69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
#include "fs/VFS.h"
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#include "interrupts/Context.h"
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#include "std/errno.h"
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#include "std/stdlib.h"
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#include "sys/UserMemory.h"
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#include "thread/Scheduler.h"
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typedef unsigned long off_t;
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typedef unsigned short mode_t;
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typedef unsigned long ino_t;
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struct stat // FIXME: This struct is quite stubbed out.
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{
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ino_t st_ino;
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mode_t st_mode;
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off_t st_size;
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int st_dev; // FIXME: Implement this.
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};
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void do_stat(Context* context, VFS::Node* node, struct stat* buf)
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{
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struct stat* kstat = obtain_user_ref(buf);
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if (!kstat)
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{
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context->rax = -EFAULT; // FIXME: The manual doesn't say fstat can return EFAULT, but it seems logical here...
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return;
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}
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kstat->st_ino = node->inode;
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kstat->st_mode = (mode_t)node->type;
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kstat->st_size = node->length;
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release_user_ref(kstat);
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context->rax = 0;
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}
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void sys_fstat(Context* context, int fd, struct stat* buf)
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{
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Task* current_task = Scheduler::current_task();
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if (fd < 0 || fd >= TASK_MAX_FDS)
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{
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context->rax = -EBADF;
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return;
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}
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Descriptor& file = current_task->files[fd];
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if (!file.is_open())
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{
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context->rax = -EBADF;
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return;
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}
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VFS::Node* node = file.node();
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return do_stat(context, node, buf);
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}
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void sys_stat(Context* context, const char* path, struct stat* buf)
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{
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char* kpath = strdup_from_user(path);
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if (!kpath)
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{
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context->rax = -EFAULT;
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return;
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}
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VFS::Node* node = VFS::resolve_path(kpath);
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kfree(kpath);
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if (!node)
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{
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context->rax = -ENOENT;
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return;
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}
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return do_stat(context, node, buf);
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} |