+
+/*
+ * script_setenv - set an environment variable value to be used
+ * for scripts that we run (e.g. ip-up, auth-up, etc.)
+ */
+void
+script_setenv(var, value)
+ char *var, *value;
+{
+ size_t vl = strlen(var) + strlen(value) + 2;
+ int i;
+ char *p, *newstring;
+
+ newstring = (char *) malloc(vl);
+ if (newstring == 0)
+ return;
+ slprintf(newstring, vl, "%s=%s", var, value);
+
+ /* check if this variable is already set */
+ if (script_env != 0) {
+ for (i = 0; (p = script_env[i]) != 0; ++i) {
+ if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
+ free(p);
+ script_env[i] = newstring;
+ return;
+ }
+ }
+ } else {
+ i = 0;
+ script_env = (char **) malloc(16 * sizeof(char *));
+ if (script_env == 0)
+ return;
+ s_env_nalloc = 16;
+ }
+
+ /* reallocate script_env with more space if needed */
+ if (i + 1 >= s_env_nalloc) {
+ int new_n = i + 17;
+ char **newenv = (char **) realloc((void *)script_env,
+ new_n * sizeof(char *));
+ if (newenv == 0)
+ return;
+ script_env = newenv;
+ s_env_nalloc = new_n;
+ }
+
+ script_env[i] = newstring;
+ script_env[i+1] = 0;
+}
+
+/*
+ * script_unsetenv - remove a variable from the environment
+ * for scripts.
+ */
+void
+script_unsetenv(var)
+ char *var;
+{
+ int vl = strlen(var);
+ int i;
+ char *p;
+
+ if (script_env == 0)
+ return;
+ for (i = 0; (p = script_env[i]) != 0; ++i) {
+ if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
+ free(p);
+ while ((script_env[i] = script_env[i+1]) != 0)
+ ++i;
+ break;
+ }
+ }
+}
+
+/*
+ * strlcpy - like strcpy/strncpy, doesn't overflow destination buffer,
+ * always leaves destination null-terminated (for len > 0).
+ */
+void
+strlcpy(char *dest, size_t len, const char *src)
+{
+ if (len == 0)
+ return;
+ if (strlen(src) < len)
+ strcpy(dest, src);
+ else {
+ strncpy(dest, src, len - 1);
+ dest[len-1] = 0;
+ }
+}
+
+/*
+ * strlcat - like strcat/strncat, doesn't overflow destination buffer,
+ * always leaves destination null-terminated (for len > 0).
+ */
+void
+strlcat(char *dest, size_t len, const char *src)
+{
+ size_t dlen;
+
+ if (len == 0)
+ return;
+ dlen = strlen(dest);
+ if (dlen < len - 1)
+ strlcpy(dest + dlen, len - dlen, src);
+}
+
+/*
+ * fatal - log an error message and die horribly.
+ */
+void
+fatal __V((char *fmt, ...))
+{
+ va_list pvar;
+
+#if __STDC__
+ va_start(pvar, fmt);
+#else
+ char *fmt;
+ va_start(pvar);
+ fmt = va_arg(pvar, char *);
+#endif
+
+ vslprintf(line, sizeof(line), fmt, pvar);
+ va_end(pvar);
+
+ syslog(LOG_ERR, "%s", line);
+
+ die(1); /* as promised */
+}
+
+/*
+ * error - log an error message.
+ */
+void
+error __V((char *fmt, ...))
+{
+ va_list pvar;
+
+#if __STDC__
+ va_start(pvar, fmt);
+#else
+ char *fmt;
+ va_start(pvar);
+ fmt = va_arg(pvar, char *);
+#endif
+
+ vslprintf(line, sizeof(line), fmt, pvar);
+ va_end(pvar);
+
+ syslog(LOG_ERR, "%s", line);
+}
+
+/*
+ * warn - log a warning message.
+ */
+void
+warn __V((char *fmt, ...))
+{
+ va_list pvar;
+
+#if __STDC__
+ va_start(pvar, fmt);
+#else
+ char *fmt;
+ va_start(pvar);
+ fmt = va_arg(pvar, char *);
+#endif
+
+ vslprintf(line, sizeof(line), fmt, pvar);
+ va_end(pvar);
+
+ syslog(LOG_WARNING, "%s", line);
+}
+
+/*
+ * notice - log a notice-level message.
+ */
+void
+notice __V((char *fmt, ...))
+{
+ va_list pvar;
+
+#if __STDC__
+ va_start(pvar, fmt);
+#else
+ char *fmt;
+ va_start(pvar);
+ fmt = va_arg(pvar, char *);
+#endif
+
+ vslprintf(line, sizeof(line), fmt, pvar);
+ va_end(pvar);
+
+ syslog(LOG_NOTICE, "%s", line);
+}
+
+/*
+ * info - log an informational message.
+ */
+void
+info __V((char *fmt, ...))
+{
+ va_list pvar;
+
+#if __STDC__
+ va_start(pvar, fmt);
+#else
+ char *fmt;
+ va_start(pvar);
+ fmt = va_arg(pvar, char *);
+#endif
+
+ vslprintf(line, sizeof(line), fmt, pvar);
+ va_end(pvar);
+
+ syslog(LOG_INFO, "%s", line);
+}
+
+/*
+ * dbglog - log a debug message.
+ */
+void
+dbglog __V((char *fmt, ...))
+{
+ va_list pvar;
+
+#if __STDC__
+ va_start(pvar, fmt);
+#else
+ char *fmt;
+ va_start(pvar);
+ fmt = va_arg(pvar, char *);
+#endif
+
+ vslprintf(line, sizeof(line), fmt, pvar);
+ va_end(pvar);
+
+ syslog(LOG_DEBUG, "%s", line);
+}