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[PATCH v7 11/38] cache.h: define constants LOCK_SUFFIX and LOCK_SUFFIX_LEN

From
Michael Haggerty <mhagger@alum.mit.edu>
Date
Oct 1, 2014, 10:28 UTC
Message-ID
<1412159322-2622-12-git-send-email-mhagger@alum.mit.edu>
In-Reply-To
<1412159322-2622-1-git-send-email-mhagger@alum.mit.edu>

There are a few places that use these values, so define constants for them.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
 cache.h    |  4 ++++
 lockfile.c | 11 ++++++-----
 refs.c     |  7 ++++---
 3 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/cache.h b/cache.h
index 0a76d02..24891a8 100644
--- a/cache.h
+++ b/cache.h
@@ -570,6 +570,10 @@ extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 #define REFRESH_IN_PORCELAIN	0x0020	/* user friendly output, not "needs update" */
 extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
 
+/* String appended to a filename to derive the lockfile name: */
+#define LOCK_SUFFIX ".lock"
+#define LOCK_SUFFIX_LEN 5
+
 struct lock_file {
 	struct lock_file *next;
 	int fd;
diff --git a/lockfile.c b/lockfile.c
index 2680dc9..23847fc 100644
--- a/lockfile.c
+++ b/lockfile.c
@@ -166,10 +166,11 @@ static char *resolve_symlink(char *p, size_t s)
 static int lock_file(struct lock_file *lk, const char *path, int flags)
 {
 	/*
-	 * subtract 5 from size to make sure there's room for adding
-	 * ".lock" for the lock file name
+	 * subtract LOCK_SUFFIX_LEN from size to make sure there's
+	 * room for adding ".lock" for the lock file name:
 	 */
-	static const size_t max_path_len = sizeof(lk->filename) - 5;
+	static const size_t max_path_len = sizeof(lk->filename) -
+					   LOCK_SUFFIX_LEN;
 
 	if (!lock_file_list) {
 		/* One-time initialization */
@@ -194,7 +195,7 @@ static int lock_file(struct lock_file *lk, const char *path, int flags)
 	strcpy(lk->filename, path);
 	if (!(flags & LOCK_NODEREF))
 		resolve_symlink(lk->filename, max_path_len);
-	strcat(lk->filename, ".lock");
+	strcat(lk->filename, LOCK_SUFFIX);
 	lk->fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
 	if (0 <= lk->fd) {
 		lk->owner = getpid();
@@ -308,7 +309,7 @@ int commit_lock_file(struct lock_file *lk)
 	if (close_lock_file(lk))
 		return -1;
 	strcpy(result_file, lk->filename);
-	i = strlen(result_file) - 5; /* .lock */
+	i = strlen(result_file) - LOCK_SUFFIX_LEN; /* .lock */
 	result_file[i] = 0;
 	if (rename(lk->filename, result_file))
 		return -1;
diff --git a/refs.c b/refs.c
index 0e32477..73d6bae 100644
--- a/refs.c
+++ b/refs.c
@@ -79,7 +79,8 @@ out:
 		if (refname[1] == '\0')
 			return -1; /* Component equals ".". */
 	}
-	if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5))
+	if (cp - refname >= LOCK_SUFFIX_LEN &&
+	    !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN))
 		return -1; /* Refname ends with ".lock". */
 	return cp - refname;
 }
@@ -2602,11 +2603,11 @@ static int delete_ref_loose(struct ref_lock *lock, int flag)
 {
 	if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) {
 		/* loose */
-		int err, i = strlen(lock->lk->filename) - 5; /* .lock */
+		int err, i = strlen(lock->lk->filename) - LOCK_SUFFIX_LEN;
 
 		lock->lk->filename[i] = 0;
 		err = unlink_or_warn(lock->lk->filename);
-		lock->lk->filename[i] = '.';
+		lock->lk->filename[i] = LOCK_SUFFIX[0];
 		if (err && errno != ENOENT)
 			return 1;
 	}

-- 
2.1.0
Previous: Michael HaggertyNext: Michael Haggerty
Message 15 of 43 in “Lockfile correctness and refactoring”
  1. 00/38 Lockfile correctness and refactoringMichael Haggerty, Oct 1, 2014
  2. 01/38 unable_to_lock_die(): rename function from unable_to_lock_index_die()Michael Haggerty, Oct 1, 2014
  3. 02/38 api-lockfile: revise and expand the documentationMichael Haggerty, Oct 1, 2014
  4. 03/38 close_lock_file(): exit (successfully) if file is already closedMichael Haggerty, Oct 1, 2014
  5. 04/38 rollback_lock_file(): do not clear filename redundantlyMichael Haggerty, Oct 1, 2014
  6. 05/38 rollback_lock_file(): exit early if lock is not activeMichael Haggerty, Oct 1, 2014
  7. 06/38 rollback_lock_file(): set fd to -1Michael Haggerty, Oct 1, 2014
  8. 07/38 lockfile: unlock file if lockfile permissions cannot be adjustedMichael Haggerty, Oct 1, 2014
  9. 08/38 hold_lock_file_for_append(): release lock on errorsMichael Haggerty, Oct 1, 2014
  10. 09/38 lock_file(): always initialize and register lock_file objectMichael Haggerty, Oct 1, 2014
  11. René ScharfeOct 1, 2014
  12. Michael HaggertyOct 1, 2014
  13. Junio C HamanoOct 1, 2014
  14. 10/38 lockfile.c: document the various states of lock_file objectsMichael Haggerty, Oct 1, 2014
  15. 11/38 cache.h: define constants LOCK_SUFFIX and LOCK_SUFFIX_LENMichael Haggerty, Oct 1, 2014
  16. 12/38 delete_ref_loose(): don't muck around in the lock_file's filenameMichael Haggerty, Oct 1, 2014
  17. 13/38 prepare_index(): declare return value to be (const char *)Michael Haggerty, Oct 1, 2014
  18. 14/38 lock_file(): exit early if lockfile cannot be openedMichael Haggerty, Oct 1, 2014
  19. 15/38 remove_lock_file(): call rollback_lock_file()Michael Haggerty, Oct 1, 2014
  20. 16/38 commit_lock_file(): inline temporary variableMichael Haggerty, Oct 1, 2014
  21. 17/38 commit_lock_file(): die() if called for unlocked lockfile objectMichael Haggerty, Oct 1, 2014
  22. 18/38 close_lock_file(): if close fails, roll backMichael Haggerty, Oct 1, 2014
  23. 19/38 commit_lock_file(): rollback lock file on failure to renameMichael Haggerty, Oct 1, 2014
  24. 20/38 api-lockfile: document edge casesMichael Haggerty, Oct 1, 2014
  25. 21/38 dump_marks(): remove a redundant call to rollback_lock_file()Michael Haggerty, Oct 1, 2014
  26. 22/38 git_config_set_multivar_in_file(): avoid call to rollback_lock_file()Michael Haggerty, Oct 1, 2014
  27. 23/38 lockfile: avoid transitory invalid statesMichael Haggerty, Oct 1, 2014
  28. 24/38 struct lock_file: declare some fields volatileMichael Haggerty, Oct 1, 2014
  29. 25/38 try_merge_strategy(): remove redundant lock_file allocationMichael Haggerty, Oct 1, 2014
  30. 26/38 try_merge_strategy(): use a statically-allocated lock_file objectMichael Haggerty, Oct 1, 2014
  31. 27/38 commit_lock_file(): use a strbuf to manage temporary spaceMichael Haggerty, Oct 1, 2014
  32. 28/38 Change lock_file::filename into a strbufMichael Haggerty, Oct 1, 2014
  33. 29/38 resolve_symlink(): use a strbuf for internal scratch spaceMichael Haggerty, Oct 1, 2014
  34. 30/38 resolve_symlink(): take a strbuf parameterMichael Haggerty, Oct 1, 2014
  35. 31/38 trim_last_path_component(): replace last_path_elm()Michael Haggerty, Oct 1, 2014
  36. 32/38 Extract a function commit_lock_file_to()Michael Haggerty, Oct 1, 2014
  37. 33/38 Rename LOCK_NODEREF to LOCK_NO_DEREFMichael Haggerty, Oct 1, 2014
  38. 34/38 lockfile.c: rename static functionsMichael Haggerty, Oct 1, 2014
  39. 35/38 get_locked_file_path(): new functionMichael Haggerty, Oct 1, 2014
  40. 36/38 hold_lock_file_for_append(): restore errno before returningMichael Haggerty, Oct 1, 2014
  41. 37/38 Move read_index() definition to read-cache.cMichael Haggerty, Oct 1, 2014
  42. 38/38 lockfile.h: extract new header file for the functions in lockfile.cMichael Haggerty, Oct 1, 2014
  43. Junio C HamanoOct 1, 2014

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