Linux詳細實現ls l命令

實現ls -l

#include

#include
#include
#include
#include
#include
#include
#include
#include
#include
void
file_type
(unsigned
char type)
//獲取檔案型別
}void
dir_count
(const
char
* pathname)
//獲取目錄中有多少個檔案，空目錄為2
int count =0;
struct dirent* dp =
null
;while
(dp =
readdir
(dir))}
printf
(" %d"
,count);}
void
user_name
(uid_t uid)
//獲取使用者名稱
void
group_name
(gid_t gid)
//獲取組員名
void
last_mtime
(time_t time)
//獲取檔案最後的修改時間
void
file_mode
(const
char
* path,
const
char
* name)
;sprintf
(pathname,
"%s/%s"
,path,name)
;struct stat buf =
;stat
(pathname,
&buf)
;putchar
(buf.st_mode&s_irusr?
'r':
'-')
;putchar
(buf.st_mode&s_iwusr?
'w':
'-')
;putchar
(buf.st_mode&s_ixusr?
'x':
'-')
;putchar
(buf.st_mode&s_irgrp?
'r':
'-')
;putchar
(buf.st_mode&s_iwgrp?
'w':
'-')
;putchar
(buf.st_mode&s_ixgrp?
'x':
'-')
;putchar
(buf.st_mode&s_iroth?
'r':
'-')
;putchar
(buf.st_mode&s_iwoth?
'w':
'-')
;putchar
(buf.st_mode&s_ixoth?
'x':
'-');if
(s_isdir
(buf.st_mode)
)dir_count
(pathname)
;else
printf
(" 1");
user_name
(buf.st_uid)
;group_name
(buf.st_gid)
;printf
(" %4lu"
,buf.st_size)
;last_mtime
(buf.st_mtime);}
void
list_path
(const
char
* path)
struct dirent* dp =
null
;while
(dp =
readdir
(dir))}
}int
main
(int argc,
const
char
* ar**)

s_isreg

(m) 普通檔案 -
s_isdir
(m) 目錄檔案 d
s_ischr
(m) 字元裝置檔案 c 
s_isblk
(m) 塊裝置檔案 b 
s_isfifo
(m) 管道裝置檔案 p
s_islnk
(m) 軟鏈結 l
s_issock
(m) socket檔案 s

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