Proper check and dropin replacement for usleep().

[oweals/tinc.git] / lib / dropin.c

diff --git a/lib/dropin.c b/lib/dropin.c
index 22bc812fd718b5ded4a4b6691f35bee6c42b24e2..1bad05cd43e6fee4c88937f0a69577741819aca6 100644 (file)
--- a/lib/dropin.c
+++ b/lib/dropin.c
@@ -1,7 +1,7 @@
 /*
     dropin.c -- a set of drop-in replacements for libc functions
-    Copyright (C) 2000,2001 Ivo Timmermans <ivo@o2w.nl>,
-                  2000,2001 Guus Sliepen <guus@sliepen.eu.org>
+    Copyright (C) 2000-2005 Ivo Timmermans,
+                  2000-2009 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -13,27 +13,14 @@
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-    $Id: dropin.c,v 1.1.2.12 2002/09/09 21:49:16 guus Exp $
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#include "config.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-
-#include <xalloc.h>
+#include "system.h"
 
-#include <system.h>
-#include <errno.h>
+#include "xalloc.h"
 
 #ifndef HAVE_DAEMON
 /*
@@ -49,8 +36,8 @@
   Unless the argument noclose is non-zero, daemon() will redirect
   standard input, standard output and standard error to /dev/null.
 */
-int daemon(int nochdir, int noclose)
-{
+int daemon(int nochdir, int noclose) {
+#ifdef HAVE_FORK
        pid_t pid;
        int fd;
 
@@ -93,6 +80,9 @@ int daemon(int nochdir, int noclose)
        }
 
        return 0;
+#else
+       return -1;
+#endif
 }
 #endif
 
@@ -104,8 +94,7 @@ int daemon(int nochdir, int noclose)
   current directory name.  If the environment variable PWD is set, and
   its value is correct, then that value will be returned.
 */
-char *get_current_dir_name(void)
-{
+char *get_current_dir_name(void) {
        size_t size;
        char *buf;
        char *r;
@@ -132,29 +121,53 @@ char *get_current_dir_name(void)
 #endif
 
 #ifndef HAVE_ASPRINTF
-int asprintf(char **buf, const char *fmt, ...)
-{
-       int status;
+int asprintf(char **buf, const char *fmt, ...) {
+       int result;
        va_list ap;
+       va_start(ap, fmt);
+       result = vasprintf(buf, fmt, ap);
+       va_end(ap);
+       return result;
+}
+
+int vasprintf(char **buf, const char *fmt, va_list ap) {
+       int status;
+       va_list aq;
        int len;
 
        len = 4096;
        *buf = xmalloc(len);
 
-       va_start(ap, fmt);
-       status = vsnprintf(*buf, len, fmt, ap);
-       va_end(ap);
+       va_copy(aq, ap);
+       status = vsnprintf(*buf, len, fmt, aq);
+       va_end(aq);
 
        if(status >= 0)
-               *buf = xrealloc(*buf, status);
+               *buf = xrealloc(*buf, status + 1);
 
        if(status > len - 1) {
                len = status;
-               va_start(ap, fmt);
-               status = vsnprintf(*buf, len, fmt, ap);
-               va_end(ap);
+               va_copy(aq, ap);
+               status = vsnprintf(*buf, len, fmt, aq);
+               va_end(aq);
        }
 
        return status;
 }
 #endif
+
+#ifndef HAVE_GETTIMEOFDAY
+int gettimeofday(struct timeval *tv, void *tz) {
+       tv->tv_sec = time(NULL);
+       tv->tv_usec = 0;
+       return 0;
+}
+#endif
+
+#ifndef HAVE_USLEEP
+int usleep(long usec) {
+       struct timeval tv = {usec / 1000000, (usec / 1000) % 1000};
+       select(0, NULL, NULL, NULL, &tv);
+       return 0;
+}
+#endif