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#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (argc == 1) {
printf("stat <file>\n");
return 1;
}
struct stat st;
int rc = lstat(argv[1], &st);
if (rc < 0) {
perror("lstat");
return 1;
}
printf(" File: %s\n", argv[1]);
printf(" Inode: %u\n", st.st_ino);
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
printf(" Device: %u,%u\n", major(st.st_rdev), minor(st.st_rdev));
else
printf(" Size: %u\n", st.st_size);
printf(" Links: %u\n", st.st_nlink);
printf(" Blocks: %u\n", st.st_blocks);
printf(" UID: %u", st.st_uid);
if (auto* pwd = getpwuid(st.st_uid)) {
printf(" (%s)", pwd->pw_name);
}
printf("\n");
printf(" GID: %u", st.st_gid);
if (auto* grp = getgrgid(st.st_gid)) {
printf(" (%s)", grp->gr_name);
}
printf("\n");
printf(" Mode: (%o/", st.st_mode);
if (S_ISDIR(st.st_mode))
printf("d");
else if (S_ISLNK(st.st_mode))
printf("l");
else if (S_ISBLK(st.st_mode))
printf("b");
else if (S_ISCHR(st.st_mode))
printf("c");
else if (S_ISFIFO(st.st_mode))
printf("f");
else if (S_ISSOCK(st.st_mode))
printf("s");
else if (S_ISREG(st.st_mode))
printf("-");
else
printf("?");
printf("%c%c%c%c%c%c%c%c",
st.st_mode & S_IRUSR ? 'r' : '-',
st.st_mode & S_IWUSR ? 'w' : '-',
st.st_mode & S_ISUID ? 's' : (st.st_mode & S_IXUSR ? 'x' : '-'),
st.st_mode & S_IRGRP ? 'r' : '-',
st.st_mode & S_IWGRP ? 'w' : '-',
st.st_mode & S_ISGID ? 's' : (st.st_mode & S_IXGRP ? 'x' : '-'),
st.st_mode & S_IROTH ? 'r' : '-',
st.st_mode & S_IWOTH ? 'w' : '-');
if (st.st_mode & S_ISVTX)
printf("t");
else
printf("%c", st.st_mode & S_IXOTH ? 'x' : '-');
printf(")\n");
auto print_time = [](time_t t) {
auto* tm = localtime(&t);
printf("%4u-%02u-%02u %02u:%02u:%02u\n",
tm->tm_year + 1900,
tm->tm_mon + 1,
tm->tm_mday,
tm->tm_hour,
tm->tm_min,
tm->tm_sec);
};
printf("Accessed: ");
print_time(st.st_atime);
printf("Modified: ");
print_time(st.st_mtime);
printf(" Changed: ");
print_time(st.st_ctime);
return 0;
}
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