diff options
Diffstat (limited to 'mandocdb.c')
| -rw-r--r-- | mandocdb.c | 24 |
1 files changed, 23 insertions, 1 deletions
@@ -1,4 +1,4 @@ -/* $Id: mandocdb.c,v 1.249 2017/05/05 15:17:32 schwarze Exp $ */ +/* $Id: mandocdb.c,v 1.250 2017/05/17 22:27:12 schwarze Exp $ */ /* * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv> * Copyright (c) 2011-2017 Ingo Schwarze <schwarze@openbsd.org> @@ -2122,6 +2122,23 @@ dbwrite(struct dba *dba) int status; pid_t child; + /* + * Do not write empty databases, and delete existing ones + * when makewhatis -u causes them to become empty. + */ + + dba_array_start(dba->pages); + if (dba_array_next(dba->pages) == NULL) { + if (unlink(MANDOC_DB) == -1) + say(MANDOC_DB, "&unlink"); + return; + } + + /* + * Build the database in a temporary file, + * then atomically move it into place. + */ + if (dba_write(MANDOC_DB "~", dba) != -1) { if (rename(MANDOC_DB "~", MANDOC_DB) == -1) { exitcode = (int)MANDOCLEVEL_SYSERR; @@ -2131,6 +2148,11 @@ dbwrite(struct dba *dba) return; } + /* + * We lack write permission and cannot replace the database + * file, but let's at least check whether the data changed. + */ + (void)strlcpy(tfn, "/tmp/mandocdb.XXXXXXXX", sizeof(tfn)); if (mkdtemp(tfn) == NULL) { exitcode = (int)MANDOCLEVEL_SYSERR; |