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-rw-r--r--libc/inet/getnetent.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/libc/inet/getnetent.c b/libc/inet/getnetent.c
new file mode 100644
index 000000000..a4b9f602c
--- /dev/null
+++ b/libc/inet/getnetent.c
@@ -0,0 +1,116 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+
+#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];
+static char *any(char *, char *);
+
+int _net_stayopen;
+
+void
+setnetent(f)
+ int f;
+{
+ if (netf == NULL)
+ netf = fopen(NETDB, "r" );
+ else
+ rewind(netf);
+ _net_stayopen |= f;
+}
+
+void
+endnetent()
+{
+ if (netf) {
+ fclose(netf);
+ netf = NULL;
+ }
+ _net_stayopen = 0;
+}
+
+struct netent *
+getnetent()
+{
+ char *p;
+ register char *cp, **q;
+
+ if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL)
+ return (NULL);
+again:
+ p = fgets(line, BUFSIZ, netf);
+ if (p == NULL)
+ 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;
+ return (&net);
+}
+
+static char *
+any(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);
+}