/* Put information about the system in NAME. */
int
__uname (struct utsname *name)
{
int save;
if (name == NULL)
{
__set_errno (EINVAL);
return -1;
}
save = errno;
if (__gethostname (name->nodename, sizeof (name->nodename)) < 0)
{
if (errno == ENOSYS)
{
/* Hostname is meaningless for this machine. */
name->nodename[0] = '\0';
__set_errno (save);
}
#ifdef ENAMETOOLONG
else if (errno == ENAMETOOLONG)
/* The name was truncated. */
__set_errno (save);
#endif
else
return -1;
}
strncpy (name->sysname, UNAME_SYSNAME, sizeof (name->sysname));
strncpy (name->release, UNAME_RELEASE, sizeof (name->release));
strncpy (name->version, UNAME_VERSION, sizeof (name->version));
strncpy (name->machine, UNAME_MACHINE, sizeof (name->machine));
return 0;
}
int
host2netname (char netname[MAXNETNAMELEN + 1], const char *host,
const char *domain)
{
char *p;
char hostname[MAXHOSTNAMELEN + 1];
char domainname[MAXHOSTNAMELEN + 1];
char *dot_in_host;
size_t i;
netname[0] = '\0'; /* make null first (no need for memset) */
if (host == NULL)
__gethostname (hostname, MAXHOSTNAMELEN);
else
{
strncpy (hostname, host, MAXHOSTNAMELEN);
hostname[MAXHOSTNAMELEN] = '\0';
}
dot_in_host = strchr (hostname, '.');
if (domain == NULL)
{
p = dot_in_host;
if (p)
{
++p;
strncpy (domainname, p, MAXHOSTNAMELEN);
domainname[MAXHOSTNAMELEN] = '\0';
}
else
{
domainname[0] = 0;
getdomainname (domainname, MAXHOSTNAMELEN);
}
}
else
{
strncpy (domainname, domain, MAXHOSTNAMELEN);
domainname[MAXHOSTNAMELEN] = '\0';
}
i = strlen (domainname);
if (i == 0)
/* No domainname */
return 0;
if (domainname[i - 1] == '.')
domainname[i - 1] = 0;
if (dot_in_host) /* strip off rest of name */
*dot_in_host = '\0';
if ((strlen (domainname) + strlen (hostname) + OPSYS_LEN + 3)
> MAXNETNAMELEN)
return 0;
sprintf (netname, "%s.%s@%s", OPSYS, hostname, domainname);
return 1;
}
int
__gethostname_chk (char *buf, size_t buflen, size_t nreal)
{
if (buflen > nreal)
__chk_fail ();
return __gethostname (buf, buflen);
}
int
__uname (struct utsname *uname)
{
error_t err;
if (err = __USEPORT (PROC, __proc_uname (port, uname)))
return __hurd_fail (err);
/* Fill in the hostname, which the proc server doesn't know. */
err = errno;
if (__gethostname (uname->nodename, sizeof uname->nodename) < 0)
{
if (errno == ENAMETOOLONG)
/* Ignore the error of the buffer being too small.
It is of fixed size, nothing to do about it. */
errno = err;
else
return -1;
}
return 0;
}
/* This function has to be reachable by res_data.c but not publically. */
int
__res_vinit(res_state statp, int preinit) {
FILE *fp;
char *cp, **pp;
int n;
char buf[BUFSIZ];
int nserv = 0; /* number of nameservers read from file */
int have_serv6 = 0;
int haveenv = 0;
int havesearch = 0;
#ifdef RESOLVSORT
int nsort = 0;
char *net;
#endif
#ifndef RFC1535
int dots;
#endif
#ifdef _LIBC
statp->_u._ext.initstamp = __res_initstamp;
#endif
if (!preinit) {
statp->retrans = RES_TIMEOUT;
statp->retry = RES_DFLRETRY;
statp->options = RES_DEFAULT;
statp->id = res_randomid();
}
statp->nscount = 0;
statp->ndots = 1;
statp->pfcode = 0;
statp->_vcsock = -1;
statp->_flags = 0;
statp->qhook = NULL;
statp->rhook = NULL;
statp->_u._ext.nscount = 0;
for (n = 0; n < MAXNS; n++)
statp->_u._ext.nsaddrs[n] = NULL;
/* Allow user to override the local domain definition */
if ((cp = getenv("LOCALDOMAIN")) != NULL) {
(void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
haveenv++;
/*
* Set search list to be blank-separated strings
* from rest of env value. Permits users of LOCALDOMAIN
* to still have a search list, and anyone to set the
* one that they want to use as an individual (even more
* important now that the rfc1535 stuff restricts searches)
*/
cp = statp->defdname;
pp = statp->dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
if (*cp == '\n') /* silly backwards compat */
break;
else if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
} else if (n) {
*pp++ = cp;
n = 0;
havesearch = 1;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
cp++;
*cp = '\0';
*pp++ = 0;
}
#define MATCH(line, name) \
(!strncmp(line, name, sizeof(name) - 1) && \
(line[sizeof(name) - 1] == ' ' || \
line[sizeof(name) - 1] == '\t'))
if ((fp = fopen(_PATH_RESCONF, "rce")) != NULL) {
/* No threads use this stream. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
/* read the config file */
while (__fgets_unlocked(buf, sizeof(buf), fp) != NULL) {
/* skip comments */
if (*buf == ';' || *buf == '#')
continue;
/* read default domain name */
if (MATCH(buf, "domain")) {
if (haveenv) /* skip if have from environ */
continue;
cp = buf + sizeof("domain") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
*cp = '\0';
havesearch = 0;
continue;
}
/* set search list */
if (MATCH(buf, "search")) {
if (haveenv) /* skip if have from environ */
continue;
cp = buf + sizeof("search") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
if ((cp = strchr(statp->defdname, '\n')) != NULL)
*cp = '\0';
/*
* Set search list to be blank-separated strings
* on rest of line.
*/
cp = statp->defdname;
pp = statp->dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
} else if (n) {
*pp++ = cp;
n = 0;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' ' && *cp != '\t')
cp++;
*cp = '\0';
*pp++ = 0;
havesearch = 1;
continue;
}
/* read nameservers to query */
if (MATCH(buf, "nameserver") && nserv < MAXNS) {
struct in_addr a;
cp = buf + sizeof("nameserver") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp != '\0') && (*cp != '\n')
&& __inet_aton(cp, &a)) {
statp->nsaddr_list[nserv].sin_addr = a;
statp->nsaddr_list[nserv].sin_family = AF_INET;
statp->nsaddr_list[nserv].sin_port =
htons(NAMESERVER_PORT);
nserv++;
#ifdef _LIBC
} else {
struct in6_addr a6;
char *el;
if ((el = strpbrk(cp, " \t\n")) != NULL)
*el = '\0';
if ((el = strchr(cp, SCOPE_DELIMITER)) != NULL)
*el = '\0';
if ((*cp != '\0') &&
(__inet_pton(AF_INET6, cp, &a6) > 0)) {
struct sockaddr_in6 *sa6;
sa6 = malloc(sizeof(*sa6));
if (sa6 != NULL) {
sa6->sin6_family = AF_INET6;
sa6->sin6_port = htons(NAMESERVER_PORT);
sa6->sin6_flowinfo = 0;
sa6->sin6_addr = a6;
if (__glibc_likely (el == NULL))
sa6->sin6_scope_id = 0;
else {
int try_numericscope = 1;
if (IN6_IS_ADDR_LINKLOCAL (&a6)
|| IN6_IS_ADDR_MC_LINKLOCAL (&a6)) {
sa6->sin6_scope_id
= __if_nametoindex (el + 1);
if (sa6->sin6_scope_id != 0)
try_numericscope = 0;
}
if (try_numericscope) {
char *end;
sa6->sin6_scope_id
= (uint32_t) strtoul (el + 1, &end,
10);
if (*end != '\0')
sa6->sin6_scope_id = 0;
}
}
statp->nsaddr_list[nserv].sin_family = 0;
statp->_u._ext.nsaddrs[nserv] = sa6;
statp->_u._ext.nssocks[nserv] = -1;
have_serv6 = 1;
nserv++;
}
}
#endif
}
continue;
}
#ifdef RESOLVSORT
if (MATCH(buf, "sortlist")) {
struct in_addr a;
cp = buf + sizeof("sortlist") - 1;
while (nsort < MAXRESOLVSORT) {
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp == '\0' || *cp == '\n' || *cp == ';')
break;
net = cp;
while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
isascii(*cp) && !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (__inet_aton(net, &a)) {
statp->sort_list[nsort].addr = a;
if (ISSORTMASK(n)) {
*cp++ = n;
net = cp;
while (*cp && *cp != ';' &&
isascii(*cp) && !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (__inet_aton(net, &a)) {
statp->sort_list[nsort].mask = a.s_addr;
} else {
statp->sort_list[nsort].mask =
net_mask(statp->sort_list[nsort].addr);
}
} else {
statp->sort_list[nsort].mask =
net_mask(statp->sort_list[nsort].addr);
}
nsort++;
}
*cp = n;
}
continue;
}
#endif
if (MATCH(buf, "options")) {
res_setoptions(statp, buf + sizeof("options") - 1, "conf");
continue;
}
}
statp->nscount = nserv;
#ifdef _LIBC
if (have_serv6) {
/* We try IPv6 servers again. */
statp->ipv6_unavail = false;
}
#endif
#ifdef RESOLVSORT
statp->nsort = nsort;
#endif
(void) fclose(fp);
}
if (__builtin_expect(statp->nscount == 0, 0)) {
statp->nsaddr.sin_addr = __inet_makeaddr(IN_LOOPBACKNET, 1);
statp->nsaddr.sin_family = AF_INET;
statp->nsaddr.sin_port = htons(NAMESERVER_PORT);
statp->nscount = 1;
}
if (statp->defdname[0] == 0 &&
__gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
(cp = strchr(buf, '.')) != NULL)
strcpy(statp->defdname, cp + 1);
/* find components of local domain that might be searched */
if (havesearch == 0) {
pp = statp->dnsrch;
*pp++ = statp->defdname;
*pp = NULL;
#ifndef RFC1535
dots = 0;
for (cp = statp->defdname; *cp; cp++)
dots += (*cp == '.');
cp = statp->defdname;
while (pp < statp->dnsrch + MAXDFLSRCH) {
if (dots < LOCALDOMAINPARTS)
break;
cp = __rawmemchr(cp, '.') + 1; /* we know there is one */
*pp++ = cp;
dots--;
}
*pp = NULL;
#ifdef DEBUG
if (statp->options & RES_DEBUG) {
printf(";; res_init()... default dnsrch list:\n");
for (pp = statp->dnsrch; *pp; pp++)
printf(";;\t%s\n", *pp);
printf(";;\t..END..\n");
}
#endif
#endif /* !RFC1535 */
}
if ((cp = getenv("RES_OPTIONS")) != NULL)
res_setoptions(statp, cp, "env");
statp->options |= RES_INIT;
return (0);
}
int
ruserpass (const char *host, const char **aname, const char **apass)
{
char *hdir, *buf, *tmp;
char myname[1024], *mydomain;
int t, usedefault = 0;
struct stat64 stb;
hdir = __libc_secure_getenv("HOME");
if (hdir == NULL) {
/* If we can't get HOME, fail instead of trying ".",
which is no improvement. This really should call
getpwuid(getuid()). */
/*hdir = ".";*/
return -1;
}
buf = alloca (strlen (hdir) + 8);
__stpcpy (__stpcpy (buf, hdir), "/.netrc");
cfile = fopen(buf, "rce");
if (cfile == NULL) {
if (errno != ENOENT)
warn("%s", buf);
return (0);
}
/* No threads use this stream. */
__fsetlocking (cfile, FSETLOCKING_BYCALLER);
if (__gethostname(myname, sizeof(myname)) < 0)
myname[0] = '\0';
mydomain = __strchrnul(myname, '.');
next:
while ((t = token())) switch(t) {
case DEFAULT:
usedefault = 1;
/* FALL THROUGH */
case MACHINE:
if (!usedefault) {
if (token() != ID)
continue;
/*
* Allow match either for user's input host name
* or official hostname. Also allow match of
* incompletely-specified host in local domain.
*/
if (__strcasecmp(host, tokval) == 0)
goto match;
/* if (__strcasecmp(hostname, tokval) == 0)
goto match;
if ((tmp = strchr(hostname, '.')) != NULL &&
__strcasecmp(tmp, mydomain) == 0 &&
__strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
tokval[tmp - hostname] == '\0')
goto match; */
if ((tmp = strchr(host, '.')) != NULL &&
__strcasecmp(tmp, mydomain) == 0 &&
__strncasecmp(host, tokval, tmp - host) == 0 &&
tokval[tmp - host] == '\0')
goto match;
continue;
}
match:
while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {
case LOGIN:
if (token()) {
if (*aname == 0) {
char *newp;
newp = malloc((unsigned) strlen(tokval) + 1);
if (newp == NULL)
{
warnx(_("out of memory"));
goto bad;
}
*aname = strcpy(newp, tokval);
} else {
if (strcmp(*aname, tokval))
goto next;
}
}
break;
case PASSWD:
if (strcmp(*aname, "anonymous") &&
fstat64(fileno(cfile), &stb) >= 0 &&
(stb.st_mode & 077) != 0) {
warnx(_("Error: .netrc file is readable by others."));
warnx(_("Remove password or make file unreadable by others."));
goto bad;
}
if (token() && *apass == 0) {
char *newp;
newp = malloc((unsigned) strlen(tokval) + 1);
if (newp == NULL)
{
warnx(_("out of memory"));
goto bad;
}
*apass = strcpy(newp, tokval);
}
break;
case ACCOUNT:
break;
case MACDEF:
break;
default:
warnx(_("Unknown .netrc keyword %s"), tokval);
break;
}
goto done;
}
done:
(void) fclose(cfile);
return (0);
bad:
(void) fclose(cfile);
return (-1);
}
/* This function has to be reachable by res_data.c but not publically. */
int
__res_vinit(res_state statp, int preinit) {
register FILE *fp;
register char *cp, **pp;
register int n;
char buf[BUFSIZ];
int nserv = 0; /* number of nameserver records read from file */
#ifdef _LIBC
int nservall = 0; /* number of NS records read, nserv IPv4 only */
#endif
int haveenv = 0;
int havesearch = 0;
#ifdef RESOLVSORT
int nsort = 0;
char *net;
#endif
#ifndef RFC1535
int dots;
#endif
if (!preinit) {
statp->retrans = RES_TIMEOUT;
statp->retry = RES_DFLRETRY;
statp->options = RES_DEFAULT;
statp->id = res_randomid();
}
#ifdef USELOOPBACK
statp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
#else
statp->nsaddr.sin_addr.s_addr = INADDR_ANY;
#endif
statp->nsaddr.sin_family = AF_INET;
statp->nsaddr.sin_port = htons(NAMESERVER_PORT);
statp->nscount = 1;
statp->ndots = 1;
statp->pfcode = 0;
statp->_vcsock = -1;
statp->_flags = 0;
statp->qhook = NULL;
statp->rhook = NULL;
statp->_u._ext.nsinit = 0;
statp->_u._ext.nscount = 0;
#ifdef _LIBC
statp->_u._ext.nscount6 = 0;
for (n = 0; n < MAXNS; n++)
statp->_u._ext.nsaddrs[n] = NULL;
#endif
/* Allow user to override the local domain definition */
if ((cp = getenv("LOCALDOMAIN")) != NULL) {
(void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
haveenv++;
/*
* Set search list to be blank-separated strings
* from rest of env value. Permits users of LOCALDOMAIN
* to still have a search list, and anyone to set the
* one that they want to use as an individual (even more
* important now that the rfc1535 stuff restricts searches)
*/
cp = statp->defdname;
pp = statp->dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
if (*cp == '\n') /* silly backwards compat */
break;
else if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
} else if (n) {
*pp++ = cp;
n = 0;
havesearch = 1;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
cp++;
*cp = '\0';
*pp++ = 0;
}
#define MATCH(line, name) \
(!strncmp(line, name, sizeof(name) - 1) && \
(line[sizeof(name) - 1] == ' ' || \
line[sizeof(name) - 1] == '\t'))
if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
/* No threads use this stream. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
/* read the config file */
while (fgets_unlocked(buf, sizeof(buf), fp) != NULL) {
/* skip comments */
if (*buf == ';' || *buf == '#')
continue;
/* read default domain name */
if (MATCH(buf, "domain")) {
if (haveenv) /* skip if have from environ */
continue;
cp = buf + sizeof("domain") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
*cp = '\0';
havesearch = 0;
continue;
}
/* set search list */
if (MATCH(buf, "search")) {
if (haveenv) /* skip if have from environ */
continue;
cp = buf + sizeof("search") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
if ((cp = strchr(statp->defdname, '\n')) != NULL)
*cp = '\0';
/*
* Set search list to be blank-separated strings
* on rest of line.
*/
cp = statp->defdname;
pp = statp->dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
} else if (n) {
*pp++ = cp;
n = 0;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' ' && *cp != '\t')
cp++;
*cp = '\0';
*pp++ = 0;
havesearch = 1;
continue;
}
/* read nameservers to query */
#ifdef _LIBC
if (MATCH(buf, "nameserver") && nservall < MAXNS) {
#else
if (MATCH(buf, "nameserver") && nserv < MAXNS) {
#endif
struct in_addr a;
cp = buf + sizeof("nameserver") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp != '\0') && (*cp != '\n')
&& __inet_aton(cp, &a)) {
statp->nsaddr_list[nserv].sin_addr = a;
statp->nsaddr_list[nserv].sin_family = AF_INET;
statp->nsaddr_list[nserv].sin_port =
htons(NAMESERVER_PORT);
nserv++;
#ifdef _LIBC
nservall++;
} else {
struct in6_addr a6;
char *el;
if ((el = strchr(cp, '\n')) != NULL)
*el = '\0';
if ((*cp != '\0') &&
(inet_pton(AF_INET6, cp, &a6) > 0)) {
struct sockaddr_in6 *sa6;
sa6 = malloc(sizeof(*sa6));
if (sa6 != NULL) {
sa6->sin6_addr = a6;
sa6->sin6_family = AF_INET6;
sa6->sin6_port = htons(NAMESERVER_PORT);
statp->_u._ext.nsaddrs[nservall] = sa6;
statp->_u._ext.nstimes[nservall] = RES_MAXTIME;
statp->_u._ext.nssocks[nservall] = -1;
nservall++;
}
}
#endif
}
continue;
}
#ifdef RESOLVSORT
if (MATCH(buf, "sortlist")) {
struct in_addr a;
cp = buf + sizeof("sortlist") - 1;
while (nsort < MAXRESOLVSORT) {
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp == '\0' || *cp == '\n' || *cp == ';')
break;
net = cp;
while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
isascii(*cp) && !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (__inet_aton(net, &a)) {
statp->sort_list[nsort].addr = a;
if (ISSORTMASK(n)) {
*cp++ = n;
net = cp;
while (*cp && *cp != ';' &&
isascii(*cp) && !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (__inet_aton(net, &a)) {
statp->sort_list[nsort].mask = a.s_addr;
} else {
statp->sort_list[nsort].mask =
net_mask(statp->sort_list[nsort].addr);
}
} else {
statp->sort_list[nsort].mask =
net_mask(statp->sort_list[nsort].addr);
}
nsort++;
}
*cp = n;
}
continue;
}
#endif
if (MATCH(buf, "options")) {
res_setoptions(statp, buf + sizeof("options") - 1, "conf");
continue;
}
}
if (nserv > 1)
statp->nscount = nserv;
#ifdef _LIBC
if (nservall - nserv > 0)
statp->_u._ext.nscount6 = nservall - nserv;
#endif
#ifdef RESOLVSORT
statp->nsort = nsort;
#endif
(void) fclose(fp);
}
if (statp->defdname[0] == 0 &&
__gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
(cp = strchr(buf, '.')) != NULL)
strcpy(statp->defdname, cp + 1);
/* find components of local domain that might be searched */
if (havesearch == 0) {
pp = statp->dnsrch;
*pp++ = statp->defdname;
*pp = NULL;
#ifndef RFC1535
dots = 0;
for (cp = statp->defdname; *cp; cp++)
dots += (*cp == '.');
cp = statp->defdname;
while (pp < statp->dnsrch + MAXDFLSRCH) {
if (dots < LOCALDOMAINPARTS)
break;
cp = __rawmemchr(cp, '.') + 1; /* we know there is one */
*pp++ = cp;
dots--;
}
*pp = NULL;
#ifdef DEBUG
if (statp->options & RES_DEBUG) {
printf(";; res_init()... default dnsrch list:\n");
for (pp = statp->dnsrch; *pp; pp++)
printf(";;\t%s\n", *pp);
printf(";;\t..END..\n");
}
#endif
#endif /* !RFC1535 */
}
if ((cp = getenv("RES_OPTIONS")) != NULL)
res_setoptions(statp, cp, "env");
statp->options |= RES_INIT;
return (0);
}
static void
internal_function
res_setoptions(res_state statp, const char *options, const char *source) {
const char *cp = options;
int i;
#ifdef DEBUG
if (statp->options & RES_DEBUG)
printf(";; res_setoptions(\"%s\", \"%s\")...\n",
options, source);
#endif
while (*cp) {
/* skip leading and inner runs of spaces */
while (*cp == ' ' || *cp == '\t')
cp++;
/* search for and process individual options */
if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
i = atoi(cp + sizeof("ndots:") - 1);
if (i <= RES_MAXNDOTS)
statp->ndots = i;
else
statp->ndots = RES_MAXNDOTS;
#ifdef DEBUG
if (statp->options & RES_DEBUG)
printf(";;\tndots=%d\n", statp->ndots);
#endif
} else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
i = atoi(cp + sizeof("timeout:") - 1);
if (i <= RES_MAXRETRANS)
statp->retrans = i;
else
statp->retrans = RES_MAXRETRANS;
} else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
i = atoi(cp + sizeof("attempts:") - 1);
if (i <= RES_MAXRETRY)
statp->retry = i;
else
statp->retry = RES_MAXRETRY;
} else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
#ifdef DEBUG
if (!(statp->options & RES_DEBUG)) {
printf(";; res_setoptions(\"%s\", \"%s\")..\n",
options, source);
statp->options |= RES_DEBUG;
}
printf(";;\tdebug\n");
#endif
} else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
statp->options |= RES_USE_INET6;
} else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) {
statp->options |= RES_ROTATE;
} else if (!strncmp(cp, "no-check-names",
sizeof("no-check-names") - 1)) {
statp->options |= RES_NOCHECKNAME;
} else {
/* XXX - print a warning here? */
}
/* skip to next run of spaces */
while (*cp && *cp != ' ' && *cp != '\t')
cp++;
}
}
#ifdef RESOLVSORT
/* XXX - should really support CIDR which means explicit masks always. */
static u_int32_t
net_mask(in) /* XXX - should really use system's version of this */
struct in_addr in;
{
register u_int32_t i = ntohl(in.s_addr);
if (IN_CLASSA(i))
return (htonl(IN_CLASSA_NET));
else if (IN_CLASSB(i))
return (htonl(IN_CLASSB_NET));
return (htonl(IN_CLASSC_NET));
}
#endif
u_int
res_randomid(void) {
struct timeval now;
__gettimeofday(&now, NULL);
return (0xffff & (now.tv_sec ^ now.tv_usec ^ __getpid()));
}
/*
* This routine is for closing the socket if a virtual circuit is used and
* the program wants to close it. This provides support for endhostent()
* which expects to close the socket.
*
* This routine is not expected to be user visible.
*/
void
res_nclose(res_state statp) {
int ns;
if (statp->_vcsock >= 0) {
(void) __close(statp->_vcsock);
statp->_vcsock = -1;
statp->_flags &= ~(RES_F_VC | RES_F_CONN);
}
#ifdef _LIBC
for (ns = 0; ns < statp->_u._ext.nscount + statp->_u._ext.nscount6;
ns++)
#else
for (ns = 0; ns < statp->_u._ext.nscount; ns++)
#endif
{
if (statp->_u._ext.nssocks[ns] != -1) {
(void) __close(statp->_u._ext.nssocks[ns]);
statp->_u._ext.nssocks[ns] = -1;
}
}
statp->_u._ext.nsinit = 0;
}
