1 files changed, 82 insertions, 2 deletions
diff --git a/src/tar.c b/src/tar.c
index 0afcb28..cc8eaa0 100644
--- a/src/tar.c
+++ b/src/tar.c
@@ -1,5 +1,26 @@
 #include "config.h"
 #include "tar.h"
+#include "logerr.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdbool.h>
+
+/*
+
+About the ustar format:
+- name[100] can only contain 100 bytes, while PATH_MAX's minimum value is 256
+  for `_POSIX_PATH_MAX`, and 1024 for _XOPEN_PATH_MAX.  Wait!  Actually there is
+  a "prefix" field, which is probably what I'm looking for;
+- characters are encoded in ISO/IEC 646:1991 [0] instead of UTF-8, even though
+  it requires the file names to be conformant to the POSIX filename
+  restrictions;
+
+[0]: https://en.wikipedia.org/wiki/ISO/IEC_646
+
+*/
 
 /*
  * Implementation of the "ustar archive tape" (tar) format, conformant to the
@@ -8,9 +29,68 @@
  * [0]: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html#tag_20_92_13_06
  */
 
-int tarball_write_from_directory(const char *const directory_path) {
+
+static void logerr(
+	const char *const s,
+	const char *const msg,
+	const int lineno
+) {
+	logerr_file(s, msg, __FILE__, lineno);
+}
+
+static void logerrs(
+	const char *const pre,
+	const char *const mid,
+	const char *const post,
+	const char *const msg,
+	const int lineno
+) {
+	logerrs_file(pre, mid, post, msg, __FILE__, lineno);
+}
+
+static void logerrl(
+	const char *const pre,
+	const size_t mid,
+	const char *const post,
+	const char *const msg,
+	const int lineno
+) {
+	logerrl_file(pre, mid, post, msg, __FILE__, lineno);
+}
+
+
+struct TarEntry {
+	// What size the spec says?
+	unsigned int begin;
+};
+
+// static int tar_write(FILE *const fd, 
+
+int tarball_write_from_directory(
+	FILE *const fd,
+	const char *const directory_path
+) {
+	int ret = 0;
+	struct TarEntry *entry = NULL;
 	(void)directory_path;
-	return 0;
+	(void)fd;
+
+	if (!(entry = malloc(sizeof(struct TarEntry)))) {
+		logerrl("malloc(", sizeof(struct TarEntry), ")",
+			strerror(errno), __LINE__);
+			ret = -1;
+			goto cleanup;
+	}
+
+	if (false) {
+		logerrs("", "", "", "", 0);
+		logerr("", "", 0);
+	}
+
+
+cleanup:
+	free(entry);
+	return ret;
 }
 
 #ifdef TEST