Question

我编写了一个C程序，用于显示用户提供给它的根文件的路径。但是，我在使用opendir / readdir和相应的direntp比较Inode号时遇到问题。主要是，当我使用这些来编写（struct）stat时，inode数量与我没有使用它们的情况大不相同。

我在每行旁边放了评论，说明每个人做了什么，并在本文的底部包含了该程序的输出。任何帮助解决这个问题都将非常感激。

int main(int argc, char* argv[]){
int found = 0;    //declaring stuff
struct stat D; 
struct stat ES; 
struct dirent* direntD; 
struct dirent* direntE; 
DIR* dirp;
char currDir[1024];
char newDir[1024];

stat(argv[1], &D);    //load the starting directory into a stat struct 
printf("loaded %s into D\n", argv[1]);    //prints out the directory that has been inputted
printf("Inode number is %ld\n", (long) D.st_ino);    //prints out the inode number

strcpy(newDir, currDir);    //make the path to the parent directory
strcat(newDir, "/..");

printf("%s\n", currDir);    //print out the starting and parent directories
printf("%s\n", newDir);

dirp = opendir(newDir);    //open the parent
while ((direntE = readdir(dirp)) != NULL){    //read the files in the parent
    printf("%s\n", direntE->d_name);    //print names of files in the parent
        stat(direntE->d_name, &ES);    //load file into stat struct ES
        if(ES.st_dev == D.st_dev){    //compare device numbers
            printf("st_dev are the same\n");    //if true, print this
            if(ES.st_ino == D.st_ino){    //compare inode numbers
                printf("st_ino are the same\n");    //if true, print this
                printf("The child Dir is %s\n", direntE->d_name);    //also print the file/directory in the parent that links to the child
                found = 1;    //variable that says i've found what i want
            } else {
                found = 0;
            }
        } else {
            found = 0;
        }
        printf("%ld\n", (long) ES.st_ino);    //printing these to check they both match
        printf("%ld\n", (long) D.st_ino);

        }
    closedir(dirp);    //close dir
}

终端输出

./pathto /usr (pathto is the name of my program, starting in root/usr)
loaded /usr into D 
Inode number is 131073 
/usr
/usr/..
home
0
131073
root
0
131073
..
st_dev are the same
3408247
131073
usr
st_dev are the same
3408247
131073
.
st_dev are the same
3679535
131073

使用dirent的C root inode编号不同

0 个答案: