/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
+#define MAXREFLEN (1024)
+
+static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
+{
+ FILE *f;
+ struct cached_refs refs;
+ struct ref_list *ref;
+ int retval;
+
+ strcpy(name + pathlen, "packed-refs");
+ f = fopen(name, "r");
+ if (!f)
+ return -1;
+ read_packed_refs(f, &refs);
+ fclose(f);
+ ref = refs.packed;
+ retval = -1;
+ while (ref) {
+ if (!strcmp(ref->name, refname)) {
+ retval = 0;
+ memcpy(result, ref->sha1, 20);
+ break;
+ }
+ ref = ref->next;
+ }
+ free_ref_list(refs.packed);
+ return retval;
+}
+
+static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion)
+{
+ int fd, len = strlen(refname);
+ char buffer[128], *p;
+
+ if (recursion > MAXDEPTH || len > MAXREFLEN)
+ return -1;
+ memcpy(name + pathlen, refname, len+1);
+ fd = open(name, O_RDONLY);
+ if (fd < 0)
+ return resolve_gitlink_packed_ref(name, pathlen, refname, result);
+
+ len = read(fd, buffer, sizeof(buffer)-1);
+ close(fd);
+ if (len < 0)
+ return -1;
+ while (len && isspace(buffer[len-1]))
+ len--;
+ buffer[len] = 0;
+
+ /* Was it a detached head or an old-fashioned symlink? */
+ if (!get_sha1_hex(buffer, result))
+ return 0;
+
+ /* Symref? */
+ if (strncmp(buffer, "ref:", 4))
+ return -1;
+ p = buffer + 4;
+ while (isspace(*p))
+ p++;
+
+ return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1);
+}
+
+int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result)
+{
+ int len = strlen(path), retval;
+ char *gitdir;
+
+ while (len && path[len-1] == '/')
+ len--;
+ if (!len)
+ return -1;
+ gitdir = xmalloc(len + MAXREFLEN + 8);
+ memcpy(gitdir, path, len);
+ memcpy(gitdir + len, "/.git/", 7);
+
+ retval = resolve_gitlink_ref_recursive(gitdir, len+6, refname, result, 0);
+ free(gitdir);
+ return retval;
+}
const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
{
goto rollback;
}
- if (!strncmp(oldref, "refs/heads/", 11) &&
- !strncmp(newref, "refs/heads/", 11)) {
- char oldsection[1024], newsection[1024];
-
- snprintf(oldsection, 1024, "branch.%s", oldref + 11);
- snprintf(newsection, 1024, "branch.%s", newref + 11);
- if (git_config_rename_section(oldsection, newsection) < 0)
- return 1;
- }
-
return 0;
rollback:
log_file = git_path("logs/%s", ref_name);
if (log_all_ref_updates &&
- (!strncmp(ref_name, "refs/heads/", 11) ||
- !strncmp(ref_name, "refs/remotes/", 13) ||
+ (!prefixcmp(ref_name, "refs/heads/") ||
+ !prefixcmp(ref_name, "refs/remotes/") ||
!strcmp(ref_name, "HEAD"))) {
if (safe_create_leading_directories(log_file) < 0)
return error("unable to create directory for %s",
log_file, strerror(errno));
}
+ adjust_shared_perm(log_file);
+
msglen = 0;
if (msg) {
/* clean up the message and make sure it is a single line */
unlock_ref(lock);
return -1;
}
+ if (strcmp(lock->orig_ref_name, "HEAD") != 0) {
+ /*
+ * Special hack: If a branch is updated directly and HEAD
+ * points to it (may happen on the remote side of a push
+ * for example) then logically the HEAD reflog should be
+ * updated too.
+ * A generic solution implies reverse symref information,
+ * but finding all symrefs pointing to the given branch
+ * would be rather costly for this rare event (the direct
+ * update of a branch) to be worth it. So let's cheat and
+ * check with HEAD only which should cover 99% of all usage
+ * scenarios (even 100% of the default ones).
+ */
+ unsigned char head_sha1[20];
+ int head_flag;
+ const char *head_ref;
+ head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag);
+ if (head_ref && (head_flag & REF_ISSYMREF) &&
+ !strcmp(head_ref, lock->ref_name))
+ log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
+ }
if (commit_lock_file(lock->lk)) {
error("Couldn't set %s", lock->ref_name);
unlock_ref(lock);
return -1;
}
+#ifndef NO_SYMLINK_HEAD
done:
+#endif
if (logmsg && !read_ref(refs_heads_master, new_sha1))
log_ref_write(ref_target, old_sha1, new_sha1, logmsg);
unsigned long date;
unsigned char logged_sha1[20];
void *log_mapped;
+ size_t mapsz;
logfile = git_path("logs/%s", ref);
logfd = open(logfile, O_RDONLY, 0);
fstat(logfd, &st);
if (!st.st_size)
die("Log %s is empty.", logfile);
- log_mapped = xmmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, logfd, 0);
+ mapsz = xsize_t(st.st_size);
+ log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0);
logdata = log_mapped;
close(logfd);
logfile, show_rfc2822_date(date, tz));
}
}
- munmap(log_mapped, st.st_size);
+ munmap(log_mapped, mapsz);
return 0;
}
lastrec = rec;
die("Log %s is corrupt.", logfile);
if (msg)
*msg = ref_msg(logdata, logend);
- munmap(log_mapped, st.st_size);
+ munmap(log_mapped, mapsz);
if (cutoff_time)
*cutoff_time = date;