//**************************************************************************************
// function name: main
// Description: main function of smash. get command from user and calls command functions
//**************************************************************************************
int main(int argc, char *argv[])
{
char cmdString[MAX_LINE_SIZE];
LIST_ELEMENT* VarList = NULL;
if(signal(SIGTSTP,signal_handler) == SIG_ERR){
printf("SIGTSTP == SIG_ERR\n");
}
if(signal(SIGINT,signal_handler) == SIG_ERR){
printf("SIGINT == SIG_ERR\n");
}
if(signal(SIGCHLD,signal_handler) == SIG_ERR){
printf("SIGCHLD == SIG_ERR\n");
}
/************************************/
// Init globals
GPid = -1;
Last_Bg_Pid = -1;
Susp_Bg_Pid = -1;
susp = 0;
L_Fg_Cmd =(char*)malloc(sizeof(char)*(MAX_LINE_SIZE+1));
if (L_Fg_Cmd == NULL)
exit (-1);
L_Fg_Cmd[0] = '\0';
while (1)
{
printf("smash > ");
fgets(lineSize, MAX_LINE_SIZE, stdin);
strcpy(cmdString, lineSize);
cmdString[strlen(lineSize)-1]='\0';
// replace $variable with it's value:
if(VarRplc(VarList, lineSize)) continue;
// perform a complicated Command
if(!ExeComp(lineSize, &JobsList)) continue;
// background command
if(!BgCmd(lineSize, &JobsList)) continue;
// built in commands
ExeCmd(&JobsList, &VarList, lineSize, cmdString);
/* initialize for next line read*/
lineSize[0]='\0';
cmdString[0]='\0';
}
return 0;
}
//**************************************************************************************
// function name: main
// Description: main function of smash. get command from user and calls command functions
//**************************************************************************************
int main(int argc, char *argv[])
/*
* argc stands for "argument count" - argc contains the number of arguments passed to the program
* argv stands for "argument vector". A vector is a one-dimensional array,
* and argv is a one-dimensional array of strings
*/
{
char cmdString[MAX_LINE_SIZE];
jobs = new list<job>;
/* Adjusting new handlers for SIGTSTP, SIGINT & SIGCHLD */
struct sigaction sa;
sa.sa_handler = &signal_handle;
sa.sa_flags = SA_RESTART;
sigfillset(&sa.sa_mask);
if (sigaction(SIGTSTP, &sa, NULL) == -1)
perror("Error: cannot handle SIGTSTP");
if (sigaction(SIGINT, &sa, NULL) == -1)
perror("Error: cannot handle SIGINT");
signal (SIGCHLD, &child_handle);
while (1)
{
printf("smash > ");
fgets(lineSize, MAX_LINE_SIZE, stdin);
strcpy(cmdString, lineSize);
cmdString[strlen(lineSize)-1]='\0';
if(!BgCmd(lineSize)) continue; // Checking if CMD is bg CMD, executing if it is (can be a complicated bg CMD) //
if(!ExeComp(lineSize, false)) continue; // Checking if CMD is complicated+not bg CMD, executing if it is //
ExeCmd(lineSize, cmdString); // Executing built-in/external CMD //
lineSize[0]='\0';
cmdString[0]='\0';
}
return 0;
}
//**************************************************************************************
// function name: main
// Description: main function of smash. get command from user and calls command functions
//**************************************************************************************
int main(int argc, char *argv[])
{
char cmdString[MAX_LINE_SIZE];
pJob* job_list_head_ptr;
struct sigaction ctrl_z_act;
struct sigaction ctrl_c_act;
//struct sigaction sigchld_act;
fill_action(&ctrl_z_act, &ctrl_z_handler);
fill_action(&ctrl_c_act, &ctrl_c_handler);
//fill_action(&sigchld_act, &sigchld_handler);
sigaction(SIGTSTP, &ctrl_z_act,NULL);
sigaction(SIGINT, &ctrl_c_act,NULL);
//sigaction(SIGCHLD,&sigchld_act,NULL);
int dead_pid;
//signal declaretions
//NOTE: the signal handlers and the function/s that sets the handler should be found in siganls.c
/* add your code here */
/************************************/
//NOTE: the signal handlers and the function/s that sets the handler should be found in siganls.c
//set your signal handlers here
/* add your code here */
/************************************/
/************************************/
// Init globals
GPid = -1;
Last_Bg_Pid = -1;
Susp_Bg_Pid = -1;
susp = 0;
job_list_head = NULL;
job_list_head_ptr = &job_list_head;
#if 0
L_Fg_Cmd =(char*)malloc(sizeof(char)*(MAX_LINE_SIZE+1));
if (L_Fg_Cmd == NULL)
exit (-1);
L_Fg_Cmd[0] = '\0';
#endif
while (1)
{
printf("smash > ");
while((dead_pid=waitpid(-1,NULL,WNOHANG))>0)// This loop is in charge of handling zombies
{
remove_job(&job_list_head,dead_pid);
}
if((dead_pid==-1) && (errno=EINTR))
{
//refresh_list(job_list_head_ptr);
}
fgets(lineSize, MAX_LINE_SIZE, stdin);
strcpy(cmdString, lineSize);
cmdString[strlen(lineSize)-1]='\0';
// perform a complicated Command
if(!ExeComp(lineSize)) continue;
// background command
if(!BgCmd(lineSize, job_list_head_ptr)) continue;
// built in commands
ExeCmd(&job_list_head, lineSize, cmdString);
/* initialize for next line read*/
lineSize[0]='\0';
cmdString[0]='\0';
fflush(stdout);
fflush(stdin);
}
return 0;
}
