/// Call fork() as part of executing a process \p p in a job \j. Execute \p child_action in the
/// context of the child. Returns true if fork succeeded, false if fork failed.
static bool fork_child_for_process(job_t *j, process_t *p, const io_chain_t &io_chain,
bool drain_threads, const char *fork_type,
const std::function<void()> &child_action) {
pid_t pid = execute_fork(drain_threads);
if (pid == 0) {
// This is the child process. Setup redirections, print correct output to
// stdout and stderr, and then exit.
p->pid = getpid();
child_set_group(j, p);
setup_child_process(p, io_chain);
child_action();
DIE("Child process returned control to fork_child lambda!");
}
if (pid < 0) {
debug(1, L"Failed to fork %s!\n", fork_type);
job_mark_process_as_failed(j, p);
return false;
}
// This is the parent process. Store away information on the child, and
// possibly give it control over the terminal.
debug(4, L"Fork #%d, pid %d: %s for '%ls'", g_fork_count, pid, fork_type, p->argv0());
p->pid = pid;
on_process_created(j, p->pid);
set_child_group(j, p->pid);
maybe_assign_terminal(j);
return true;
}
bool SimpleContainer<ChannelType>::tick( void )
{
execute_fork();
if ( wakeups.empty() ) {
return false;
}
Event next_event = wakeups.top();
wakeups.pop();
assert( next_event.time >= the_time );
the_time = next_event.time;
assert( next_event.addr == 0 );
channel.wakeup();
return true;
}
/**
* Main function
*
*/
int main(int argc, char* argv[])
{
int i, j, cmdargv_len;
int rc = 0;
int pipeExists = 0;
char *formattedInput = NULL;
char *userInput = NULL;
char **cmdargv = NULL ;
char *cdCmd = NULL;
char *pipeCmd = NULL;
if((userInput = malloc(sizeof(char)*MAX_CMD_LEN)) == NULL)
ERROR("Failed malloc\n");
cmdargv_len = sizeof(char*) * MAX_CMD_ARGS;
if((cmdargv = (char**) malloc(cmdargv_len)) == NULL) {
ERROR("Failed malloc\n");
} else {
memset(cmdargv, '\0', sizeof(char*) * MAX_CMD_ARGS);
}
registerSignalHandler();
while(1)
{
printf("_dash > ");
got_sigint = false;
if (fgets(userInput, MAX_CMD_LEN, stdin) == NULL) {
if (got_sigint) {
printf("\n");
continue;
} else {
// Ctrl+D
return 0;
}
}
// TODO: Sanitize user input! We're currently hoping the user is a
// benelovent, sweet human being. HA!
if( (formattedInput = malloc(sizeof(userInput))) == NULL )
ERROR("Failed malloc\n");
removeNewLine(userInput, formattedInput);
// See if user wants out.
if((strcmp("quit", formattedInput) == 0) ||
(strcmp("exit", formattedInput) == 0) ||
(strcmp("q", formattedInput) == 0))
{
printf("Quitting!\n");
goto cleanup;
}
// Check to see if user wants to change working directories
if( (cdCmd = strstr(formattedInput, "cd ")) != NULL )
{
if(changeDir(cdCmd) != 0)
ERROR("cd failed.");
free(cdCmd);
// No need to fork/exec, can just move on.
continue;
}
// Check to see if user wants to pipe commands
if( (pipeCmd = strstr(formattedInput, "|")) != NULL )
{
pipeExists = 1;
// Don't need to free pipeCmd bc freeing formattedInput will take
// care of that for us.
//free(pipeCmd);
}
parseUserInput(formattedInput, cmdargv);
for(j=0; cmdargv[j] != NULL; j++)
printf("%d: cmdargv[%d]: %s\n", __LINE__, j, cmdargv[j]);
rc = execute_fork(cmdargv, pipeExists);
ASSERT( rc != 0 );
pipeExists = 0;
}
/* Cleanup! */
cleanup:
free(formattedInput);
free(userInput);
if (cmdargv) {
for (i = 0; i < MAX_CMD_ARGS; i++) {
free(cmdargv[i]); /* free(NULL) is ok with glibc */
}
}
free(cmdargv);
printf("All finished.\n");
return 0;
}