diff options
| -rw-r--r-- | sys/kern/kern_filedesc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sys/kern/kern_filedesc.c b/sys/kern/kern_filedesc.c index f7ca2c8..203eefc 100644 --- a/sys/kern/kern_filedesc.c +++ b/sys/kern/kern_filedesc.c @@ -331,19 +331,24 @@ read(int fd, void *buf, size_t count) return -EBADF; } + mutex_acquire(&fd_desc->lock); if (fd_desc->oflag == O_WRONLY) { - return -EACCES; + bytes_read = -EACCES; + goto done; } sio.offset = fd_desc->offset; vnode = fd_desc->vnode; if (count > MAX_RW_SIZE) { - return -EINVAL; + bytes_read = -EACCES; + goto done; } bytes_read = vfs_read(vnode, &sio); fd_desc->offset += bytes_read; +done: + mutex_release(&fd_desc->lock); return bytes_read; } |