实现linux mkdir、rmdir和rm命令
linuxcommand: 实现一些linux command (gitee.com)
1.实现mkdir命令，对于程序的说明，请看注释（只有少量）
/**
* @copyright Copyright (c) 2022 Jiawshi
* @author Jiawshi ([email protected])
*
* @file mkdirr.c
* @brief
*
* @version V0.01
* @date 2022-11-26
*
* @note 历史记录 ：
* - [2022-11-26] [Jiawshi] 创建初始版本：
* @warning
* @par 修改记录：
*
* date Version Author Description 2022-11-26 V0.01 Jiawshi 创建初始版本
*/
#include
#include "mkdirn.h"
#include
#include
#include
#include
#include
#include
/**
* @fn
* @brief
*
* @param [in] argc
* @param [in] argv
*
* @return int
*/
int main(int argc, char **argv)
{
int ch,pflag=0,vflag=0,i,err;
char *modeStat = NULL;
mode_t mode;
while((ch=getopt(argc,argv,"m:pvh")) != -1)
{
switch(ch)
{
case 'm':
modeStat = optarg;
break;
case 'p':
pflag = 1;
break;
case 'v':
vflag = 1;
break;
case 'h':
print_help();
exit(1);
default:
usage();
break;
}
}
argc -=optind;
argv +=optind;
if(modeStat == NULL)
{
mode = S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH;
}
for(i=0;i /**
* @copyright Copyright (c) 2022 Jiawshi
* @author Jiawshi ([email protected])
*
* @file mkdirn.h
* @brief
*
* @version V0.01
* @date 2022-11-26
*
* @note 历史记录 ：
* - [2022-11-26] [Jiawshi] 创建初始版本：
* @warning
* @par 修改记录：
*
* date Version Author Description 2022-11-26 V0.01 Jiawshi 创建初始版本
*/
#ifndef MKDIRL_H__
#define MKDIRN_H__
#include
#include
void printf_err(int);
void usage(void);
void print_help(void);
void flag(int ,char *);
int mkDir(char *,mode_t);
int createDir(char *,mode_t);
#endif
/**
* @copyright Copyright (c) 2022 Jiawshi
* @author Jiawshi ([email protected])
*
* @file mkdirn.c
* @brief
*
* @version V0.01
* @date 2022-11-26
*
* @note 历史记录 ：
* - [2022-11-26] [Jiawshi] 创建初始版本：
* @warning
* @par 修改记录：
*
* date Version Author Description 2022-11-26 V0.01 Jiawshi 创建初始版本
*/
#include
#include
#include
#include
#include
#include
#include
#include "mkdirn.h"
/**
* @fn
* @brief print err if create file failure
*
* @param [in] err err = errno
*
*/
void printf_err(int err)
{
if(err == EEXIST)
fprintf(stderr,"%s\n",strerror(err));
else
{
fprintf(stderr,"create err! use help\n");
}
}
/**
* @fn
* @brief
*
* @param [in] vflag -v option symbol
* @param [in] dir dirname
*
*/
void flag(int vflag,char *dir)
{
if(vflag)
{
printf("mkdir: created directory '%s'\n",dir);
}
}
void usage(void)
{
fprintf(stderr,"usage....,you can use mkdir -h to print help.\n");
}
void print_help(void)
{
printf("-m set file mode,it need a mode after -m \
-p make parnet directories \
-v print a message for each directory that be created\
-h print help\n");
}
/**
* @fn
* @brief
*
* @param [in] path dirname which need be create
* @param [in] mode permission for the dirname
*
* @return int
*/
int mkDir(char *path,mode_t mode)
{
if((mkdir(path,mode)) < 0)
{
if((mkdir(path,mode)) < 0)
{
if(errno == EEXIST)
return EEXIST;
else
{
return -1;
}
}
}
return 0;
}
int createDir(char *path,mode_t mode)
{
int first,end,err;
char *dirPath = path;
if(*dirPath == '/')
{
dirPath++;
}
for(first=0,end=0;first <= strlen(path);first++)
{
if(dirPath[first] == '\0')
{
end = 1;
}
else if(dirPath[first] != '/')
{
continue;
}
dirPath[first] = '\0';
err = mkDir(path,mode);
if(err != 0)
{
if(err == EEXIST)
{
if(end)
{
return EEXIST;
}
}
else
return -1;
}
if(!end)
{
dirPath[first] = '/';
}
if(end)
break;
}
return 0;
} makefile文件
all:main
main:mkdirn.o mkdirr.o
gcc $^ -o $@2.rmdir的实现，对于程序的说明，请看注释（只有少量）
/**
* @copyright Copyright (c) 2022 Jiawshi
* @author Jiawshi ([email protected])
*
* @file rmd.c
* @brief 主程序
*
* @version V0.01
* @date 2022-11-26
*
* @note 历史记录 ：
* - [2022-11-26] [Jiawshi] 创建初始版本：
* @warning
* @par 修改记录：
*
* date Version Author Description 2022-11-26 V0.01 Jiawshi 创建初始版本
*/
#include
#include
#include
#include
#include "rmdi.h"
#include
int main(int argc, char **argv)
{
int ch,i,err;
int pflag = 0;
int ignore = 0;
int help = 0;
int longindex;
printf_usage(argc);
struct option longopts[] = {{"ignore",0,0,'i'},{"parents",0,0,'p'},
{"verbose",0,0,'v'}, {"help",0,0,'h'},
{0,0,0,0}};
longindex = 4;
while((ch = getopt_long(argc, argv,"pv",longopts,&longindex)) != -1)
{
switch(ch)
{
case 'p':
pflag = 1;
break;
case 'v':
v_flag = 1;
break;
case 'h':
printf_help();;
break;
case 'i':
ignore = 1;
break;
default :
printf("Try 'rmdir --help' for more information\n");
exit(1);
}
}
argc -= optind;
argv += optind;
for(i=0;i /**
* @copyright Copyright (c) 2022 Jiawshi
* @author Jiawshi ([email protected])
*
* @file rmdi.c
* @brief 实现函数的功能
*
* @version V0.01
* @date 2022-11-26
*
* @note 历史记录 ：
* - [2022-11-26] [Jiawshi] 创建初始版本：
* @warning
* @par 修改记录：
*
* date Version Author Description 2022-11-26 V0.01 Jiawshi 创建初始版本
*/
#include
#include
#include "rmdi.h"
#include
#include
#include
#include
#include
static int _flag = 0;
int v_flag = 0;
static int strlong;
void printf_err(int err)
{
fprintf(stderr,"%s\n",strerror(err));
}
void printf_usage(int num)
{
if(num < 2 )
{
fprintf(stderr,"rmdir:missing operand\nTry 'rmdir --help' \
for more information\n");
}
}
/**
* @fn vFlag
* @brief 处理 -v --verbose
*
* @param [in] flag vflag
* @param [in] path dirname
*
*/
void vFlag(int flag,char *path)
{
if(flag)
{
printf("rmdir: removing directory,'%s'\n",path);
}
}
void printf_help(void)
{
printf("--ignore :ignore when error happen \
-p --parents :remove include partent dir \
-v --verbose :view result \
--help:print help\n");
}
/**
* @fn rmParent
* @brief deal with -p --parent parameter
*
* @param [in] dirName
*
* @return int success yes(return 0) or no(errno)
*/
int rmParent(char *dirName)
{
char *temPath = dirName;
int retVal;
int i;
DIR *dirp;
struct dirent *dirn;
strlong = strlen(temPath);
if(temPath[strlong-1] == '/')
{
_flag = 1;
temPath[strlong-1] = '\0';
}
while(temPath != NULL)
{
// if(strcmp(temPath,".") == 0)
// {
// temPath = NULL;
// return 0;
// }
if(strcmp(temPath,"./") ==0 || strcmp(temPath,"..") ==0||strcmp(temPath,".")==0)
{ temPath = NULL;
return 0;
}
retVal = rmDir(temPath);
if(retVal < 0)
{
//do something
return errno;
}
strlong = strlen(temPath);
for(i = strlong -1;i>=0;i--)
{
if(temPath[i] == '/'&& i != 0)
{
//printf("hhh\n");
temPath[i] = '\0';
break;
}
if(i == 0)
{
temPath = NULL;
}
}
}
return 0;
}
/**
* @fn rmDir
* @brief remove dirname
*
* @param [in] dirName
*
* @return int success yes(return 0) or no(errno)
*/
int rmDir(char *dirName)
{
char *temPath = dirName;
int reVal;
reVal = rmdir(temPath);
if(reVal==0)
{
if(_flag)
{
temPath[strlong-1] = '/';
}
vFlag(v_flag,temPath);
if(_flag)
{ _flag = 0;
temPath[strlong-1] = '\0';
}
}
return reVal;
} /**
* @copyright Copyright (c) 2022 Jiawshi
* @author Jiawshi ([email protected])
*
* @file rmdi.h
* @brief
*
* @version V0.01
* @date 2022-11-26
*
* @note 历史记录 ：
* - [2022-11-26] [Jiawshi] 创建初始版本：
* @warning
* @par 修改记录：
*
* date Version Author Description 2022-11-26 V0.01 Jiawshi 创建初始版本
*/
#ifndef RMDI_H__
#define RMDI_H__
extern int v_flag;
void printf_err(int);
void printf_usage(int);
void printf_help(void);
void vFlag(int,char *);
int rmParent(char *);
int rmDir(char *);
#endif
makefile
all:main
main:rmd.o rmdi.o
gcc $^ -o $@
.PHONY:clean
clean:
rm -rf *.o main
rm命令在一开始的仓库链接里面。
对于这两个命令如何在你的电脑上运行。你需要花点时间自己看一下。如果你遇到了bug，请与我联系[email protected] 或者给我留言。