simple shell

Shell Programming and Scripting
1

Hi everyone

I am writing a simple shell but the background '&' not working i dont understand

this is my fork

        pid_t pid;
        pid=fork\(\);


        if\(pid<0\)
            \{
            printf\("\\nChild process failed."\);
            exit\(1\);
            \}
        else if\(pid==0\)
            \{
                if\(execvp\(argv[0],argv\)<0\)
                \{
                    
                printf\("command not found.\\n"\);
                exit\(1\);
                \}
            \}
        
                            
                            
        else if\(background==1\)
            \{    
                pid = waitpid\(pid, NULL, 1\);
                                  if \(pid > 0\)
                                    printf\("working %d\\n", pid\);

            \}

and this is my seaching key '&' code

printf("");
gets(inputBuffer);

            strcpy\(history[j\+\+],inputBuffer\);
            parse\(inputBuffer,argv\);
            if \(strcmp\(argv[0], "exit"\) == 0\)
            exit\(0\);
            
            zzz=strchr\(inputBuffer,'&'\);
            if\(zzz!=NULL\)\{
                    
                    background=1;
                    
                    \}
            else \{
                    background=0;
                    
                    \}

who help me ?

2

i guess your script was not so simple after all :wink: can you post the stdout and stderr

3

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