-/* $Cambridge: exim/src/src/dbfn.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2004 */
+/* Copyright (c) The Exim Maintainers 2020 - 2024 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "exim.h"
+/* We have buffers holding path names for database files.
+PATH_MAX could be used here, but would be wasting memory, as we deal
+with database files like $spooldirectory/db/<name> */
+#define PATHLEN 256
+
/* Functions for accessing Exim's hints database, which consists of a number of
different DBM files. This module does not contain code for reading DBM files
for (e.g.) alias expansion. That is all contained within the general search
functions. As Exim now has support for several DBM interfaces, all the relevant
-functions are called as macros.
+functions are called as inlinable functions from an included file.
All the data in Exim's database is in the nature of *hints*. Therefore it
doesn't matter if it gets destroyed by accident. These functions are not
DBM files themselves were never completely successful.) Since callers may in
general want to do more than one read or write while holding the lock, there
are separate open and close functions. However, the calling modules should
-arrange to hold the locks for the bare minimum of time. */
+arrange to hold the locks for the bare minimum of time.
+
+API:
+ exim_lockfile_needed facilities predicate
+ dbfn_open_path full pathname; no lock taken, readonly
+ dbfn_open takes lockfile or opens transaction
+ dbfn_open_multi only if transactions supported;
+ no lock or transaction taken
+ dbfn_close release lockfile or transaction
+ dbfn_close_multi
+ dbfn_transaction_start only if transactions supported
+ dbfn_transaction_commit
+ dbfn_read_klen explicit key length; embedded NUL ok
+ dbfn_read_with_length
+ dbfn_read_enforce_length
+ dbfn_write
+ dbfn_delete
+ dbfn_scan unused; ifdeffout out
+
+Users:
+ ACL ratelimit & seen conditions
+ delivery retry handling
+ delivery serialization
+ TLS session resumption
+ peer capability cache
+ callout & quota cache
+ DBM lookup type
+*/
/*************************************************
-* Berkeley DB error callback *
+* Open and lock a database file *
*************************************************/
-/* For Berkeley DB >= 2, we can define a function to be called in case of DB
-errors. This should help with debugging strange DB problems, e.g. getting "File
-exists" when you try to open a db file. */
+/* Used by DBM lookups:
+full pathname for DB file rather than hintsdb name, readonly, no locking. */
-#if defined(USE_DB) && defined(DB_VERSION_STRING)
-void
-dbfn_bdb_error_callback(const char *pfx, char *msg)
+open_db *
+dbfn_open_path(const uschar * path, open_db * dbblock)
{
-pfx = pfx;
-log_write(0, LOG_MAIN, "Berkeley DB error: %s", msg);
+uschar * dirname = string_copy(path);
+
+dbblock->readonly = TRUE;
+dbblock->lockfd = -1;
+dbblock->dbptr = !exim_lockfile_needed()
+ ? exim_dbopen_multi(path, dirname, O_RDONLY, 0)
+ : exim_dbopen(path, dirname, O_RDONLY, 0);
+return dbblock->dbptr ? dbblock : NULL;;
}
-#endif
+/* Ensure the directory for the DB is present */
+static inline void
+db_dir_make(BOOL panic)
+{
+(void) directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, panic);
+}
-/*************************************************
-* Open and lock a database file *
-*************************************************/
+/* Lock a file to protect the DB. Return TRUE for success */
+
+static inline BOOL
+lockfile_take(open_db * dbblock, const uschar * filename, BOOL rdonly, BOOL panic)
+{
+flock_t lock_data;
+int rc, * fdp = &dbblock->lockfd;
+
+priv_drop_temp(exim_uid, exim_gid);
+if ((*fdp = Uopen(filename, O_RDWR, EXIMDB_LOCKFILE_MODE)) < 0)
+ {
+ db_dir_make(panic);
+ *fdp = Uopen(filename, O_RDWR|O_CREAT, EXIMDB_LOCKFILE_MODE);
+ }
+priv_restore();
+
+if (*fdp < 0)
+ {
+ log_write(0, LOG_MAIN, "%s",
+ string_open_failed("database lock file %s", filename));
+ errno = 0; /* Indicates locking failure */
+ return FALSE;
+ }
+
+/* Now we must get a lock on the opened lock file; do this with a blocking
+lock that times out. */
+
+lock_data.l_type = rdonly ? F_RDLCK : F_WRLCK;
+lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0;
+
+DEBUG(D_hints_lookup|D_retry|D_route|D_deliver)
+ debug_printf_indent("locking %s\n", filename);
+
+sigalrm_seen = FALSE;
+ALARM(EXIMDB_LOCK_TIMEOUT);
+rc = fcntl(*fdp, F_SETLKW, &lock_data);
+ALARM_CLR(0);
+
+if (sigalrm_seen) errno = ETIMEDOUT;
+if (rc < 0)
+ {
+ log_write(0, LOG_MAIN|LOG_PANIC, "Failed to get %s lock for %s: %s",
+ rdonly ? "read" : "write", filename,
+ errno == ETIMEDOUT ? "timed out" : strerror(errno));
+ (void)close(*fdp); *fdp = -1;
+ errno = 0; /* Indicates locking failure */
+ return FALSE;
+ }
+
+DEBUG(D_hints_lookup) debug_printf_indent("locked %s\n", filename);
+return TRUE;
+}
/* Used for accessing Exim's hints databases.
Arguments:
name The single-component name of one of Exim's database files.
flags Either O_RDONLY or O_RDWR, indicating the type of open required;
- O_RDWR implies "create if necessary"
+ optionally O_CREAT
dbblock Points to an open_db block to be filled in.
lof If TRUE, write to the log for actual open failures (locking failures
are always logged).
+ panic If TRUE, panic on failure to create the db directory
Returns: NULL if the open failed, or the locking failed. After locking
failures, errno is zero.
*/
open_db *
-dbfn_open(uschar *name, int flags, open_db *dbblock, BOOL lof)
+dbfn_open(const uschar * name, int flags, open_db * dbblock,
+ BOOL lof, BOOL panic)
{
-int rc, save_errno;
-BOOL read_only = flags == O_RDONLY;
-BOOL created = FALSE;
+int rc, save_errno, dlen, flen;
flock_t lock_data;
-uschar buffer[256];
+uschar dirname[PATHLEN], filename[PATHLEN];
+
+DEBUG(D_hints_lookup) acl_level++;
/* 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
unnecessarily, because usually the lock file will be there. If the directory
exists, there is no error. */
-sprintf(CS buffer, "%s/db/%s.lockfile", spool_directory, name);
+dlen = snprintf(CS dirname, sizeof(dirname), "%s/db", spool_directory);
-if ((dbblock->lockfd = Uopen(buffer, O_RDWR, EXIMDB_LOCKFILE_MODE)) < 0)
+dbblock->readonly = (flags & O_ACCMODE) == O_RDONLY;
+dbblock->lockfd = -1;
+if (!exim_lockfile_needed())
+ db_dir_make(panic);
+else
{
- created = TRUE;
- (void)directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, TRUE);
- dbblock->lockfd = Uopen(buffer, O_RDWR|O_CREAT, EXIMDB_LOCKFILE_MODE);
+ flen = Ustrlen(name);
+ snprintf(CS filename, sizeof(filename), "%.*s/%.*s.lockfile",
+ (int)sizeof(filename) - dlen - flen - 11, dirname,
+ flen, name);
+ if (!lockfile_take(dbblock, filename, flags == O_RDONLY, panic))
+ {
+ DEBUG(D_hints_lookup) acl_level--;
+ return NULL;
+ }
}
-if (dbblock->lockfd < 0)
- {
- log_write(0, LOG_MAIN, "%s",
- string_open_failed(errno, "database lock file %s", buffer));
- errno = 0; /* Indicates locking failure */
- return NULL;
- }
+/* 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. If we are
+expected to create it, don't do so at first, again so that we can detect
+whether we need to change its ownership (see comments about the lock file
+above.) There have been regular reports of crashes while opening hints
+databases - often this is caused by non-matching db.h and the library. To make
+it easy to pin this down, there are now debug statements on either side of the
+open call. */
-/* Now we must get a lock on the opened lock file; do this with a blocking
-lock that times out. */
+snprintf(CS filename, sizeof(filename), "%.*s/%s", dlen, dirname, name);
-lock_data.l_type = read_only? F_RDLCK : F_WRLCK;
-lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0;
+priv_drop_temp(exim_uid, exim_gid);
+dbblock->dbptr = dbblock->readonly && !exim_lockfile_needed()
+ ? exim_dbopen_multi(filename, dirname, flags & O_ACCMODE, EXIMDB_MODE)
+ : exim_dbopen(filename, dirname, flags & O_ACCMODE, EXIMDB_MODE);
-DEBUG(D_hints_lookup|D_retry|D_route|D_deliver)
- debug_printf("locking %s\n", buffer);
+if (!dbblock->dbptr && errno == ENOENT && flags & O_CREAT)
+ {
+ DEBUG(D_hints_lookup)
+ debug_printf_indent("%s appears not to exist: trying to create\n", filename);
+ dbblock->dbptr = exim_dbopen(filename, dirname, flags, EXIMDB_MODE);
+ }
+save_errno = errno;
+priv_restore();
-sigalrm_seen = FALSE;
-alarm(EXIMDB_LOCK_TIMEOUT);
-rc = fcntl(dbblock->lockfd, F_SETLKW, &lock_data);
-alarm(0);
+/* If the open has failed, return NULL, leaving errno set. If lof is TRUE,
+log the event - also for debugging - but debug only if the file just doesn't
+exist. */
-if (sigalrm_seen) errno = ETIMEDOUT;
-if (rc < 0)
+if (!dbblock->dbptr)
{
- log_write(0, LOG_MAIN, "Failed to get %s lock for %s: %s",
- ((flags & O_RDONLY) != 0)? "read" : "write", buffer,
- (errno == ETIMEDOUT)? "timed out" : strerror(errno));
- close(dbblock->lockfd);
- errno = 0; /* Indicates locking failure */
- return NULL;
+ errno = save_errno;
+ if (lof && save_errno != ENOENT)
+ log_write(0, LOG_MAIN, "%s", string_open_failed("DB file %s",
+ filename));
+ else
+ DEBUG(D_hints_lookup)
+ debug_printf_indent("%s\n", CS string_open_failed("DB file %s",
+ filename));
+ (void)close(dbblock->lockfd);
+ dbblock->lockfd = -1;
+ dbblock = NULL;
}
-DEBUG(D_hints_lookup) debug_printf("locked %s\n", buffer);
+/* Pass back the block containing the opened database handle and the open fd
+for the lock. */
-/* 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. If we are
-expected to create it, don't do so at first, again so that we can detect
-whether we need to change its ownership (see comments about the lock file
-above.) */
+DEBUG(D_hints_lookup) acl_level--;
+return dbblock;
+}
-sprintf(CS buffer, "%s/db/%s", spool_directory, name);
-EXIM_DBOPEN(buffer, flags, EXIMDB_MODE, &(dbblock->dbptr));
-if (dbblock->dbptr == NULL && errno == ENOENT && flags == O_RDWR)
- {
- DEBUG(D_hints_lookup)
- debug_printf("%s appears not to exist: trying to create\n", buffer);
- created = TRUE;
- EXIM_DBOPEN(buffer, flags|O_CREAT, EXIMDB_MODE, &(dbblock->dbptr));
- }
-save_errno = errno;
+/* Only for transaction-capable DB types. Open without locking or
+starting a transaction. "lof" and "panic" always true; read/write mode.
+*/
-/* If we are running as root and this is the first access to the database, its
-files will be owned by root. We want them to be owned by exim. We detect this
-situation by noting above when we had to create the lock file or the database
-itself. Because the different dbm libraries use different extensions for their
-files, I don't know of any easier way of arranging this than scanning the
-directory for files with the appropriate base name. At least this deals with
-the lock file at the same time. Also, the directory will typically have only
-half a dozen files, so the scan will be quick.
-
-This code is placed here, before the test for successful opening, because there
-was a case when a file was created, but the DBM library still returned NULL
-because of some problem. It also sorts out the lock file if that was created
-but creation of the database file failed. */
-
-if (created && geteuid() == root_uid)
- {
- DIR *dd;
- struct dirent *ent;
- uschar *lastname = Ustrrchr(buffer, '/') + 1;
- int namelen = Ustrlen(name);
+open_db *
+dbfn_open_multi(const uschar * name, int flags, open_db * dbblock)
+{
+int rc, save_errno, dlen;
+flock_t lock_data;
+uschar dirname[PATHLEN], filename[PATHLEN];
- *lastname = 0;
- dd = opendir(CS buffer);
+DEBUG(D_hints_lookup) acl_level++;
- while ((ent = readdir(dd)) != NULL)
- {
- if (Ustrncmp(ent->d_name, name, namelen) == 0)
- {
- struct stat statbuf;
- Ustrcpy(lastname, ent->d_name);
- if (Ustat(buffer, &statbuf) >= 0 && statbuf.st_uid != exim_uid)
- {
- DEBUG(D_hints_lookup) debug_printf("ensuring %s is owned by exim\n", buffer);
- Uchown(buffer, exim_uid, exim_gid);
- }
- }
- }
+dbblock->lockfd = -1;
+dbblock->readonly = (flags & O_ACCMODE) == O_RDONLY;
+db_dir_make(TRUE);
+
+dlen = snprintf(CS dirname, sizeof(dirname), "%s/db", spool_directory);
+snprintf(CS filename, sizeof(filename), "%.*s/%s", dlen, dirname, name);
- closedir(dd);
+priv_drop_temp(exim_uid, exim_gid);
+dbblock->dbptr = exim_dbopen_multi(filename, dirname, flags & O_ACCMODE, EXIMDB_MODE);
+if (!dbblock->dbptr && errno == ENOENT && flags & O_CREAT)
+ {
+ DEBUG(D_hints_lookup)
+ debug_printf_indent("%s appears not to exist: trying to create\n", filename);
+ dbblock->dbptr = exim_dbopen_multi(filename, dirname, flags, EXIMDB_MODE);
}
+save_errno = errno;
+priv_restore();
/* If the open has failed, return NULL, leaving errno set. If lof is TRUE,
-log the event - also for debugging - but not if the file just doesn't exist. */
+log the event - also for debugging - but debug only if the file just doesn't
+exist. */
-if (dbblock->dbptr == NULL)
+if (!dbblock->dbptr)
{
- if (save_errno != ENOENT)
- {
- if (lof)
- log_write(0, LOG_MAIN, "%s", string_open_failed(save_errno, "DB file %s",
- buffer));
- else
- DEBUG(D_hints_lookup)
- debug_printf("%s", CS string_open_failed(save_errno, "DB file %s\n",
- buffer));
- }
- close(dbblock->lockfd);
errno = save_errno;
- return NULL;
+ if (save_errno != ENOENT)
+ log_write(0, LOG_MAIN, "%s", string_open_failed("DB file %s",
+ filename));
+ else
+ DEBUG(D_hints_lookup)
+ debug_printf_indent("%s\n", CS string_open_failed("DB file %s",
+ filename));
+ dbblock = NULL;
}
-DEBUG(D_hints_lookup)
- debug_printf("opened hints database %s: flags=%x\n", buffer, flags);
-
-/* Pass back the block containing the opened database handle and the open fd
-for the lock. */
-
+/* Pass back the block containing the opened database handle */
+DEBUG(D_hints_lookup) acl_level--;
return dbblock;
}
+/* Return: boolean success */
+BOOL
+dbfn_transaction_start(open_db * dbp)
+{
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_transaction_start\n");
+if (!dbp->readonly) return exim_dbtransaction_start(dbp->dbptr);
+return FALSE;
+}
+void
+dbfn_transaction_commit(open_db * dbp)
+{
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_transaction_commit\n");
+if (!dbp->readonly) exim_dbtransaction_commit(dbp->dbptr);
+}
+
/*************************************************
*************************************************/
/* Closing a file automatically unlocks it, so after closing the database, just
-close the lock file.
+close the lock file if there was one.
Argument: a pointer to an open database block
Returns: nothing
*/
void
-dbfn_close(open_db *dbblock)
+dbfn_close(open_db * dbp)
{
-EXIM_DBCLOSE(dbblock->dbptr);
-close(dbblock->lockfd);
+int * fdp = &dbp->lockfd;
+
+if (dbp->readonly && !exim_lockfile_needed())
+ exim_dbclose_multi(dbp->dbptr);
+else
+ exim_dbclose(dbp->dbptr);
+
+if (*fdp >= 0) (void)close(*fdp);
+DEBUG(D_hints_lookup)
+ debug_printf_indent("closed hints database%s\n",
+ *fdp < 0 ? "" : " and lockfile");
+*fdp = -1;
+}
+
+
+void
+dbfn_close_multi(open_db * dbp)
+{
+exim_dbclose_multi(dbp->dbptr);
+DEBUG(D_hints_lookup)
+ debug_printf_indent("closed hints database\n");
}
* Read from database file *
*************************************************/
-/* Passing back the pointer unchanged is useless, because there is
+/* Read, using a defined-length key (permitting embedded NULs).
+
+Passing back the pointer unchanged is useless, because there is
no guarantee of alignment. Since all the records used by Exim need
to be properly aligned to pick out the timestamps, etc., we might as
well do the copying centrally here.
-Most calls don't need the length, so there is a macro called dbfn_read which
-has two arguments; it calls this function adding NULL as the third.
-
Arguments:
dbblock a pointer to an open database block
key the key of the record to be read
+ klen length of key including a terminating NUL (if present)
length a pointer to an int into which to return the length, if not NULL
Returns: a pointer to the retrieved record, or
*/
void *
-dbfn_read_with_length(open_db *dbblock, uschar *key, int *length)
+dbfn_read_klen(open_db * dbblock, const uschar * key, int klen, int * length)
{
-void *yield;
+void * yield;
EXIM_DATUM key_datum, result_datum;
+uschar * key_copy = store_get(klen, key);
+unsigned dlen;
+
+memcpy(key_copy, key, klen);
-DEBUG(D_hints_lookup) debug_printf("dbfn_read: key=%s\n", key);
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_read: key=%.*s\n", klen, key);
+
+exim_datum_init(&key_datum); /* Some DBM libraries require the datum */
+exim_datum_init(&result_datum); /* to be cleared before use. */
+exim_datum_data_set(&key_datum, key_copy);
+exim_datum_size_set(&key_datum, klen);
+
+if (!exim_dbget(dbblock->dbptr, &key_datum, &result_datum))
+ {
+ DEBUG(D_hints_lookup) debug_printf_indent("dbfn_read: null return\n");
+ return NULL;
+ }
-EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */
-EXIM_DATUM_INIT(result_datum); /* to be cleared before use. */
-EXIM_DATUM_DATA(key_datum) = CS key;
-EXIM_DATUM_SIZE(key_datum) = Ustrlen(key) + 1;
+/* Assume the data store could have been tainted. Properly, we should
+store the taint status with the data. */
-if (!EXIM_DBGET(dbblock->dbptr, key_datum, result_datum)) return NULL;
+dlen = exim_datum_size_get(&result_datum);
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_read: size %u return\n", dlen);
-yield = store_get(EXIM_DATUM_SIZE(result_datum));
-memcpy(yield, EXIM_DATUM_DATA(result_datum), EXIM_DATUM_SIZE(result_datum));
-if (length != NULL) *length = EXIM_DATUM_SIZE(result_datum);
+yield = store_get(dlen+1, GET_TAINTED);
+memcpy(yield, exim_datum_data_get(&result_datum), dlen);
+((uschar *)yield)[dlen] = '\0';
+if (length) *length = dlen;
-EXIM_DATUM_FREE(result_datum); /* Some DBM libs require freeing */
+exim_datum_free(&result_datum); /* Some DBM libs require freeing */
return yield;
}
+/* Read, using a NUL-terminated key.
+
+Most calls don't need the length, so there is a macro called dbfn_read which
+has two arguments; it calls this function adding NULL as the third.
+
+Arguments:
+ dbblock a pointer to an open database block
+ key the key of the record to be read (NUL-terminated)
+ lenp a pointer to an int into which to return the data length,
+ if not NULL
+
+Returns: a pointer to the retrieved record, or
+ NULL if the record is not found
+*/
+
+void *
+dbfn_read_with_length(open_db * dbblock, const uschar * key, int * lenp)
+{
+return dbfn_read_klen(dbblock, key, Ustrlen(key)+1, lenp);
+}
+
+
+
+/* Read a record. If the length is not as expected then delete it, write
+an error log line, delete the record and return NULL.
+Use this for fixed-size records (so not retry or wait records).
+
+Arguments:
+ dbblock a pointer to an open database block
+ key the key of the record to be read
+ length the expected record length
+
+Returns: a pointer to the retrieved record, or
+ NULL if the record is not found/bad
+*/
+
+void *
+dbfn_read_enforce_length(open_db * dbblock, const uschar * key, size_t length)
+{
+int rlen;
+void * yield = dbfn_read_with_length(dbblock, key, &rlen);
+
+if (yield)
+ {
+ if (rlen == length) return yield;
+ log_write(0, LOG_MAIN|LOG_PANIC, "Bad db record size for '%s'", key);
+ dbfn_delete(dbblock, key);
+ }
+return NULL;
+}
/*************************************************
* Write to database file *
*/
int
-dbfn_write(open_db *dbblock, uschar *key, void *ptr, int length)
+dbfn_write(open_db *dbblock, const uschar *key, void *ptr, int length)
{
EXIM_DATUM key_datum, value_datum;
dbdata_generic *gptr = (dbdata_generic *)ptr;
-gptr->time_stamp = time(NULL);
+int klen = Ustrlen(key) + 1;
+uschar * key_copy = store_get(klen, key);
-DEBUG(D_hints_lookup) debug_printf("dbfn_write: key=%s\n", key);
+memcpy(key_copy, key, klen);
+gptr->time_stamp = time(NULL);
-EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */
-EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */
-EXIM_DATUM_DATA(key_datum) = CS key;
-EXIM_DATUM_SIZE(key_datum) = Ustrlen(key) + 1;
-EXIM_DATUM_DATA(value_datum) = CS ptr;
-EXIM_DATUM_SIZE(value_datum) = length;
-return EXIM_DBPUT(dbblock->dbptr, key_datum, value_datum);
+DEBUG(D_hints_lookup)
+ debug_printf_indent("dbfn_write: key=%s datalen %d\n", key, length);
+
+exim_datum_init(&key_datum); /* Some DBM libraries require the datum */
+exim_datum_init(&value_datum); /* to be cleared before use. */
+exim_datum_data_set(&key_datum, key_copy);
+exim_datum_size_set(&key_datum, klen);
+exim_datum_data_set(&value_datum, ptr);
+exim_datum_size_set(&value_datum, length);
+return exim_dbput(dbblock->dbptr, &key_datum, &value_datum);
}
*/
int
-dbfn_delete(open_db *dbblock, uschar *key)
+dbfn_delete(open_db *dbblock, const uschar *key)
{
+int klen = Ustrlen(key) + 1;
+uschar * key_copy = store_get(klen, key);
EXIM_DATUM key_datum;
-EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require clearing */
-EXIM_DATUM_DATA(key_datum) = CS key;
-EXIM_DATUM_SIZE(key_datum) = Ustrlen(key) + 1;
-return EXIM_DBDEL(dbblock->dbptr, key_datum);
+
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_delete: key=%s\n", key);
+
+memcpy(key_copy, key, klen);
+exim_datum_init(&key_datum); /* Some DBM libraries require clearing */
+exim_datum_data_set(&key_datum, key_copy);
+exim_datum_size_set(&key_datum, klen);
+return exim_dbdel(dbblock->dbptr, &key_datum);
}
+#ifdef notdef
+/* XXX This appears to be unused. There's a separate implementation
+in dbutils.c for dumpdb and fixdb, using the same underlying support.
+*/
+
/*************************************************
* Scan the keys of a database file *
*************************************************/
{
EXIM_DATUM key_datum, value_datum;
uschar *yield;
-value_datum = value_datum; /* dummy; not all db libraries use this */
+
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_scan\n");
/* Some dbm require an initialization */
-if (start) EXIM_DBCREATE_CURSOR(dbblock->dbptr, cursor);
+if (start) *cursor = exim_dbcreate_cursor(dbblock->dbptr);
-EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */
-EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */
+exim_datum_init(&key_datum); /* Some DBM libraries require the datum */
+exim_datum_init(&value_datum); /* to be cleared before use. */
-yield = (EXIM_DBSCAN(dbblock->dbptr, key_datum, value_datum, start, *cursor))?
- US EXIM_DATUM_DATA(key_datum) : NULL;
+yield = exim_dbscan(dbblock->dbptr, &key_datum, &value_datum, start, *cursor)
+ ? US exim_datum_data_get(&key_datum) : NULL;
/* Some dbm require a termination */
-if (!yield) EXIM_DBDELETE_CURSOR(*cursor);
+if (!yield) exim_dbdelete_cursor(*cursor);
return yield;
}
+#endif
{
count = Uatoi(cmd);
while (isdigit((uschar)*cmd)) cmd++;
- while (isspace((uschar)*cmd)) cmd++;
+ Uskip_whitespace(&cmd);
}
if (Ustrncmp(cmd, "open", 4) == 0)
int i;
open_db *odb;
uschar *s = cmd + 4;
- while (isspace((uschar)*s)) s++;
+ Uskip_whitespace(&s);
for (i = 0; i < max_db; i++)
if (dbblock[i].dbptr == NULL) break;
}
start = clock();
- odb = dbfn_open(s, O_RDWR, dbblock + i, TRUE);
+ odb = dbfn_open(s, O_RDWR|O_CREAT, dbblock + i, TRUE, TRUE);
stop = clock();
- if (odb != NULL)
+ if (odb)
{
current = i;
printf("opened %d\n", current);
else if (Ustrncmp(cmd, "write", 5) == 0)
{
int rc = 0;
- uschar *key = cmd + 5;
- uschar *data;
+ uschar * key = cmd + 5, * data;
if (current < 0)
{
continue;
}
- while (isspace((uschar)*key)) key++;
+ Uskip_whitespace(&key);
data = key;
- while (*data != 0 && !isspace((uschar)*data)) data++;
- *data++ = 0;
- while (isspace((uschar)*data)) data++;
+ Uskip_nonwhite(&data);
+ *data++ = '\0';
+ Uskip_whitespace(&data);
dbwait = (dbdata_wait *)(&structbuffer);
Ustrcpy(dbwait->text, data);
else if (Ustrncmp(cmd, "read", 4) == 0)
{
- uschar *key = cmd + 4;
+ uschar * key = cmd + 4;
if (current < 0)
{
printf("No current database\n");
continue;
}
- while (isspace((uschar)*key)) key++;
+ Uskip_whitespace(&key);
start = clock();
while (count-- > 0)
dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock+ current, key, NULL);
else if (Ustrncmp(cmd, "delete", 6) == 0)
{
- uschar *key = cmd + 6;
+ uschar * key = cmd + 6;
if (current < 0)
{
printf("No current database\n");
continue;
}
- while (isspace((uschar)*key)) key++;
+ Uskip_whitespace(&key);
dbfn_delete(dbblock + current, key);
}
else if (Ustrncmp(cmd, "close", 5) == 0)
{
- uschar *s = cmd + 5;
- while (isspace((uschar)*s)) s++;
+ uschar * s = cmd + 5;
+ Uskip_whitespace(&s);
i = Uatoi(s);
if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); else
{
else if (Ustrncmp(cmd, "file", 4) == 0)
{
- uschar *s = cmd + 4;
- while (isspace((uschar)*s)) s++;
+ uschar * s = cmd + 4;
+ Uskip_whitespace(&s);
i = Uatoi(s);
if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n");
else current = i;
#endif
/* End of dbfn.c */
+/* vi: aw ai sw=2
+*/
git://git.exim.org / exim.git / blobdiff