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-rw-r--r--editors/vi.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/editors/vi.c b/editors/vi.c
index 454cfce..4e5a5ac 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -2437,11 +2437,16 @@ static int file_write(char * fn, char * first, char * last)
return -2;
}
charcnt = 0;
- fd = open(fn, (O_WRONLY | O_CREAT | O_TRUNC), 0666);
+ /* By popular request we do not open file with O_TRUNC,
+ * but instead ftruncate() it _after_ successful write.
+ * Might reduce amount of data lost on power fail etc.
+ */
+ fd = open(fn, (O_WRONLY | O_CREAT), 0666);
if (fd < 0)
return -1;
cnt = last - first + 1;
charcnt = full_write(fd, first, cnt);
+ ftruncate(fd, charcnt);
if (charcnt == cnt) {
// good write
//file_modified = FALSE; // the file has not been modified