Add basic support for the GNU tar format

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

4 files changed, 102 insertions, 0 deletions

diff --git a/tests/tar_formats.c b/tests/tar_formats.c
index 58cd223..a9dcbc3 100644
--- a/tests/tar_formats.c
+++ b/tests/tar_formats.c
@@ -102,5 +102,39 @@ int main(void)
 	clear_header(&hdr);
 	close(fd);
 
+	fd = open_read("format-acceptance/gnu.tar");
+	assert(read_header(fd, &hdr) == 0);
+	assert(hdr.sb.st_mode == (S_IFREG | 0644));
+	assert(hdr.sb.st_uid == 01750);
+	assert(hdr.sb.st_gid == 01750);
+	assert(hdr.sb.st_size == 5);
+	assert(hdr.sb.st_mtime == 1542905892);
+	assert(hdr.sb.st_atime == 1542905892);
+	assert(hdr.sb.st_ctime == 1542905892);
+	assert(strcmp(hdr.name, "input.txt") == 0);
+	assert(!hdr.unknown_record);
+	assert(read_retry(fd, buffer, 5) == 5);
+	buffer[5] = '\0';
+	assert(strcmp(buffer, "test\n") == 0);
+	clear_header(&hdr);
+	close(fd);
+
+	fd = open_read("format-acceptance/gnu-g.tar");
+	assert(read_header(fd, &hdr) == 0);
+	assert(hdr.sb.st_mode == (S_IFREG | 0644));
+	assert(hdr.sb.st_uid == 01750);
+	assert(hdr.sb.st_gid == 01750);
+	assert(hdr.sb.st_size == 5);
+	assert(hdr.sb.st_mtime == 013375560044);
+	assert(hdr.sb.st_atime == 013375561762);
+	assert(hdr.sb.st_ctime == 013375561750);
+	assert(strcmp(hdr.name, "input.txt") == 0);
+	assert(!hdr.unknown_record);
+	assert(read_retry(fd, buffer, 5) == 5);
+	buffer[5] = '\0';
+	assert(strcmp(buffer, "test\n") == 0);
+	clear_header(&hdr);
+	close(fd);
+
 	return EXIT_SUCCESS;
 }
diff --git a/tests/tar_large_uid.c b/tests/tar_large_uid.c
index 8a86c03..36ef222 100644
--- a/tests/tar_large_uid.c
+++ b/tests/tar_large_uid.c
@@ -68,5 +68,22 @@ int main(void)
 	clear_header(&hdr);
 	close(fd);
 
+	fd = open_read("user-group-largenum/gnu.tar");
+	assert(read_header(fd, &hdr) == 0);
+	assert(hdr.sb.st_mode == (S_IFREG | 0644));
+	assert(hdr.sb.st_uid == 0x80000000);
+	assert(hdr.sb.st_gid == 0x80000000);
+	assert(hdr.sb.st_size == 5);
+	assert(hdr.sb.st_mtime == 013376036700);
+	assert(hdr.sb.st_atime == 013376036700);
+	assert(hdr.sb.st_ctime == 013376036700);
+	assert(strcmp(hdr.name, "input.txt") == 0);
+	assert(!hdr.unknown_record);
+	assert(read_retry(fd, buffer, 5) == 5);
+	buffer[5] = '\0';
+	assert(strcmp(buffer, "test\n") == 0);
+	clear_header(&hdr);
+	close(fd);
+
 	return EXIT_SUCCESS;
 }
diff --git a/tests/tar_long_paths.c b/tests/tar_long_paths.c
index 2615a61..a19a235 100644
--- a/tests/tar_long_paths.c
+++ b/tests/tar_long_paths.c
@@ -73,5 +73,22 @@ int main(void)
 	clear_header(&hdr);
 	close(fd);
 
+	fd = open_read("long-paths/gnu.tar");
+	assert(read_header(fd, &hdr) == 0);
+	assert(hdr.sb.st_mode == (S_IFREG | 0644));
+	assert(hdr.sb.st_uid == 01750);
+	assert(hdr.sb.st_gid == 01750);
+	assert(hdr.sb.st_size == 5);
+	assert(hdr.sb.st_mtime == 1542909670);
+	assert(hdr.sb.st_atime == 1542909670);
+	assert(hdr.sb.st_ctime == 1542909670);
+	assert(strcmp(hdr.name, filename) == 0);
+	assert(!hdr.unknown_record);
+	assert(read_retry(fd, buffer, 5) == 5);
+	buffer[5] = '\0';
+	assert(strcmp(buffer, "test\n") == 0);
+	clear_header(&hdr);
+	close(fd);
+
 	return EXIT_SUCCESS;
 }
diff --git a/tests/tar_mtime.c b/tests/tar_mtime.c
index 30d4bc4..b255656 100644
--- a/tests/tar_mtime.c
+++ b/tests/tar_mtime.c
@@ -51,6 +51,23 @@ int main(void)
 	clear_header(&hdr);
 	close(fd);
 
+	fd = open_read("large-mtime/gnu.tar");
+	assert(read_header(fd, &hdr) == 0);
+	assert(hdr.sb.st_mode == (S_IFREG | 0644));
+	assert(hdr.sb.st_uid == 01750);
+	assert(hdr.sb.st_gid == 01750);
+	assert(hdr.sb.st_size == 5);
+	assert(hdr.sb.st_mtime == 8589934592);
+	assert(hdr.sb.st_atime == 8589934592);
+	assert(hdr.sb.st_ctime == 8589934592);
+	assert(strcmp(hdr.name, "input.txt") == 0);
+	assert(!hdr.unknown_record);
+	assert(read_retry(fd, buffer, 5) == 5);
+	buffer[5] = '\0';
+	assert(strcmp(buffer, "test\n") == 0);
+	clear_header(&hdr);
+	close(fd);
+
 	fd = open_read("large-mtime/pax.tar");
 	assert(read_header(fd, &hdr) == 0);
 	assert(hdr.sb.st_mode == (S_IFREG | 0644));
@@ -85,5 +102,22 @@ int main(void)
 	clear_header(&hdr);
 	close(fd);
 
+	fd = open_read("negative-mtime/gnu.tar");
+	assert(read_header(fd, &hdr) == 0);
+	assert(hdr.sb.st_mode == (S_IFREG | 0644));
+	assert(hdr.sb.st_uid == 01750);
+	assert(hdr.sb.st_gid == 01750);
+	assert(hdr.sb.st_size == 5);
+	assert(hdr.sb.st_mtime == -315622800);
+	assert(hdr.sb.st_atime == -315622800);
+	assert(hdr.sb.st_ctime == -315622800);
+	assert(strcmp(hdr.name, "input.txt") == 0);
+	assert(!hdr.unknown_record);
+	assert(read_retry(fd, buffer, 5) == 5);
+	buffer[5] = '\0';
+	assert(strcmp(buffer, "test\n") == 0);
+	clear_header(&hdr);
+	close(fd);
+
 	return EXIT_SUCCESS;
 }