分叉代碼編譯但在執行過程中出現錯誤

Question

代碼編譯但不運行，並在第7行和第10行給出錯誤。我無法更正錯誤，請幫助我。 以下是在外殼的錯誤序列：

./mylab3.c: line 7: char: command not found 
./mylab3.c: line 10: syntax error near unexpected token `(' 
./mylab3.c: line 10: `int main() 

代碼：

#include <stdio.h> 
#include <stdlib.h> 
#include <unistd.h> 
#include <sys/wait.h> 


char *env_init[]= { "USER=unknown", "PATH=/tmp",NULL}; 


int main() 
{ 
    pid_t pid; 
    int flag, status; 
// Create child process #1 
    pid = fork(); 
    if (pid < 0) 
    { 
     perror("fork error"); 
    } 
    else if (pid == 0) 
    { 
// Child process – replace with different program 
     flag = execle("/bin/Is", "Is", "-IF",NULL,env_init); 
     if (flag < 0) 
     { 
      perror("execle error"); 
     } 
    } 
    else 
    { 

     if (wait(&status) != pid) 
     { 
      perror("wait error"); 
     } 
    } 
//Create child process #2 
    pid = fork(); 
    if (pid < 0) 
    { 
     perror ("fork error"); 
    } 
    else if (pid == 0) 
    { 

     flag = execlp("./lab03script","lab03.script","file1", "file2", NULL); 
     if (flag < 0) 
     { 
      perror("execlp error"); 
     } 

    } 
    else 
    { 

     if (wait(&status) != pid) 
     { 
      perror("wait error") ; 
     } 
    } 
    exit (0); 
} 

Answer 1

變化

char *env_init[]= { "USER=unknown", "PATH=/tmp",NULL}; 

到

const char *env_init[]= { "USER=unknown", "PATH=/tmp",NULL}; 

將字符串轉換爲char *已棄用。