user/bin/stat.c


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#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>

const char *modestr(int mode)
{
    switch (mode)
    {
    case S_IFCHR:
        return "Character device";
    case S_IFBLK:
        return "Block device";
    case S_IFDIR:
        return "Directory";
    case S_IFREG:
        return "Regular file";
    case S_IFLNK:
        return "Symbolic link";
    default:
        return "Unknown";
    }
}

int main(int argc, char **argv)
{
    if (argc != 2)
    {
        printf("usage: stat file\n");
        return 1;
    }

    stat_t ss;
    int rc = stat(argv[1], &ss);
    if (rc == -1)
    {
        printf("stat: %s\n", strerror(errno));
        return 1;
    }

    printf("      File: %s\n", argv[1]);
    printf("      Type: %s\n", modestr(ss.st_mode));
    printf("     Inode: %d\n", ss.st_ino);
    printf("Link count: %d\n", ss.st_nlink);
    printf("      Size: %d\n", ss.st_size);
    printf("    Blocks: %d\n", ss.st_blocks);
    return 0;
}