diff options
Diffstat (limited to 'contrib/sendmail/libsmdb/smdb.c')
| -rw-r--r-- | contrib/sendmail/libsmdb/smdb.c | 549 |
1 files changed, 0 insertions, 549 deletions
diff --git a/contrib/sendmail/libsmdb/smdb.c b/contrib/sendmail/libsmdb/smdb.c deleted file mode 100644 index 6eb4033..0000000 --- a/contrib/sendmail/libsmdb/smdb.c +++ /dev/null @@ -1,549 +0,0 @@ -/* -** Copyright (c) 1999-2002 Sendmail, Inc. and its suppliers. -** All rights reserved. -** -** By using this file, you agree to the terms and conditions set -** forth in the LICENSE file which can be found at the top level of -** the sendmail distribution. -*/ - -#include <sm/gen.h> -SM_RCSID("@(#)$Id: smdb.c,v 8.58 2004/08/03 20:58:38 ca Exp $") - -#include <fcntl.h> -#include <stdlib.h> -#include <unistd.h> - - -#include <sendmail/sendmail.h> -#include <libsmdb/smdb.h> - -static bool smdb_lockfile __P((int, int)); - -/* -** SMDB_MALLOC_DATABASE -- Allocates a database structure. -** -** Parameters: -** None -** -** Returns: -** An pointer to an allocated SMDB_DATABASE structure or -** NULL if it couldn't allocate the memory. -*/ - -SMDB_DATABASE * -smdb_malloc_database() -{ - SMDB_DATABASE *db; - - db = (SMDB_DATABASE *) malloc(sizeof(SMDB_DATABASE)); - - if (db != NULL) - (void) memset(db, '\0', sizeof(SMDB_DATABASE)); - - return db; -} - - -/* -** SMDB_FREE_DATABASE -- Unallocates a database structure. -** -** Parameters: -** database -- a SMDB_DATABASE pointer to deallocate. -** -** Returns: -** None -*/ - -void -smdb_free_database(database) - SMDB_DATABASE *database; -{ - if (database != NULL) - free(database); -} -/* -** SMDB_LOCKFILE -- lock a file using flock or (shudder) fcntl locking -** -** Parameters: -** fd -- the file descriptor of the file. -** type -- type of the lock. Bits can be: -** LOCK_EX -- exclusive lock. -** LOCK_NB -- non-blocking. -** -** Returns: -** true if the lock was acquired. -** false otherwise. -*/ - -static bool -smdb_lockfile(fd, type) - int fd; - int type; -{ - int i; - int save_errno; -#if !HASFLOCK - int action; - struct flock lfd; - - (void) memset(&lfd, '\0', sizeof lfd); - if (bitset(LOCK_UN, type)) - lfd.l_type = F_UNLCK; - else if (bitset(LOCK_EX, type)) - lfd.l_type = F_WRLCK; - else - lfd.l_type = F_RDLCK; - - if (bitset(LOCK_NB, type)) - action = F_SETLK; - else - action = F_SETLKW; - - while ((i = fcntl(fd, action, &lfd)) < 0 && errno == EINTR) - continue; - if (i >= 0) - return true; - save_errno = errno; - - /* - ** On SunOS, if you are testing using -oQ/tmp/mqueue or - ** -oA/tmp/aliases or anything like that, and /tmp is mounted - ** as type "tmp" (that is, served from swap space), the - ** previous fcntl will fail with "Invalid argument" errors. - ** Since this is fairly common during testing, we will assume - ** that this indicates that the lock is successfully grabbed. - */ - - if (save_errno == EINVAL) - return true; - - if (!bitset(LOCK_NB, type) || - (save_errno != EACCES && save_errno != EAGAIN)) - { -# if 0 - int omode = fcntl(fd, F_GETFL, NULL); - int euid = (int) geteuid(); - - syslog(LOG_ERR, "cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", - filename, ext, fd, type, omode, euid); -# endif /* 0 */ - errno = save_errno; - return false; - } -#else /* !HASFLOCK */ - - while ((i = flock(fd, type)) < 0 && errno == EINTR) - continue; - if (i >= 0) - return true; - save_errno = errno; - - if (!bitset(LOCK_NB, type) || save_errno != EWOULDBLOCK) - { -# if 0 - int omode = fcntl(fd, F_GETFL, NULL); - int euid = (int) geteuid(); - - syslog(LOG_ERR, "cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", - filename, ext, fd, type, omode, euid); -# endif /* 0 */ - errno = save_errno; - return false; - } -#endif /* !HASFLOCK */ - errno = save_errno; - return false; -} -/* -** SMDB_OPEN_DATABASE -- Opens a database. -** -** This opens a database. If type is SMDB_DEFAULT it tries to -** use a DB1 or DB2 hash. If that isn't available, it will try -** to use NDBM. If a specific type is given it will try to open -** a database of that type. -** -** Parameters: -** database -- An pointer to a SMDB_DATABASE pointer where the -** opened database will be stored. This should -** be unallocated. -** db_name -- The name of the database to open. Do not include -** the file name extension. -** mode -- The mode to set on the database file or files. -** mode_mask -- Mode bits that must match on an opened database. -** sff -- Flags to safefile. -** type -- The type of database to open. Supported types -** vary depending on what was compiled in. -** user_info -- Information on the user to use for file -** permissions. -** params -- Params specific to the database being opened. -** Only supports some DB hash options right now -** (see smdb_db_open() for details). -** -** Returns: -** SMDBE_OK -- Success. -** Anything else is an error. Look up more info about the -** error in the comments for the specific open() used. -*/ - -int -smdb_open_database(database, db_name, mode, mode_mask, sff, type, user_info, - params) - SMDB_DATABASE **database; - char *db_name; - int mode; - int mode_mask; - long sff; - SMDB_DBTYPE type; - SMDB_USER_INFO *user_info; - SMDB_DBPARAMS *params; -{ - bool type_was_default = false; - - if (type == SMDB_TYPE_DEFAULT) - { - type_was_default = true; -#ifdef NEWDB - type = SMDB_TYPE_HASH; -#else /* NEWDB */ -# ifdef NDBM - type = SMDB_TYPE_NDBM; -# endif /* NDBM */ -#endif /* NEWDB */ - } - - if (type == SMDB_TYPE_DEFAULT) - return SMDBE_UNKNOWN_DB_TYPE; - - if ((strncmp(type, SMDB_TYPE_HASH, SMDB_TYPE_HASH_LEN) == 0) || - (strncmp(type, SMDB_TYPE_BTREE, SMDB_TYPE_BTREE_LEN) == 0)) - { -#ifdef NEWDB - int result; - - result = smdb_db_open(database, db_name, mode, mode_mask, sff, - type, user_info, params); -# ifdef NDBM - if (result == ENOENT && type_was_default) - type = SMDB_TYPE_NDBM; - else -# endif /* NDBM */ - return result; -#else /* NEWDB */ - return SMDBE_UNSUPPORTED_DB_TYPE; -#endif /* NEWDB */ - } - - if (strncmp(type, SMDB_TYPE_NDBM, SMDB_TYPE_NDBM_LEN) == 0) - { -#ifdef NDBM - int result; - - result = smdb_ndbm_open(database, db_name, mode, mode_mask, - sff, type, user_info, params); - return result; -#else /* NDBM */ - return SMDBE_UNSUPPORTED_DB_TYPE; -#endif /* NDBM */ - } - - return SMDBE_UNKNOWN_DB_TYPE; -} -/* -** SMDB_ADD_EXTENSION -- Adds an extension to a file name. -** -** Just adds a . followed by a string to a db_name if there -** is room and the db_name does not already have that extension. -** -** Parameters: -** full_name -- The final file name. -** max_full_name_len -- The max length for full_name. -** db_name -- The name of the db. -** extension -- The extension to add. -** -** Returns: -** SMDBE_OK -- Success. -** Anything else is an error. Look up more info about the -** error in the comments for the specific open() used. -*/ - -int -smdb_add_extension(full_name, max_full_name_len, db_name, extension) - char *full_name; - int max_full_name_len; - char *db_name; - char *extension; -{ - int extension_len; - int db_name_len; - - if (full_name == NULL || db_name == NULL || extension == NULL) - return SMDBE_INVALID_PARAMETER; - - extension_len = strlen(extension); - db_name_len = strlen(db_name); - - if (extension_len + db_name_len + 2 > max_full_name_len) - return SMDBE_DB_NAME_TOO_LONG; - - if (db_name_len < extension_len + 1 || - db_name[db_name_len - extension_len - 1] != '.' || - strcmp(&db_name[db_name_len - extension_len], extension) != 0) - (void) sm_snprintf(full_name, max_full_name_len, "%s.%s", - db_name, extension); - else - (void) sm_strlcpy(full_name, db_name, max_full_name_len); - - return SMDBE_OK; -} -/* -** SMDB_LOCK_FILE -- Locks the database file. -** -** Locks the actual database file. -** -** Parameters: -** lock_fd -- The resulting descriptor for the locked file. -** db_name -- The name of the database without extension. -** mode -- The open mode. -** sff -- Flags to safefile. -** extension -- The extension for the file. -** -** Returns: -** SMDBE_OK -- Success, otherwise errno. -*/ - -int -smdb_lock_file(lock_fd, db_name, mode, sff, extension) - int *lock_fd; - char *db_name; - int mode; - long sff; - char *extension; -{ - int result; - char file_name[MAXPATHLEN]; - - result = smdb_add_extension(file_name, sizeof file_name, db_name, - extension); - if (result != SMDBE_OK) - return result; - - *lock_fd = safeopen(file_name, mode & ~O_TRUNC, DBMMODE, sff); - if (*lock_fd < 0) - return errno; - - return SMDBE_OK; -} -/* -** SMDB_UNLOCK_FILE -- Unlocks a file -** -** Unlocks a file. -** -** Parameters: -** lock_fd -- The descriptor for the locked file. -** -** Returns: -** SMDBE_OK -- Success, otherwise errno. -*/ - -int -smdb_unlock_file(lock_fd) - int lock_fd; -{ - int result; - - result = close(lock_fd); - if (result != 0) - return errno; - - return SMDBE_OK; -} -/* -** SMDB_LOCK_MAP -- Locks a database. -** -** Parameters: -** database -- database description. -** type -- type of the lock. Bits can be: -** LOCK_EX -- exclusive lock. -** LOCK_NB -- non-blocking. -** -** Returns: -** SMDBE_OK -- Success, otherwise errno. -*/ - -int -smdb_lock_map(database, type) - SMDB_DATABASE *database; - int type; -{ - int fd; - - fd = database->smdb_lockfd(database); - if (fd < 0) - return SMDBE_NOT_FOUND; - if (!smdb_lockfile(fd, type)) - return SMDBE_LOCK_NOT_GRANTED; - return SMDBE_OK; -} -/* -** SMDB_UNLOCK_MAP -- Unlocks a database -** -** Parameters: -** database -- database description. -** -** Returns: -** SMDBE_OK -- Success, otherwise errno. -*/ - -int -smdb_unlock_map(database) - SMDB_DATABASE *database; -{ - int fd; - - fd = database->smdb_lockfd(database); - if (fd < 0) - return SMDBE_NOT_FOUND; - if (!smdb_lockfile(fd, LOCK_UN)) - return SMDBE_LOCK_NOT_HELD; - return SMDBE_OK; -} -/* -** SMDB_SETUP_FILE -- Gets db file ready for use. -** -** Makes sure permissions on file are safe and creates it if it -** doesn't exist. -** -** Parameters: -** db_name -- The name of the database without extension. -** extension -- The extension. -** sff -- Flags to safefile. -** mode_mask -- Mode bits that must match. -** user_info -- Information on the user to use for file -** permissions. -** stat_info -- A place to put the stat info for the file. -** Returns: -** SMDBE_OK -- Success, otherwise errno. -*/ - -int -smdb_setup_file(db_name, extension, mode_mask, sff, user_info, stat_info) - char *db_name; - char *extension; - int mode_mask; - long sff; - SMDB_USER_INFO *user_info; - struct stat *stat_info; -{ - int st; - int result; - char db_file_name[MAXPATHLEN]; - - result = smdb_add_extension(db_file_name, sizeof db_file_name, db_name, - extension); - if (result != SMDBE_OK) - return result; - - st = safefile(db_file_name, user_info->smdbu_id, - user_info->smdbu_group_id, user_info->smdbu_name, - sff, mode_mask, stat_info); - if (st != 0) - return st; - - return SMDBE_OK; -} -/* -** SMDB_FILECHANGED -- Checks to see if a file changed. -** -** Compares the passed in stat_info with a current stat on -** the passed in file descriptor. Check filechanged for -** return values. -** -** Parameters: -** db_name -- The name of the database without extension. -** extension -- The extension. -** db_fd -- A file descriptor for the database file. -** stat_info -- An old stat_info. -** Returns: -** SMDBE_OK -- Success, otherwise errno. -*/ - -int -smdb_filechanged(db_name, extension, db_fd, stat_info) - char *db_name; - char *extension; - int db_fd; - struct stat *stat_info; -{ - int result; - char db_file_name[MAXPATHLEN]; - - result = smdb_add_extension(db_file_name, sizeof db_file_name, db_name, - extension); - if (result != SMDBE_OK) - return result; - return filechanged(db_file_name, db_fd, stat_info); -} -/* -** SMDB_PRINT_AVAILABLE_TYPES -- Prints the names of the available types. -** -** Parameters: -** None -** -** Returns: -** None -*/ - -void -smdb_print_available_types() -{ -#ifdef NDBM - printf("dbm\n"); -#endif /* NDBM */ -#ifdef NEWDB - printf("hash\n"); - printf("btree\n"); -#endif /* NEWDB */ -} -/* -** SMDB_DB_DEFINITION -- Given a database type, return database definition -** -** Reads though a structure making an association with the database -** type and the required cpp define from sendmail/README. -** List size is dynamic and must be NULL terminated. -** -** Parameters: -** type -- The name of the database type. -** -** Returns: -** definition for type, otherwise NULL. -*/ - -typedef struct -{ - SMDB_DBTYPE type; - char *dbdef; -} dbtype; - -static dbtype DatabaseDefs[] = -{ - { SMDB_TYPE_HASH, "NEWDB" }, - { SMDB_TYPE_BTREE, "NEWDB" }, - { SMDB_TYPE_NDBM, "NDBM" }, - { NULL, "OOPS" } -}; - -char * -smdb_db_definition(type) - SMDB_DBTYPE type; -{ - dbtype *ptr = DatabaseDefs; - - while (ptr != NULL && ptr->type != NULL) - { - if (strcmp(type, ptr->type) == 0) - return ptr->dbdef; - ptr++; - } - return NULL; -} |
