/*! \brief
* Prepend own uri to Path header
*/
int add_path(struct sip_msg* _msg, char* _a, char* _b)
{
str user = {0,0};
int ret;
path_param_t param = PATH_PARAM_NONE;
struct via_body *via;
if (path_obb.use_outbound != NULL
&& path_obb.use_outbound(_msg)) {
if (path_obb.encode_flow_token(&user, _msg->rcv) != 0) {
LM_ERR("encoding outbound flow-token\n");
return -1;
}
/* Only include ;ob parameter if this is the first-hop (that
means only one Via:) */
if (parse_via_header(_msg, 2, &via) < 0)
param = PATH_PARAM_OB;
}
ret = prepend_path(_msg, &user, param);
if (user.s != NULL)
pkg_free(user.s);
return ret;
}
/*
* Runs commands in sequential mode.
*/
char sequential_mode(char **pointers_to_commands, Node *head) {
char mode = 's';
pid_t cpid, w;
char **command;
char return_char = 's';
int i = 0;
while (pointers_to_commands[i] != NULL) {
command = tokenify(pointers_to_commands[i], " \n\t");
if (command[0] == NULL) {
i++;
free_tokens(command);
continue;
}
if (handle_exit(command) != 'n') {
free_tokens(command);
return 'e';
}
if (return_char != 'e' && is_mode(command)) {
return_char = handle_mode(command, mode, return_char);
i++;
free_tokens(command);
continue;
}
handle_parallel_builtins(command, NULL, NULL, mode);
cpid = fork();
if (cpid == 0) {
char *tempcommand;
tempcommand = prepend_path(command, head);
command[0] = tempcommand;
if (execv(command[0], command) < 0) {
fprintf(stderr, "execv failed: %s\n", strerror(errno));
printf("That's not a valid command! \n");
free_tokens(command);
exit(EXIT_FAILURE);
}
free(tempcommand);
}
else {
int status = 0;
w = wait(&status);
i++;
}
free_tokens(command);
}
return return_char;
}
/*
* Runs commands in parallel mode, with support for background processes.
*/
char parallel_mode(char **pointers_to_commands, Node *head, Node **paused_list, Node **cpidlist) {
int count = 0; // counts the no. of times we've been in the loop;
// if more than 1, we need to free
// pointers_to_commands, which is different from what we got from main.
while (1) {
count++;
char mode = 'p';
pid_t cpid;
char **command;
char return_char = 'p';
int i = 0;
while (pointers_to_commands[i] != NULL) {
command = tokenify(pointers_to_commands[i], " \n\t");
if (command[0] == NULL) {
i++;
free_tokens(command);
continue;
}
if (handle_exit(command) != 'n') {
if (*cpidlist == NULL && pointers_to_commands[i+1] == NULL) {
return_char = 'e';
}
else {
printf("There are processes still running. You cannot exit yet. \n");
}
free_tokens(command);
i++;
continue;
}
if (is_mode(command)) {
return_char = handle_mode(command, mode, return_char);
if (return_char == 's') {
if (*cpidlist != NULL || pointers_to_commands[i+1] != NULL) {
printf("There are processes running. You cannot switch modes yet.\n");
return_char = 'p';
}
}
free_tokens(command);
i++;
continue;
}
if (handle_parallel_builtins(command, paused_list, cpidlist, mode) == 1) {
i++;
free_tokens(command);
continue;
}
cpid = fork();
if (cpid == 0) {
char *tempcommand;
tempcommand = prepend_path(command, head);
command[0]= tempcommand;
if (execv(command[0], command) < 0) {
fprintf(stderr, "execv failed: %s\n", strerror(errno));
printf("That's not a valid command! \n");
free_tokens(command);
exit(EXIT_FAILURE);
}
}
else {
char whole_command[128];
memset(whole_command, '\0', 128);
strcat(whole_command, command[0]);
if (command[1] != NULL) {
strcat(whole_command, " ");
strcat(whole_command, command[1]);
}
char cpidstr[128];
sprintf(cpidstr, "%d", cpid);
list_append(cpidstr, whole_command, cpidlist);
}
i++;
free_tokens(command);
}
if (count > 1) {
free_tokens(pointers_to_commands);
}
if (return_char != 'p') {
return return_char;
}
struct pollfd pfd[1];
pfd[0].fd = 0;
pfd[0].events = POLLIN;
pfd[0].revents = 0;
display_prompt();
int some_process_completed = 0;
while (1) {
int status;
int rv = poll(&pfd[0], 1, 800);
Node *to_delete_list = NULL;
Node *tempcpidlist = *cpidlist;
pid_t w;
if (rv == 0) {
some_process_completed = 0;
while (tempcpidlist != NULL) {
w = atoi(tempcpidlist->data);
// I know that the ideal way to check for child process death is to use a macro such as WIFEXITED on status,
// but it wasn't working for me.
// status always had the value 0. So I'm doing this instead to check for process completion.
if (waitpid(w, &status, WUNTRACED|WNOHANG) == -1) {
list_append(tempcpidlist->data, "", &to_delete_list);
printf("\nProcess %s (%s) completed.\n", tempcpidlist->data, tempcpidlist->additional_data);
some_process_completed = 1;
}
tempcpidlist = tempcpidlist->next;
}
Node *curr = to_delete_list;
while (curr != NULL) {
list_delete(curr->data, cpidlist);
curr = curr->next;
}
list_clear(to_delete_list);
if (some_process_completed == 1) {
display_prompt();
}
}
else if (rv > 0) {
char buffer[1024];
if (fgets(buffer, 1024, stdin) == NULL) {
if (*cpidlist != NULL) {
printf("There are processes still running. You can't exit now.\n");
display_prompt();
}
else {
return_char = 'e';
return return_char;
}
}
else {
char *newbuffer = replace_pound(buffer);
newbuffer[strlen(newbuffer)-1] = '\0';
pointers_to_commands = tokenify(newbuffer, ";");
free(newbuffer);
break;
}
}
else {
printf("there was some kind of error: %s \n", strerror(errno));
}
}
}
}
/*! \brief
* Prepend own uri to Path header and append received address as
* "received"-param to that uri and take care of given user.
*/
int add_path_received_usr(struct sip_msg* _msg, char* _usr, char* _b)
{
return prepend_path(_msg, (str*)_usr, PATH_PARAM_RECEIVED);
}
/*! \brief
* Prepend own uri to Path header and append received address as
* "received"-param to that uri.
*/
int add_path_received(struct sip_msg* _msg, char* _a, char* _b)
{
str user = {0,0};
return prepend_path(_msg, &user, PATH_PARAM_RECEIVED);
}
/*! \brief
* Prepend own uri to Path header and take care of given
* user.
*/
int add_path_usr(struct sip_msg* _msg, char* _usr, char* _b)
{
return prepend_path(_msg, (str*)_usr, PATH_PARAM_NONE);
}
