Linux applets that display file tree structure information

# Include <stdio. h> # include <sys/types. h> # include <sys/STAT. h> # include <unistd. h> # include <dirent. h> # include <errno. h> # include <stdlib. h> # include <string. h> // maximum directory depth # define max_dir_depth 64 # DEFINE _ Len 4 # define max_file_len 256 # define max_len (64 * _ Len) + max_file_len) # define max_path_len (64*32) void print_dir (const char * file_name, int depth, char * show_c, struct dirent * pdirres) {int I; int Pos = depth * _ Len; show_c [pos-_ Len + 1] = '|'; for (I = 0; I <_ LEN-1; I ++) show_c [pos-I] = '-'; show_c [POS + 1] = '\ 0'; printf ("% S % s \ n", show_c, file_name ); if (! Pdirres) {show_c [pos-_ Len + 1] = '';} for (I = 0; I <_ LEN-1; I ++) show_c [pos-I] = '';} void clear_c (INT depth, char * show_c) {show_c [(depth-1) * _ Len + 1] = '';} int is_last_dir (dir * pdir) {return 0;} int _ tree_dir (const char * dirname, int depth, char * show_c) {dir * pdir; struct stat file_stat; struct dirent diren; struct dirent * pdirres; char * tmpname; If (depth> = max_dir_depth) Return-1; Tmpname = malloc (max_path_len); If (! Tmpname) Return-1;/* Open dir */pdir = opendir (dirname); If (null = pdir) {printf ("% S % s \ n", dirname, strerror (errno); goto err;} do {If (readdir_r (pdir, & diren, & pdirres) {closedir (pdir); printf ("% s \ n ", strerror (errno); goto err;} If (! Pdirres) {clear_c (depth, show_c); break;} If (strcmp (". ", diren. d_name) = 0 | strcmp (".. ", diren. d_name) = 0) continue; snprintf (tmpname, max_path_len, "% S/% s", dirname, diren. d_name); bzero (& file_stat, sizeof (file_stat); If (-1 = Stat (tmpname, & file_stat) {closedir (pdir ); printf ("% s \ n", strerror (errno); goto err;} print_dir (diren. d_name, depth, show_c, pdirres); If (s_isdir (file_stat.st_mode) {// If (is_last_dir (pdir) Clear (depth, show_c); _ tree_dir (tmpname, depth + 1, show_c);} while (null! = Pdirres); closedir (pdir); free (tmpname); Return 0; err: Free (tmpname); Return-1;} int tree_dir (const char * path) {char * show_c; int ret; show_c = malloc (max_len); If (! Show_c) return errno; memset (show_c, '', max_len); ret = _ tree_dir (path, 1, show_c); free (show_c); return ;} # define version "version V1.0: created by dremi" int main (INT argc, char ** argv) {If (argc <2) Return-1; if (strcmp ("-V", argv [1]) = 0) {printf ("% s \ n", version); Return 0 ;} return tree_dir (argv [1]);}

Version 2:

 

int __tree_dir(const char* dirname, int depth, char *show_c){    DIR     *pDir;    struct stat file_stat;    struct dirent diren;    struct dirent *pDirRes;    char  *olddir;    if(depth >= MAX_DIR_DEPTH) return -1;    olddir= malloc(MAX_FILE_LEN);    if(!olddir) return -1;    getcwd(olddir, MAX_FILE_LEN);    if(chdir(dirname)){free(olddir);        printf("%s %s\n", dirname, strerror(errno));        return -1;    }    /* open dir */    pDir = opendir("./");    if(NULL == pDir){free(olddir);        printf("%s %s\n", dirname , strerror(errno));         return -1;    }    do{                       if(readdir_r(pDir, &diren, &pDirRes)){            closedir(pDir);free(olddir);            printf("%s\n", strerror(errno));            return -1;        }        if(!pDirRes) { clear_c(depth, show_c); break; }        if(strcmp(".", diren.d_name) == 0 || strcmp("..", diren.d_name)==0) continue;        bzero(&file_stat, sizeof(file_stat));        if(-1 == stat(diren.d_name, &file_stat)){            closedir(pDir);free(olddir);            printf("%s\n", strerror(errno));            return -1;        }        print_dir(diren.d_name, depth, show_c, pDirRes);        if(S_ISDIR(file_stat.st_mode)){//            if(is_last_dir(pDir)) clear(depth, show_c);            __tree_dir(diren.d_name, depth+1, show_c);        }    }while(NULL != pDirRes);    closedir(pDir);    chdir(olddir);    free(olddir);    return 0;}

The effect is as follows:

 

 |---main_x64 |---main_x86 |---test_asm |   |---a.out |   |---asm.c |   |---get_reg.c |---test_dll |   |---main |   |---mk_dll.sh |   |---test_dll1.c |   |---test_dll1.h |   |---test_dll2.c |   |---test_dll2.h |   |---libtestdll1.so |   |---libtestdll2.so |   |---main.c |---test_log |   |---test_log.c |   |---a.out |---test1.c |---test2.c |---com_prog