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odb_pack_keep(): stop generating keepfile name

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The odb_pack_keep() function generates the name of a .keep
file and opens it. This has two problems:

  1. It requires a fixed-size buffer to create the filename
     and doesn't notice when the result is truncated.

  2. Of the two callers, one sometimes wants to open a
     filename it already has, which makes things awkward (it
     has to do so manually, and skips the leading-directory
     creation).

Instead, let's have odb_pack_keep() just open the file.
Generating the name isn't hard, and a future patch will
switch callers over to odb_pack_name() anyway.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2017-03-16 10:27:12 -04:00 committed by Junio C Hamano
parent 1cec8c634f
commit eaeefc3276
4 changed files with 12 additions and 12 deletions
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6
builtin/index-pack.c
View File

@ -1402,10 +1402,10 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
int keep_fd, keep_msg_len = strlen(keep_msg);
if (!keep_name)
keep_fd = odb_pack_keep(name, sizeof(name), sha1);
else
keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600);
snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
get_object_directory(), sha1_to_hex(sha1));
keep_fd = odb_pack_keep(keep_name ? keep_name : name);
if (keep_fd < 0) {
if (errno != EEXIST)
die_errno(_("cannot write keep file '%s'"),

8
cache.h
View File

@ -1578,11 +1578,11 @@ extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
extern char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext);
/*
* Create a pack .keep file in the object database's pack directory, for
* a pack with checksum "sha1". The return value is a file descriptor opened
* for writing, or -1 on error. The name of the keep file is written to "name".
* Create a pack .keep file named "name" (which should generally be the output
* of odb_pack_name). Returns a file descriptor opened for writing, or -1 on
* error.
*/
extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
extern int odb_pack_keep(const char *name);
/*
* mmap the index file for the specified packfile (if it is not

6
environment.c
View File

@ -296,18 +296,16 @@ int odb_mkstemp(char *template, size_t limit, const char *pattern)
return xmkstemp_mode(template, mode);
}
int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
int odb_pack_keep(const char *name)
{
int fd;
snprintf(name, namesz, "%s/pack/pack-%s.keep",
get_object_directory(), sha1_to_hex(sha1));
fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
if (0 <= fd)
return fd;
/* slow path */
safe_create_leading_directories(name);
safe_create_leading_directories_const(name);
return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
}

4
fast-import.c
View File

@ -944,7 +944,9 @@ static char *keep_pack(const char *curr_index_name)
static const char *keep_msg = "fast-import";
int keep_fd;
keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1);
snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
get_object_directory(), sha1_to_hex(pack_data->sha1));
keep_fd = odb_pack_keep(name);
if (keep_fd < 0)
die_errno("cannot create keep file");
write_or_die(keep_fd, keep_msg, strlen(keep_msg));