diff options
Diffstat (limited to 'src/stdio/fileno.c')
| -rw-r--r-- | src/stdio/fileno.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/stdio/fileno.c b/src/stdio/fileno.c index 9ffb26d5..ba7f9391 100644 --- a/src/stdio/fileno.c +++ b/src/stdio/fileno.c @@ -2,6 +2,11 @@ int fileno(FILE *f) { + /* f->fd never changes, but the lock must be obtained and released + * anyway since this function cannot return while another thread + * holds the lock. */ + FLOCK(f); + FUNLOCK(f); return f->fd; } |