1 files changed, 68 insertions, 0 deletions
diff --git a/42sh/src/builtins/export.c b/42sh/src/builtins/export.c
new file mode 100644
index 0000000..358cfc7
--- /dev/null
+++ b/42sh/src/builtins/export.c
@@ -0,0 +1,68 @@
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "builtins.h"
+#include "utils/env.h"
+
+extern char **environ;
+
+void printenv(void)
+{
+    size_t i = 0;
+    while (environ[i] != NULL)
+    {
+        printf("export %s\n", environ[i]);
+        i += 1;
+    }
+}
+
+void export_var(struct string *arg)
+{
+    char *equal = strchr(arg->data, '=');
+    if (equal != NULL)
+    {
+        size_t len = equal - arg->data;
+        char *var = malloc(len + 1);
+        memcpy(var, arg->data, len);
+        char *value = equal + 1;
+        var[len] = '\0';
+        env_set(var, value);
+        free(var);
+    }
+    else
+    {
+        env_set(arg->data, "");
+    }
+}
+
+int export(struct string **args)
+{
+    if (args[0] == NULL)
+    {
+        printenv();
+        fflush(stdout);
+        return 0;
+    }
+    int flagp = 0;
+    size_t i = 0;
+    if (strcmp(args[0]->data, "-p") == 0)
+    {
+        flagp = 1;
+        i += 1;
+    }
+    if (args[1] == NULL && flagp)
+    {
+        printenv();
+        fflush(stdout);
+        return 0;
+    }
+    while (args[i] != NULL)
+    {
+        export_var(args[i]);
+        i += 1;
+    }
+    fflush(stdout);
+    return 0;
+}