/***************myls.c*************************
File?Name:????~/lab4/myls.c
Author:????liujun
Date?Written:????2010/7/20
Date?Last?Modified:????2010/7/20
Purpose:???模擬終端上ls的部分功能
Brief?Description:?模擬終端上ls的部分功能
***********************************************/


#include?
#include
#include
#include?
#include?
#include?
#include?
#include?
#include?

void?print_l（struct?dirent?*dirp?struct?stat?buf）
{
????char?permission[11];
????unsigned?int?mask=0700;
????struct?passwd?*uname;
????struct?group?*gname;
????char?*date;
????int?N_BITS?=?3;
????int?i=3;
????int?j=0;
????static?char*?permess[]={“---““--x““-w-““-wx““r--““r-x““rw-““rwx“};

????if?????（S_ISREG（buf.st_mode））//regular
??????permission[0]=‘-‘;
????else?if（S_ISDIR（buf.st_mode））//directory
??????permission[0]=‘d‘;
????else?if（S_ISCHR（buf.st_mode））//character?special
??????permission[0]=‘c‘;
????else?if（S_ISBLK（buf.st_mode））//block?special
??????permission[0]=‘b‘;
????else?if（S_ISFIFO（buf.st_mode））//fifo
??????permission[0]=‘p‘;
????else?if（S_ISLNK（buf.st_mode））//symbolic?link
??????permission[0]=‘l‘;
????else?if（S_ISLNK（buf.st_mode））//socket
??????permission[0]=‘s‘;
????else????????????????????????//unknown
??????permission[0]=‘*‘;
????while（i>0）
????{
????????permission[1+j*3]=permess[（buf.st_mode?&?mask）>>（i-1）*N_BITS][0];
????????permission[2+j*3]=permess[（buf.st_mode?&?mask）>>（i-1）*N_BITS][1];
????????permission[3+j*3]=permess[（buf.st_mode?&?mask）>>（i-1）*N_BITS][2];
????????i--;
????????j++;
????????mask>>=N_BITS;
?????}
?????permission[10]=‘\0‘;
?????printf（“%s?“permission）;???
?????printf（“%d?“buf.st_nlink）;??
?????uname?=?getpwuid（buf.st_uid）;
?????gname?=?getgrgid（buf.st_gid）;????????????????
?????printf（“%-10s%-10s“uname->pw_namegname->gr_name）;
?????printf（“%-6u“（unsigned?int）buf.st_size）;
?????date?=?（char*）ctime（&buf.st_mtime）;
?????date[24]=‘\0‘;
?????printf（“%-10s??%-10s\n“datedirp->d_name）;?????
}

void?print_i（struct?dirent?*dirp?struct?stat?buf）
{
???//?struct?stat?buf;
???//?stat（dirp->d_name&buf）;
????printf（“%u??%-10s??“（unsigned?int）buf.st_inodirp->d_name）;
}

void?print_li（struct?dirent?*dirp?struct?stat?buf）
{
????char?permission[11];
????unsigned?int?mask=0700;
????struct?passwd?*uname;
????struct?group?*gname;
????char?*date;
????int?N_BITS?=?3;
????int?i=3;
????int?j=0;
????static?char*?permess[]={“---““--x““-w-““-wx““r--““r-x““rw-““rwx“};

????if?????（S_ISREG（buf.st_mode））//regular
??????permission[0]=‘-‘;
????else?if（S_ISDIR（buf.st_mode））//directory
??????permission[0]=‘d‘;
????else?if（S_ISCHR（buf.st_mode））//character?special
??????permission[0]=‘c‘;
????else?if（S_ISBLK（buf.st_mode））//block?special
??????permission[0]=‘b‘;
????else?if（S_ISFIFO（buf.st_mode））//fifo
??????permission[0]=‘p‘;
????else?if（S_ISLNK（buf.st_mode））//symbolic?link
??????permission[0]=‘l‘;
????else?if（S_ISLNK（buf.st_mode））//socket
??????permission[0]=‘s‘;
????else???????????????????????