int
pw_dbm_remove(const struct passwd *pw)
{
datum key;
static int once;
char data[BUFSIZ];
if (! once) {
if (! pw_dbm)
setpwent ();
once++;
}
if (! pw_dbm)
return 0;
key.dsize = strlen (pw->pw_name);
key.dptr = pw->pw_name;
if (dbm_delete (pw_dbm, key))
return 0;
key.dsize = sizeof pw->pw_uid;
key.dptr = (char *) &pw->pw_uid;
if (dbm_delete (pw_dbm, key))
return 0;
return 1;
}
int database_delete(DBM *db, s48_value key)
{
datum work_key;
work_key.dptr = ADDRESS_AFTER_HEADER(key, char);
work_key.dsize = S48_STRING_LENGTH(key);
return(dbm_delete(db, work_key));
}
value caml_dbm_delete(value vdb, value vkey) /* ML */
{
datum key;
key.dptr = String_val(vkey);
key.dsize = string_length(vkey);
if (dbm_delete(extract_dbm(vdb), key) < 0)
raise_dbm("dbm_delete");
else return Val_unit;
}
void runSuccess() {
char buf[] = "file";
//@ assert \valid(buf+(0..\block_length(buf)-1));
//@ assert \exists integer x; buf[x] == '\0';
DBM* db = dbm_open(buf, O_RDWR, S_IRUSR);
if (db == NULL) {return;}
dbm_delete(db, anydatum());
}
int
otp_delete (void *v, OtpContext *ctx)
{
DBM *dbm = (DBM *)v;
datum key;
key.dsize = strlen(ctx->user);
key.dptr = ctx->user;
return dbm_delete(dbm, key);
}
int
ldbm_delete( LDBM ldbm, Datum key )
{
int rc;
LDBM_WLOCK;
rc = dbm_delete( ldbm, key );
LDBM_WUNLOCK;
return rc;
}
static apr_status_t vt_ndbm_del(apr_dbm_t *dbm, apr_datum_t key)
{
int rc;
datum kd;
kd.dptr = key.dptr;
kd.dsize = key.dsize;
rc = dbm_delete(dbm->file, kd);
/* store any error info into DBM, and return a status code. */
return set_error(dbm, ndbm2s(rc));
}
void dbm_del_group(DBM *dbmgroup, char *group) {
datum key,resp;
key.dptr = group;
key.dsize = strlen(group);
resp = dbm_fetch(dbmgroup,key);
if (resp.dptr) {
printf("Deleting group %s.\n",group);
dbm_delete(dbmgroup,key);
} else {
fprintf(stderr,"Group %s does not exist.\n",group);
exit(1);
}
}
void testValues() {
f = 2;
int result;
char buf[] = "file";
//@ assert \valid(buf+(0..\block_length(buf)-1));
//@ assert \exists integer x; buf[x] == '\0';
DBM* db = dbm_open(buf, O_RDWR, S_IRUSR);
if (db == NULL) {return;}
result = dbm_delete(db, anydatum());
//@ assert result <= 0;
//@ assert f == 2;
//@ assert vacuous: \false;
}
static int
dbm_ass_sub(dbmobject *dp, PyObject *v, PyObject *w)
{
datum krec, drec;
int tmp_size;
if ( !PyArg_Parse(v, "s#", &krec.dptr, &tmp_size) ) {
PyErr_SetString(PyExc_TypeError,
"dbm mappings have string indices only");
return -1;
}
krec.dsize = tmp_size;
if (dp->di_dbm == NULL) {
PyErr_SetString(DbmError, "DBM object has already been closed");
return -1;
}
dp->di_size = -1;
if (w == NULL) {
if ( dbm_delete(dp->di_dbm, krec) < 0 ) {
dbm_clearerr(dp->di_dbm);
PyErr_SetString(PyExc_KeyError,
PyString_AS_STRING((PyStringObject *)v));
return -1;
}
} else {
if ( !PyArg_Parse(w, "s#", &drec.dptr, &tmp_size) ) {
PyErr_SetString(PyExc_TypeError,
"dbm mappings have string elements only");
return -1;
}
drec.dsize = tmp_size;
if ( dbm_store(dp->di_dbm, krec, drec, DBM_REPLACE) < 0 ) {
dbm_clearerr(dp->di_dbm);
PyErr_SetString(DbmError,
"cannot add item to database");
return -1;
}
}
if ( dbm_error(dp->di_dbm) ) {
dbm_clearerr(dp->di_dbm);
PyErr_SetString(DbmError, "");
return -1;
}
return 0;
}
static krb5_error_code
NDBM__del(krb5_context context, HDB *db, krb5_data key)
{
struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
datum k;
int code;
krb5_error_code ret;
k.dptr = key.data;
k.dsize = key.length;
ret = db->hdb_lock(context, db, HDB_WLOCK);
if(ret) return ret;
code = dbm_delete(d->db, k);
db->hdb_unlock(context, db);
if(code < 0)
return errno;
return 0;
}
int del_cdt_entry(const char *cd_catalog_ptr, const int track_no) {
char key_to_del[CAT_CAT_LEN + 10];
datum local_key_datum;
int result;
/* check database initialized and parameters valid */
if (!cdc_dbm_ptr || !cdt_dbm_ptr) return (0);
if (strlen(cd_catalog_ptr) >= CAT_CAT_LEN) return (0);
/* ensure the search key contains only the valid string and nulls */
memset(&key_to_del, '\0', sizeof(key_to_del));
sprintf(key_to_del, "%s %d", cd_catalog_ptr, track_no);
local_key_datum.dptr = (void *) key_to_del;
local_key_datum.dsize = sizeof(key_to_del);
result = dbm_delete(cdt_dbm_ptr, local_key_datum);
/* dbm_delete() uses 0 for success */
if (result == 0) return (1);
return (0);
} /* del_cdt_entry */
static int
_ndbm_delete (mu_dbm_file_t db, struct mu_dbm_datum const *key)
{
DBM *dbm = db->db_descr;
datum keydat;
keydat.dptr = key->mu_dptr;
keydat.dsize = key->mu_dsize;
errno = 0;
switch (dbm_delete (dbm, keydat))
{
case 0:
break;
case 1:
return MU_ERR_NOENT;
case -1:
db->db_errno.n = errno;
return MU_ERR_FAILURE;
}
return 0;
}
int main(void)
{
struct test_data items_to_store[ITEMS_USED];
struct test_data items_retrieved;
char key_to_use[20];
int i, result;
datum key_datum;
datum data_datum;
DBM *dbm_ptr;
dbm_ptr = dbm_open(TEST_DB_FILE, O_RDWR | O_CREAT, 0666);
if(!dbm_ptr) {
fprintf(stderr, "Failed to open database\n");
exit(EXIT_FAILURE);
}
memset(items_to_store, '\0', sizeof(items_to_store));
strcpy(items_to_store[0].misc_chars, "First!");
items_to_store[0].any_integer = 47;
strcpy(items_to_store[0].more_chars, "foo");
strcpy(items_to_store[1].misc_chars, "bar");
items_to_store[1].any_integer = 13;
strcpy(items_to_store[1].more_chars, "unlucky?");
strcpy(items_to_store[2].misc_chars, "Third");
items_to_store[2].any_integer = 3;
strcpy(items_to_store[2].more_chars, "baz");
for(i = 0; i < ITEMS_USED; i++) {
sprintf(key_to_use, "%c%c%d", items_to_store[i].misc_chars[0],
items_to_store[i].more_chars[0], items_to_store[i].any_integer);
key_datum.dptr = (void *)key_to_use;
key_datum.dsize = strlen(key_to_use);
data_datum.dptr = (void *)&items_to_store[i];
data_datum.dsize = sizeof(struct test_data);
result = dbm_store(dbm_ptr, key_datum, data_datum, DBM_REPLACE);
if(result != 0) {
fprintf(stderr, "dbm_store failed on key %s\n", key_to_use);
exit(2);
}
}
/* let's delete some data */
sprintf(key_to_use, "bu%d", 13);
key_datum.dptr = key_to_use;
key_datum.dsize = strlen(key_to_use);
if(dbm_delete(dbm_ptr, key_datum) == 0)
printf("Data with key %s deleted\n", key_to_use);
else
printf("nothing deleted for key %s", key_to_use);
for(key_datum =dbm_firstkey(dbm_ptr); key_datum.dptr;
key_datum = dbm_nextkey(dbm_ptr)) {
data_datum = dbm_fetch(dbm_ptr, key_datum);
if(data_datum.dptr) {
printf("Data retrieved\n");
memcpy(&items_retrieved, data_datum.dptr, data_datum.dsize);
printf("Retrieved items - %s %d %s\n", items_retrieved.misc_chars,
items_retrieved.any_integer, items_retrieved.more_chars);
}
else
printf("No data found for key %s\n", key_to_use);
}
dbm_close(dbm_ptr);
exit(EXIT_SUCCESS);
}
int
main(int argc, char **argv)
{
typedef enum {
YOW, FETCH, STORE, DELETE, SCAN, REGEXP
} commands;
char opt;
int flags;
int giveusage = 0;
int verbose = 0;
commands what = YOW;
char *comarg[3];
int st_flag = DBM_INSERT;
int argn;
DBM *db;
datum key;
datum content;
flags = O_RDWR;
argn = 0;
while ((opt = getopt(argc, argv, "acdfFm:rstvx")) != ':') {
switch (opt) {
case 'a':
what = SCAN;
break;
case 'c':
flags |= O_CREAT;
break;
case 'd':
what = DELETE;
break;
case 'f':
what = FETCH;
break;
case 'F':
what = REGEXP;
break;
case 'm':
flags &= ~(000007);
if (strcmp(optarg, "r") == 0)
flags |= O_RDONLY;
else if (strcmp(optarg, "w") == 0)
flags |= O_WRONLY;
else if (strcmp(optarg, "rw") == 0)
flags |= O_RDWR;
else {
fprintf(stderr, "Invalid mode: \"%s\"\n", optarg);
giveusage = 1;
}
break;
case 'r':
st_flag = DBM_REPLACE;
break;
case 's':
what = STORE;
break;
case 't':
flags |= O_TRUNC;
break;
case 'v':
verbose = 1;
break;
case 'x':
flags |= O_EXCL;
break;
case '!':
giveusage = 1;
break;
case '?':
if (argn < 3)
comarg[argn++] = optarg;
else {
fprintf(stderr, "Too many arguments.\n");
giveusage = 1;
}
break;
}
}
if (giveusage || what == YOW || argn < 1) {
fprintf(stderr, "Usage: %s database [-m r|w|rw] [-crtx] -a|-d|-f|-F|-s [key [content]]\n", argv[0]);
exit(-1);
}
if ((db = dbm_open(comarg[0], flags, 0777)) == NULL) {
fprintf(stderr, "Error opening database \"%s\"\n", comarg[0]);
exit(-1);
}
if (argn > 1)
key = read_datum(comarg[1]);
if (argn > 2)
content = read_datum(comarg[2]);
switch (what) {
case SCAN:
key = dbm_firstkey(db);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching first key\n");
goto db_exit;
}
while (key.dptr != NULL) {
content = dbm_fetch(db, key);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching ");
print_datum(key);
printf("\n");
goto db_exit;
}
print_datum(key);
printf(": ");
print_datum(content);
printf("\n");
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching next key\n");
goto db_exit;
}
key = dbm_nextkey(db);
}
break;
case REGEXP:
if (argn < 2) {
fprintf(stderr, "Missing regular expression.\n");
goto db_exit;
}
if (re_comp(comarg[1])) {
fprintf(stderr, "Invalid regular expression\n");
goto db_exit;
}
key = dbm_firstkey(db);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching first key\n");
goto db_exit;
}
while (key.dptr != NULL) {
if (re_exec(key2s(key))) {
content = dbm_fetch(db, key);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching ");
print_datum(key);
printf("\n");
goto db_exit;
}
print_datum(key);
printf(": ");
print_datum(content);
printf("\n");
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching next key\n");
goto db_exit;
}
}
key = dbm_nextkey(db);
}
break;
case FETCH:
if (argn < 2) {
fprintf(stderr, "Missing fetch key.\n");
goto db_exit;
}
content = dbm_fetch(db, key);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching ");
print_datum(key);
printf("\n");
goto db_exit;
}
if (content.dptr == NULL) {
fprintf(stderr, "Cannot find ");
print_datum(key);
printf("\n");
goto db_exit;
}
print_datum(key);
printf(": ");
print_datum(content);
printf("\n");
break;
case DELETE:
if (argn < 2) {
fprintf(stderr, "Missing delete key.\n");
goto db_exit;
}
if (dbm_delete(db, key) || dbm_error(db)) {
fprintf(stderr, "Error when deleting ");
print_datum(key);
printf("\n");
goto db_exit;
}
if (verbose) {
print_datum(key);
printf(": DELETED\n");
}
break;
case STORE:
if (argn < 3) {
fprintf(stderr, "Missing key and/or content.\n");
goto db_exit;
}
if (dbm_store(db, key, content, st_flag) || dbm_error(db)) {
fprintf(stderr, "Error when storing ");
print_datum(key);
printf("\n");
goto db_exit;
}
if (verbose) {
print_datum(key);
printf(": ");
print_datum(content);
printf(" STORED\n");
}
break;
}
db_exit:
dbm_clearerr(db);
dbm_close(db);
if (dbm_error(db)) {
fprintf(stderr, "Error closing database \"%s\"\n", comarg[0]);
exit(-1);
}
}
int _sasldb_putdata(const sasl_utils_t *utils,
sasl_conn_t *conn,
const char *authid,
const char *realm,
const char *propName,
const char *data, size_t data_len)
{
int result = SASL_OK;
char *key;
size_t key_len;
DBM *db;
datum dkey;
void *cntxt;
sasl_getopt_t *getopt;
const char *path = SASL_DB_PATH;
if (!utils) return SASL_BADPARAM;
if (!authid || !realm || !propName) {
utils->seterror(conn, 0,
"Bad parameter in db_ndbm.c: _sasldb_putdata");
return SASL_BADPARAM;
}
result = _sasldb_alloc_key(utils, authid, realm, propName,
&key, &key_len);
if (result != SASL_OK) {
utils->seterror(conn, 0,
"Could not allocate key in _sasldb_putdata");
return result;
}
if (utils->getcallback(conn, SASL_CB_GETOPT,
(sasl_callback_ft *)&getopt, &cntxt) == SASL_OK) {
const char *p;
if (getopt(cntxt, NULL, "sasldb_path", &p, NULL) == SASL_OK
&& p != NULL && *p != 0) {
path = p;
}
}
db = dbm_open(path,
O_RDWR | O_CREAT,
S_IRUSR | S_IWUSR);
if (! db) {
utils->log(conn, SASL_LOG_ERR,
"SASL error opening password file. "
"Do you have write permissions?\n");
utils->seterror(conn, 0, "Could not open db for write");
result = SASL_FAIL;
goto cleanup;
}
dkey.dptr = key;
dkey.dsize = key_len;
if (data) {
datum dvalue;
dvalue.dptr = (void *)data;
if(!data_len) data_len = strlen(data);
dvalue.dsize = data_len;
if (dbm_store(db, dkey, dvalue, DBM_REPLACE)) {
utils->seterror(conn, 0,
"Couldn't update db");
result = SASL_FAIL;
}
} else {
if (dbm_delete(db, dkey)) {
utils->seterror(conn, 0,
"Couldn't update db");
result = SASL_NOUSER;
}
}
dbm_close(db);
cleanup:
utils->free(key);
return result;
}
int main(int argc, char *argv[]) {
int i, dbRet;
DBM *myDB;
datum daKey, daVal;
char *keys[NUMELE] = {"foo", "bar", "foobar", "foo"};
char *vals[NUMELE] = {"FOO", "BAR", "FOOBAR", "FOOZAM"};
/* Open the database (create) */
myDB = dbm_open("ndbmTest", O_RDWR | O_CREAT, 0660);
if(myDB == NULL) {
printf("ERROR: Could not open the DB file. Error number: %d.\n", errno);
exit(1);
} else {
printf("DB created.\n");
printf("DB opened.\n");
}
/* Put stuff in the DB... */
for(i=0; i<NUMELE; i++) {
daKey.dptr = keys[i];
daKey.dsize = strlen(keys[i])+1;
daVal.dptr = vals[i];
daVal.dsize = strlen(vals[i])+1;
dbRet = dbm_store(myDB, daKey, daVal, DBM_INSERT); // DBM_REPLACE for replace behaviour
switch(dbRet) {
case 0:
printf("Store: '%s' ==> '%s'\n", (char *)daKey.dptr, (char *)daVal.dptr);
break;
case 1: // Only can happen with DBM_INSERT
printf("Could not store '%s' because it was already in the DB\n", (char *)daKey.dptr);
break;
default:
printf("ERROR: Could not insert item (%s,%s). \n", (char *)daKey.dptr, (char *)daVal.dptr);
exit(1);
} /* end switch */
} /* end for */
/* Lookup the second one.. */
daKey.dptr = keys[1];
daKey.dsize = strlen(keys[1])+1;
daVal = dbm_fetch(myDB, daKey);
if(daVal.dptr == NULL) {
printf("ERROR: Could not look up %s\n", (char *)daKey.dptr);
} else {
printf("Got record: '%s' ==> '%s'\n", (char *)daKey.dptr, (char *)daVal.dptr);
}
/* Delete an element */
daKey.dptr = keys[1];
daKey.dsize = strlen(keys[1])+1;
if(dbm_delete(myDB, daKey) < 0) {
printf("ERROR: Could not delete item with key %s\n", daKey.dptr);
} else {
printf("Deleted: '%s'\n", (char *)daKey.dptr);
}/* end if */
/* Close the DB (flush everything to the file) */
dbm_close(myDB);
printf("DB closed... Bye!\n");
return 0;
} /* end func main */
void runFailure() {
dbm_delete(NULL, anydatum());
}
int main() {
struct test_data items_to_store[ITEMS_USED];
struct test_data item_retrieved;
char key_to_use[20];
int i, result;
// a datum is dbm's wrapper around binary data. It consists of a void*
// to our data and a size_t giving the data size
datum key_datum;
datum data_datum;
// a DBM struct is a wrapper around two files, one used to track indices
// and another used to store the binary data.
DBM *dbm_p;
dbm_p = dbm_open(TEST_DB_FILE, O_RDWR | O_CREAT, 0666);
if (!dbm_p) {
fprintf(stderr, "Failed to open database\n");
exit(EXIT_FAILURE);
}
// set all data to zero first, then set some data
// note that we *need* all zeros in some cases, e.g. if we use
// char arrays as keys. If they are only used for values it's less
// important.
memset(items_to_store, '\0', sizeof(items_to_store));
// Ff47
strcpy(items_to_store[0].misc_chars, "First!");
items_to_store[0].any_integer = 47;
strcpy(items_to_store[0].more_chars, "foo");
// bu13
strcpy(items_to_store[1].misc_chars, "bar");
items_to_store[1].any_integer = 13;
strcpy(items_to_store[1].more_chars, "unlucky?");
// Tb3
strcpy(items_to_store[2].misc_chars, "Third");
items_to_store[2].any_integer = 3;
strcpy(items_to_store[2].more_chars, "baz");
for (i = 0; i < ITEMS_USED; i++) {
// make the key string
sprintf(key_to_use, "%c%c%d",
items_to_store[i].misc_chars[0],
items_to_store[i].more_chars[0],
items_to_store[i].any_integer);
// make the key. Check that you understand why we *must* use
// strlen() here and not sizeof()
key_datum.dptr = (void *) key_to_use;
key_datum.dsize = strlen(key_to_use);
// make the data
data_datum.dptr = (void *) &items_to_store[i];
data_datum.dsize = sizeof(struct test_data);
// write the data. Note that we have a choice of what to do
// if we see a known key; here it doesn't matter.
result = dbm_store(dbm_p, key_datum, data_datum, DBM_REPLACE);
if (result != 0) {
fprintf(stderr, "Failed to write to database\n");
exit(2);
}
}
// now try retrieving the second entry
sprintf(key_to_use, "bu%d", 13);
key_datum.dptr = (void *) key_to_use;
key_datum.dsize = strlen(key_to_use);
data_datum = dbm_fetch(dbm_p, key_datum);
// if we don't find a key, we get a datum with NULL dptr
if (data_datum.dptr) {
printf("Data retrieved\n");
memcpy(&item_retrieved, data_datum.dptr, data_datum.dsize);
printf("Retrieved item - %s %d %s\n",
item_retrieved.misc_chars,
item_retrieved.any_integer,
item_retrieved.more_chars);
} else {
printf("No data found for key %s\n", key_to_use);
}
printf("\n\nNow we'll try deleting and then cycling\n\n");
// delete the entry we just looked at
if (dbm_delete(dbm_p, key_datum) == 0) {
printf("Data with key %s deleted\n", key_to_use);
} else {
printf("Nothing deleted for key %s\n", key_to_use);
}
// now use dbm_firstkey and dbm_nextkey to iterate over keys.
// ... the order in which they appear is not defined
for (key_datum = dbm_firstkey(dbm_p);
key_datum.dptr; // the end condition is a NULL dptr
key_datum = dbm_nextkey(dbm_p)) {
// get the data. The data_datum shouldn't be null in this situation,
// but it could happen due to race conditions and such, so we should
// still guard against it.
data_datum = dbm_fetch(dbm_p, key_datum);
if (data_datum.dptr) {
printf("Data retrieved for key %s\n", (char *)key_datum.dptr);
memcpy(&item_retrieved, data_datum.dptr, data_datum.dsize);
printf("Retrieved item - %s %d %s\n",
item_retrieved.misc_chars,
item_retrieved.any_integer,
item_retrieved.more_chars);
} else {
// the authors oopsed here, don't use `key_to_use`
printf("No data found for key %s\n", (char *) key_datum.dptr);
}
}
// don't forget to close the database!
dbm_close(dbm_p);
exit(EXIT_SUCCESS);
}
extern int c_dbm_delete (DBM *db, datum *key) {
return dbm_delete(db, *key);
}