t: add a test helper to truncate files
In a future commit, we're going to work with some large files which will be at least 4 GiB in size. To take advantage of the sparseness functionality on most Unix systems and avoid running the system out of disk, it would be convenient to use truncate(2) to simply create a sparse file of sufficient size. However, the GNU truncate(1) utility isn't portable, so let's write a tiny test helper that does the work for us. Signed-off-by: brian m. carlson <bk2204@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>maint
parent
43c8a30d15
commit
678eb55f5d
1
Makefile
1
Makefile
|
@ -852,6 +852,7 @@ TEST_BUILTINS_OBJS += test-submodule-nested-repo-config.o
|
|||
TEST_BUILTINS_OBJS += test-submodule.o
|
||||
TEST_BUILTINS_OBJS += test-subprocess.o
|
||||
TEST_BUILTINS_OBJS += test-trace2.o
|
||||
TEST_BUILTINS_OBJS += test-truncate.o
|
||||
TEST_BUILTINS_OBJS += test-urlmatch-normalization.o
|
||||
TEST_BUILTINS_OBJS += test-userdiff.o
|
||||
TEST_BUILTINS_OBJS += test-wildmatch.o
|
||||
|
|
|
@ -86,6 +86,7 @@ static struct test_cmd cmds[] = {
|
|||
{ "submodule-nested-repo-config", cmd__submodule_nested_repo_config },
|
||||
{ "subprocess", cmd__subprocess },
|
||||
{ "trace2", cmd__trace2 },
|
||||
{ "truncate", cmd__truncate },
|
||||
{ "userdiff", cmd__userdiff },
|
||||
{ "urlmatch-normalization", cmd__urlmatch_normalization },
|
||||
{ "xml-encode", cmd__xml_encode },
|
||||
|
|
|
@ -79,6 +79,7 @@ int cmd__submodule_config(int argc, const char **argv);
|
|||
int cmd__submodule_nested_repo_config(int argc, const char **argv);
|
||||
int cmd__subprocess(int argc, const char **argv);
|
||||
int cmd__trace2(int argc, const char **argv);
|
||||
int cmd__truncate(int argc, const char **argv);
|
||||
int cmd__userdiff(int argc, const char **argv);
|
||||
int cmd__urlmatch_normalization(int argc, const char **argv);
|
||||
int cmd__xml_encode(int argc, const char **argv);
|
||||
|
|
|
@ -0,0 +1,25 @@
|
|||
#include "test-tool.h"
|
||||
#include "git-compat-util.h"
|
||||
|
||||
/*
|
||||
* Truncate a file to the given size.
|
||||
*/
|
||||
int cmd__truncate(int argc, const char **argv)
|
||||
{
|
||||
char *p = NULL;
|
||||
uintmax_t sz = 0;
|
||||
int fd = -1;
|
||||
|
||||
if (argc != 3)
|
||||
die("expected filename and size");
|
||||
|
||||
sz = strtoumax(argv[2], &p, 0);
|
||||
if (*p)
|
||||
die("invalid size");
|
||||
|
||||
fd = xopen(argv[1], O_WRONLY | O_CREAT, 0600);
|
||||
|
||||
if (ftruncate(fd, (off_t) sz) < 0)
|
||||
die_errno("failed to truncate file");
|
||||
return 0;
|
||||
}
|
Loading…
Reference in New Issue