1 files changed, 77 insertions, 0 deletions
diff --git a/02_exercise/shell.c b/02_exercise/shell.c
new file mode 100644
index 0000000..dd0085d
--- /dev/null
+++ b/02_exercise/shell.c
@@ -0,0 +1,77 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdbool.h>
+
+#include "array.h"
+#include "process.h"
+#include "prompt_utils.h"
+
+
+int main(void) {
+    chdir(".");
+    setvbuf(stdout, NULL, _IONBF, 0);
+
+    char const *const original_wd = get_current_dir_name();
+    char const *prompt = relative_path(original_wd, original_wd);
+    bool done = false;
+    while (!done) {
+        char *line = NULL;
+        size_t cap = 0;
+        __ssize_t length = 0;
+
+        printf("%s > ", prompt);
+        if ((length = getline(&line, &cap, stdin)) < 0) {
+            fprintf(stderr, "Failed to read from STDIN");
+            exit(-1);
+        }
+
+        if (strspn(line, " \n\t") == strlen(line)) {
+            continue;
+        }
+        line[length - 1] = '\0'; // cut the line feed
+
+        Process * processes = NULL;
+        parse_line(line, &processes);
+
+        if (strcmp(processes[0].argv[0], "cd") == 0) {
+
+            if(arrayLen(processes) != 1) {
+                perror("Can't chain cd with other processes");
+            }
+            if (arrayLen(processes[0].argv) != 3) {
+                fprintf(stderr, "usage: cd <path>");
+                goto clean;
+            }
+
+            int ret = chdir(processes[0].argv[1]);
+            if (ret)
+                printf("[%i] ", ret);
+
+            free((void *)prompt);
+            char const *current_wd = get_current_dir_name();
+            prompt = relative_path(original_wd, current_wd);
+            free((void *)current_wd);
+        } else if (strcmp(processes[0].argv[0], "exit") == 0) {
+            done = true;
+        } else {
+            int ret;
+            for (size_t i = 0; i < arrayLen(processes); ++i) {
+                ret = exec_command(processes[i]);
+                if (ret)
+                    printf("[%i] ", ret);
+            }
+
+        }
+
+        clean:
+        free((void *)line);
+        line = NULL;
+        cap = 0;
+        free_processes(&processes);
+    }
+
+    free((void *)original_wd);
+    free((void *)prompt);
+}