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inetd10.zip
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INETD.C
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1995-04-04
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/*
* Copyright (c) 1983,1991 The Regents of the University of California.
* All rights reserved.
*
* Hacks for OS/2 by Jochen Friedrich <jochen@audio.pfalz.de>
*
* 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.
*/
/*
* Inetd - Internet super-server
*
* This program invokes all internet services as needed.
* connection-oriented services are invoked each time a
* connection is made, by creating a process. This process
* is passed the connection as file descriptor 0 and is
* expected to do a getpeername to find out the source host
* and port.
*
* Datagram oriented services are invoked when a datagram
* arrives; a process is created and passed a pending message
* on file descriptor 0. Datagram servers may either connect
* to their peer, freeing up the original socket for inetd
* to receive further messages on, or ``take over the socket'',
* processing all arriving datagrams and, eventually, timing
* out. The first type of server is said to be ``multi-threaded'';
* the second type of server ``single-threaded''.
*
* Inetd uses a configuration file which is read at startup
* and, possibly, at some later time in response to a hangup signal.
* The configuration file is ``free format'' with fields given in the
* order shown below. Continuation lines for an entry must being with
* a space or tab. All fields must be present in each entry.
*
* service name must be in /etc/services
* socket type stream/dgram
* protocol must be in /etc/protocols
* wait/nowait single-threaded/multi-threaded
* user user to run daemon as
* server program full path name
* server program arguments maximum of MAXARGS (20)
*
* Comment lines are indicated by a `#' in column 1.
*/
#define INCL_DOS
#define INCL_BASE
#define INCL_DOSEXCEPTIONS
#include <os2.h>
#include <malloc.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <errno.h>
#include <nerrno.h>
#include <direct.h>
#include <process.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <types.h>
#include "syslog.h"
#include "pwd.h"
#include "fix_env.h"
#define TOOMANY 40 /* don't start more than TOOMANY */
#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
#define RETRYTIME (60*10) /* retry after bind or server fail */
#define MAXSOCK 256
void config(int);
void reapchild(void *);
void retry(void *);
struct servtab *getconfigent(void);
struct servtab *enter(struct servtab *);
void echo_stream(int*);
void discard_stream(int*);
void machtime_stream(int*);
void daytime_stream(int*);
void chargen_stream(int*);
void echo_dg(int*);
void discard_dg(int*);
void machtime_dg(int*);
void daytime_dg(int*);
void chargen_dg(int*);
void setup(struct servtab *);
char *skip(char **);
char *nextline(FILE *);
void endconfig(void);
void freeconfig(struct servtab *);
void print_service(char *, struct servtab *);
int fd_isset(int, int *, int);
void fd_set(int, int *, int *);
void fd_clr(int, int *, int *);
int retrytime = RETRYTIME;
int debug = 0;
int nsock, maxsock;
int allsock[MAXSOCK];
int options;
int timingout;
int cansock;
int reapthread;
ULONG reapsem;
struct servent *sp;
char userenv[1024];
struct servtab {
char *se_service; /* name of service */
int se_socktype; /* type of socket to use */
char *se_proto; /* protocol used */
short se_wait; /* single threaded server */
short se_checked; /* looked at during merge */
char *se_user; /* user name to run as */
struct biltin *se_bi; /* if built-in, description */
char *se_server; /* server program */
#define MAXARGV 20
char *se_argv[MAXARGV+1]; /* program arguments */
int se_fd; /* open descriptor */
int se_sock; /* descriptor for stream */
struct sockaddr_in se_ctrladdr;/* bound address */
int se_count; /* number started since se_time */
struct timeval se_time; /* start of se_count */
struct servtab *se_next;
} *servtab;
struct biltin {
char *bi_service; /* internally provided service name */
int bi_socktype; /* type of socket supported */
short bi_fork; /* 1 if should fork before call */
short bi_wait; /* 1 if should wait for child */
void (* _Optlink bi_fn)(int*); /* function which performs it */
} biltins[] = {
/* Echo received data */
"echo", SOCK_STREAM, 1, 0, echo_stream,
"echo", SOCK_DGRAM, 0, 0, echo_dg,
/* Internet /dev/null */
"discard", SOCK_STREAM, 1, 0, discard_stream,
"discard", SOCK_DGRAM, 0, 0, discard_dg,
/* Return 32 bit time since 1970 */
"time", SOCK_STREAM, 0, 0, machtime_stream,
"time", SOCK_DGRAM, 0, 0, machtime_dg,
/* Return human-readable time */
"daytime", SOCK_STREAM, 0, 0, daytime_stream,
"daytime", SOCK_DGRAM, 0, 0, daytime_dg,
/* Familiar character generator */
"chargen", SOCK_STREAM, 1, 0, chargen_stream,
"chargen", SOCK_DGRAM, 0, 0, chargen_dg,
0
};
#define NUMINT (sizeof(intab) / sizeof(struct inent))
char CONFIG[255] = "c:\\etc\\inetd.cnf";
char **Argv;
char *LastArg;
int main(int argc, char *argv[], char *envp[])
{
extern char *optarg;
extern int optind;
register struct servtab *sep;
register int tmpint;
int ch, pid, dofork;
char buf[50];
char *wdir;
struct passwd *pass;
if (sock_init()) {
fprintf(stderr,"Can't initialize TCP/IP");
exit(-1);
}
if (!(cansock = socket(AF_INET, SOCK_STREAM, 0))) {
fprintf(stderr,"Can't open sync socket");
exit(-1);
}
fix_env(CONFIG,"ETC");
Argv = argv;
if (envp == 0 || *envp == 0)
envp = argv;
while (*envp)
envp++;
LastArg = envp[-1] + strlen(envp[-1]);
while ((ch = getopt(argc, argv, "d")) != EOF)
switch(ch) {
case 'd':
debug = 1;
options |= SO_DEBUG;
break;
case '?':
default:
fprintf(stderr, "usage: inetd [-d]");
exit(1);
}
argc -= optind;
argv += optind;
if (argc > 0)
strcpy(CONFIG,argv[0]);
openlog("inetd", LOG_PID | LOG_NOWAIT, LOG_DAEMON);
config(0);
if (DosCreateEventSem(NULL, &reapsem, 0L, FALSE)) {
fprintf(stderr,"Can't create semaphore");
exit(-1);
}
if (!( reapthread = _beginthread(reapchild, NULL, 8192, NULL))) {
fprintf(stderr,"Can't create thread for reap");
exit(-1);
}
for (;;) {
int n;
int readable[257];
for(n=0;n<nsock;n++) readable[n] = allsock[n];
readable[nsock]=cansock;
if (debug)
fprintf(stderr, "enter select with %d sockets\n",nsock);
if ((n = select(readable, nsock, 0, 1, -1L)) <= 0) {
errno = sock_errno();
if (n < 0 && errno != SOCEINTR) {
syslog(LOG_WARNING, "select: %m\n");
DosSleep(1000);
}
continue;
}
for (sep = servtab; n && sep; sep = sep->se_next) {
if (sep->se_fd != -1 && fd_isset(sep->se_fd, readable, nsock)) {
n--;
if (debug)
fprintf(stderr, "someone wants %s\n",
sep->se_service);
if (sep->se_socktype == SOCK_STREAM) {
sep->se_sock = accept(sep->se_fd, (struct sockaddr *)0,
(int *)0);
errno = sock_errno();
if (debug)
fprintf(stderr, "accept, socket %d\n", sep->se_sock);
if (sep->se_sock < 0) {
if (errno == SOCEINTR)
continue;
syslog(LOG_WARNING, "accept (for %s): %m",
sep->se_service);
continue;
}
} else
sep->se_sock = sep->se_fd;
dofork = (sep->se_bi == 0 || sep->se_bi->bi_fork);
if (dofork) {
if (sep->se_count++ == 0)
gettimeofday(&sep->se_time,
(struct timezone *)0);
else if (sep->se_count >= TOOMANY) {
struct timeval now;
gettimeofday(&now, (struct timezone *)0);
if (now.tv_sec - sep->se_time.tv_sec >
CNT_INTVL) {
sep->se_time = now;
sep->se_count = 1;
} else {
syslog(LOG_ERR,
"%s/%s server failing (looping), service terminated\n",
sep->se_service, sep->se_proto);
fd_clr(sep->se_fd, allsock, &nsock);
soclose(sep->se_fd);
sep->se_fd = -1;
sep->se_count = 0;
if (!timingout) {
timingout = 1;
_beginthread(retry,NULL,32768,&retrytime);
}
}
}
}
pid=0;
if (sep->se_bi) {
int *ctrl;
ctrl=malloc(sizeof(int));
*ctrl=sep->se_sock;
if (dofork)
_beginthread( (void(*)(void*)) (sep->se_bi->bi_fn),NULL,32768,ctrl);
else
(*sep->se_bi->bi_fn)(ctrl);
}
else {
char* argv[MAXARGV+1];
int i;
char socknum[10];
sprintf(socknum,"%d",sep->se_sock);
if (debug)
fprintf(stderr, "%d execl %s\n",
getpid(), sep->se_server);
for (i=0;i<=MAXARGV;i++)
if ((sep->se_argv[i])&&(strcmp(sep->se_argv[i],"%s")==0))
argv[i]=socknum;
else
argv[i]=sep->se_argv[i];
DosSuspendThread(reapthread);
sprintf(userenv,"LOGNAME=%s",sep->se_user);
putenv(userenv);
if ((wdir = getenv("ETC")) == NULL) wdir = "c:\\etc";
pass = getpwnam(sep->se_user);
if (pass && pass->pw_dir) wdir = pass->pw_dir;
chdir(wdir);
if (wdir[1] == ':')
_chdrive(toupper(wdir[0])-'A'+1);
pid=spawnvp(P_NOWAIT, sep->se_server, argv);
if (pid) {
removesocketfromlist(sep->se_sock);
DosPostEventSem(reapsem);
}
if (pid && sep->se_wait) {
sep->se_wait = pid;
if (sep->se_fd >=0) {
fd_clr(sep->se_fd, allsock, &nsock);
}
}
DosResumeThread(reapthread);
}
}
}
}
}
int fd_isset(int sock, int arr[], int nsock)
{
int i=0;
while((i < nsock) && (arr[i]!=sock) && (i<MAXSOCK)) i++;
if (i==MAXSOCK) return 0;
if (i== nsock) return 0;
return 1;
}
void fd_set(int sock, int arr[], int *nsock)
{
int i=0;
if (*nsock>=MAXSOCK) return;
while((i < *nsock) && (arr[i]!=sock)) i++;
if (i!= *nsock) return;
arr[*nsock]=sock;
(*nsock)++;
}
void fd_clr(int sock, int arr[], int *nsock)
{
int i=0;
if (*nsock==0) return;
while((i < *nsock) && (arr[i]!=sock) && (i<256)) i++;
if (i==256) return;
if (i == *nsock) return;
(*nsock)--;
while (i< *nsock)
{
arr[i]=arr[i+1];
i++;
}
}
void reapchild(void *dummy)
{
ULONG pid;
ULONG cnt;
RESULTCODES result;
register struct servtab *sep;
while(1) {
cnt = DosWaitChild(DCWA_PROCESS, DCWW_WAIT, &result, &pid, 0);
if (cnt) {
if (cnt == ERROR_WAIT_NO_CHILDREN) {
DosWaitEventSem(reapsem, -1L);
DosResetEventSem(reapsem,&cnt);
} else syslog(LOG_WARNING, "wait result 0x%x", errno);
} else {
if (debug)
fprintf(stderr, "%d reaped\n", pid);
for (sep = servtab; sep; sep = sep->se_next)
if (sep->se_wait == pid) {
if (result.codeResult)
syslog(LOG_WARNING,
"%s: exit status 0x%x",
sep->se_server, result.codeResult);
if (result.codeTerminate)
syslog(LOG_WARNING,
"%s: exit termination 0x%x",
sep->se_server, result.codeTerminate);
if (debug)
fprintf(stderr, "restored %s, fd %d\n",
sep->se_service, sep->se_fd);
fd_set(sep->se_fd,allsock, &nsock);
sep->se_wait = 1;
if (sep->se_socktype==SOCK_STREAM) {
so_cancel(sep->se_sock);
soclose(sep->se_sock);
}
so_cancel(cansock);
}
}
}
}
void config(int x)
{
register struct servtab *sep, *cp, **sepp;
if (!setconfig()) {
syslog(LOG_ERR, "%s: %m", CONFIG);
return;
}
for (sep = servtab; sep; sep = sep->se_next)
sep->se_checked = 0;
while (cp = getconfigent()) {
for (sep = servtab; sep; sep = sep->se_next)
if (strcmp(sep->se_service, cp->se_service) == 0 &&
strcmp(sep->se_proto, cp->se_proto) == 0 &&
(sep->se_socktype==cp->se_socktype))
break;
if (sep != 0) {
int i;
/*
* sep->se_wait may be holding the pid of a daemon
* that we're waiting for. If so, don't overwrite
* it unless the config file explicitly says don't
* wait.
*/
if (cp->se_bi == 0 &&
(sep->se_wait == 1 || cp->se_wait == 0))
sep->se_wait = cp->se_wait;
#define SWAP(a, b) { char *c = a; a = b; b = c; }
if (cp->se_user)
SWAP(sep->se_user, cp->se_user);
if (cp->se_server)
SWAP(sep->se_server, cp->se_server);
for (i = 0; i < MAXARGV; i++)
SWAP(sep->se_argv[i], cp->se_argv[i]);
freeconfig(cp);
if (debug)
print_service("REDO", sep);
} else {
sep = enter(cp);
if (debug)
print_service("ADD ", sep);
}
sep->se_checked = 1;
sp = getservbyname(sep->se_service, sep->se_proto);
if (sp == 0) {
syslog(LOG_ERR, "%s/%s: unknown service",
sep->se_service, sep->se_proto);
if (sep->se_fd != -1)
soclose(sep->se_fd);
sep->se_fd = -1;
continue;
}
if (sp->s_port != sep->se_ctrladdr.sin_port) {
bzero(&sep->se_ctrladdr, sizeof(struct sockaddr_in));
sep->se_ctrladdr.sin_family = AF_INET;
sep->se_ctrladdr.sin_port = sp->s_port;
if (sep->se_fd != -1)
soclose(sep->se_fd);
sep->se_fd = -1;
}
if (sep->se_fd == -1)
setup(sep);
}
endconfig();
/*
* Purge anything not looked at above.
*/
sepp = &servtab;
while (sep = *sepp) {
if (sep->se_checked) {
sepp = &sep->se_next;
continue;
}
*sepp = sep->se_next;
if (sep->se_fd != -1) {
fd_clr(sep->se_fd,allsock, &nsock);
soclose(sep->se_fd);
}
if (debug)
print_service("FREE", sep);
freeconfig(sep);
free((char *)sep);
}
signal(SIGINT, config);
}
void retry(void *time)
{
register struct servtab *sep;
DosSleep( (* (int*) time) * 1000);
for (sep = servtab; sep; sep = sep->se_next)
if (sep->se_fd == -1)
setup(sep);
timingout = 0;
}
void setup(struct servtab *sep)
{
int on = 1;
if ((sep->se_fd = socket(AF_INET, sep->se_socktype, 0)) < 0) {
errno = sock_errno();
syslog(LOG_ERR, "%s/%s: socket: %m",
sep->se_service, sep->se_proto);
return;
}
#define turnon(fd, opt) \
setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) &&
turnon(sep->se_fd, SO_DEBUG) < 0)
syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m");
if (turnon(sep->se_fd, SO_REUSEADDR) < 0)
syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
#undef turnon
if (bind(sep->se_fd, (struct sockaddr *)&sep->se_ctrladdr,
sizeof (sep->se_ctrladdr)) < 0) {
errno = sock_errno();
syslog(LOG_ERR, "%s/%s: bind: %m",
sep->se_service, sep->se_proto);
soclose(sep->se_fd);
sep->se_fd = -1;
if (!timingout) {
timingout = 1;
_beginthread(retry,NULL,8192,&retrytime);
}
return;
}
if (sep->se_socktype == SOCK_STREAM)
listen(sep->se_fd, 10);
fd_set(sep->se_fd, allsock, &nsock);
if (sep->se_fd > maxsock)
maxsock = sep->se_fd;
}
struct servtab *enter(struct servtab *cp)
{
register struct servtab *sep;
sep = (struct servtab *)malloc(sizeof (*sep));
if (sep == (struct servtab *)0) {
syslog(LOG_ERR, "Out of memory.");
exit(-1);
}
*sep = *cp;
sep->se_fd = -1;
sep->se_next = servtab;
servtab = sep;
return (sep);
}
FILE *fconfig = NULL;
struct servtab serv;
char line[256];
int setconfig(void)
{
if (fconfig != NULL) {
fseek(fconfig, 0L, 0);
return (1);
}
fconfig = fopen(CONFIG, "r");
return (fconfig != NULL);
}
void endconfig(void)
{
if (fconfig) {
(void) fclose(fconfig);
fconfig = NULL;
}
}
struct servtab * getconfigent(void)
{
register struct servtab *sep = &serv;
int argc;
char *cp, *arg, *newstr();
more:
while ((cp = nextline(fconfig)) && *cp == '#')
;
if (cp == NULL)
return ((struct servtab *)0);
sep->se_service = newstr(skip(&cp));
arg = newstr(skip(&cp));
if (strcmp(arg, "stream") == 0)
sep->se_socktype = SOCK_STREAM;
else if (strcmp(arg, "dgram") == 0)
sep->se_socktype = SOCK_DGRAM;
else
sep->se_socktype = -1;
free(arg);
sep->se_proto = newstr(skip(&cp));
arg = newstr(skip(&cp));
sep->se_wait = strcmp(arg, "wait") == 0;
free(arg);
sep->se_user = newstr(skip(&cp));
sep->se_server = newstr(skip(&cp));
if (strcmp(sep->se_server, "internal") == 0) {
register struct biltin *bi;
for (bi = biltins; bi->bi_service; bi++)
if (bi->bi_socktype == sep->se_socktype &&
strcmp(bi->bi_service, sep->se_service) == 0)
break;
if (bi->bi_service == 0) {
syslog(LOG_ERR, "internal service %s unknown\n",
sep->se_service);
goto more;
}
sep->se_bi = bi;
sep->se_wait = bi->bi_wait;
} else
sep->se_bi = NULL;
sep->se_argv[0]=newstr(sep->se_server);
sep->se_argv[1]=newstr(" ");
argc = 1;
for (arg = skip(&cp); cp; arg = skip(&cp))
if (argc < MAXARGV)
sep->se_argv[argc++] = newstr(arg);
while (argc <= MAXARGV)
sep->se_argv[argc++] = NULL;
return (sep);
}
void freeconfig(struct servtab *cp)
{
int i;
if (cp->se_service)
free(cp->se_service);
if (cp->se_proto)
free(cp->se_proto);
if (cp->se_user)
free(cp->se_user);
if (cp->se_server)
free(cp->se_server);
for (i = 0; i < MAXARGV; i++)
if (cp->se_argv[i])
free(cp->se_argv[i]);
}
char * skip(char **cpp)
{
register char *cp = *cpp;
char *start;
if (cp==(char *) 0) return cp;
again:
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp == '\0') {
int c;
c = getc(fconfig);
(void) ungetc(c, fconfig);
if (c == ' ' || c == '\t')
if (cp = nextline(fconfig))
goto again;
*cpp = (char *)0;
return ((char *)0);
}
start = cp;
while (*cp && *cp != ' ' && *cp != '\t')
cp++;
if (*cp != '\0')
*cp++ = '\0';
*cpp = cp;
return (start);
}
char * nextline(FILE *fd)
{
char *cp;
if (fgets(line, sizeof (line), fd) == NULL)
return ((char *)0);
cp = index(line, '\n');
if (cp)
*cp = '\0';
return (line);
}
char * newstr(char *cp)
{
if (cp = strdup(cp ? cp : ""))
return(cp);
syslog(LOG_ERR, "strdup: %m");
exit(-1);
}
/*
* Internet services provided internally by inetd:
*/
#define BUFSIZE 8192
void echo_stream(int *s) /* Echo service -- echo data back */
{
char buffer[BUFSIZE];
int i;
while ((i = recv(*s, buffer, sizeof(buffer),0)) > 0 &&
send(*s, buffer, i, 0) > 0)
;
so_cancel(*s);
soclose(*s);
free(s);
}
void echo_dg(int *s) /* Echo service -- echo data back */
{
char buffer[BUFSIZE];
int i, size;
struct sockaddr sa;
size = sizeof(sa);
if ((i = recvfrom(*s, buffer, sizeof(buffer), 0, &sa, &size)) < 0)
return;
sendto(*s, buffer, i, 0, &sa, sizeof(sa));
free(s);
}
void discard_stream(int *s) /* Discard service -- ignore data */
{
int ret;
char buffer[BUFSIZE];
while (1) {
while ((ret = recv(*s, buffer, sizeof(buffer),0)) > 0)
;
errno = sock_errno();
if (ret == 0 || errno != SOCEINTR)
break;
}
so_cancel(*s);
soclose(*s);
free(s);
}
void discard_dg(int *s) /* Discard service -- ignore data */
{
char buffer[BUFSIZE];
recv(*s, buffer, sizeof(buffer),0);
free(s);
}
#include <ctype.h>
#define LINESIZ 72
char ring[128];
char *endring;
void initring(void)
{
register int i;
endring = ring;
for (i = 0; i <= 128; ++i)
if (isprint(i))
*endring++ = i;
}
void chargen_stream(int *s) /* Character generator */
{
register char *rs;
int len;
char text[LINESIZ+2];
if (!endring) {
initring();
rs = ring;
}
text[LINESIZ] = '\r';
text[LINESIZ + 1] = '\n';
for (rs = ring;;) {
if ((len = endring - rs) >= LINESIZ)
bcopy(rs, text, LINESIZ);
else {
bcopy(rs, text, len);
bcopy(ring, text + len, LINESIZ - len);
}
if (++rs == endring)
rs = ring;
if (send(*s, text, sizeof(text),0) != sizeof(text))
break;
}
so_cancel(*s);
soclose(*s);
free(s);
}
void chargen_dg(int *s) /* Character generator */
{
struct sockaddr sa;
static char *rs;
int len, size;
char text[LINESIZ+2];
if (endring == 0) {
initring();
rs = ring;
}
size = sizeof(sa);
if (recvfrom(*s, text, sizeof(text), 0, &sa, &size) < 0)
return;
if ((len = endring - rs) >= LINESIZ)
bcopy(rs, text, LINESIZ);
else {
bcopy(rs, text, len);
bcopy(ring, text + len, LINESIZ - len);
}
if (++rs == endring)
rs = ring;
text[LINESIZ] = '\r';
text[LINESIZ + 1] = '\n';
sendto(*s, text, sizeof(text), 0, &sa, sizeof(sa));
free(s);
}
/*
* Return a machine readable date and time, in the form of the
* number of seconds since midnight, Jan 1, 1900. Since gettimeofday
* returns the number of seconds since midnight, Jan 1, 1970,
* we must add 2208988800 seconds to this figure to make up for
* some seventy years Bell Labs was asleep.
*/
long machtime(void)
{
struct timeval tv;
if (gettimeofday(&tv, (struct timezone *)0) < 0) {
syslog(LOG_ERR, "Unable to get time of day");
return (0L);
}
return (htonl((long)tv.tv_sec + 2208988800));
}
void machtime_stream(int *s)
{
long result;
result = machtime();
send(*s, (char *) &result, sizeof(result),0);
so_cancel(*s);
soclose(*s);
free(s);
}
void machtime_dg(int *s)
{
long result;
struct sockaddr sa;
int size;
size = sizeof(sa);
if (recvfrom(*s, (char *)&result, sizeof(result), 0, &sa, &size) < 0)
return;
result = machtime();
sendto(*s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
free(s);
}
void daytime_stream(int *s) /* Return human-readable time of day */
{
char buffer[256];
time_t time(), clock;
char *ctime();
clock = time((time_t *) 0);
sprintf(buffer, "%.24s\r\n", ctime(&clock));
send(*s, buffer, strlen(buffer),0);
so_cancel(*s);
soclose(*s);
free(s);
}
void daytime_dg(int *s) /* Return human-readable time of day */
{
char buffer[256];
time_t time(), clock;
struct sockaddr sa;
int size;
char *ctime();
clock = time((time_t *) 0);
size = sizeof(sa);
if (recvfrom(*s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
return;
sprintf(buffer, "%.24s\r\n", ctime(&clock));
sendto(*s, buffer, strlen(buffer), 0, &sa, sizeof(sa));
free(s);
}
/*
* print_service:
* Dump relevant information to stderr
*/
void print_service(char *action, struct servtab *sep)
{
fprintf(stderr,
"%s: %s proto=%s, wait=%d, user=%s builtin=%x server=%s\n",
action, sep->se_service, sep->se_proto,
sep->se_wait, sep->se_user, (int)sep->se_bi, sep->se_server);
}