Solution for Exercise 23-3

ex2303

#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <time.h>
#include <sys/stat.h>

int main()
{
    DIR *folder;
    struct dirent *file;
    struct stat filestat;

    folder=opendir(".");
    if(folder==NULL)
    {
        puts("Unable to read directory");
        exit(1);
    }
    while( (file = readdir(folder)) != NULL )
    {
      stat(file->d_name,&filestat);
      printf("%-14s %5ld %s",
            file->d_name,
            filestat.st_size,
            ctime(&filestat.st_mtime));
    }
    closedir(folder);
    return(0);
}

Output

.                384 Thu May 21 21:27:11 2020
..               832 Thu May 21 15:08:14 2020
listing2305.c    355 Thu May 21 15:36:29 2020
ex2303.c         564 Thu May 21 21:27:10 2020
listing2301.c    350 Thu May 21 15:32:52 2020
listing2306.c    222 Thu May 21 15:37:01 2020
listing2302.c    558 Thu May 21 21:22:12 2020
ex2301.c         350 Thu May 21 20:49:38 2020
a.out          12924 Thu May 21 21:27:11 2020
listing2303.c    357 Thu May 21 15:34:55 2020
ex2302.c         360 Thu May 21 20:57:01 2020
listing2304.c    381 Thu May 21 15:35:48 2020

Notes

* On the Macintosh, you may see a warning for Line 24. In OS X, the st_size member of the stat structure is a long long data type. To address this error, typecast the filestat.st_size variable at Line 24 as follows:

(long)filestat.st_size,

* You can change the width values at Line 22 if the output looks too cluttered.

Exercise ex2304 →