1 files changed, 127 insertions, 0 deletions

diff --git a/src/lib/libc/net/getprotoent.c b/src/lib/libc/net/getprotoent.c
new file mode 100644
index 0000000000..2f8b267611
--- /dev/null
+++ b/src/lib/libc/net/getprotoent.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 1983, 1993
+ *      The 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 rcsid[] = "$OpenBSD: getprotoent.c,v 1.4 1999/09/03 16:23:18 millert Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAXALIASES      35
+
+static FILE *protof = NULL;
+static char line[BUFSIZ+1];
+static struct protoent proto;
+static char *proto_aliases[MAXALIASES];
+int _proto_stayopen;
+
+void
+setprotoent(f)
+        int f;
+{
+        if (protof == NULL)
+                protof = fopen(_PATH_PROTOCOLS, "r" );
+        else
+                rewind(protof);
+        _proto_stayopen |= f;
+}
+
+void
+endprotoent()
+{
+        if (protof) {
+                fclose(protof);
+                protof = NULL;
+        }
+        _proto_stayopen = 0;
+}
+
+struct protoent *
+getprotoent()
+{
+        char *p, *cp, **q, *endp;
+        long l;
+        size_t len;
+
+        if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
+                return (NULL);
+again:
+        if ((p = fgetln(protof, &len)) == NULL)
+                return (NULL);
+        if (p[len-1] == '\n')
+                len--;
+        if (len >= sizeof(line) || len == 0)
+                goto again;
+        p = memcpy(line, p, len);
+        line[len] = '\0';
+        if (*p == '#')
+                goto again;
+        if ((cp = strchr(p, '#')) != NULL)
+                *cp = '\0';
+        proto.p_name = p;
+        cp = strpbrk(p, " \t");
+        if (cp == NULL)
+                goto again;
+        *cp++ = '\0';
+        while (*cp == ' ' || *cp == '\t')
+                cp++;
+        p = strpbrk(cp, " \t");
+        if (p != NULL)
+                *p++ = '\0';
+        l = strtol(cp, &endp, 10);
+        if (endp == cp || *endp != '\0' || l < 0 || l >= INT_MAX)
+                goto again;
+        proto.p_proto = l;
+        q = proto.p_aliases = proto_aliases;
+        if (p != NULL) {
+                cp = p;
+                while (cp && *cp) {
+                        if (*cp == ' ' || *cp == '\t') {
+                                cp++;
+                                continue;
+                        }
+                        if (q < &proto_aliases[MAXALIASES - 1])
+                                *q++ = cp;
+                        cp = strpbrk(cp, " \t");
+                        if (cp != NULL)
+                                *cp++ = '\0';
+                }
+        }
+        *q = NULL;
+        return (&proto);
+}