1 files changed, 65 insertions, 0 deletions
diff --git a/src/thee.c b/src/thee.c
new file mode 100644
index 0000000..a82a290
--- /dev/null
+++ b/src/thee.c
@@ -0,0 +1,65 @@
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "io/read_file.h"
+#include "util/option.h"
+
+static const char *usage_string =
+  "Gebruik: %s [OPTIES]... [BESTANDEN]...\n"
+  "\n"
+  "Lees van standaard invoer en schrijf naar standaard uitvoer en bestanden\n"
+  "\n"
+  "  -a    Voeg de invoer aan het einde van BESTAND toe, schrijf BESTANDEN niet over\n"
+  "  -h    Toon deze hulptekst\n"
+  "  -V    Toon versienummer\n";
+
+struct options {
+  bool append;
+};
+
+// Returns pointer to argument array containing the file names
+static char** parse_options(int argc, char **argv, struct options *opts) {
+  const struct option_spec spec[] = {
+    {'a', OPTION_SETBOOL(&opts->append)},
+    {'h', OPTION_HELPUSAGE(usage_string)},
+    {'V', OPTION_VERSION()},
+    OPTION_SPEC_END
+  };
+
+  return option_parse(argc, argv, spec);
+}
+
+static void process(struct filebuf *fb, FILE *file) {
+  fwrite(fb->buf, 1, fb->sz, file);
+  if (fflush(file) != 0) {
+    fprintf(stderr, "thee: Fout tijdens spoelen van bestand\n");
+    exit(1);
+  }
+}
+
+int entry_thee(int argc, char **argv) {
+  int res = 0;
+
+  struct options opts = {0};
+  char **args = parse_options(argc, argv, &opts);
+
+  struct filebuf *fb = stream_to_filebuf(stdin, O_NOALLOWMAP);
+
+  //process(fb, stdout);
+  for (int i = 0; args[i]; i++) {
+    FILE *file = fopen(args[i], opts.append ? "a" : "w");
+    if (!file) {
+      fprintf(stderr, "thee: Kan doelbestand niet openen\n");
+      res = 1;
+      goto done;
+    }
+
+    process(fb, file);
+    fclose(file);
+  }
+
+done:
+  return res;
+}