文件權限的子進程

C語言編程問題文件權限的子進程

我試着去一個有一個父進程打印一個子進程，每文件穿過作爲參數，或者如果沒有傳遞參數然後抓住當前每個文件目錄。爲所有文件打印權限。我相信問題是我的struct stat buf的位置; （目前全球）。目前我的輸出打印出文件名和目錄，但沒有權限。任何建議將不勝感激

#include <stdio.h> 
#include <stdlib.h> 
#include <sys/types.h> 
#include <pwd.h> 
#include <sys/stat.h> 
#include <unistd.h> 
#include <string.h> 
#include <dirent.h> 

void permission(); 
typedef int bool; 
#define TRUE 1 
#define FALSE 0 

struct stat buf; 

int main(int argc, char *argv[]) { 
bool commandline = FALSE; //determine if 0 args passed 
if (argc < 2){commandline=TRUE;} 
struct passwd *passwd; 
passwd = getpwuid(getuid()); 
char *file, *dir; 
uid_t uid; //user id 
gid_t gid; //group 
uid = getuid(); 
gid = getgid(); 
DIR *d; 
struct dirent *directory; 
d = opendir("."); 
struct stat buf; 

int i,pid=1; 
for (i = 1; (i < argc && pid) || (commandline==TRUE) ; i++) { 
    if (!(pid = fork())) { 
     if (argc > 1) { 
      dir = passwd->pw_dir; 
      file = malloc(sizeof(dir) + 1 + sizeof(argv[i])); 
      strcat(file, dir); 
      strcat(file, "/"); 
      strcat(file, argv[i]); 
      printf("File: %s\nDirectory: %s\n", argv[i], file); 
      permission(); 
     } else { 
      if (d) { 
       while ((directory = readdir(d)) != NULL) { 
        dir = passwd->pw_dir; 
        printf("File: %s\n",directory->d_name); 
        printf("Directory: %s/%s\n",dir, directory->d_name); 
        permission(); 
       } 
      } 
     } 
    } /* IF CHILD */ 
    commandline=FALSE; 
} /* FOR LOOP */ 
while (wait(NULL) > 0); 

} /* !Main */ 

/* PRINT FILE PERMISSIONS*/ 
void permission() { 
int fileMode; 

fileMode = buf.st_mode; 
if (fileMode & S_IRUSR) { 
    printf("You have Owner permissions:"); 
    if (fileMode & S_IREAD) { printf(" Read "); } 
    if (fileMode & S_IWRITE) { printf("Write "); } 
    if (fileMode & S_IEXEC) { printf("Execute"); } 
    printf("\n\n"); 
} else if (fileMode & S_IRGRP) { 
    printf("You have Group permissions:\n"); 
    if (fileMode & S_IREAD) { printf(" Read "); } 
    if (fileMode & S_IWRITE) { printf("Write "); } 
    if (fileMode & S_IEXEC) { printf("Execute"); } 
    printf("\n\n"); 
} else if (fileMode & S_IROTH) { 
    printf("You have General permissions:"); 
    if (fileMode & S_IREAD) { printf(" Read "); } 
    if (fileMode & S_IWRITE) { printf("Write "); } 
    if (fileMode & S_IEXEC) { printf("Execute"); } 
    printf("\n\n"); 
} 
}

來源

2017-03-11 Ryan Hubbard