apio/Luna
1
1
Fork 0
Code Issues Pull Requests Actions Projects Releases 8 Wiki Activity

Kernel, libc: Add O_APPEND and stub out O_CREAT and O_TRUNC

Browse Source
This commit is contained in:
apio 2022-10-27 07:43:55 +02:00
parent 651ffe6d64
commit a3c6635f3e
2 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
kernel/src/sys/stdio.cpp
View File

@ -17,6 +17,9 @@
#define OPEN_NONBLOCK 4
#define OPEN_CLOEXEC 8
#define OPEN_DIRECTORY 16
#define OPEN_TRUNCATED 32
#define OPEN_CREATE 64
#define OPEN_APPEND 128
#define SEEK_SET 0
#define SEEK_CUR 1
@ -154,6 +157,8 @@ void sys_open(Context* context, const char* filename, int flags)
VFS::Node* node = VFS::resolve_path(kfilename);
if (!node)
{
bool create = (flags & OPEN_CREATE) > 0;
if (create) kwarnln("FIXME: open(O_CREAT) is not implemented");
kfree(kfilename);
context->rax = -ENOENT;
return;
@ -173,6 +178,17 @@ void sys_open(Context* context, const char* filename, int flags)
bool only_directory = (flags & OPEN_DIRECTORY) > 0;
bool truncate = (flags & OPEN_TRUNCATED) > 0;
if (truncate)
{
kfree(kfilename);
kerrorln("FIXME: open(O_TRUNC) is not implemented");
context->rax = -ENOTSUP;
return;
}
bool append = (flags & OPEN_APPEND) > 0;
if (only_directory && node->type != VFS_DIRECTORY)
{
kfree(kfilename);
@ -188,6 +204,12 @@ void sys_open(Context* context, const char* filename, int flags)
kfree(kfilename);
current_task->files[fd].open(node, can_read, can_write, able_to_block, close_on_exec);
if (append && current_task->files[fd].node()->type != VFS_DEVICE)
{
current_task->files[fd].seek((long)current_task->files[fd].length());
}
context->rax = fd;
return;
}

6
libs/libc/include/fcntl.h
View File

@ -13,6 +13,12 @@
#define O_CLOEXEC 8
/* Refuse to open the file if it is not a directory. */
#define O_DIRECTORY 16
/* Truncate the file on open. */
#define O_TRUNC 32
/* Create the file if it doesn't exist. */
#define O_CREAT 64
/* Open the file for appending. */
#define O_APPEND 128
/* Duplicate a file descriptor. */
#define F_DUPFD 0