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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "array.h"
#include "errno.h"
#include "stdbool.h"
void print_prompt(char const *const original_wd, char const *current_wd);
// Returns the return code of the executed programm
int exec_command(char *command);
int main(void) {
// the directory is specified without a / at the end
char const *const original_wd = get_current_dir_name();
char const *current_wd = get_current_dir_name();
while (true) {
char *command = NULL;
size_t cap = 0;
size_t length = 0;
print_prompt(original_wd, current_wd);
if ((length = getline(&command, &cap, stdin)) < 0) {
fprintf(stderr, "Failed to read from STDIN");
exit(-1);
}
if (strstr(command, "cd") != NULL) {
printf("Changing dirs \n");
chdir("beispiele");
free((void *) current_wd);
current_wd = get_current_dir_name();
} else if (strcmp(command, "exit\n") == 0) {
exit(0);
} else {
exec_command(command);
}
free((void *)command);
}
// Gotta cast to void otherwise we discard qualifiers
free((void *)original_wd);
free((void *)current_wd);
}
void print_prompt(char const *const original_wd, char const *const current_wd) {
// easiest case first
{
int result = strcmp(original_wd, current_wd);
if (result == 0) {
printf(".> ");
return;
}
}
printf("%s > ", current_wd);
// Now checking for substrings aka are we in a subdir
{
size_t dirlen = strlen(original_wd);
char *const orig_dir_with_slash = malloc(dirlen + 2);
if (orig_dir_with_slash == NULL) {
fprintf(stderr, "Failed to allocate for prompt");
exit(ENOMEM);
}
memcpy(orig_dir_with_slash, original_wd, dirlen);
orig_dir_with_slash[dirlen] = '/';
orig_dir_with_slash[dirlen + 1] = '\0';
char const *const result = strstr(current_wd, original_wd);
if (result != NULL) {
printf(".%s > ", current_wd + dirlen);
return;
}
}
}
int exec_command(char *command) { return 0; }
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