b30-shell/execute.c at master · b30wulffz/b30-shell · GitHub

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#include "headers.h"
#include "pinfo.h"
#include "globals.h"
#include "definitions.h"
#include "childproc.h"

void execute(char **data, int len, char *trimmedCommand, int isBackground)
{
    if (data != NULL && len > 0)
    {
        int pid = fork();
        if (pid > 0)
        {
            //parent
            setCurrentFgPid(pid);
            if (isBackground != 1)
            {
                signal(SIGTTIN, SIG_IGN);
                signal(SIGTTOU, SIG_IGN);

                tcsetpgrp(STDIN_FILENO, pid);
                // if (tcsetpgrp(STDIN_FILENO, pid) == -1)
                // {
                //     perror("Error, process cannot be made foreground");
                //     return;
                // }

                int status;
                if (waitpid(pid, &status, WUNTRACED) == -1)
                {
                    perror("Error, process cannot finish");
                    // terminalFG();
                    return;
                }
                if (WIFSTOPPED(status) != 0)
                {
                    if (getCurrentFgPid() != -1)
                    {
                        processDetails *node = addProcNode(pid, data[0], trimmedCommand, getChildProcessList());
                        printf("[%d] %d\n", node->jobid, node->pid);
                    }
                }
                tcsetpgrp(STDIN_FILENO, getpgrp());
                // if (tcsetpgrp(STDIN_FILENO, getpgrp()) == -1)
                // {
                //     perror("Error, terminal cannot be made foreground");
                //     return;
                // }
                signal(SIGTTIN, SIG_DFL);
                signal(SIGTTOU, SIG_DFL);
                setCurrentFgPid(-1);
            }
            else
            {
                processDetails *node = addProcNode(pid, data[0], trimmedCommand, getChildProcessList());
                printf("[%d] %d\n", node->jobid, node->pid);
            }
        }
        else if (pid == 0)
        {
            setpgid(0, 0);
            execvp(data[0], data);
            printf("%s: Command not found\n", data[0]);
            exit(0);
        }
        else
        {
            printf("Error: Process can not be created\n");
        }
    }
}