//Entry point of the P2- microshell implementation
int main(int argc, char *argv[])
{
Pipe p;
ctrlCFlag = 1;
signalHandling();
ushrcProcessing();
char *hostName = (char *)malloc(1000);
gethostname(hostName,1024);
while(1){
fflush(stdin);
if(isatty(fileno(stdin)) && ctrlCFlag == 1){
printf("%s%%", hostName);
fflush(stdout);
}
ctrlCFlag = 1;
p = parse();
if(p == NULL)
{
continue;
}
if(p!=NULL && strcmp(p->head->args[0], "end"))
{
prPipe(p);
}
else if(isatty(fileno(stdin)) && !strcmp(p->head->args[0], "end"))
{
exit(0);
}
else if(!isatty(fileno(stdin)) && !strcmp(p->head->args[0], "end")){
break;
}
freePipe(p);
}
}
int main(int argc, char *argv[])
{
Pipe p;
char host[25];
gethostname(host, 25);
char* home=malloc(100);
int fdin;
backupIO();
home = strdup(getenv("HOME"));
strcat(home, "/.ushrc");
if((fdin=open(home, O_RDONLY))==-1)
perror("OPEN USHRC");
else
{
dup2(fdin, 0);
close(fdin);
printf("%s%% ", host);
fflush(stdout);
p = parse();
currPipe = 0;
prPipe(p);
//freePipe(p);
}
while ( 1 ) {
restoreIO();
flushall();
printf("%s%% ", host);
fflush(stdout);
p = parse();
currPipe = 0;
prPipe(p);
//freePipe(p);
}
}
//ushrc execution handling
void ushrcProcessing()
{
char *rcpath = (char *)malloc(1000);
strcpy(rcpath, getenv("HOME"));
rcpath = strcat(rcpath, "/.ushrc");
if((rcFile = open(rcpath,O_RDONLY)) != -1)
{
oldRCStdIn = dup(fileno(stdin));
if(oldRCStdIn == -1)
{
printf("dup rcfile failed");
return;
}
if(dup2(rcFile,fileno(stdin))==-1)
{
printf("dup rcfile failed");
return;
}
}
else
{
printf("No .ushrc file found or file permission denied\n");
return;
}
Pipe p;
char *host = (char *)malloc(1000);
gethostname(host,1024);
while(1){
fflush(stdin);
if(isatty(fileno(stdin))){
printf("%s%%", host);
}
p = parse();
if(p == NULL)
{
continue;
}
if(p!=NULL && strcmp(p->head->args[0], "end"))
{
prPipe(p);
}
else if(isatty(fileno(stdin)) && !strcmp(p->head->args[0], "end"))
{
exit(0);
}
else if(!isatty(fileno(stdin)) && !strcmp(p->head->args[0], "end")){
break;
}
freePipe(p);
}
dup2(oldRCStdIn,fileno(stdin));
close(rcFile);
close(oldRCStdIn);
}
int main(int argc, char *argv[])
{
Pipe p,q;
size_t len;
char *host_n=malloc(100),*host_p;
int fil;
gethostname(host1,20);
host_n=getenv("HOME");
strcat(host_n,"/.ushrc");
if((fil=open(host_n, O_RDONLY))==-1)
perror("OPEN USHRC");
int oldStdIn=dup(STDIN_FILENO);
dup2(fil,STDIN_FILENO);
close(fil);
lockA=0;
lockB=1;
if(pipe(pipeA)==-1)perror("PIPE:");
if(pipe(pipeB)==-1)perror("PIPE:");
p = parse();
prPipe(p);
freePipe(p);
dup2(oldStdIn,STDIN_FILENO); //restore STDIN
close(oldStdIn); //don't need old STDIN handle
while ( 1 )
{
lockA=0;
lockB=1;
if(pipe(pipeA)==-1)perror("PIPE:");
if(pipe(pipeB)==-1)perror("PIPE:");
printf("%s%% ", host1);
fflush(stdout);
//fflush(stdin);
p = parse();
prPipe(p);
freePipe(p);
}
}
int main(int argc, char *argv[])
{
Pipe p;
char *host = "armadillo";
while ( 1 ) {
printf("%s%% ", host);
p = parse();
prPipe(p);
freePipe(p);
}
}
//Command handler starting point after main
static void prPipe(Pipe p)
{
Cmd c;
if (p == NULL)
return;
headCommand = 1;
for ( c = p->head; c != NULL; c = c->next ) {
checkExitCommands(c);
shellHandler(c);
}
i = 0;
pipeHandle = 0;
prPipe(p->next);
}
static void prPipe(Pipe p)
{
int i = 0;
Cmd c;
if ( p == NULL )
return;
printf("Begin pipe%s\n", p->type == Pout ? "" : " Error");
for ( c = p->head; c != NULL; c = c->next ) {
printf(" Cmd #%d: ", ++i);
prCmd(c);
}
printf("End pipe\n");
prPipe(p->next);
}
static void prPipe(Pipe p)
{
int i = 0;
Cmd c;
if ( p == NULL )
return;
//printf("Begin pipe%s\n", p->type == Pout ? "" : " Error");
for ( c = p->head; c != NULL; c = c->next ) {
//printf(" Cmd #%d: ", ++i);
Execute_cmd(c);
//prCmd(c);
}
// printf("End pipe\n");
lockA=0;
lockB=1;
if(pipe(pipeA)==-1)perror("PIPE:");
if(pipe(pipeB)==-1)perror("PIPE:");
prPipe(p->next);
}
static void prPipe(Pipe p)
{
int i = 0;
Cmd c;
int inPipeId, outPipeId;
currPipe = 0;
outPipeId = 0;
inPipeId = 0;
if ( p == NULL )
return;
//printf("Begin pipe%s\n", p->type == Pout ? "" : " Error");
for ( c = p->head; c != NULL; c = c->next ) {
//printf(" Cmd #%d: ", ++i);
if(c->in == Tpipe || c->in == TpipeErr)
{
inPipeId = currPipe-1;
//printf("Setting In Pipe %d for command %s", inPipeId, c->args[0]);
}
if(c->out == Tpipe || c->out == TpipeErr)
{
outPipeId = currPipe;
pipe(pipes+(2*currPipe));
currPipe++;
//printf("Setting out Pipe %d for command %s", outPipeId, c->args[0]);
}
//fprintf(stdout,"\nInitiating command: %s\n", c->args[0]);
prCmd(c, inPipeId, outPipeId);
//fprintf(stdout,"\nReturning from command: %s\n", c->args[0]);
}
//printf("End pipe\n");
prPipe(p->next);
}