = open(p, O_WRONLY);
- if (ttyf >= 0)
- writev(ttyf, iov, 6);
- exit(0);
- }
- }
- /* close the user login file */
- fclose(uf);
- while ((xpid = wait(&wstat)) != -1) ;
- reenter = 0;
- }
-
-
- domark()
- {
- int pri;
-
- if ((++MarkSeq % MARKCOUNT) == 0)
- logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK);
- else
- flushmsg();
- signal(SIGALRM, (void *) domark);
- alarm(MarkInterval * 60 / MARKCOUNT);
- }
-
- flushmsg()
- {
- if (PrevCount == 0)
- return;
- if (PrevCount > 1)
- sprintf(PrevLine+16, "last message repeated %d times", PrevCount);
- PrevCount = 0;
- logmsg(PrevPri, PrevLine, PrevHost, PrevFlags|NOCOPY);
- PrevLine[0] = '\0';
- }
-
- /*
- * Print syslogd errors some place.
- */
- logerror(type)
- char *type;
- {
- char buf[100];
-
- if (errno == 0)
- sprintf(buf, "syslogd: %s", type);
- else if ((unsigned) errno > sys_nerr)
- sprintf(buf, "syslogd: %s: error %d", type, errno);
- else
- sprintf(buf, "syslogd: %s: %s", type, sys_errlist[errno]);
- errno = 0;
- dprintf("%s\n", buf);
- logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
- }
-
- die(sig)
- {
- char buf[100];
-
- if (sig) {
- dprintf("syslogd: going down on signal %d\n", sig);
- flushmsg();
- sprintf(buf, "going down on signal %d", sig);
- logerror(buf);
- }
- unlink(LogName);
- exit(0);
- }
-
- /*
- * INIT -- Initialize syslogd from configuration table
- */
-
- init()
- {
- register int i;
- register FILE *cf;
- register struct filed *f;
- register char *p;
- char cline[BUFSIZ];
-
- dprintf("init\n");
-
- /* flush any pending output */
- flushmsg();
-
- /*
- * Close all open log files.
- */
- for (f = Files; f < &Files[NLOGS]; f++) {
- if (f->f_type == F_FILE || f->f_type == F_TTY)
- close(f->f_file);
- f->f_type = F_UNUSED;
- }
-
- /* open the configuration file */
- if ((cf = fopen(ConfFile, "r")) == NULL) {
- dprintf("cannot open %s\n", ConfFile);
- cfline("*.ERR\t/dev/tty0", &Files[0]);
- cfline("*.PANIC\t*", &Files[1]);
- return;
- }
-
- /*
- * Foreach line in the conf table, open that file.
- */
- f = Files;
- while (fgets(cline, sizeof cline, cf) != NULL && f < &Files[NLOGS]) {
- /* check for end-of-section */
- if (cline[0] == '\n' || cline[0] == '#')
- continue;
-
- /* strip off newline character */
- p = index(cline, '\n');
- if (p)
- *p = '\0';
-
- cfline(cline, f++);
- }
-
- /* close the configuration file */
- fclose(cf);
-
- Initialized = 1;
-
- if (Debug) {
- for (f = Files; f < &Files[NLOGS]; f++) {
- for (i = 0; i <= LOG_NFACILITIES; i++)
- if (f->f_pmask[i] == NOPRI)
- printf("X ");
- else
- printf("%d ", f->f_pmask[i]);
- printf("%s: ", TypeNames[f->f_type]);
- switch (f->f_type) {
- case F_FILE:
- case F_TTY:
- case F_CONSOLE:
- printf("%s", f->f_un.f_fname);
- break;
-
- case F_FORW:
- 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;
- }
- printf("\n");
- }
- }
-
- logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
- dprintf("syslogd: restarted\n");
- }
-
- /*
- * Crack a configuration file line
- */
-
- struct code {
- char *c_name;
- int c_val;
- };
-
- struct code PriNames[] = {
- "panic", LOG_EMERG,
- "emerg", LOG_EMERG,
- "alert", LOG_ALERT,
- "crit", LOG_CRIT,
- "err", LOG_ERR,
- "error", LOG_ERR,
- "warn", LOG_WARNING,
- "warning", LOG_WARNING,
- "notice", LOG_NOTICE,
- "info", LOG_INFO,
- "debug", LOG_DEBUG,
- "none", NOPRI,
- NULL, -1
- };
-
- struct code FacNames[] = {
- "kern", LOG_KERN,
- "user", LOG_USER,
- "mail", LOG_MAIL,
- "daemon", LOG_DAEMON,
- "auth", LOG_AUTH,
- "security", LOG_AUTH,
- "mark", LOG_MARK,
- "syslog", LOG_SYSLOG,
- "lpr", LOG_LPR,
- "local0", LOG_LOCAL0,
- "local1", LOG_LOCAL1,
- "local2", LOG_LOCAL2,
- "local3", LOG_LOCAL3,
- "local4", LOG_LOCAL4,
- "local5", LOG_LOCAL5,
- "local6", LOG_LOCAL6,
- "local7", LOG_LOCAL7,
- NULL, -1
- };
-
- cfline(line, f)
- char *line;
- register struct filed *f;
- {
- register char *p;
- register char *q;
- register int i;
- char *bp;
- int pri;
- struct hostent *hp;
- char buf[MAXLINE];
-
- dprintf("cfline(%s)\n", line);
-
- /* clear out file entry */
- bzero((char *) f, sizeof *f);
- for (i = 0; i <= LOG_NFACILITIES; i++)
- f->f_pmask[i] = NOPRI;
-
- /* scan through the list of selectors */
- for (p = line; *p && *p != '\t';) {
-
- /* find the end of this facility name list */
- for (q = p; *q && *q != '\t' && *q++ != '.'; )
- continue;
-
- /* collect priority name */
- for (bp = buf; *q && !index("\t,;", *q); )
- *bp++ = *q++;
- *bp = '\0';
-
- /* skip cruft */
- while (index(", ;", *q))
- q++;
-
- /* decode priority name */
- pri = decode(buf, PriNames);
- if (pri < 0) {
- char xbuf[200];
-
- sprintf(xbuf, "unknown priority name \"%s\"", buf);
- logerror(xbuf);
- return;
- }
-
- /* scan facilities */
- while (*p && !index("\t.;", *p)) {
- int i;
-
- for (bp = buf; *p && !index("\t,;.", *p); )
- *bp++ = *p++;
- *bp = '\0';
- if (*buf == '*')
- for (i = 0; i < LOG_NFACILITIES; i++)
- f->f_pmask[i] = pri;
- else {
- i = decode(buf, FacNames);
- if (i < 0) {
- char xbuf[200];
-
- sprintf(xbuf, "unknown facility name \"%s\"", buf);
- logerror(xbuf);
- return;
- }
- f->f_pmask[i >> 3] = pri;
- }
- while (*p == ',' || *p == ' ')
- p++;
- }
-
- p = q;
- }
-
- /* skip to action part */
- while (*p == '\t')
- p++;
-
- fprintf(stderr, "syslogd: cfline on %s\n", p);
-
- switch (*p)
- {
- case '@':
- if (!InetInuse)
- break;
- strcpy(f->f_un.f_uname, ++p);
-
- f->f_type = F_FORW;
- break;
-
- case '/':
- strcpy(f->f_un.f_fname, p);
- if ((f->f_file = open(p, O_WRONLY|O_APPEND)) < 0) {
- logerror(p);
- break;
- }
-
- if (isatty(f->f_file)) {
- f->f_type = F_TTY;
- untty();
- }
- else
- f->f_type = F_FILE;
- if (strcmp(p, ctty) == 0)
- f->f_type = F_CONSOLE;
- break;
-
- case '*':
- f->f_type = F_WALL;
- break;
-
- default:
- for (i = 0; i < MAXUNAMES && *p; i++) {
- for (q = p; *q && *q != ','; )
- q++;
- strncpy(f->f_un.f_uname[i], p, UNAMESZ);
- if ((q - p) > UNAMESZ)
- f->f_un.f_uname[i][UNAMESZ] = '\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
- */
-
- decode(name, codetab)
- char *name;
- struct code *codetab;
- {
- register struct code *c;
- register char *p;
- char buf[40];
-
- if (isdigit(*name))
- return (atoi(name));
-
- strcpy(buf, name);
- for (p = buf; *p; p++)
- if (isupper(*p))
- *p = tolower(*p);
- for (c = codetab; c->c_name; c++)
- if (!strcmp(buf, c->c_name))
- return (c->c_val);
-
- return (-1);
- }
-
- readline(fd, s, size)
- int fd;
- char *s;
- int size;
- {
- int c, i, j;
- static long cur_pos;
- struct stat st;
-
- fstat(fd, &st);
- if (cur_pos < st.st_size) {
- i = 0; j = 0;
- do {
- j = read(fd, &c, 1);
- *s++ = c;
- i++;
- } while (j > 0 && c != '\n');
- cur_pos = lseek(fd, 0L, 1);
- return(i);
- }
- return(0);
- }
-
- int
- recvfrom(s, buf, buflen, flags, sock, socklen)
- int s, buflen, flags;
- char *buf;
- struct sockaddr *sock;
- int *socklen;
- {
- int i, fd, nfds, cc;
- long newmask;
-
- /* check for dead connections */
-
- /* I think this is done below now */
-
- /* check for data on current connections and return */
-
- if (mask | FDMASK(s)) {
- newmask = mask | FDMASK(s);
- nfds = select(20, (fd_set *) &newmask, (fd_set *) NULL,
- (fd_set *) NULL, (struct timeval *) NULL);
-
- fd = 0;
- while (nfds > 0) {
- /* accept new connection and read data */
-
- if (newmask & FDMASK(s)) {
- listen(s, 5);
- fd = accept(s, sock, socklen);
- if (fd < 0) {
- return -1;
- }
- mask |= FDMASK(fd);
- fcntl(fd, F_SETFL, O_NONBLOCK);
- cc = read(fd, buf, buflen);
- return(cc);
- } else {
- while (!(newmask & 1)) {
- newmask = newmask >> 1;
- fd++;
- }
- cc = read(fd, buf, buflen);
- if (cc <= 0) {
- mask ^= FDMASK(fd);
- newmask = newmask >> 1;
- close(fd);
- fd++;
- nfds--;
- } else {
- return(cc);
- }
- }
- }
- }
- }
-
-