From 8bf2f2a1e65935f1672e9cbce2b65c304654c966 Mon Sep 17 00:00:00 2001
From: mse5gj3yn <780736178@qq.com>
Date: Fri, 9 Jul 2021 00:10:27 +0800
Subject: [PATCH] ADD file via upload

---
 getdents_1.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 getdents_1.c

diff --git a/getdents_1.c b/getdents_1.c
new file mode 100644
index 0000000..ac64261
--- /dev/null
+++ b/getdents_1.c
@@ -0,0 +1,54 @@
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <a.out.h>
+
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <asm/segment.h>
+
+struct linux_dirent {
+	long           d_ino;
+	off_t          d_off;
+	unsigned short d_reclen;
+	char           d_name[14];
+};
+
+int sys_getdents(unsigned int fd, struct linux_dirent *d, unsigned int count)
+{
+    struct file  *f;
+	struct m_inode * m;
+    struct buffer_head * b;
+    struct dir_entry * dir;
+	int i,j,k,res;
+    struct linux_dirent usrd;
+    i=0;
+    res=0;
+    f=current->filp[fd];
+    m=f->f_inode;
+    b=bread(m->i_dev,m->i_zone[0]);
+    dir=(struct dir_entry*)b->b_data;
+    while(dir[i].inode>0)
+    {
+        if(res+sizeof(struct linux_dirent)>count)
+            break;
+        usrd.d_ino=dir[i].inode;
+        usrd.d_off=0;
+        usrd.d_reclen=sizeof(struct linux_dirent);
+        for(j=0;j<14;j++)
+            usrd.d_name[j]=dir[i].name[j];
+        for(k=0;k<sizeof(struct linux_dirent);k++)
+        {
+            put_fs_byte(((char*)(&usrd))[k],(char*)d+res);
+            res++;
+        }
+        i++;
+    }
+    if(count<=512)
+        return res;
+    else
+        return 0;
+}
+