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write syscall: support O_APPEND

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Matheus
2023-09-09 13:29:14 -03:00
parent 09bfc5cde4
commit 15a26b5af5
1 changed files with 10 additions and 0 deletions
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kernel-src/sys/syscalls/write.c
+10
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@@ -26,6 +26,16 @@ syscallret_t syscall_write(context_t *context, int fd, void *buffer, size_t size
size_t byteswritten; size_t byteswritten;
uintmax_t offset = file->offset; uintmax_t offset = file->offset;
if (file->flags & O_APPEND) {
vattr_t attr;
ret.errno = VOP_GETATTR(file->vnode, &attr, &_cpu()->thread->proc->cred);
if (ret.errno)
goto cleanup;
offset = attr.size;
}
ret.errno = vfs_write(file->vnode, kernelbuff, size, offset, &byteswritten, fileflagstovnodeflags(file->flags)); ret.errno = vfs_write(file->vnode, kernelbuff, size, offset, &byteswritten, fileflagstovnodeflags(file->flags));
if (ret.errno) if (ret.errno)