fix: add misc

fix porting

Change-Id: Ic1bd1cdcc5db6bc368c7a0860cd9565a21f7f21c

porting/liteos_a/user/src/network/gethostbyname.c

-#define _GNU_SOURCE
-
-#include <sys/socket.h>
-#include <netdb.h>
-#include <string.h>
-#include <netinet/in.h>
-
-struct hostent *gethostbyname(const char *name)
-{
-	return gethostbyname2(name, AF_INET);
-}

porting/liteos_a/user/src/network/gethostbyname2_r.c

-#define _GNU_SOURCE
-
-#include <sys/socket.h>
-#include <netdb.h>
-#include <string.h>
-#include <netinet/in.h>
-#include <errno.h>
-#include <stdint.h>
-#include "lookup.h"
-
-int gethostbyname2_r(const char *name, int af,
-	struct hostent *h, char *buf, size_t buflen,
-	struct hostent **res, int *err)
-{
-	struct address addrs[MAXADDRS];
-	char canon[256];
-	int i, cnt;
-	size_t align, need;
-
-	*res = 0;
-
-	cnt = __lookup_name(addrs, canon, name, af, AI_CANONNAME);
-	if (cnt<0) switch (cnt) {
-	case EAI_NONAME:
-		*err = HOST_NOT_FOUND;
-		return ENOENT;
-	case EAI_AGAIN:
-		*err = TRY_AGAIN;
-		return EAGAIN;
-	default:
-	case EAI_FAIL:
-		*err = NO_RECOVERY;
-		return EBADMSG;
-	case EAI_MEMORY:
-	case EAI_SYSTEM:
-		*err = NO_RECOVERY;
-		return errno;
-	}
-
-	h->h_addrtype = af;
-	h->h_length = af==AF_INET6 ? 16 : 4;
-
-	/* Align buffer */
-	align = -(uintptr_t)buf & sizeof(char *)-1;
-
-	need = 4*sizeof(char *);
-	need += (cnt + 1) * (sizeof(char *) + h->h_length);
-	need += strlen(name)+1;
-	need += strlen(canon)+1;
-	need += align;
-
-	if (need > buflen) return ERANGE;
-
-	buf += align;
-	h->h_aliases = (void *)buf;
-	buf += 3*sizeof(char *);
-	h->h_addr_list = (void *)buf;
-	buf += (cnt+1)*sizeof(char *);
-
-	for (i=0; i<cnt; i++) {
-		h->h_addr_list[i] = (void *)buf;
-		buf += h->h_length;
-		memcpy(h->h_addr_list[i], addrs[i].addr, h->h_length);
-	}
-	h->h_addr_list[i] = 0;
-
-	h->h_name = h->h_aliases[0] = buf;
-	strcpy(h->h_name, canon);
-	buf += strlen(h->h_name)+1;
-
-	if (strcmp(h->h_name, name)) {
-		h->h_aliases[1] = buf;
-		strcpy(h->h_aliases[1], name);
-		buf += strlen(h->h_aliases[1])+1;
-	} else h->h_aliases[1] = 0;
-
-	h->h_aliases[2] = 0;
-
-	*res = h;
-	return 0;
-}

porting/liteos_a/user/src/unistd/gethostname.c

-#include <unistd.h>
-#include <sys/utsname.h>
-
-int gethostname(char *name, size_t len)
-{
-	size_t i;
-	struct utsname uts;
-
-	if (uname(&uts)) return -1;
-	if (len > sizeof uts.nodename) len = sizeof uts.nodename;
-	for (i=0; i<len && (name[i] = uts.nodename[i]); i++);
-	if (i && i==len) name[i-1] = 0;
-	return 0;
-}