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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#define __FORCE_GLIBC
#include <features.h>
#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
# define LOCK __pthread_mutex_lock(&mylock)
# define UNLOCK __pthread_mutex_unlock(&mylock);
#else
# define LOCK
# define UNLOCK
#endif
#define MAXALIASES 35
static const char NETDB[] = _PATH_NETWORKS;
static FILE *netf = NULL;
static char line[BUFSIZ+1];
static struct netent net;
static char *net_aliases[MAXALIASES];
int _net_stayopen;
void setnetent(int f)
{
LOCK;
if (netf == NULL)
netf = fopen(NETDB, "r" );
else
rewind(netf);
_net_stayopen |= f;
UNLOCK;
return;
}
void endnetent(void)
{
LOCK;
if (netf) {
fclose(netf);
netf = NULL;
}
_net_stayopen = 0;
UNLOCK;
}
static char * any(register char *cp, char *match)
{
register char *mp, c;
while ((c = *cp)) {
for (mp = match; *mp; mp++)
if (*mp == c)
return (cp);
cp++;
}
return ((char *)0);
}
struct netent * getnetent(void)
{
char *p;
register char *cp, **q;
LOCK;
if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL) {
UNLOCK;
return (NULL);
}
again:
p = fgets(line, BUFSIZ, netf);
if (p == NULL) {
UNLOCK;
return (NULL);
}
if (*p == '#')
goto again;
cp = any(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
net.n_name = p;
cp = any(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
while (*cp == ' ' || *cp == '\t')
cp++;
p = any(cp, " \t");
if (p != NULL)
*p++ = '\0';
net.n_net = inet_network(cp);
net.n_addrtype = AF_INET;
q = net.n_aliases = net_aliases;
if (p != NULL)
cp = p;
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &net_aliases[MAXALIASES - 1])
*q++ = cp;
cp = any(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
UNLOCK;
return (&net);
}
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