vfs: Force truncation even without permissions

O_TRUNC as a mode does not seem to imply write permissions
but we still wish to truncate the file before giving back a file
descriptor. Therefore the kernel can now override any permission checks
if it wishes to do a truncation while still using the "ordinary path".

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/cpu/syscall.c b/kernel/cpu/syscall.c
index 284a80d..a78e63e 100644
--- a/kernel/cpu/syscall.c
+++ b/kernel/cpu/syscall.c
@@ -152,7 +152,7 @@ int syscall_fstat(int fd, struct stat *buf) {
 }
 
 int syscall_ftruncate(int fd, size_t length) {
-  return vfs_ftruncate(fd, length);
+  return vfs_ftruncate(fd, length, 0);
 }
 
 char *syscall_getcwd(char *buf, size_t size) {