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This commit is contained in:
Ben Harris 2016-11-02 11:18:26 -04:00
parent 7066b558d3
commit 08ad9a8b2b
1 changed files with 51 additions and 19 deletions
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bish.cc
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@ -24,13 +24,13 @@ vector<string> split(const char *str, char c = ' '){
vector<string> result;
do {
const char *begin = str;
while(*str != c && *str) str++;
while (*str != c && *str) str++;
result.push_back(string(begin, str));
} while (0 != *str++);
return result;
}
char** parse_args(vector<string> vargs) {
char** v_to_cpp(vector<string> vargs) {
char** args = new char *[vargs.size()+1];
// http://stackoverflow.com/questions/26032039/convert-vectorstring-into-char-c
for (size_t i = 0; i < vargs.size(); ++i) {
@ -44,33 +44,65 @@ char** parse_args(vector<string> vargs) {
int main(int argc, char **argv){
string line;
int done = 0;
static char* line = (char*)NULL;
vector<string> path = split(getenv("PATH"), ':');
// build prompt
stringstream prompt;
prompt << "\e[92m" << get_current_dir_name() << " $\e[0m ";
// set up history
using_history();
read_history("~/.bish_history");
// register ctrl c handler
signal(SIGINT, ctrl_c_handler);
stringstream prompt;
prompt << "\e[92m" << get_current_dir_name() << " $\e[0m ";
while (!done) {
// Do stuff if the ctrl c flag is set?
// if (flag) {
// printf("\n");
// continue;
// flag = 0;
// }
static char* line_read = (char*)NULL;
while ((line_read = readline(prompt.str().c_str()))) {
// read the line and split it into a char**
line = readline(prompt.str().c_str());
// if (!line) {
// done = 1;
// break;
// }
if (flag) {
printf("\n");
continue;
flag = 0;
}
// if (line[0]) {
// char *expansion;
// int result;
// result = history_expand(line, &expansion);
// if (result) {
// fprintf(stderr, "%s\n", expansion);
// }
// if (result < 0 || result == 2) {
// free(expansion);
// continue;
// }
// add_history(expansion);
// strncpy(line, expansion, sizeof(line) - 1);
// free(expansion);
// } else done = 1;
char **args = parse_args(split(line_read));
if (line_read) {
free(line_read);
line_read = (char*)NULL;
if (line && *line) add_history (line);
else { done = 1; continue; }
char **args = v_to_cpp(split(line));
if (line) {
free(line);
line = (char*)NULL;
}
// handle exit
// http://www.linuxquestions.org/questions/programming-9/making-a-c-shell-775690/
if (strcmp(args[0], "exit") == 0) return 0;
if (strcmp(args[0], "exit") == 0) { done = 1; continue; };
// handle chdir
if (!strcmp(args[0], "cd")) {
if (args[1] == NULL) {
@ -107,7 +139,7 @@ int main(int argc, char **argv){
}
// nothing found here...
perror("child process");
perror("bish");
}
// parent waits for kid to die
else {
@ -133,7 +165,7 @@ int main(int argc, char **argv){
}
delete[] args;
// cout << "\e[92m" << get_current_dir_name() << " $\e[0m ";
}
write_history("~/.bish_history");
return 0;
}