debian/notmuch
1
0
Fork 0
mirror of https://git.notmuchmail.org/git/notmuch synced 2024-11-25 20:38:08 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

compact: preserve backup database until compacted database is in place

Browse source 
It is less error prone and window of failure opportunity is smaller
if the old (backup) database is always renamed (instead of sometimes
rmtree'd) before new (compacted) database is put into its place.
Finally rmtree() old database in case old database backup is not kept.
This commit is contained in:
Tomi Ollila 2013-11-15 00:03:25 +02:00 committed by David Bremner
parent 19a89753ca
commit cb6cc296e2
1 changed files with 27 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
lib/database.cc
View file

@ -873,6 +873,7 @@ notmuch_database_compact (const char *path,
notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
notmuch_database_t *notmuch = NULL;
struct stat statbuf;
notmuch_bool_t keep_backup;
local = talloc_new (NULL);
if (! local)
@ -898,17 +899,27 @@ notmuch_database_compact (const char *path,
goto DONE;
}
if (backup_path != NULL) {
if (stat (backup_path, &statbuf) != -1) {
fprintf (stderr, "Backup path already exists: %s\n", backup_path);
ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
if (errno != ENOENT) {
fprintf (stderr, "Unknown error while stat()ing backup path: %s\n",
strerror (errno));
if (backup_path == NULL) {
if (! (backup_path = talloc_asprintf (local, "%s.old", xapian_path))) {
ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
goto DONE;
}
keep_backup = FALSE;
}
else {
keep_backup = TRUE;
}
if (stat (backup_path, &statbuf) != -1) {
fprintf (stderr, "Path already exists: %s\n", backup_path);
ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
if (errno != ENOENT) {
fprintf (stderr, "Unknown error while stat()ing path: %s\n",
strerror (errno));
ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
try {
@ -924,14 +935,10 @@ notmuch_database_compact (const char *path,
goto DONE;
}
if (backup_path) {
if (rename (xapian_path, backup_path)) {
fprintf (stderr, "Error moving old database out of the way\n");
ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
} else {
rmtree (xapian_path);
if (rename (xapian_path, backup_path)) {
fprintf (stderr, "Error moving old database out of the way\n");
ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
if (rename (compact_xapian_path, xapian_path)) {
@ -940,6 +947,9 @@ notmuch_database_compact (const char *path,
goto DONE;
}
if (! keep_backup)
rmtree (backup_path);
DONE:
if (notmuch)
notmuch_database_destroy (notmuch);