fileops/repository: create (most) directories with 0777 permissions

To further match how Git behaves, this change makes most of the
directories libgit2 creates in a git repo have a file mode of
0777. Specifically:

- Intermediate directories created with git_futils_mkpath2file() have
  0777 permissions. This affects odb_loose, reflog, and refs.

- The top level folder for bare repos is created with 0777
  permissions.

- The top level folder for non-bare repos is created with 0755
  permissions.

- /objects/info/, /objects/pack/, /refs/heads/, and /refs/tags/ are
  created with 0777 permissions.

Additionally, the following changes have been made:

- fileops functions that create intermediate directories have grown a
  new dirmode parameter. The only exception to this is filebuf's
  lock_file(), which unconditionally creates intermediate directories
  with 0777 permissions when GIT_FILEBUF_FORCE is set.

- The test runner now sets the umask to 0 before running any
  tests. This ensurses all file mode checks are consistent across
  systems.

- t09-tree.c now does a directory permissions check. I've avoided
  adding this check to other tests that might reuse existing
  directories from the prefabricated test repos. Because they're
  checked into the repo, they have 0755 permissions.

- Other assorted directories created by tests have 0777 permissions.

9 files changed, 65 insertions, 21 deletions

diff --git a/tests/t00-core.c b/tests/t00-core.c
index 703504bf8..185681562 100644
--- a/tests/t00-core.c
+++ b/tests/t00-core.c
@@ -250,14 +250,14 @@ static int setup(walk_data *d)
 {
 	name_data *n;
 
-	if (p_mkdir(top_dir, 0755) < 0)
+	if (p_mkdir(top_dir, 0777) < 0)
 		return error("can't mkdir(\"%s\")", top_dir);
 
 	if (p_chdir(top_dir) < 0)
 		return error("can't chdir(\"%s\")", top_dir);
 
 	if (strcmp(d->sub, ".") != 0)
-		if (p_mkdir(d->sub, 0755) < 0)
+		if (p_mkdir(d->sub, 0777) < 0)
 			return error("can't mkdir(\"%s\")", d->sub);
 
 	strcpy(path_buffer, d->sub);
@@ -510,27 +510,27 @@ static int setup_empty_tmp_dir(void)
 {
 	char path[GIT_PATH_MAX];
 
-	if (p_mkdir(empty_tmp_dir, 0755))
+	if (p_mkdir(empty_tmp_dir, 0777))
 		return -1;
 
 	git_path_join(path, empty_tmp_dir, "/one");
-	if (p_mkdir(path, 0755))
+	if (p_mkdir(path, 0777))
 		return -1;
 
 	git_path_join(path, empty_tmp_dir, "/one/two_one");
-	if (p_mkdir(path, 0755))
+	if (p_mkdir(path, 0777))
 		return -1;
 
 	git_path_join(path, empty_tmp_dir, "/one/two_two");
-	if (p_mkdir(path, 0755))
+	if (p_mkdir(path, 0777))
 		return -1;
 
 	git_path_join(path, empty_tmp_dir, "/one/two_two/three");
-	if (p_mkdir(path, 0755))
+	if (p_mkdir(path, 0777))
 		return -1;
 
 	git_path_join(path, empty_tmp_dir, "/two");
-	if (p_mkdir(path, 0755))
+	if (p_mkdir(path, 0777))
 		return -1;
 
 	return 0;
@@ -547,7 +547,7 @@ BEGIN_TEST(rmdir1, "make sure non-empty dir cannot be deleted recusively")
 
 	must_pass(setup_empty_tmp_dir());
 	git_path_join(file, empty_tmp_dir, "/two/file.txt");
-	fd = p_creat(file, 0755);
+	fd = p_creat(file, 0777);
 	must_pass(fd);
 	must_pass(p_close(fd));
 	must_fail(git_futils_rmdir_r(empty_tmp_dir, 0));
diff --git a/tests/t03-objwrite.c b/tests/t03-objwrite.c
index 31f611a5c..7563d0e3a 100644
--- a/tests/t03-objwrite.c
+++ b/tests/t03-objwrite.c
@@ -31,7 +31,7 @@ static char *odb_dir = "test-objects";
 
 static int make_odb_dir(void)
 {
-	if (p_mkdir(odb_dir, 0755) < 0) {
+	if (p_mkdir(odb_dir, GIT_OBJECT_DIR_MODE) < 0) {
 		int err = errno;
 		fprintf(stderr, "can't make directory \"%s\"", odb_dir);
 		if (err == EEXIST)
diff --git a/tests/t06-index.c b/tests/t06-index.c
index 621e742b3..dde98abaf 100644
--- a/tests/t06-index.c
+++ b/tests/t06-index.c
@@ -176,7 +176,7 @@ BEGIN_TEST(add0, "add a new file to the index")
 	must_pass(git_index_entrycount(index) == 0);
 
 	/* Create a new file in the working directory */
-	must_pass(git_futils_mkpath2file(TEMP_REPO_FOLDER "myrepo/test.txt"));
+	must_pass(git_futils_mkpath2file(TEMP_REPO_FOLDER "myrepo/test.txt", 0777));
 	must_pass(git_filebuf_open(&file, TEMP_REPO_FOLDER "myrepo/test.txt", 0));
 	must_pass(git_filebuf_write(&file, "hey there\n", 10));
 	must_pass(git_filebuf_commit(&file));
diff --git a/tests/t09-tree.c b/tests/t09-tree.c
index 3af06ea67..1f2fe3f02 100644
--- a/tests/t09-tree.c
+++ b/tests/t09-tree.c
@@ -200,6 +200,9 @@ BEGIN_TEST(write3, "write a hierarchical tree from a memory")
 	// check data is correct
 	must_pass(git_tree_lookup(&tree, repo, &id_hiearar));
 	must_be_true(2 == git_tree_entrycount(tree));
+#ifndef GIT_WIN32
+	must_be_true((loose_object_dir_mode(TEMP_REPO_FOLDER, (git_object *)tree) & 0777) == GIT_OBJECT_DIR_MODE);
+#endif
 	git_tree_close(tree);
 
 	close_temp_repo(repo);
diff --git a/tests/t10-refs.c b/tests/t10-refs.c
index aa6735a30..4cb31d5e7 100644
--- a/tests/t10-refs.c
+++ b/tests/t10-refs.c
@@ -431,12 +431,11 @@ END_TEST
 BEGIN_TEST(pack0, "create a packfile for an empty folder")
 	git_repository *repo;
 	char temp_path[GIT_PATH_MAX];
-	const mode_t mode = 0755; /* or 0777 ? */
 
 	must_pass(open_temp_repo(&repo, REPOSITORY_FOLDER));
 
 	git_path_join_n(temp_path, 3, repo->path_repository, GIT_REFS_HEADS_DIR, "empty_dir");
-	must_pass(git_futils_mkdir_r(temp_path, mode));
+	must_pass(git_futils_mkdir_r(temp_path, GIT_REFS_DIR_MODE));
 
 	must_pass(git_reference_packall(repo));
 
diff --git a/tests/t12-repo.c b/tests/t12-repo.c
index 6884188a3..c07150c9c 100644
--- a/tests/t12-repo.c
+++ b/tests/t12-repo.c
@@ -173,7 +173,7 @@ END_TEST
 BEGIN_TEST(init2, "Initialize and open a bare repo with a relative path escaping out of the current working directory")
 	char path_repository[GIT_PATH_MAX];
 	char current_workdir[GIT_PATH_MAX];
-	const mode_t mode = 0755; /* or 0777 ? */
+	const mode_t mode = 0777;
 	git_repository* repo;
 
 	must_pass(p_getcwd(current_workdir, sizeof(current_workdir)));
@@ -232,7 +232,7 @@ BEGIN_TEST(open2, "Open a bare repository with a relative path escaping out of t
 	char current_workdir[GIT_PATH_MAX];
 	char path_repository[GIT_PATH_MAX];
 
-	const mode_t mode = 0755; /* or 0777 ? */
+	const mode_t mode = 0777;
 	git_repository* repo;
 
 	/* Setup the repository to open */
@@ -351,7 +351,7 @@ static int write_file(const char *path, const char *content)
 			return error;
 	}
 
-	file = git_futils_creat_withpath(path, 0644);
+	file = git_futils_creat_withpath(path, 0777, 0644);
 	if (file < GIT_SUCCESS)
 		return file;
 
@@ -384,7 +384,7 @@ BEGIN_TEST(discover0, "test discover")
 	char repository_path[GIT_PATH_MAX];
 	char sub_repository_path[GIT_PATH_MAX];
 	char found_path[GIT_PATH_MAX];
-	mode_t mode = 0755;
+	const mode_t mode = 0777;
 
 	git_futils_mkdir_r(DISCOVER_FOLDER, mode);
 	must_pass(append_ceiling_dir(ceiling_dirs, TEMP_REPO_FOLDER));
diff --git a/tests/test_helpers.c b/tests/test_helpers.c
index 0900430e1..7074e4822 100644
--- a/tests/test_helpers.c
+++ b/tests/test_helpers.c
@@ -42,7 +42,7 @@ int write_object_data(char *file, void *data, size_t len)
 
 int write_object_files(const char *odb_dir, object_data *d)
 {
-	if (p_mkdir(odb_dir, 0755) < 0) {
+	if (p_mkdir(odb_dir, GIT_OBJECT_DIR_MODE) < 0) {
 		int err = errno;
 		fprintf(stderr, "can't make directory \"%s\"", odb_dir);
 		if (err == EEXIST)
@@ -51,7 +51,7 @@ int write_object_files(const char *odb_dir, object_data *d)
 		return -1;
 	}
 
-	if ((p_mkdir(d->dir, 0755) < 0) && (errno != EEXIST)) {
+	if ((p_mkdir(d->dir, GIT_OBJECT_DIR_MODE) < 0) && (errno != EEXIST)) {
 		fprintf(stderr, "can't make object directory \"%s\"\n", d->dir);
 		return -1;
 	}
@@ -82,7 +82,7 @@ int remove_object_files(const char *odb_dir, object_data *d)
 	return 0;
 }
 
-int remove_loose_object(const char *repository_folder, git_object *object)
+void locate_loose_object(const char *repository_folder, git_object *object, char **out, char **out_folder)
 {
 	static const char *objects_folder = "objects/";
 
@@ -104,6 +104,40 @@ int remove_loose_object(const char *repository_folder, git_object *object)
 	ptr += GIT_OID_HEXSZ + 1;
 	*ptr = 0;
 
+	*out = full_path;
+
+	if (out_folder)
+		*out_folder = top_folder;
+}
+
+int loose_object_dir_mode(const char *repository_folder, git_object *object)
+{
+	char *object_path;
+	size_t pos;
+	struct stat st;
+
+	locate_loose_object(repository_folder, object, &object_path, NULL);
+
+	pos = strlen(object_path);
+	while (pos--) {
+		if (object_path[pos] == '/') {
+			object_path[pos] = 0;
+			break;
+		}
+	}
+
+	assert(p_stat(object_path, &st) == 0);
+	free(object_path);
+
+	return st.st_mode;
+}
+
+int remove_loose_object(const char *repository_folder, git_object *object)
+{
+	char *full_path, *top_folder;
+
+	locate_loose_object(repository_folder, object, &full_path, &top_folder);
+
 	if (p_unlink(full_path) < 0) {
 		fprintf(stderr, "can't delete object file \"%s\"\n", full_path);
 		return -1;
@@ -141,7 +175,7 @@ int copy_file(const char *src, const char *dst)
 	if (git_futils_readbuffer(&source_buf, src) < GIT_SUCCESS)
 		return GIT_ENOTFOUND;
 
-	dst_fd = git_futils_creat_withpath(dst, 0644);
+	dst_fd = git_futils_creat_withpath(dst, 0777, 0644);
 	if (dst_fd < 0)
 		goto cleanup;
 
diff --git a/tests/test_helpers.h b/tests/test_helpers.h
index 53361b7b1..2e5194d7c 100644
--- a/tests/test_helpers.h
+++ b/tests/test_helpers.h
@@ -63,6 +63,10 @@ extern int remove_object_files(const char *odb_dir, object_data *d);
 
 extern int cmp_objects(git_rawobj *o, object_data *d);
 
+extern void locate_loose_object(const char *odb_dir, git_object *object, char **out, char **out_folder);
+
+extern int loose_object_dir_mode(const char *odb_dir, git_object *object);
+
 extern int remove_loose_object(const char *odb_dir, git_object *object);
 
 extern int cmp_files(const char *a, const char *b);
diff --git a/tests/test_main.c b/tests/test_main.c
index c9f8da3a4..9961ffd6b 100644
--- a/tests/test_main.c
+++ b/tests/test_main.c
@@ -26,6 +26,8 @@
 #include <string.h>
 #include <git2.h>
 
+#include "posix.h"
+
 #include "test_lib.h"
 #include "test_helpers.h"
 
@@ -81,6 +83,8 @@ main(int GIT_UNUSED(argc), char *GIT_UNUSED(argv[]))
 	GIT_UNUSED_ARG(argc);
 	GIT_UNUSED_ARG(argv);
 
+	p_umask(0);
+
 	failures = 0;
 
 	for (i = 0; i < GIT_SUITE_COUNT; ++i)