int rc;
struct flock lock_data;
BOOL read_only = flags == O_RDONLY;
-uschar dirname[256], filename[256];
+uschar * dirname, * filename;
/* The first thing to do is to open a separate file on which to lock. This
ensures that Exim has exclusive use of the database before it even tries to
open it. If there is a database, there should be a lock file in existence. */
-snprintf(CS dirname, sizeof(dirname), "%s/db", spool_directory);
-snprintf(CS filename, sizeof(filename), "%s/%.200s.lockfile", dirname, name);
+#ifdef COMPILE_UTILITY
+if ( asprintf(CSS &dirname, "%s/db", spool_directory) < 0
+ || asprintf(CSS &filename, "%s/%s.lockfile", dirname, name) < 0)
+ return NULL;
+#else
+dirname = string_sprintf("%s/db", spool_directory);
+filename = string_sprintf("%s/%s.lockfile", dirname, name);
+#endif
dbblock->lockfd = Uopen(filename, flags, 0);
if (dbblock->lockfd < 0)
/* Now we must get a lock on the opened lock file; do this with a blocking
lock that times out. */
-lock_data.l_type = read_only? F_RDLCK : F_WRLCK;
+lock_data.l_type = read_only ? F_RDLCK : F_WRLCK;
lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0;
sigalrm_seen = FALSE;
os_non_restarting_signal(SIGALRM, sigalrm_handler);
-alarm(EXIMDB_LOCK_TIMEOUT);
+ALARM(EXIMDB_LOCK_TIMEOUT);
rc = fcntl(dbblock->lockfd, F_SETLKW, &lock_data);
-alarm(0);
+ALARM_CLR(0);
if (sigalrm_seen) errno = ETIMEDOUT;
if (rc < 0)
/* At this point we have an opened and locked separate lock file, that is,
exclusive access to the database, so we can go ahead and open it. */
-sprintf(CS filename, "%s/%s", dirname, name);
+#ifdef COMPILE_UTILITY
+if (asprintf(CSS &filename, "%s/%s", dirname, name) < 0) return NULL;
+#else
+filename = string_sprintf("%s/%s", dirname, name);
+#endif
EXIM_DBOPEN(filename, dirname, flags, 0, &(dbblock->dbptr));
-if (dbblock->dbptr == NULL)
+if (!dbblock->dbptr)
{
printf("** Failed to open DBM file %s for %s:\n %s%s\n", filename,
read_only? "reading" : "writing", strerror(errno),