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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#include "proc.h"
#include "procfs.h"
#include <rthw.h>
#include <rtdbg.h>
#include <fcntl.h>
#include <errno.h>
#include <dfs_dentry.h>
#include <dfs_mnt.h>
static void mnt_escape(const char *source, char *target, rt_size_t target_size)
{
rt_size_t offset = 0;
const char *cursor = source ? source : "";
if (target_size == 0)
{
return;
}
while (*cursor != '\0')
{
const char *escape = RT_NULL;
rt_size_t need = 1;
if (*cursor == ' ')
{
escape = "\\040";
need = 4;
}
else if (*cursor == '\t')
{
escape = "\\011";
need = 4;
}
else if (*cursor == '\n')
{
escape = "\\012";
need = 4;
}
else if (*cursor == '\\')
{
escape = "\\134";
need = 4;
}
if (offset + need >= target_size)
{
break;
}
if (escape)
{
target[offset++] = escape[0];
target[offset++] = escape[1];
target[offset++] = escape[2];
target[offset++] = escape[3];
}
else
{
target[offset++] = *cursor;
}
cursor++;
}
target[offset] = '\0';
}
const char *mnt_flag(int flag)
{
if (flag & MNT_RDONLY)
{
return "ro";
}
return "rw";
}
static struct dfs_mnt* mnt_show(struct dfs_mnt *mnt, void *parameter)
{
struct dfs_seq_file *seq = (struct dfs_seq_file *)parameter;
char source[DFS_PATH_MAX];
char target[DFS_PATH_MAX];
const char *source_name;
const char *filesystem_name;
if (mnt && mnt->fs_ops && mnt->fullpath)
{
filesystem_name = mnt->fs_ops->name ? mnt->fs_ops->name : "unknown";
source_name = filesystem_name;
if (mnt->dev_id && mnt->dev_id->parent.name[0] != '\0')
{
source_name = mnt->dev_id->parent.name;
}
mnt_escape(source_name, source, sizeof(source));
mnt_escape(mnt->fullpath, target, sizeof(target));
dfs_seq_printf(seq, "%s %s %s %s 0 0\n", source, target,
filesystem_name, mnt_flag(mnt->flags));
}
return RT_NULL;
}
static void *seq_start(struct dfs_seq_file *seq, off_t *index)
{
off_t i = *index; // seq->index
return NULL + (i == 0);
}
static void seq_stop(struct dfs_seq_file *seq, void *data)
{
}
static void *seq_next(struct dfs_seq_file *seq, void *data, off_t *index)
{
/* data: The return value of the start or next*/
off_t i = *index + 1; // seq->index
*index = i;
return NULL;
}
static int seq_show(struct dfs_seq_file *seq, void *data)
{
/* data: The return value of the start or next*/
dfs_mnt_foreach(mnt_show, seq);
return 0;
}
static const struct dfs_seq_ops seq_ops = {
.start = seq_start,
.stop = seq_stop,
.next = seq_next,
.show = seq_show,
};
int proc_mounts_init(void)
{
struct proc_dentry *dentry = proc_create_data("mounts", 0, NULL, NULL, NULL);
if (dentry)
{
dentry->seq_ops = &seq_ops;
}
proc_release(dentry);
return 0;
}
INIT_ENV_EXPORT(proc_mounts_init);
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