1 files changed, 6 insertions, 1 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));