Linux-ls命令(ls命令模拟)

1、Linux-ls命令模拟/ ls.c/ wxd/ create by jneeyou on 15/11/13/ Copyright (c) 2015 wxd. All rights reserved./#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include "ls_fileHandle.h"/*主函数*/int main(int argc, char *argv)int mask = 0;bool ret = false;freopen(".err.dat

2、","wb",stderr);if (!init()return -1;mask = getCmdLineArgs(argc,argv);if (mask = -2)/-help命令getHelpMenu();/显示帮助else if (mask = ERROR)printf("参数有误，输入"./ls -help"查看帮助n");else/其他命令setMaskArray(mask);ret = getDirInfo(".", 0);if (!ret)printf("参数有误，输入"

3、./ls -help"查看帮助n");freeMem();system("rm -f .err.dat");return 0;/ ls_fileHandle.h/ wxd/ create by jneeyou on 15/11/13/ Copyright (c) 2015 wxd. All rights reserved./#ifndef _LS_FILE_HANDLE_H_#define _LS_FILE_HANDLE_H_/定义bool型#if !defined(bool)#define bool char#define true 1#define

4、false 0#endif#ifndef ERROR#define ERROR -1#endif#if defined(_STDC_VERSION_) && (_STDC_VERSION_>=199901L)/desc 宏函数,输出文件信息#define printf_c(fontBgColor,fontColor,format,args.) printf("033fontBgColor;fontColorm format0330m",args)#else/desc 输出文件信息/ 带颜色输出，可设置字体颜色和字体背景颜色extern int prin

5、tf_c(char fontBgColor, char fontColor, const char *format, .);#endif/desc 获取命令行参数，返回掩码值extern int getCmdLineArgs(int argc, char *argv);/desc 设置掩码数组/ret 成功返回true，否则返回falseextern bool setMaskArray(int maskValue);/desc 获得文件信息/ret 成功返回true，否则返回falseextern bool getFileInfo(const char *dirName, const char

6、 *fileName, unsigned int index);/desc 获得目录信息/ret 成功返回true，否则返回falseextern bool getDirInfo(const char *dirName, int dirLevel);/desc 获得帮助菜单extern void getHelpMenu();/desc 释放内存void freeMem();/desc 初始化bool init();#endif / _LS_FILE_HANDLE_H_/ ls_fileHandle.c/ wxd/ create by jneeyou on 15/11/13/ Copyright

7、 (c) 2015 wxd. All rights reserved./#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/stat.h>#include <stdarg.h>#include <unistd.h>#include <dirent.h>#include <time.h>#include <math.h>#include <pwd.h>#include <grp.h&g

8、t;#include <sys/types.h>#ifndef ERROR#define ERROR -1#endif#define OK 0#define NUL_POINTER NULL/定义bool,true,false#ifndef bool#define bool char#define true 1#define false 0#endif/帮助文件名#define HELP_FILE"helpInfo.dat"#define TMP_FILE".tmp"/定义 errno_t 型#define errno_t int/定义文件类

9、型#define block_file'b'#define direct_file'd'#define spec_char_file 'c'#define fifo_device 'p'#define regular_file'-'#define link_file 'l'#define socket_file 's'#define BF block_file/块文件#define DF direct_file/目录文件#define CF spec_char_file/特殊字符文件

10、#define FD fifo_device/FIFO设备#define RF regular_file/普通文件#define LF link_file/符号链接文件#define SF socket_file/scoket文件/文件名最大长度#define MAX_FILE_NAME512/最多子目录个数#define MAX_SUB_DIR100/背景色typedef struct BG_COLORconst char BLACK;/黑const char DARKRED;/深红const char GREEN;/绿const char YELLOW;/黄const char BLUE;

11、/蓝const char PURPLE;/紫const char DARKGREEN;/深绿const char WHITE;/白const char DEFAULT;/默认 bgColor;/文字背景色static const bgColor font_bgColor = 40, 41, 42, 43, 44, 45, 46, 47, 0 ;/前景色typedef struct FG_COLOR const char BLACK;/黑const char RED;/红const char GREEN ;/绿const char YELLOW ;/黄const char BLUE;/蓝cons

12、t char PURPLE;/紫const char DARKGREEN;/深绿const char WHITE;/白const char DEFAULT;/默认 fgColor;/文字颜色static const fgColor font_fgColor = 30, 31, 32, 33, 34, 35, 36, 37, 0 ;/文件信息结构体typedef struct File_Infoino_t ino;/节点号char type;/类型char perm10;/权限nlink_t nlink;/硬链接数char uname32;/用户名char gname32;/所属组名off_t

13、size;/大小time_t mtime;/最后修改时间char name32;/文件名char lname32; /链接的文件名char nameColor;/名字颜色char lnameColor;/链接文件颜色 fileInfo;#define MAX_FILE_NUM 100/文件信息结构体数组static fileInfo *m_fileInfo = NULL;/已分配空间static unsigned int ALLOC_MEM_LEN = 0;/全局变量/掩码数组，根据每位元素值是否为1选择获取文件哪些/信息,每位元素对应一个ls命令参数,对应关系如下：/ maskArray0-

14、> -l/ maskArray1-> -a/ maskArray2-> -R/ maskArray3-> -r/ maskArray4-> -d/ maskArray5-> -i/ maskArray6-> -S(大写S)/ maskArray7-> -t/ maskArray8-> -m/ maskArray9-> -1(数字1）/ maskArray10-> -help/ maskArray11->无参数/ maskArray12.15-> 保留static unsigned char maskArray16 =

15、 0;/掩码数组有效长度#define VALID_LEN_ARRAY10/保存外部输入的文件名static char fileName12820 = "" ;/外部文件数目static int extFileNums = 0;/- 函数实现-/检查参数errno_t checkArgement(char arg)static const char allArgs = 'l','a','R','r','d','i','S','t','m&#

16、39;,'1'int len = strlen(allArgs);int i = 0;for (i = 0; i < len; i+)if (arg = allArgsi) return i;return ERROR;/安全拷贝errno_t strcpy_s(char * _Dst, size_t _SizeInBytes, const char * _Src)char *ret = NULL;if (strlen(_Src) > _SizeInBytes)return ERROR;ret= strcpy(_Dst, _Src);if (ret = NULL) r

17、eturn ERROR;return OK;/安全打开errno_t fopen_s(FILE * _File, const char * _Filename, const char * _Mode)*_File = fopen(_Filename, _Mode);if (*_File = NULL) return ERROR;return OK;/安全输出errno_t vsprintf_s(char * _DstBuf, size_t _SizeInBytes, const char * _Format,va_list _ArgList)errno_t ret = vsnprintf(_D

18、stBuf, _SizeInBytes, _Format, _ArgList);return ret;/获取命令行参数，返回掩码值int getCmdLineArgs(int argc, char *argv)int maskValue = 0x0000;int fileCount = 0;int i = 0;for (i = 1; i < argc; i+)if (!strcmp(argvi, "-help")return -2; else if (argvi0 = '-')int len = strlen(argvi);int ret = ERRO

19、R;while (-len)ret = checkArgement(argvilen);if (ret = ERROR) return ERROR;maskValue |= (0x0001 << ret);elsestrcpy_s(fileNamefileCount+, sizeof(fileName0), argvi);extFileNums = fileCount;return maskValue;/设置掩码数组bool setMaskArray(int maskValue)long tmp = 0x10000;int i = 15;memset(maskArray,0,siz

20、eof(maskArray);if (maskValue = 0)maskArray11 = 1;return true;while ( !(tmp >>= 1) & maskValue) && tmp > 0) i-;while (tmp > 0)if (tmp & maskValue)maskArrayi- = 1;elsemaskArrayi- = 0;tmp >>= 1;return true;#if !(defined(_STDC_VERSION_)&& _STDC_VERSION_>=1999

21、01L)/desc 宏函数,带颜色输出，#format，将format对应的参数字符串化（为变量名时，不是变量中的值，而是变量名）#define PRINT_BY_COLOR(fontBgColor,Bold,fontColor,format,argsValue) printf("033%d;%02d;%dm"#format"0330m",fontBgColor,Bold,fontColor,argsValue) /输出文件信息int printf_c(char fontBgColor, char fontColor, const char *forma

22、t, .)static char printf_buf1024;va_list args;int n = 0;int bold = 0;va_start(args, format);n = vsprintf_s(printf_buf, sizeof(printf_buf), format, args);va_end(args);if ( fontBgColor < 40 | fontBgColor > 47 )fontBgColor = font_bgColor.DEFAULT;if ( fontColor < 30 | fontColor > 37 )fontBgCo

23、lor = font_fgColor.DEFAULT;if (fontColor = font_fgColor.BLACK)bold = 0;PRINT_BY_COLOR(fontBgColor, bold, fontColor, "%s", printf_buf);return n;#endif/通过uid获得用户名char * getUnameByUid(uid_t uid)struct passwd *m_pw;static char name20 = ""m_pw = getpwuid(uid);if (m_pw = NULL)return NU

24、L_POINTER;strcpy_s(name, sizeof(name), m_pw->pw_name);return name;/通过gid获得组名char * getGnameByGid(gid_t gid)struct group *m_gr;static char name20 = ""m_gr = getgrgid(gid);if (m_gr = NULL)return NUL_POINTER;strcpy_s(name, sizeof(name), m_gr->gr_name);return name;/ 获取符号链接链接的文件名bool getF

25、ileNameBySLink(char *sLinkName,char *buf, size_t bufSize)int len = 0;len = readlink(sLinkName, buf, bufSize);buflen = '0'if (len > bufSize)perror("文件名过长,已被截取.");return true;/获取文件访问权限char * getFileAccePermis(mode_t st_mode)static char perm9 = ""char permValue4 = "x

26、wr-"int i = 0, len = 9;for (i = 0; i < len; i+)if ( st_mode & (0x1 << i)permlen - i - 1 = permValuei % 3;elsepermlen - i - 1 = permValue3;return perm;/获取文件类型char getFileType(mode_t st_mode)switch (st_mode & S_IFMT) case S_IFBLK: return BF;case S_IFDIR: return DF;case S_IFCHR: r

27、eturn CF;case S_IFIFO: return FD;case S_IFREG: return RF;case S_IFLNK: return LF;case S_IFSOCK: return SF; default: return ERROR;/通过文件类型获得文件名颜色char getFileColorByType(const char *fileName,char type)char cmd3512;char ret = font_fgColor.BLACK;if (type = DF) return font_fgColor.BLUE;if (type = LF) retu

28、rn font_fgColor.DARKGREEN;if (access(fileName, X_OK) = 0) return font_fgColor.GREEN;/测试是否为压缩文件if (!system("mkdir tmp")sprintf(cmd0, "tar -xf %s -C tmp", fileName);sprintf(cmd1, "tar -xzf %s -C tmp", fileName);sprintf(cmd2, "tar -xjf %s -C tmp", fileName);if (!

29、system(cmd0) | !system(cmd1) | !system(cmd2)ret = font_fgColor.RED;system("rm -Rf tmp"); return ret;/获得文件信息bool getFileInfo(const char *dirName, const char *fileName, unsigned int index)struct stat fileStat;char name50;sprintf(name,"%s/%s",dirName,fileName);/数组已装满if (index >=

30、ALLOC_MEM_LEN)m_fileInfo = (fileInfo*)realloc(m_fileInfo, sizeof(fileInfo) * ALLOC_MEM_LEN * 2);ALLOC_MEM_LEN *= 2;/获取文件信息int ret = lstat(name, &fileStat);if (ret = -1)return false;/节点号m_fileInfoindex.ino = fileStat.st_ino;/文件类型m_fileInfoindex.type = getFileType(fileStat.st_mode);/文件权限strcpy_s(m

31、_fileInfoindex.perm, sizeof(m_fileInfoindex.perm), getFileAccePermis(fileStat.st_mode); /硬链接数m_fileInfoindex.nlink = fileStat.st_nlink;/用户名strcpy_s(m_fileInfoindex.uname, sizeof(m_fileInfoindex.uname), getUnameByUid(fileStat.st_uid);/组名strcpy_s(m_fileInfoindex.gname, sizeof(m_fileInfoindex.gname), g

32、etGnameByGid(fileStat.st_gid);/文件大小m_fileInfoindex.size = fileStat.st_size;/上次修改时间m_fileInfoindex.mtime = fileStat.st_mtime;return true;/自定义排序函数int cmp(const void *a, const void *b)char tmpA,tmpB;fileInfo *fileInfoA = (fileInfo *)a;fileInfo *fileInfoB = (fileInfo *)b;if (maskArray7 = 1)return fileIn

33、foA->mtime - fileInfoB->mtime;else if(maskArray6 = 1)return fileInfoA->size - fileInfoB->size;tmpA = fileInfoA->name0;if (tmpA >= 'A' && tmpA <= 'Z')tmpA += 'a' - 'A'tmpB = fileInfoB->name0;if (tmpB >= 'A' && tmpB <

34、;= 'Z')tmpB += 'a' - 'A'if (maskArray3 = 1)return tmpB - tmpA;elsereturn tmpA - tmpB;/文件排序void sortFiles(fileInfo *pFileInfoArray, int elemNum)qsort(pFileInfoArray, elemNum, sizeof(pFileInfoArray0), cmp);/移动输出位置void moveOutPos(int row,int col)char hori ='A'/向上char ver

35、t = 'C'/向右if (row < 0)/向下hori = 'B'row = -row;if (col < 0)/向左vert = 'D'col = -col;printf("033%d%c033%d%c",row, hori, col, vert);/ 通过掩码数组输出文件/ 返回输出内容长度int outFileByMaskArray(fileInfo cur_fileInfo, unsigned char maskArray)int outputFlag = 0;/是否输出标志char outStr102

36、4 = ""/输出字符串int i = 0;int len = 0;/不带参数情况if (maskArray11 = 1)printf_c(font_bgColor.DEFAULT, cur_fileIColor, "%s", cur_fileI);return strlen(cur_fileI);/-l命令,长格式输出if (maskArray0)struct tm *mTime = localtime(&cur_fileInfo.mtime);char str20 = ""s

37、printf(str,"%4d.%02d.%02d %02d:%02d:%02d",mTime->tm_year + 1900,mTime->tm_mon + 1,mTime->tm_mday,mTime->tm_hour,mTime->tm_min,mTime->tm_sec);sprintf(outStr, "%c%s. %d %s %s %-8d %s", cur_fileInfo.type, cur_fileInfo.perm, cur_fileInfo.nlink,cur_fileInfo.uname, cu

38、r_fileInfo.gname, cur_fileInfo.size, str);/-i命令，输出节点号inoif (maskArray5)char tmp512 = ""strcpy_s(tmp, sizeof(tmp),outStr);sprintf(outStr, "%d %s", cur_fileInfo.ino, tmp);len = strlen(outStr);printf("%s", outStr);/输出文件信息if (maskArray0)printf(" ");len += 2;len +=

39、 strlen(cur_fileI);printf_c(font_bgColor.DEFAULT, cur_fileIColor,"%s", cur_fileI);/-l格式下的输出链接文件指向的文件if (maskArray0 && cur_fileInfo.type = LF)printf(" -> ");printf_c(font_bgColor.DEFAULT, cur_fileInfo.lnameColor,"%s", cur_fileInfo.lname

40、);len += strlen(cur_fileInfo.lname) + 4;return len;/获得目录信息bool getDirInfo(const char *dirName, int dirLevel)DIR *curDir = opendir(dirName);char linkedFileMAX_FILE_NAME = ""char subDirFileMAX_SUB_DIRMAX_FILE_NAME;/保存目录文件int cnt_subDir = 0;/子目录数int cnt_dirFiles = 0;/目录下文件数int i = 0, ret = 0;

41、static firCallFlag = 1;/第一次调用标记int total_size = 0;char tmpMAX_FILE_NAME = ""struct stat m_stat;if (curDir = NULL)return false;/-R命令时首先输出目录名if ( maskArray2 )for (i = 0; i < dirLevel; i+) printf("t");printf("%s:n",dirName);struct dirent *m_dirent = NULL;while (m_dirent

42、 = readdir(curDir) != NULL)if (!strcmp(".err.dat", m_dirent->d_name)continue;if (!strcmp(dirName,".") && extFileNums > 0)for ( i = 0; i < extFileNums; i+)if (!strcmp(fileNamei, m_dirent->d_name)break;firCallFlag = 0;if ( i = extFileNums) continue;/非-a命令时跳过隐藏文件

43、if (m_dirent->d_name0 = '.' && maskArray1 != 1)continue;ret = getFileInfo(dirName, m_dirent->d_name, cnt_dirFiles);if (!ret | !strcmp(m_dirent->d_name,"") break;/-d命令跳过非目录文件if (maskArray4 = 1 && m_fileInfocnt_dirFiles.type != DF)continue ;sprintf(tmp, "

44、;%s/%s",dirName,m_dirent->d_name);strcpy_s(m_fileInfocnt_dirF, sizeof(m_fileInfocnt_dirF), m_dirent->d_name);m_fileInfocnt_dirFColor = getFileColorByType(tmp, m_fileInfocnt_dirFiles.type);/获得链接的目标文件名if (m_fileInfocnt_dirFiles.type = LF)getFileNameBySLink(tmp, li

45、nkedFile, sizeof(linkedFile);strcpy_s(m_fileInfocnt_dirFiles.lname, sizeof(m_fileInfocnt_dirFiles.lname), linkedFile);lstat(linkedFile, &m_stat);sprintf(tmp, "%s/%s",dirName,linkedFile);m_fileInfocnt_dirFiles.lnameColor = getFileColorByType(tmp,getFileType(m_stat.st_mode);/-R命令时保存子目录if

46、 (maskArray2 && m_fileInfocnt_dirFiles.type = DF)strcpy_s(subDirFilecnt_subDir, sizeof(subDirFilecnt_subDir), m_fileInfocnt_dirF); cnt_subDir+;total_size += m_fileInfocnt_dirFiles.size;cnt_dirFiles+;firCallFlag = 1;if (firCallFlag = 0)return false;/排序输出文件sortFiles(m_fileInfo, cnt_di

47、rFiles);/输出文件int col = 4, row ;int max_lenRowOfCol = 0;/当前列最长行长度int total_lenRow = 0;/当前行总长度int len = 0, firColFlag = 0;int j = 0;row = cnt_dirFiles / col;row = (cnt_dirFiles * 1.0 / col > row) ? row + 1 : row;if (maskArray0 = 1)if ( maskArray2 )for (j = 0; j < dirLevel; j+) printf("t");printf("file number:%d total size:%dn",cnt_dirFiles, total_size);for (i = 1; i <= cnt_dirFiles; i+)if (maskArray2 && (i <= row | maskArray0 | maskArray9)for (j = 0; j < dirL