问题

I use the rename() function, but it renames files only in the program directory. How can I point her to a file outside the program folder?

我使用rename()函数，但它只能重命名程序目录中的文件。如何将其指向程序文件夹之外的文件？

I tried to give an input string like
"/home/user/folder/file.txt"
"~/folder/file.txt"
But it still gave an error that the file was not found.

我尝试提供类似的输入字符串
"/home/user/folder/file.txt"
"~/folder/file.txt"
但它仍然报错文件未找到。

#include<stdio.h>
#include<errno.h>

int main(){
    char oldn[256]="~/testfolder/oldname.txt";
    char newn[256]="~/testfolder/newname.txt";
    int ret = rename(oldn, newn);

    if(ret!=0){
        fprintf(stderr, "Cant rename! Error: %d\n", errno);
        perror("error msg");
    }
}

#include<stdio.h>
#include<errno.h>

int main(){
    char oldn[256]="~/testfolder/oldname.txt";
    char newn[256]="~/testfolder/newname.txt";
    int ret = rename(oldn, newn);

    if(ret!=0){
        fprintf(stderr, "Cant rename! Error: %d\n", errno);
        perror("error msg");
    }
}

答案1

得分: 1

"getenv("HOME")" 正在为我工作，以及其他路径如 "home/user/folder/file.txt"。