2019-3-15
makefile：
1 myls : myls.o ls_l.o ls_i.o ls_h.o ls_a.o
2 gcc myls.o ls_l.o ls_i.o ls_h.o ls_a.o -o myls
3 clean :
4 rm -rf *.o myls
主函数：
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include "ls_l.h"
#include "ls_i.h"
#include "ls_h.h"
#include "ls_a.h"
int main (int argc, char **argv)
{
int c;
const struct option opt[] = {
{"csss", required_argument, NULL, 'c'},
{0,0,0,0}
};
if(argc < 2)
return -1;
while(1)
{
c = getopt_long(argc, argv, "l:i:h:a:", opt, NULL);
{
if(c == -1)
break;
switch(c)
{
case 'l' :
ls_l(optarg);
break;
case 'i' :
ls_i(optarg);
break;
case 'h' :
ls_a(optarg);
break;
case 'a' :
ls_h(optarg);
break;
case '?' :
printf("无效选项字符\n");
break;
case 1 :
printf("不识别\n");
break;
default :
break;
}
}
}
return 0;
}
LS_L.H: 实现ls -l
#ifndef __LS_L_H
#define __LS_L_H
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <time.h>
#include <dirent.h>
void ls_l(const char *path);
#endif
LS_L.C:
#include "ls_l.h"
#include <errno.h>
#include <string.h>
#define ARRSIZE 1024
void ls_l(const char *path)
{
struct stat buf;
struct passwd *pwd = NULL;
struct group *get = NULL;
struct tm *lo = NULL;
char arr[ARRSIZE] = {};
char *p = NULL;
DIR *op = NULL;
struct dirent *re = NULL;
char brr[ARRSIZE] = {};
if(stat(path, &buf) == -1)
{
perror("stat()");
return ;
}
if(S_ISDIR(buf.st_mode))
{
op = opendir(path);
while(1)
{
re = readdir(op);
if(re == NULL)
{
if(errno)
{
perror("readdir");
closedir(op);
return ;
}
break;
}
memset(brr, '\0', ARRSIZE);
strcpy(brr, path);
strcat(brr, "/");
strcat(brr, re->d_name);
// strcpy(path, brr);
leap: if(stat(brr, &buf) == -1)
{
perror("stat()");
return ;
}
switch(buf.st_mode & S_IFMT)
{
case S_IFSOCK :
putchar('s');
break;
case S_IFLNK :
putchar('l');
break;
case S_IFREG :
putchar('-');
break;
case S_IFBLK :
putchar('b');
break;
case S_IFDIR :
putchar('d');
break;
case S_IFCHR :
putchar('c');
break;
case S_IFIFO :
putchar('p');
break;
default :
break;
}
if(buf.st_mode & S_IRUSR)
putchar('r');
else
putchar('-');
if(buf.st_mode & S_IWUSR)
putchar('w');
else
putchar('-');
if(buf.st_mode & S_IXUSR)
if(buf.st_mode & S_ISUID)
putchar('s');
else
putchar('x');
else
putchar('-');
if(buf.st_mode & S_IRGRP)
putchar('r');
else
putchar('-');
if(buf.st_mode & S_IWGRP)
putchar('w');
else
putchar('-');
if(buf.st_mode & S_IXGRP)
if(buf.st_mode & S_ISGID)
putchar('s');
else
putchar('x');
else
putchar('-');
if(buf.st_mode & S_IROTH)
putchar('r');
else
putchar('-');
if(buf.st_mode & S_IWOTH)
putchar('w');
else
putchar('-');
if(buf.st_mode & S_IXOTH)
if(buf.st_mode & S_ISVTX)
putchar('t');
else
putchar('x');
else
putchar('-');
printf(" %ld ", buf.st_nlink);
pwd = getpwuid(buf.st_uid);
if(pwd == NULL)
{
if(errno)
{
perror("getpwuid()");
return ;
}
}
printf("%s ", pwd->pw_name);
get = getgrgid(buf.st_gid);
if(get == NULL)
{
if(errno)
{
perror("getgrnam()");
return ;
}
}
printf("%s ", get->gr_name);
printf("%ld ", buf.st_size);
lo = localtime(&(buf.st_mtim.tv_sec));
if(lo == NULL)
{
fprintf(stderr, "localtime error");
return ;
}
strftime(arr, ARRSIZE, "%m月 %d %H:%M", lo);
printf("%s ", arr);
p = strrchr(brr, '/');
printf("%s\n", ++p);
}
}
else
goto leap;
}
LS_i.H:实现 ls -i
#ifndef __LS_I_H
#define __LS_I_H
#include "ls_l.h"
#include <glob.h>
#include <string.h>
void ls_i(const char *path);
#endif
LS_i.C:
#include "ls_i.h"
#define BUFSIZE 1024
void ls_i(const char *path)
{
glob_t pglob;
struct stat buf;
char *p = NULL;
char arr[BUFSIZE] = {};
char brr[BUFSIZE] = {};
if(stat(path, &buf) == -1)
{
perror("stat()");
return ;
}
if(S_ISDIR(buf.st_mode))
{
// strcpy(brr, "\"");
strcpy(brr, path);
strcat(brr, "/*");
if(glob(brr, 0, NULL, &pglob) != 0)
{
fprintf(stderr, "glob error\n");
return ;
}
for(int i = 0; i < pglob.gl_pathc; i++)
{
if(stat((pglob.gl_pathv)[i], &buf) == -1)
{
perror("stat()");
return ;
}
printf("%ld ", buf.st_ino);
memset(arr, '\0', BUFSIZE);
strcpy(arr, (pglob.gl_pathv)[i]);
p = strrchr(arr, '/');
printf("%s\n", ++p);
}
}
else
{
printf("%ld ",buf.st_ino);
memset(arr, '\0', BUFSIZE);
strcpy(arr, path);
p = strrchr(arr, '/');
printf("%s\n", ++p);
}
}
LS_H.H : 实现 ls -a
#ifndef __LS_H_H
#define __LS_H_H
#include "ls_i.h"
#include <errno.h>
void ls_h(const char *path);
#endif
LS_H.C:
#include "ls_h.h"
void ls_h(const char *path)
{
DIR *op = NULL;
struct dirent *re = NULL;
op = opendir(path);
if(NULL == op)
{
perror("opendir");
return ;
}
while(1)
{
re = readdir(op);
if(re == NULL)
{
if(errno)
{
perror("readdir");
return ;
}
else
break;
}
printf("%s\n", re->d_name);
}
}
LS_A.H : 实现 ls -h
#ifndef __LS_A_H
#define __LS_A_H
#include "ls_h.h"
#include <sys/types.h>
#include <dirent.h>
void ls_a(const char *path);
#endif
LS_A.C
#include "ls_a.h"
void ls_a(const char *path)
{
DIR *op = NULL;
struct dirent *re = NULL;
char *p = NULL;
op = opendir(path);
if(NULL == op)
{
perror("opendir");
return ;
}
while(1)
{
re = readdir(op);
if(re == NULL)
{
if(errno)
{
perror("readdir");
return ;
}
else
break;
}
p = re->d_name;
if(p[0] == '.')
continue;
printf("%s\n", re->d_name);
}
}
