1 files changed, 137 insertions, 0 deletions
diff --git a/unix/os/net/ghostent.c b/unix/os/net/ghostent.c
new file mode 100644
index 00000000..484e2640
--- /dev/null
+++ b/unix/os/net/ghostent.c
@@ -0,0 +1,137 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+
+#include <stdio.h>
+#include "types.h"
+#include "netdb.h"
+#include "socket.h"
+
+#define	import_kernel
+#define	import_knames
+#define	import_spp
+#include <iraf.h>
+
+#define MAXALIASES	35
+#define MAXADDRSIZE	14
+#define	LINSIZ		80
+
+static int	hostf = NULL;
+static char	line[LINSIZ+1];
+static char	hostaddr[MAXADDRSIZE];
+static struct	hostent host;
+static char	*host_aliases[MAXALIASES];
+static char	*tcp_locate();
+
+
+/* TCP_GHOSTENT -- Return the next entry (line) in the host name table
+ * decoded into a hostent structure.
+ *
+ * The format of an entry in the host name table (e.g., /etc/hosts on a UNIX
+ * system) is as follows:
+ *
+ *	ddd.ddd		alias1 alias2 ... aliasN
+ */
+struct hostent *
+tcp_ghostent()
+{
+	register char *cp, **q;
+	u_long	tcp_inetaddr();
+	char	*p, *tcp_hostdb();
+	char	*ku_fgets();
+
+	if (hostf == NULL && (hostf = ku_fopen (tcp_hostdb(), "r" )) == NULL)
+	    return (NULL);
+
+again:
+	if ((p = ku_fgets (line, LINSIZ, hostf)) == NULL)
+	    return (NULL);
+eprintf("..%s", line);
+
+	if (*p == '#')
+	    goto again;
+	cp = tcp_locate (p, "#\n");
+	if (cp == NULL)
+	    goto again;
+
+	*cp = '\0';
+	cp = tcp_locate (p, " \t");
+	if (cp == NULL)
+	    goto again;
+	*cp++ = '\0';
+
+	/* THIS STUFF IS INTERNET SPECIFIC.
+	 */
+	host.h_addr = hostaddr;
+	*((u_long *)host.h_addr) = tcp_inetaddr (p);
+	host.h_length = sizeof (u_long);
+	host.h_addrtype = AF_INET;
+
+	while (*cp == ' ' || *cp == '\t')
+	    cp++;
+	host.h_name = cp;
+
+	q = host.h_aliases = host_aliases;
+	cp = tcp_locate (cp, " \t");
+	if (cp != NULL) 
+	    *cp++ = '\0';
+
+	while (cp && *cp) {
+	    if (*cp == ' ' || *cp == '\t') {
+		cp++;
+		continue;
+	    }
+	    if (q < &host_aliases[MAXALIASES - 1])
+		*q++ = cp;
+	    cp = tcp_locate (cp, " \t");
+	    if (cp != NULL)
+		*cp++ = '\0';
+	}
+
+	*q = NULL;
+
+	return (&host);
+}
+
+
+/* TCP_OPHNT -- Open the host name table, a text file.
+ */
+tcp_ophnt()
+{
+	char	*tcp_hostdb();
+
+eprintf ("ophnt %s\n", tcp_hostdb);
+	if (hostf == NULL)
+	    hostf = ku_fopen (tcp_hostdb(), "r");
+}
+
+
+/* TCP_CLHNT -- Close the host name table file.
+ */
+tcp_clhnt()
+{
+	if (hostf) {
+	    ku_fclose (hostf);
+	    hostf = NULL;
+	}
+}
+
+
+/* TCP_LOCATE -- Return a pointer to the first character in the indicated
+ * character class.
+ */
+static char *
+tcp_locate (cp, match)
+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);
+}