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-rw-r--r--lib/libpthread/net/gethostent.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/lib/libpthread/net/gethostent.c b/lib/libpthread/net/gethostent.c
new file mode 100644
index 00000000000..feb065129dd
--- /dev/null
+++ b/lib/libpthread/net/gethostent.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+/*static char *sccsid = "from: @(#)gethostent.c 5.8 (Berkeley) 2/24/91";*/
+static char *rcsid = "$Id: gethostent.c,v 1.1 1998/07/21 13:19:45 peter Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "res_internal.h"
+
+static pthread_mutex_t res_file_lock = PTHREAD_MUTEX_INITIALIZER;
+static int res_file_stayopen;
+static FILE *res_file;
+
+void sethostent(int stayopen)
+{
+ pthread_mutex_lock(&res_file_lock);
+ res_file_stayopen |= stayopen;
+ if (res_file)
+ rewind(res_file);
+ else
+ res_file = fopen(_PATH_HOSTS, "r");
+ pthread_mutex_unlock(&res_file_lock);
+}
+
+void endhostent()
+{
+ pthread_mutex_lock(&res_file_lock);
+ if (res_file)
+ fclose(res_file);
+ pthread_mutex_unlock(&res_file_lock);
+}
+
+struct hostent *gethostent()
+{
+ struct res_data *data = _res_init();
+
+ if (!data)
+ return NULL;
+ if (!data->buf) {
+ data->buf = malloc(sizeof(struct hostent) + HOST_BUFSIZE);
+ if (!data->buf) {
+ data->errval = NO_RECOVERY;
+ return NULL;
+ }
+ }
+ return gethostent_r((struct hostent *) data->buf,
+ data->buf + sizeof(struct hostent), HOST_BUFSIZE,
+ &data->errval);
+}
+
+struct hostent *gethostent_r(struct hostent *result, char *buf, int bufsize,
+ int *errval)
+{
+ char *p, **alias;
+ struct in_addr *addr;
+ int l;
+
+ errno = 0;
+ pthread_mutex_lock(&res_file_lock);
+ if (res_file == NULL && (res_file = fopen(_PATH_HOSTS, "r")) == NULL) {
+ pthread_mutex_unlock(&res_file_lock);
+ return NULL;
+ }
+ while (fgets(buf, bufsize, res_file)) {
+ if (*buf == '#')
+ continue;
+ p = strpbrk(buf, "#\n");
+ if (p == NULL)
+ continue;
+ l = strlen(buf) + 1;
+ *p = '\0';
+ p = strpbrk(buf, " \t");
+ if (p == NULL)
+ continue;
+ *p++ = '\0';
+
+ /* THIS STUFF IS INTERNET SPECIFIC */
+ if (SP(SP(SP(buf, char, l), *addr, 1), char *, 3) > buf + bufsize) {
+ errno = ERANGE;
+ break;
+ }
+ addr = (struct in_addr *) ALIGN(buf + l, struct in_addr);
+ if (inet_aton(buf, addr) == 0)
+ continue;
+ result->h_length = sizeof(*addr);
+ result->h_addrtype = AF_INET;
+ result->h_addr_list = (char **) ALIGN(addr + sizeof(*addr), char *);
+ result->h_addr_list[0] = (char *) addr;
+ result->h_addr_list[1] = NULL;
+ result->h_aliases = result->h_addr_list + 2;
+ while (*p == ' ' || *p == '\t')
+ p++;
+ result->h_name = p;
+ alias = result->h_aliases;
+ p = strpbrk(p, " \t");
+ if (p != NULL)
+ *p++ = '\0';
+ while (p && *p) {
+ if (*p == ' ' || *p == '\t') {
+ p++;
+ continue;
+ }
+ if ((char *) &alias[2] > buf + bufsize) {
+ errno = ERANGE;
+ break;
+ }
+ *alias++ = p;
+ p = strpbrk(p, " \t");
+ if (p != NULL)
+ *p++ = '\0';
+ }
+ if (p && *p)
+ break;
+ *alias = NULL;
+ pthread_mutex_unlock(&res_file_lock);
+ return result;
+ }
+
+ pthread_mutex_unlock(&res_file_lock);
+ *errval = (errno == ERANGE) ? NO_RECOVERY : 0;
+ return NULL;
+}
+