/* Construct command */
command* construct_command(char** tokens) {
/* Initialize a new command */
command *cmd = malloc(sizeof(command));
cmd->cmd1 = cmd->cmd2 = NULL;
cmd->scmd = NULL;
if (!is_complex_command(tokens)) {
/* Simple command */
cmd->scmd = malloc(sizeof(simple_command));
if (is_builtin(tokens[0])) {
cmd->scmd->builtin = 1;
cmd->scmd->tokens = tokens;
}
else {
cmd->scmd->builtin = 0;
int err = extract_redirections(tokens, cmd->scmd);
if (err == -1) {
printf("Error extracting redirections!\n");
return NULL;
}
}
}
else {
/* Complex command */
char **t1 = tokens, **t2;
int i = 0;
while(tokens[i]) {
if(is_operator(tokens[i])) {
strncpy(cmd->oper, tokens[i], 2);
tokens[i] = 0;
t2 = &(tokens[i+1]);
break;
}
i++;
}
/* Recursively construct the rest of the commands */
cmd->cmd1 = construct_command(t1);
cmd->cmd2 = construct_command(t2);
}
return cmd;
}
boost::filesystem::path CMDGraphRenderer::render_graph(const path& src_path, const path& dst_path, const std::string& name, const std::string& img_ext, const std::string& engine)
{
assert(boost::filesystem::exists(src_path) && boost::filesystem::is_regular_file(src_path) && "ERROR: CMDGraphRenderer: source path does not exist or is not a file");
std::string command;
std::string image_path;
construct_command(src_path, dst_path, name, img_ext, engine, command, image_path);
system(command.c_str());
return image_path;
}
int main(int argc, char** argv) {
char cwd[MAX_DIRNAME]; /* Current working directory */
char command_line[MAX_COMMAND]; /* The command */
char *tokens[MAX_TOKEN]; /* Command tokens (program name,
* parameters, pipe, etc.) */
while (1) {
/* Display prompt */
getcwd(cwd, MAX_DIRNAME-1);
printf("%s> ", cwd);
/* Read the command line */
fgets(command_line, MAX_COMMAND, stdin);
/* Strip the new line character */
if (command_line[strlen(command_line) - 1] == '\n') {
command_line[strlen(command_line) - 1] = '\0';
}
/* Parse the command into tokens */
parse_line(command_line, tokens);
/* Check for empty command */
if (!(*tokens)) {
continue;
}
/* Construct chain of commands, if multiple commands */
command *cmd = construct_command(tokens);
// print_command(cmd, 0);
int exitcode = 0;
if (cmd->scmd) {
exitcode = execute_simple_command(cmd->scmd);
if (exitcode == -1) {
release_command(cmd);
break;
}
}
else {
exitcode = execute_complex_command(cmd);
if (exitcode == -1) {
release_command(cmd);
break;
}
}
release_command(cmd);
}
return 0;
}
int main(int argc, char** argv) {
char cwd[MAX_DIRNAME]; /* Current working directory */
char command_line[MAX_COMMAND]; /* The command */
char *tokens[MAX_TOKEN]; /* Command tokens (program name, parameters, pipe, etc.) */
while (1) {
/* Display prompt */
getcwd(cwd, MAX_DIRNAME-1);
printf("%s> ", cwd);
/* Read the command line */
gets(command_line);
/* Parse the command into tokens */
parse_line(command_line, tokens);
/* Empty command */
if (!(*tokens))
continue;
/* Exit */
if (strcmp(tokens[0], "exit") == 0)
exit(0);
/* Construct chain of commands, if multiple commands */
command *cmd = construct_command(tokens);
int exitcode = 0;
if (cmd->scmd) {
exitcode = execute_simple_command(cmd->scmd);
if (exitcode == -1)
break;
}
else {
exitcode = execute_complex_command(cmd);
if (exitcode == -1)
break;
}
release_command(cmd);
}
return 0;
}
command_t parse_command_string (char *comString, int line)
{
char *ii = comString;
int endln = line;
while (*ii)
{
if (*ii == '\n')
endln++;
ii++;
}
com_text_t comText =
{
.start = comString,
.end = ii-1,
.startln = line,
.endln = endln
};
return parse_ao_string(*strip_text(&comText));
}
command_t parse_ao_string (com_text_t comText)
{
char *ii = comText.end;
bool haveWord = false;
int currln = comText.endln;
int subDepth = 0;
for ( ; ii >= comText.start; ii--)
{
// fprintf(stderr, "GOT HERE!");
if (*ii == '\n') currln--;
if (*ii == ')')
{
subDepth++;
haveWord = true;
}
if (*ii == '(')
{
subDepth--;
if (subDepth < 0)
{
error(1, 0, "%d: unmatched '('", currln);
}
}
if (subDepth != 0) continue;
if (*ii == '&' && *(ii+1) == '&')
{
if (!haveWord)
error(1, 0, "%d: expected command after '&&'", currln);
*ii = 0;
if (!anything_before(ii-1,comText.start))
error(1, 0, "%d: expected command before '&&'", currln);
com_text_t subComms[2]= {
{
.start = comText.start,
.end = ii-1,
.startln = comText.startln,
.endln = currln
},
{
.start = ii+2,
.end = comText.end,
.startln = currln,
.endln = comText.endln
}
};
return construct_command(AND_COMMAND, NULL, NULL,
parse_ao_string(*strip_text(&subComms[0])),
parse_pipe_string(*strip_text(&subComms[1])));
}
if (*ii == '|' && *(ii+1) == '|')
{
//fprintf(stderr, "GOT HERE!");
if (!haveWord) error(1, 0, "%d: expected command after '||'", currln);
*ii = 0;
if (!anything_before(ii-1,comText.start))
error(1, 0, "%d: expected command before '||'", currln);
com_text_t subComms[2]= {
{
.start = comText.start,
.end = ii-1,
.startln = comText.startln,
.endln = currln
},
{
.start = ii+2,
.end = comText.end,
.startln = currln,
.endln = comText.endln
}
};
return construct_command(OR_COMMAND, NULL, NULL,
parse_ao_string(*strip_text(&subComms[0])),
parse_pipe_string(*strip_text(&subComms[1])));
}
