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-rw-r--r--src/main.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/main.c b/src/main.c
index c7669ad11..ddca73322 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4991,7 +4991,14 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
fflush(outs.stream);
/* truncate file at the position where we started appending */
#ifdef HAVE_FTRUNCATE
- ftruncate( fileno(outs.stream), outs.init);
+ if(ftruncate( fileno(outs.stream), outs.init)) {
+ /* when truncate fails, we can't just append as then we'll
+ create something strange, bail out */
+ if(!config->mute)
+ fprintf(config->errors,
+ "failed to truncate, exiting\n");
+ break;
+ }
/* now seek to the end of the file, the position where we
just truncated the file in a large file-safe way */
fseek(outs.stream, 0, SEEK_END);