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permissions.c
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permissions.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* permissions.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: kblack <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/02/13 23:36:08 by kblack #+# #+# */
/* Updated: 2019/02/26 20:56:34 by kblack ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_ls.h"
/*
** this creates a string of the file type and permissions for each file/directory
** in the directory stream and returns the string
*/
void get_file_type(struct stat file, char *str)
{
int i;
int x;
i = 0;
x = file.st_mode & S_IFMT;
S_ISREG(x) ? str[i] = '-' : 0;
S_ISBLK(x) ? str[i] = 'b' : 0;
S_ISCHR(x) ? str[i] = 'c' : 0;
S_ISDIR(x) ? str[i] = 'd' : 0;
S_ISLNK(x) ? str[i] = 'l' : 0;
S_ISFIFO(x) ? str[i] = 'p' : 0;
S_ISSOCK(x) ? str[i] = 's' : 0;
}
/*
** sticky bit handling: aka "restriction deletion bit": when enables it makes a
** directory such that users can only rename of delete files/directories
** within it that they are owners of. Commonly found in world-writeable directories like /tmp
*/
char *get_permissions(struct stat file)
{
char *str;
int i;
i = 10;
str = ft_strnew(i);
get_file_type(file, str);
i = 1;
str[i++] = S_IRUSR & file.st_mode ? 'r' : '-';
str[i++] = S_IWUSR & file.st_mode ? 'w' : '-';
str[i++] = S_IXUSR & file.st_mode ? 'x' : '-';
str[i++] = S_IRGRP & file.st_mode ? 'r' : '-';
str[i++] = S_IWGRP & file.st_mode ? 'w' : '-';
str[i++] = S_IXGRP & file.st_mode ? 'x' : '-';
str[i++] = S_IROTH & file.st_mode ? 'r' : '-';
str[i++] = S_IWOTH & file.st_mode ? 'w' : '-';
if (S_ISVTX & file.st_mode || S_IXOTH & file.st_mode)
str[i++] = S_ISVTX & file.st_mode ? 't' : 'x';
else
str[i++] = '-';
str[i] = '\0';
return (str);
}