forked from TencentOS/TencentOS-kernel
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
#include <linux/tkernel.h>
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#include <linux/seq_file.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#define RELEASE_SUFFIX_MAX_LENS 16
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int release_suffix = 0;
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static int release_suffix_proc_show(struct seq_file *m, void *v)
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{
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seq_printf(m, "%d\n", release_suffix);
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return 0;
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}
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static int release_suffix_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, release_suffix_proc_show, NULL);
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}
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static ssize_t release_suffix_proc_write(struct file *file, const char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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char buf[8] = {0};
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if (cnt != 2){
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return -EINVAL;
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}
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if (copy_from_user(buf, ubuf, cnt))
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return -EFAULT;
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if (*buf == '0'){
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release_suffix = 0;
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}else if(*buf == '1'){
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release_suffix = 1;
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}else{
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return -EINVAL;
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}
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return cnt;
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}
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static const struct file_operations release_suffix_proc_fops = {
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.open = release_suffix_proc_open,
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.read = seq_read,
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.write = release_suffix_proc_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init proc_release_suffix_init(void)
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{
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proc_create("release_suffix", 0, proc_tkernel, &release_suffix_proc_fops);
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return 0;
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}
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late_initcall(proc_release_suffix_init);
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