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$NetBSD: patch-af,v 1.1.1.1.58.1 2010/07/04 07:18:44 agc Exp $
--- skkserv/skkserv.c.orig Tue Jan 21 04:16:36 1997
+++ skkserv/skkserv.c Mon Nov 6 00:12:57 2000
@@ -100,14 +100,16 @@
#define SERVER_NOT_FOUND "4"
#define SERVER_FULL "9"
+#define warn(m) \
+ {if (debug) fprintf(errout, "%s: %s\n", pgmnm, m);}
#define err(m) \
- {if (debug) fprintf(errout, "%s: %s\n", pgmnm, m); exit(1);}
+ {warn(m); exit(1);}
/*
* Global Variables
*/
-char pgmver[] = "3.9.4 "; /* version number */
+char pgmver[] = "3.9.4nb1 "; /* version number */
char *pgmnm; /* program name */
char *jname; /* name of shared dictionary */
@@ -121,6 +123,9 @@
int jtab1[KANAMOJI]; /* index-table by 1st letter (1st part)*/
int jtab2[KANAMOJI]; /* index-table by 1st letter (2nd part)*/
int initsock; /* socket for waiting requests */
+#ifdef PF_INET6
+int initsock6; /* IPv6 socket for waiting requests */
+#endif
int clientsock[MAXCLNT]; /* socket for each client */
int nclients; /* max index for active clients */
@@ -130,8 +135,18 @@
int parg;
int setjisho = 0;
int ctlterm; /* fildes for control terminal */
- void reread();
+ RETSIGTYPE req_reread();
+
+#ifdef SKKSERV_UID
+ gid_t gid = SKKSERV_GID;
+ /* revoke privilege if any */
+ if (geteuid() == 0) {
+ setgroups(1, &gid);
+ setgid(SKKSERV_GID);
+ setuid(SKKSERV_UID);
+ }
+#endif
pgmnm = argv[0];
debug = 0;
errout = stderr;
@@ -200,7 +215,10 @@
fclose(stderr);
/* detach child process from control terminal */
-#ifdef HAVE_TIOCNOTTY
+#ifdef HAVE_SETSID
+ setsid();
+#else
+#ifdef TIOCNOTTY
if ((ctlterm = open("/dev/tty", 2)) >= 0) {
ioctl(ctlterm, TIOCNOTTY, 0);
close(ctlterm);
@@ -215,6 +233,7 @@
signal(SIGHUP, SIG_IGN);
if (fork() != 0) exit(0);
#endif
+#endif
} else { /* debug mode */
fprintf(errout, "SKK-JISYO is %s\n", jname);
fflush(errout);
@@ -222,7 +241,7 @@
if (errout != stderr) fclose(stderr);
}
- signal(SIGINT, reread);
+ signal(SIGINT, req_reread);
/* 1993/6/5 by kam, re-read dictionary by "INT" signal */
nclients = 0;
@@ -244,8 +263,11 @@
mksock()
{
struct sockaddr_in sin;
+#ifdef PF_INET6
+ struct sockaddr_in6 sin6;
+#endif
struct servent *sp;
- int optbuf = 1; /* enable socket REUSEADDR */
+ int optbuf; /* enable socket REUSEADDR */
bzero((char*)&sin, sizeof(sin));
sin.sin_family = AF_INET;
@@ -262,16 +284,54 @@
sin.sin_port = htons(portnum);
if ((initsock = socket(PF_INET, SOCK_STREAM, 0)) < 0)
- err("socket error; socket cannot be created");
- if (setsockopt(initsock, SOL_SOCKET, SO_REUSEADDR,
+ warn("socket error; socket cannot be created");
+#ifdef PF_INET6
+ bzero((char*)&sin6, sizeof(sin6));
+ sin6.sin6_family = AF_INET6;
+ /* sin6.sin6_addr.s6_addr = IN6ADDR_ANY_INIT; ... all-zero pattern */
+ sin6.sin6_port = htons(portnum);
+ if ((initsock6 = socket(PF_INET6, SOCK_STREAM, 0)) < 0)
+ warn("socket error; IPv6 socket cannot be created");
+#endif
+ optbuf = 1;
+ if (initsock >= 0 && setsockopt(initsock, SOL_SOCKET, SO_REUSEADDR,
+ &optbuf, sizeof(optbuf)) < 0)
+ warn("socket error; cannot set socket option");
+#ifdef PF_INET6
+ optbuf = 1;
+ if (initsock6 >= 0 && setsockopt(initsock6, SOL_SOCKET, SO_REUSEADDR,
&optbuf, sizeof(optbuf)) < 0)
- err("socket error; cannot set socket option");
- if (bind(initsock, (struct sockaddr *)&sin, sizeof(sin))< 0)
- err("bind error; the socket is already used");
- if (listen(initsock, MAXQUE) < 0)
+ warn("socket error; cannot set socket option");
+#endif
+ if (initsock >= 0 && bind(initsock, (struct sockaddr *)&sin, sizeof(sin))< 0) {
+ warn("bind error; the socket is already used");
+ close(initsock);
+ initsock = -1;
+ }
+#ifdef PF_INET6
+ if (initsock6 >= 0 && bind(initsock6, (struct sockaddr *)&sin6, sizeof(sin6))< 0) {
+ warn("bind error; the socket is already used");
+ close(initsock6);
+ initsock6 = -1;
+ }
+#endif
+ if (initsock < 0
+#ifdef PF_INET6
+ && initsock6 < 0
+#endif
+ )
+ exit(1);
+ if (initsock >= 0 && listen(initsock, MAXQUE) < 0)
err("listen error; something wrong happened with the socket");
+#ifdef PF_INET6
+ if (initsock6 >= 0 && listen(initsock6, MAXQUE) < 0)
+ err("listen error; something wrong happened with the IPv6 socket");
+#endif
if (debug) {
fprintf(errout, "file descriptor for initsock is %d\n", initsock);
+#ifdef PF_INET6
+ fprintf(errout, "file descriptor for initsock6 is %d\n", initsock6);
+#endif
fflush(errout);
}
}
@@ -303,8 +363,19 @@
mkoldjtab(buf);
}
+/* using stdio in signal handler is unsafe */
+#ifdef __STDC__
+volatile
+#endif
+int reread_requested;
+
+RETSIGTYPE req_reread()
+{
+ reread_requested = 1;
+}
+
/* 1993/6/5 by kam, re-read dictionary by "INT" signal */
-RETSIGTYPE reread()
+void reread()
{
if (fclose(jisho) < 0) {
fprintf(stderr,
@@ -455,15 +526,22 @@
main_loop()
{
fd_set readfds, writefds, exceptfds;
- fd_set getrfds();
+ void getrfds();
struct sockaddr_in from;
+#ifdef PF_INET6
+ struct sockaddr_in6 from6;
+#endif
int len;
register int i;
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
for(;;) { /* infinite loop; waiting for client's request */
- readfds = getrfds();
+ if (reread_requested) {
+ reread();
+ reread_requested = 0;
+ }
+ getrfds(&readfds);
if (select(MAXDTAB, &readfds, &writefds, &exceptfds, NULL) < 0) {
if (errno == EINTR) /* if signal happens */
continue;
@@ -474,16 +552,32 @@
fflush(errout);
}
- if (FD_ISSET(initsock, &readfds)) {
+ if (initsock >= 0 && FD_ISSET(initsock, &readfds)) {
len = sizeof(from);
if ((clientsock[nclients ++] = accept(initsock, &from, &len)) < 0) {
err("accept error; something wrong happened with the socket");
}
- if (nclients >= MAXDTAB - 3 - debug * 2) {
+ if (nclients >= MAXDTAB - 3
+#ifdef PF_INET6
+ -1
+#endif
+ - debug * 2) {
write(clientsock[--nclients], SERVER_FULL, 1);
close(clientsock[nclients]);
}
}
+#ifdef PF_INET6
+ if (initsock6 >= 0 && FD_ISSET(initsock6, &readfds)) {
+ len = sizeof(from6);
+ if ((clientsock[nclients ++] = accept(initsock6, &from6, &len)) < 0) {
+ err("accept error; something wrong happened with the socket");
+ }
+ if (nclients >= MAXDTAB - 4 - debug * 2) {
+ write(clientsock[--nclients], SERVER_FULL, 1);
+ close(clientsock[nclients]);
+ }
+ }
+#endif
/* naiive scheduling */
for (i = 0; i < nclients; i ++)
@@ -511,16 +605,20 @@
* get bit pattern of read file descriptor
*/
-fd_set getrfds()
+void getrfds(rfds)
+fd_set *rfds;
{
- fd_set rfds;
register int i;
- FD_ZERO(&rfds);
- FD_SET(initsock, &rfds);
+ FD_ZERO(rfds);
+ if (initsock >= 0)
+ FD_SET(initsock, rfds);
+#ifdef PF_INET6
+ if (initsock6 >= 0)
+ FD_SET(initsock6, rfds);
+#endif
for (i = 0; i < nclients; i ++)
- FD_SET(clientsock[i], &rfds);
- return (rfds);
+ FD_SET(clientsock[i], rfds);
}
/*
@@ -724,6 +822,9 @@
exit(1);
}
hentry = gethostbyname(hname);
+ if (hentry == NULL) {
+ fprintf(errout, "%s: WARNING: gethostbyname(%s) failed\n", pgmnm, hname);
+ } else {
#ifdef NO_ADDR_LIST
strcat(hname, ":");
strcat(hname, hentry->h_addr);
@@ -736,6 +837,7 @@
strcat(hname, inet_ntoa(*(struct in_addr *)*p++));
}
#endif
+ }
strcat(hname, ": ");
}
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