Unix - Print number of hard link with stat and change format of ctime on output (Implementation of ls command...












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First thanks for your time then, my problem is i'm trying to implement ls command with a maximum of flags like (ls -laRt...). I understand the stat struct and all the time/ctime/strftime fonctions but when i want to print them on my output they give me a big number, so i found how to convert the timestamp of st_mtime with ctime but i want the result in "Month Day Hour:Minutes" like (ls -lRt)format without using strftime, it is possible or i have to implement this fonction too ? And the second question is, for my number of hard link how i convert the result print on my output something like "-77452048" into the "real" result ?



This is my main, i'm a begginer so i'm open to all critics thanks U !



#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <err.h>
#include <sys/stat.h>
#include <string.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include <stdint.h>

int main (int argc, char **argv)
{
DIR *dir;
struct dirent *d;
struct stat s;
char chemin[256];
struct passwd *p;
p = getpwuid(geteuid());
struct group *grp;
grp = getgrgid(getgrnam("."));

if (argc != 2)
{
perror("Filenamen");
exit(-1);
}

if ((dir=opendir(argv[1])) == NULL)
{
perror("opendir error");
exit(-1);
}

while ((d = readdir(dir)) != 0)
{
if(!strcmp (d->d_name, "."))
{
continue;
}
if(!strcmp (d->d_name, ".."))
{
continue;
}
strcpy (chemin, argv[1]);
strcat (chemin, "/");
strcat (chemin, d->d_name);
if (!stat(chemin, &s))
{
printf((S_ISDIR(s.st_mode)) ? "d" : "-");
printf((s.st_mode & S_IRUSR) ? "r" : "-");
printf((s.st_mode & S_IWUSR) ? "w" : "-");
printf((s.st_mode & S_IXUSR) ? "x" : "-");
printf((s.st_mode & S_IRGRP) ? "r" : "-");
printf((s.st_mode & S_IWGRP) ? "w" : "-");
printf((s.st_mode & S_IXGRP) ? "x" : "-");
printf((s.st_mode & S_IROTH) ? "r" : "-");
printf((s.st_mode & S_IWOTH) ? "w" : "-");
printf((s.st_mode & S_IXOTH) ? "x" : "-");
} else
{
perror("Erreur dans stat");
}
printf(" ");
printf("%d", &s.st_nlink);
printf(" ");
printf("%s", p->pw_name);
printf(" ");
printf("%s", grp->gr_name);
printf(" ");
printf("%d", &s.st_mtime);
printf(" ");
printf("%9jd", (intmax_t)s.st_size);
printf(" ");
printf("%s ", d->d_name);
printf("n");
}
closedir(dir);
}









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    0















    First thanks for your time then, my problem is i'm trying to implement ls command with a maximum of flags like (ls -laRt...). I understand the stat struct and all the time/ctime/strftime fonctions but when i want to print them on my output they give me a big number, so i found how to convert the timestamp of st_mtime with ctime but i want the result in "Month Day Hour:Minutes" like (ls -lRt)format without using strftime, it is possible or i have to implement this fonction too ? And the second question is, for my number of hard link how i convert the result print on my output something like "-77452048" into the "real" result ?



    This is my main, i'm a begginer so i'm open to all critics thanks U !



    #include <stdio.h>
    #include <stdlib.h>
    #include <dirent.h>
    #include <err.h>
    #include <sys/stat.h>
    #include <string.h>
    #include <time.h>
    #include <pwd.h>
    #include <grp.h>
    #include <stdint.h>

    int main (int argc, char **argv)
    {
    DIR *dir;
    struct dirent *d;
    struct stat s;
    char chemin[256];
    struct passwd *p;
    p = getpwuid(geteuid());
    struct group *grp;
    grp = getgrgid(getgrnam("."));

    if (argc != 2)
    {
    perror("Filenamen");
    exit(-1);
    }

    if ((dir=opendir(argv[1])) == NULL)
    {
    perror("opendir error");
    exit(-1);
    }

    while ((d = readdir(dir)) != 0)
    {
    if(!strcmp (d->d_name, "."))
    {
    continue;
    }
    if(!strcmp (d->d_name, ".."))
    {
    continue;
    }
    strcpy (chemin, argv[1]);
    strcat (chemin, "/");
    strcat (chemin, d->d_name);
    if (!stat(chemin, &s))
    {
    printf((S_ISDIR(s.st_mode)) ? "d" : "-");
    printf((s.st_mode & S_IRUSR) ? "r" : "-");
    printf((s.st_mode & S_IWUSR) ? "w" : "-");
    printf((s.st_mode & S_IXUSR) ? "x" : "-");
    printf((s.st_mode & S_IRGRP) ? "r" : "-");
    printf((s.st_mode & S_IWGRP) ? "w" : "-");
    printf((s.st_mode & S_IXGRP) ? "x" : "-");
    printf((s.st_mode & S_IROTH) ? "r" : "-");
    printf((s.st_mode & S_IWOTH) ? "w" : "-");
    printf((s.st_mode & S_IXOTH) ? "x" : "-");
    } else
    {
    perror("Erreur dans stat");
    }
    printf(" ");
    printf("%d", &s.st_nlink);
    printf(" ");
    printf("%s", p->pw_name);
    printf(" ");
    printf("%s", grp->gr_name);
    printf(" ");
    printf("%d", &s.st_mtime);
    printf(" ");
    printf("%9jd", (intmax_t)s.st_size);
    printf(" ");
    printf("%s ", d->d_name);
    printf("n");
    }
    closedir(dir);
    }









    share|improve this question

























      0












      0








      0








      First thanks for your time then, my problem is i'm trying to implement ls command with a maximum of flags like (ls -laRt...). I understand the stat struct and all the time/ctime/strftime fonctions but when i want to print them on my output they give me a big number, so i found how to convert the timestamp of st_mtime with ctime but i want the result in "Month Day Hour:Minutes" like (ls -lRt)format without using strftime, it is possible or i have to implement this fonction too ? And the second question is, for my number of hard link how i convert the result print on my output something like "-77452048" into the "real" result ?



      This is my main, i'm a begginer so i'm open to all critics thanks U !



      #include <stdio.h>
      #include <stdlib.h>
      #include <dirent.h>
      #include <err.h>
      #include <sys/stat.h>
      #include <string.h>
      #include <time.h>
      #include <pwd.h>
      #include <grp.h>
      #include <stdint.h>

      int main (int argc, char **argv)
      {
      DIR *dir;
      struct dirent *d;
      struct stat s;
      char chemin[256];
      struct passwd *p;
      p = getpwuid(geteuid());
      struct group *grp;
      grp = getgrgid(getgrnam("."));

      if (argc != 2)
      {
      perror("Filenamen");
      exit(-1);
      }

      if ((dir=opendir(argv[1])) == NULL)
      {
      perror("opendir error");
      exit(-1);
      }

      while ((d = readdir(dir)) != 0)
      {
      if(!strcmp (d->d_name, "."))
      {
      continue;
      }
      if(!strcmp (d->d_name, ".."))
      {
      continue;
      }
      strcpy (chemin, argv[1]);
      strcat (chemin, "/");
      strcat (chemin, d->d_name);
      if (!stat(chemin, &s))
      {
      printf((S_ISDIR(s.st_mode)) ? "d" : "-");
      printf((s.st_mode & S_IRUSR) ? "r" : "-");
      printf((s.st_mode & S_IWUSR) ? "w" : "-");
      printf((s.st_mode & S_IXUSR) ? "x" : "-");
      printf((s.st_mode & S_IRGRP) ? "r" : "-");
      printf((s.st_mode & S_IWGRP) ? "w" : "-");
      printf((s.st_mode & S_IXGRP) ? "x" : "-");
      printf((s.st_mode & S_IROTH) ? "r" : "-");
      printf((s.st_mode & S_IWOTH) ? "w" : "-");
      printf((s.st_mode & S_IXOTH) ? "x" : "-");
      } else
      {
      perror("Erreur dans stat");
      }
      printf(" ");
      printf("%d", &s.st_nlink);
      printf(" ");
      printf("%s", p->pw_name);
      printf(" ");
      printf("%s", grp->gr_name);
      printf(" ");
      printf("%d", &s.st_mtime);
      printf(" ");
      printf("%9jd", (intmax_t)s.st_size);
      printf(" ");
      printf("%s ", d->d_name);
      printf("n");
      }
      closedir(dir);
      }









      share|improve this question














      First thanks for your time then, my problem is i'm trying to implement ls command with a maximum of flags like (ls -laRt...). I understand the stat struct and all the time/ctime/strftime fonctions but when i want to print them on my output they give me a big number, so i found how to convert the timestamp of st_mtime with ctime but i want the result in "Month Day Hour:Minutes" like (ls -lRt)format without using strftime, it is possible or i have to implement this fonction too ? And the second question is, for my number of hard link how i convert the result print on my output something like "-77452048" into the "real" result ?



      This is my main, i'm a begginer so i'm open to all critics thanks U !



      #include <stdio.h>
      #include <stdlib.h>
      #include <dirent.h>
      #include <err.h>
      #include <sys/stat.h>
      #include <string.h>
      #include <time.h>
      #include <pwd.h>
      #include <grp.h>
      #include <stdint.h>

      int main (int argc, char **argv)
      {
      DIR *dir;
      struct dirent *d;
      struct stat s;
      char chemin[256];
      struct passwd *p;
      p = getpwuid(geteuid());
      struct group *grp;
      grp = getgrgid(getgrnam("."));

      if (argc != 2)
      {
      perror("Filenamen");
      exit(-1);
      }

      if ((dir=opendir(argv[1])) == NULL)
      {
      perror("opendir error");
      exit(-1);
      }

      while ((d = readdir(dir)) != 0)
      {
      if(!strcmp (d->d_name, "."))
      {
      continue;
      }
      if(!strcmp (d->d_name, ".."))
      {
      continue;
      }
      strcpy (chemin, argv[1]);
      strcat (chemin, "/");
      strcat (chemin, d->d_name);
      if (!stat(chemin, &s))
      {
      printf((S_ISDIR(s.st_mode)) ? "d" : "-");
      printf((s.st_mode & S_IRUSR) ? "r" : "-");
      printf((s.st_mode & S_IWUSR) ? "w" : "-");
      printf((s.st_mode & S_IXUSR) ? "x" : "-");
      printf((s.st_mode & S_IRGRP) ? "r" : "-");
      printf((s.st_mode & S_IWGRP) ? "w" : "-");
      printf((s.st_mode & S_IXGRP) ? "x" : "-");
      printf((s.st_mode & S_IROTH) ? "r" : "-");
      printf((s.st_mode & S_IWOTH) ? "w" : "-");
      printf((s.st_mode & S_IXOTH) ? "x" : "-");
      } else
      {
      perror("Erreur dans stat");
      }
      printf(" ");
      printf("%d", &s.st_nlink);
      printf(" ");
      printf("%s", p->pw_name);
      printf(" ");
      printf("%s", grp->gr_name);
      printf(" ");
      printf("%d", &s.st_mtime);
      printf(" ");
      printf("%9jd", (intmax_t)s.st_size);
      printf(" ");
      printf("%s ", d->d_name);
      printf("n");
      }
      closedir(dir);
      }






      unix time ls ctime hardlink






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      asked Nov 14 '18 at 23:13









      B. GregoireB. Gregoire

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