/* 尝试实现ls命令的功能 加选项-l -a -i -h */ #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include "mystat.h" #include "dir_reg.h" #include "readblocks.h" #include "checkdir.h" int inodeprint(char *optarg) { struct stat mystat1; int a; a = stat(optarg, &mystat1); if(a == -1) { perror("stat()"); return 1; } printf("%ld ",mystat1.st_ino); return 0; } int main(int argc, char **argv) { char *optstring = "-l:i:a:h:"; int c; while(1) { c = getopt(argc, argv, optstring); if(c == -1) break; switch(c) { case ‘l‘: long_print(optarg); break; case ‘i‘: inodeprint(optarg); printf("%s\n", optarg); break; case ‘a‘: check_dir(optarg); break; case ‘h‘: blocksprint(optarg); break; case ‘?‘: printf("没有此选项: %s\n", argv[optind-1]); break; case 1: printf(" %s\n", argv[optind-1]); break; default: break; } } return 0; }
#include <stdio.h> #include <string.h> #include <glob.h> #include "mystat.h" #include "dir_reg.h" int long_print(char *optarg) { char *p = NULL; glob_t pglob; int i = 0;
#include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <pwd.h> #include <grp.h> #include <time.h> #include "mystat.h" #define BUFSIZE 1024 int mystat(char *optarg) { struct stat mystat; struct passwd *paswdname = NULL; struct group *gruname = NULL; struct tm *tmp = NULL; char buf[BUFSIZE] = {}; int a; a = stat(optarg, &mystat); if(a == -1) { printf("----------error---------"); perror("stat()"); return 1; } //文件类型 switch(mystat.st_mode & S_IFMT) { case S_IFREG : printf("-"); break; case S_IFDIR : printf("d"); break; case S_IFCHR : printf("c"); break; case S_IFBLK : printf("b"); break; case S_IFSOCK : printf("s"); break; case S_IFLNK : printf("l"); break; case S_IFIFO : printf("p"); break; default : break; } //文件的权限 if(mystat.st_mode & S_IRUSR) putchar(‘r‘); else putchar(‘-‘); if(mystat.st_mode & S_IWUSR) putchar(‘w‘); else putchar(‘-‘); if(mystat.st_mode & S_IXUSR) { if(mystat.st_mode & S_ISUID) putchar(‘s‘); else putchar(‘x‘); } else putchar(‘-‘); if(mystat.st_mode & S_IRGRP) putchar(‘r‘); else putchar(‘-‘); if(mystat.st_mode & S_IWGRP) putchar(‘w‘); else putchar(‘-‘); if(mystat.st_mode & S_IXGRP) { if(mystat.st_mode & S_ISGID) putchar(‘s‘); else putchar(‘x‘); } else putchar(‘-‘); if(mystat.st_mode & S_IROTH) putchar(‘r‘); else putchar(‘-‘); if(mystat.st_mode & S_IWOTH) putchar(‘w‘); else putchar(‘-‘); if(mystat.st_mode & S_IXOTH) { if(mystat.st_mode & S_ISVTX) putchar(‘t‘); else putchar(‘x‘); } else putchar(‘-‘); printf(" %ld ",mystat.st_nlink); paswdname = getpwuid(mystat.st_uid); printf("%s ", paswdname->pw_name); gruname = getgrgid(mystat.st_gid); printf("%s ", gruname->gr_name); printf("%ld ",mystat.st_size); tmp = localtime(&mystat.st_mtime); if(tmp == NULL) return 1; strftime(buf, BUFSIZE, "%m月 %d %H:%M", tmp); printf("%s ", buf); printf("%s ", optarg); putchar(‘\n‘); return 0; }
#include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <glob.h> #include <string.h> #include "readblocks.h" #define BUFSIZE 1024 int is_dian_dir(const char *path) { char *p = NULL; p = strrchr(path, ‘/‘); if(p != NULL) { if(!strcmp(p, "/.") || !strcmp(p, "/..")) return 1; } return 0; } int sum_blocks(const char *path) { int sum = 0; glob_t pglob; struct stat mystat; char buf[BUFSIZE] = {}; if(lstat(path, &mystat) < 0) { perror("lstat()"); return -1; } if(!S_ISDIR(mystat.st_mode)) { return mystat.st_blocks; } //是目录 sum += mystat.st_blocks;//目录本身 strcpy(buf, path); strcat(buf, "/*"); glob(buf, 0, NULL, &pglob); //隐藏文件 memset(buf, ‘\0‘, BUFSIZE); strcpy(buf, path); strcat(buf, "/.*"); glob(buf, GLOB_APPEND, NULL, &pglob); for(int i = 0; i < pglob.gl_pathc; i++) { if(is_dian_dir((pglob.gl_pathv)[i])) continue; sum += sum_blocks((pglob.gl_pathv)[i]); } globfree(&pglob); return sum; } int mydu(const char *path) { int blks; blks = sum_blocks(path); return blks/2; } int blocksprint(char *optarg) { printf("%d K\n", mydu(optarg)); return 0; }
实现结果:
.uplooking@zl-pc:~/桌面/2019-2-20_UEA/高级编程/03day/myls$ ./myls -l . drwxrwxr-x 2 uplooking uplooking 4096 03月 15 17:30 . uplooking@zl-pc:~/桌面/2019-2-20_UEA/高级编程/03day/myls$ ./myls -l "./*" -rw-rw-r-- 1 uplooking uplooking 527 03月 15 13:09 ./checkdir.c -rw-rw-r-- 1 uplooking uplooking 81 03月 15 13:09 ./checkdir.h -rw-rw-r-- 1 uplooking uplooking 2080 03月 15 17:30 ./checkdir.o -rw-rw-r-- 1 uplooking uplooking 375 03月 15 13:41 ./dir_reg.c -rw-rw-r-- 1 uplooking uplooking 82 03月 14 23:29 ./dir_reg.h -rw-rw-r-- 1 uplooking uplooking 1976 03月 15 17:30 ./dir_reg.o -rw-rw-r-- 1 uplooking uplooking 145 03月 15 17:09 ./makefile -rwxrwxr-x 1 uplooking uplooking 14528 03月 15 17:30 ./myls -rw-rw-r-- 1 uplooking uplooking 985 03月 15 17:09 ./myls.c -rw-rw-r-- 1 uplooking uplooking 2904 03月 15 17:30 ./myls.o -rw-rw-r-- 1 uplooking uplooking 2241 03月 15 09:07 ./mystat.c -rw-rw-r-- 1 uplooking uplooking 74 03月 14 23:34 ./mystat.h -rw-rw-r-- 1 uplooking uplooking 4032 03月 15 17:30 ./mystat.o -rw-rw-r-- 1 uplooking uplooking 1202 03月 15 17:08 ./readblocks.c -rw-rw-r-- 1 uplooking uplooking 185 03月 15 17:08 ./readblocks.h -rw-rw-r-- 1 uplooking uplooking 3296 03月 15 17:30 ./readblocks.o -rw-rw-r-- 1 uplooking uplooking 183 03月 15 13:18 ./readme
uplooking@zl-pc:~/桌面/2019-2-20_UEA/高级编程/03day/myls$ ./myls -i . 3277517 .
uplooking@zl-pc:~/桌面/2019-2-20_UEA/高级编程/03day/myls$ ./myls -a . . checkdir.h dir_reg.o mystat.c mystat.o readblocks.h myls readblocks.c myls.c dir_reg.c mystat.h myls.o checkdir.c checkdir.o readme makefile dir_reg.h .. readblocks.o
uplooking@zl-pc:~/桌面/2019-2-20_UEA/高级编程/03day/myls$ ./myls -h . 84 K
原文：https://www.cnblogs.com/Mr-zzzzzz/p/10538582.html