diff options
Diffstat (limited to 'nss/nss_db/db-open.c')
| -rw-r--r-- | nss/nss_db/db-open.c | 308 |
1 files changed, 240 insertions, 68 deletions
diff --git a/nss/nss_db/db-open.c b/nss/nss_db/db-open.c index 75d39efaf6..470af043a6 100644 --- a/nss/nss_db/db-open.c +++ b/nss/nss_db/db-open.c @@ -1,5 +1,5 @@ -/* Common database open/close routines for nss_db. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. +/* Common database routines for nss_db. + Copyright (C) 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -17,10 +17,12 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <errno.h> #include <fcntl.h> #include <dlfcn.h> #include <errno.h> #include <stdlib.h> +#include <libintl.h> #include <bits/libc-lock.h> #include "dummy-db.h" @@ -41,30 +43,54 @@ static void *libdb_handle; enum { nodb, db24, - db27 + db27, + db30 } libdb_version; static int (*libdb_db_open) (const char *, int, uint32_t, int, void *, void *, void **); +static int (*libdb_db_create) (void *, void *, uint32_t); + +/* Constants which vary from version to version are actually variables + here. */ +int db_first; +int db_next; +int db_nooverwrite; +int db_truncate; +int db_rdonly; +/* Variables which keep track of the error values. */ +int db_keyexist; +int db_notfound; + /* Locks the static variables in this file. */ __libc_lock_define_initialized (static, lock) /* Dynamically load the database library. - We try libdb2.so.3, maybe others in the future. */ -static int + We try currently: + - libdb.so.3: the name used by glibc 2.1 + - libdb-3.0.so: the name used by db-3.0.x + and maybe others in the future. */ + +int load_db (void) { - static const char *libnames[] = { "libdb.so.3" }; + static const char *libnames[] = { "libdb.so.3", "libdb-3.0.so" }; int x; - for(x = 0; x < sizeof (libnames) / sizeof (libnames[0]); ++x) + for (x = 0; x < sizeof (libnames) / sizeof (libnames[0]); ++x) { libdb_handle = dlopen (libnames[x], RTLD_LAZY); if (libdb_handle == NULL) continue; - libdb_db_open = dlsym (libdb_handle, "db_open"); - if (libdb_db_open != NULL) + /* db 3.0 has db_create instead of db_open. */ + libdb_db_create = dlsym (libdb_handle, "db_create"); + + if (libdb_db_create == NULL) + /* db 2.x uses db_open. */ + libdb_db_open = dlsym (libdb_handle, "db_open"); + + if (libdb_db_open != NULL || libdb_db_create != NULL) { /* Alright, we got a library. Now find out which version it is. */ const char *(*db_version) (int *, int *, int *); @@ -76,19 +102,55 @@ load_db (void) int major, minor, subminor; DL_CALL_FCT (db_version, (&major, &minor, &subminor)); - if (major == 2) + switch (major) { - /* We currently cannot handle other versions than the - 2.x series. */ - if (minor < 6 || (minor == 6 && subminor < 4)) - libdb_version = db24; - else - libdb_version = db27; + case 2: + /* Sanity check: Do we have db_open? */ + if (libdb_db_open != NULL) + { + if (minor < 6 || (minor == 6 && subminor < 4)) + { + libdb_version = db24; + db_first = DB24_FIRST; + db_next = DB24_NEXT; + db_nooverwrite = DB24_NOOVERWRITE; + db_truncate = DB24_TRUNCATE; + } + else + { + libdb_version = db27; + db_first = DB27_FIRST; + db_next = DB27_NEXT; + db_nooverwrite = DB27_NOOVERWRITE; + db_truncate = DB27_TRUNCATE; + } + db_keyexist = DB2x_KEYEXIST; + db_notfound = DB2x_NOTFOUND; + db_rdonly = DB2x_RDONLY; + } + break; + case 3: + /* Sanity check: Do we have db_create? */ + if (libdb_db_create != NULL) + { + libdb_version = db30; + db_first = DB30_FIRST; + db_next = DB30_NEXT; + db_keyexist = DB30_KEYEXIST; + db_notfound = DB30_NOTFOUND; + db_rdonly = DB30_RDONLY; + } + break; + default: + break; } } - if (libdb_version != nodb) return 0; + + /* Clear variables. */ + libdb_db_open = NULL; + libdb_db_create = NULL; } dlclose (libdb_handle); @@ -98,7 +160,6 @@ load_db (void) return 1; } - /* Make sure we don't use the library anymore once we are shutting down. */ static void __attribute__ ((destructor)) unload_db (void) @@ -106,83 +167,206 @@ unload_db (void) if (libdb_handle != NULL) { libdb_db_open = NULL; + libdb_db_create = NULL; libdb_version = nodb; dlclose (libdb_handle); } } - enum nss_status internal_setent (const char *file, NSS_DB **dbp) { enum nss_status status = NSS_STATUS_SUCCESS; - int err; - void *db; - int fd; - int result; - if (*dbp == NULL) { - if (libdb_db_open == NULL) + if (libdb_db_open == NULL && libdb_db_create == NULL) { __libc_lock_lock (lock); - err = load_db (); + status = load_db (); __libc_lock_unlock (lock); - if (err != 0) - return NSS_STATUS_UNAVAIL; + if (status != 0) + return status; } - /* Open the database. Fortunately this interface seems to be the - same for all supported versions. */ - err = DL_CALL_FCT (libdb_db_open, - (file, DB_BTREE, DB_RDONLY, 0, NULL, NULL, &db)); + status = dbopen (file, db_rdonly, 0, dbp); + } + + return status; +} + + +/* Close the database file. */ +void +internal_endent (NSS_DB **dbp) +{ + NSS_DB *db = *dbp; + if (db != NULL) + { + DL_CALL_FCT (db->close, (db->db, 0)); + *dbp = NULL; + } +} + +int +db_cursor (void *db, void *txn, NSS_DBC **dbcp) +{ + void *ptr; + NSS_DBC *dbc = NULL; + int ret; + + switch (libdb_version) + { + case db24: + ret = ((struct db24 *) db)->cursor (db, txn, &ptr); + break; + case db27: + ret = ((struct db27 *) db)->cursor (db, txn, &ptr, 0); + break; + case db30: + ret = ((struct db30 *) db)->cursor (db, txn, &ptr, 0); + break; + default: + abort (); + } + if (ret == 0) + { + dbc = (NSS_DBC *) malloc (sizeof (NSS_DBC)); + if (dbc == NULL) + return 1; + dbc->cursor = ptr; + + switch (libdb_version) + { + case db24: + dbc->c_get = + (int (*) (void *, void *, void *, uint32_t)) + ((struct dbc24 *) ptr)->c_get; + break; + case db27: + dbc->c_get = + (int (*) (void *, void *, void *, uint32_t)) + ((struct dbc27 *) ptr)->c_get; + break; + case db30: + dbc->c_get = + (int (*) (void *, void *, void *, uint32_t)) + ((struct dbc30 *) ptr)->c_get; + default: + abort (); + } + } + + *dbcp = dbc; + + return ret; +} + + +int +dbopen (const char *fname, int oper, int mode, NSS_DB **dbp) +{ + int err; + int result; + int fd; + void *odb; + enum nss_status status = NSS_STATUS_SUCCESS; + NSS_DB *db; + + /* Actually open the database. */ + switch (libdb_version) + { + case db24: + case db27: + err = DL_CALL_FCT (libdb_db_open, + (fname, DB_BTREE, oper, mode, NULL, NULL, &odb)); + if (err != 0) + { + __set_errno (err); + *dbp = NULL; + return err == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL; + } + break; + case db30: + err = DL_CALL_FCT (libdb_db_create, (&odb, NULL, 0)); if (err != 0) { __set_errno (err); *dbp = NULL; return err == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL; } + err = ((struct db30 *) odb)->open (odb, fname, NULL, DB_BTREE, + oper, mode); + if (err != 0) + { + __set_errno (err); + /* Free all resources. */ + ((struct db30 *) odb)->close (odb, 0); + *dbp = NULL; + return NSS_STATUS_UNAVAIL; + } + break; + default: + abort (); + } - /* Construct the object we pass up. */ - *dbp = (NSS_DB *) malloc (sizeof (NSS_DB)); - if (*dbp == NULL) - return NSS_STATUS_UNAVAIL; - - (*dbp)->db = db; + /* Construct the object we pass up. */ + db = (NSS_DB *) malloc (sizeof (NSS_DB)); + if (db != NULL) + { + db->db = odb; /* The functions are at different positions for the different versions. Sigh. */ switch (libdb_version) { case db24: - (*dbp)->close = - (int (*) (void *, uint32_t)) ((struct db24 *) db)->close; - (*dbp)->fd = - (int (*) (void *, int *)) ((struct db24 *) db)->fd; - (*dbp)->get = + db->close = + (int (*) (void *, uint32_t)) ((struct db24 *) odb)->close; + db->fd = + (int (*) (void *, int *)) ((struct db24 *) odb)->fd; + db->get = (int (*) (void *, void *, void *, void *, uint32_t)) - ((struct db24 *) db)->get; + ((struct db24 *) odb)->get; + db->put = + (int (*) (void *, void *, void *, void *, uint32_t)) + ((struct db24 *) odb)->put; break; case db27: - (*dbp)->close = - (int (*) (void *, uint32_t)) ((struct db27 *) db)->close; - (*dbp)->fd = - (int (*) (void *, int *)) ((struct db27 *) db)->fd; - (*dbp)->get = + db->close = + (int (*) (void *, uint32_t)) ((struct db27 *) odb)->close; + db->fd = + (int (*) (void *, int *)) ((struct db27 *) odb)->fd; + db->get = + (int (*) (void *, void *, void *, void *, uint32_t)) + ((struct db27 *) odb)->get; + db->put = + (int (*) (void *, void *, void *, void *, uint32_t)) + ((struct db27 *) odb)->put; + break; + case db30: + db->close = + (int (*) (void *, uint32_t)) ((struct db30 *) odb)->close; + db->fd = + (int (*) (void *, int *)) ((struct db30 *) odb)->fd; + db->get = + (int (*) (void *, void *, void *, void *, uint32_t)) + ((struct db30 *) odb)->get; + db->put = (int (*) (void *, void *, void *, void *, uint32_t)) - ((struct db27 *) db)->get; + ((struct db30 *) odb)->put; break; default: abort (); } + db->cursor = db_cursor; /* We have to make sure the file is `closed on exec'. */ - err = DL_CALL_FCT ((*dbp)->fd, (db, &fd)); + err = DL_CALL_FCT (db->fd, (odb, &fd)); if (err != 0) { __set_errno (err); @@ -202,25 +386,13 @@ internal_setent (const char *file, NSS_DB **dbp) { /* Something went wrong. Close the stream and return a failure. */ - DL_CALL_FCT ((*dbp)->close, (db, 0)); + DL_CALL_FCT (db->close, (odb, 0)); + free (db); status = NSS_STATUS_UNAVAIL; - free (*dbp); - *dbp = NULL; + db = NULL; } } - + *dbp = db; + return status; } - - -/* Close the database file. */ -void -internal_endent (NSS_DB **dbp) -{ - NSS_DB *db = *dbp; - if (db != NULL) - { - DL_CALL_FCT (db->close, (db->db, 0)); - *dbp = NULL; - } -} |