1 files changed, 215 insertions, 0 deletions

diff --git a/usr.sbin/ppp/systems.c b/usr.sbin/ppp/systems.c
new file mode 100644
index 0000000..3f0ad82
--- /dev/null
+++ b/usr.sbin/ppp/systems.c
@@ -0,0 +1,215 @@
+/*
+ *	          System configuration routines
+ *
+ *	    Written by Toshiharu OHNO (tony-o@iij.ad.jp)
+ *
+ *   Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
+ *
+ * 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 Internet Initiative Japan, Inc.  The name of the
+ * IIJ 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.
+ * 
+ * $Id:$
+ *
+ *  TODO:
+ */
+#include "fsm.h"
+#include "vars.h"
+#include "ipcp.h"
+
+extern void DecodeCommand();
+
+static int uid, gid;
+static int euid, egid;
+static int usermode;
+
+void
+GetUid()
+{
+  uid = getuid();
+  gid = getgid();
+  euid = geteuid();
+  egid = getegid();
+  usermode = 0;
+}
+
+static void
+SetUserId()
+{
+  if (!usermode) {
+#ifdef __FreeBSD__
+    setruid(euid);
+    seteuid(uid);
+    setrgid(egid);
+    setegid(gid);
+#else
+    setreuid(euid, uid);
+    setregid(egid, gid);
+#endif
+    usermode = 1;
+  }
+}
+
+static void
+SetPppId()
+{
+  if (usermode) {
+#ifdef __FreeBSD__
+    setruid(uid);
+    seteuid(euid);
+    setrgid(gid);
+    setegid(egid);
+#else
+    setreuid(uid, euid);
+    setregid(gid, egid);
+#endif
+    usermode = 0;
+  }
+}
+
+FILE *
+OpenSecret(file)
+char *file;
+{
+  FILE *fp;
+  char *cp;
+  char line[100];
+
+  fp = NULL;
+  cp = getenv("HOME");
+  if (cp) {
+    SetUserId();
+    sprintf(line, "%s/.%s", cp, file);
+    fp = fopen(line, "r");
+  }
+  if (fp == NULL) {
+    SetPppId();
+    sprintf(line, "/etc/iijppp/%s", file);
+    fp = fopen(line, "r");
+  }
+  if (fp == NULL) {
+    fprintf(stderr, "can't open %s.\n", line);
+    SetPppId();
+    return(NULL);
+  }
+  return(fp);
+}
+
+void
+CloseSecret(fp)
+FILE *fp;
+{
+  fclose(fp);
+  SetPppId();
+}
+
+int
+SelectSystem(name, file)
+char *name;
+char *file;
+{
+  FILE *fp;
+  char *cp, *wp;
+  int n;
+  int val = -1;
+  char line[200];
+
+  fp = NULL;
+  cp = getenv("HOME");
+  if (cp) {
+    SetUserId();
+    sprintf(line, "%s/.%s", cp, file);
+    fp = fopen(line, "r");
+  }
+  if (fp == NULL) {
+    SetPppId();		/* fix from pdp@ark.jr3uom.iijnet.or.jp */
+    sprintf(line, "/etc/iijppp/%s", file);
+    fp = fopen(line, "r");
+  }
+  if (fp == NULL) {
+    fprintf(stderr, "can't open %s.\n", line);
+    SetPppId();
+    return(-1);
+  }
+#ifdef DEBUG
+  fprintf(stderr, "checking %s (%s).\n", name, line);
+#endif
+  while (fgets(line, sizeof(line), fp)) {
+    cp = line;
+    switch (*cp) {
+    case '#':		/* comment */
+      break;
+    case ' ':
+    case '\t':
+      break;
+    default:
+      wp = strpbrk(cp, ":\n");
+      *wp = '\0';
+      if (strcmp(cp, name) == 0) {
+	while (fgets(line, sizeof(line), fp)) {
+	  cp = line;
+	  if (*cp == ' ' || *cp == '\t') {
+	    n = strspn(cp, " \t");
+	    cp += n;
+#ifdef DEBUG
+	    fprintf(stderr, "%s", cp);
+#endif
+	    SetPppId();
+	    DecodeCommand(cp, strlen(cp), 0);
+	    SetUserId();
+	  } else if (*cp == '#') {
+	    continue;
+	  } else
+	    break;
+	}
+	fclose(fp);
+	SetPppId();
+	return(0);
+      }
+      break;
+    }
+  }
+  fclose(fp);
+  SetPppId();
+  return(val);
+}
+
+int
+LoadCommand(list, argc, argv)
+struct cmdtab *list;
+int argc;
+char **argv;
+{
+  char *name;
+
+  if (argc > 0)
+    name = *argv;
+  else
+    name = "default";
+
+  if (SelectSystem(name, CONFFILE) < 0) {
+    printf("%s: not found.\n", name);
+    return(-1);
+  }
+  return(1);
+}
+
+extern struct in_addr ifnetmask;
+
+int
+SaveCommand(list, argc, argv)
+struct cmdtab *list;
+int argc;
+char **argv;
+{
+  printf("save command is not implemented (yet).\n");
+  return(1);
+}