From b38eb34d289866be7fd3adb1f005126facfcd280 Mon Sep 17 00:00:00 2001
From: tenox7 <as@tenoware.com>
Date: Tue, 1 May 2018 02:51:34 -0700
Subject: file locking support

---
 fileio.c | 7 ++++++-
 wfm.h    | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fileio.c b/fileio.c
index c703898..0e2b389 100644
--- a/fileio.c
+++ b/fileio.c
@@ -2,7 +2,6 @@
 
 #include "wfm.h"
 
-
 /*
 // Debug dump vars
 //void debugdumpvars(void) {
@@ -104,6 +103,9 @@ void receivefile(void) {
     if(!output) 
         error("Unable to open file %s for writing.<BR>%s", virt_filename, strerror(errno));
 
+    if(flock(fileno(output), LOCK_EX) == -1)
+        error("Unable to lock file %s.<BR>%s", virt_filename, strerror(errno));
+
     while(cgiFormFileRead(input, buff, sizeof(buff), &got) == cgiFormSuccess) 
         if(got)
             if(fwrite(buff, got, 1, output) != 1) 
@@ -221,6 +223,9 @@ void edit_save(void) {
     if(!tempf)
         error("Unable to open temporary file %s.<BR>%s", basename(tempname), strerror(errno));
 
+    if(flock(fileno(tempf), LOCK_EX) == -1)
+        error("Unable to lock file %s.<BR>%s", basename(tempname), strerror(errno));
+
     if(fwrite(buff, strlen(buff), 1, tempf) != 1)
         error("Unable to write to temporary file %s.<BR>%s", basename(tempname), strerror(errno));
 
diff --git a/wfm.h b/wfm.h
index 5657590..7e315bd 100644
--- a/wfm.h
+++ b/wfm.h
@@ -1,4 +1,4 @@
-#define VERSION "1.3.1"
+#define VERSION "1.3.2"
 #define copyright "<!-- WFM Version " VERSION ", Mountain View, CA, " __DATE__ " [" __TIME__ "] -->\n" \
                   "<!-- Copyright (c) 1994-2018 by Antoni Sawicki -->\n"
 
@@ -52,6 +52,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/shm.h>    
+#include <sys/file.h>
 //#include <sys/dir.h>
 #include "md5.h"
 #include "cgic.h"
-- 
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