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xmldb

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This commit is contained in:
Olof hagsand 2016-03-07 20:55:55 +01:00
parent ca18b7f49e
commit 0a812696c2
47 changed files with 1818 additions and 1783 deletions
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111
lib/src/clixon_qdb.c
View file

@ -18,6 +18,25 @@
along with CLIXON; see the file LICENSE. If not, see
<http://www.gnu.org/licenses/>.
* @note Some unclarities with locking. man dpopen defines the following flags
* with dpopen:
* `DP_ONOLCK', which means it opens a database file without
* file locking,
* `DP_OLCKNB', which means locking is performed without blocking.
*
* While connecting as a writer, an exclusive lock is invoked to
* the database file. While connecting as a reader, a shared lock is
* invoked to the database file. The thread blocks until the lock is
* achieved. If `DP_ONOLCK' is used, the application is responsible
* for exclusion control.
* The code below uses for
* write, delete: DP_OLCKNB
* read: DP_OLCKNB
* This means that a write fails if one or many reads are occurring, and
* a read or write fails if a write is occurring, and
* QDBM allows a single write _or_ multiple readers, but
* not both. This is obviously extremely limiting.
* NOTE, the locking in netconf and xmldb is a write lock.
*/
#ifdef HAVE_CONFIG_H
@ -33,10 +52,10 @@
#include <sys/types.h>
#include <limits.h>
#include <regex.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/param.h>
#if defined(HAVE_DEPOT_H) || defined(HAVE_QDBM_DEPOT_H)
#ifdef HAVE_DEPOT_H
#include <depot.h> /* qdb api */
#else /* HAVE_QDBM_DEPOT_H */
@ -57,7 +76,8 @@
* @param[in] omode see man dpopen
*/
static int
db_init_mode(char *file, int omode)
db_init_mode(char *file,
int omode)
{
DEPOT *dp;
@ -85,6 +105,16 @@ db_init(char *file)
return db_init_mode(file, DP_OWRITER | DP_OCREAT ); /* DP_OTRUNC? */
}
int
db_delete(char *file)
{
if (unlink(file) < 0){
clicon_err(OE_DB, errno, "unlink %s", file);
return -1;
}
return 0;
}
/*! Write data to database
* @param[in] file database file
* @param[in] key database key
@ -99,7 +129,7 @@ db_set(char *file, char *key, void *data, size_t datalen)
DEPOT *dp;
/* Open database for writing */
if ((dp = dpopen(file, DP_OWRITER | DP_OLCKNB, 0)) == NULL){
if ((dp = dpopen(file, DP_OWRITER|DP_OLCKNB , 0)) == NULL){
clicon_err(OE_DB, 0, "db_set: dpopen(%s): %s",
file,
dperrmsg(dpecode));
@ -263,7 +293,6 @@ db_del(char *file, char *key)
return retval;
}
/*! Check if entry in database exists
* @param[in] file database file
* @param[in] key database key
@ -457,6 +486,78 @@ db_sanitize(char *rx, const char *label)
return NULL;
}
#if 0 /* Test program */
/*
* Turn this on to get an xpath test program
* Usage: clicon_xpath [<xpath>]
* read xml from input
* Example compile:
gcc -g -o qdb -I. -I../clixon ./clixon_qdb.c -lclixon -lcligen -lqdbm
*/
static int
usage(char *argv0)
{
fprintf(stderr, "usage:\n");
fprintf(stderr, "\t%s init <filename>\n", argv0);
fprintf(stderr, "\t%s read <filename> <key>\n", argv0);
fprintf(stderr, "\t%s write <filename> <key> <val>\n", argv0);
fprintf(stderr, "\t%s openread <filename>\n", argv0);
fprintf(stderr, "\t%s openwrite <filename>\n", argv0);
exit(0);
}
int
main(int argc, char **argv)
{
char *verb;
char *filename;
char *key;
char *val;
size_t len;
DEPOT *dp;
if (argc < 3)
usage(argv[0]);
clicon_log_init(__FILE__, LOG_INFO, CLICON_LOG_STDERR);
verb = argv[1];
filename = argv[2];
if (strcmp(verb, "init")==0){
db_init(filename);
}
else if (strcmp(verb, "read")==0){
if (argc < 4)
usage(argv[0]);
key = argv[3];
db_get_alloc(filename, key, (void**)&val, &len);
fprintf(stdout, "%s\n", val);
}
else if (strcmp(verb, "write")==0){
if (argc < 5)
usage(argv[0]);
key = argv[3];
val = argv[4];
db_set(filename, key, val, strlen(val)+1);
}
else if (strcmp(verb, "openread")==0){
if ((dp = dpopen(filename, DP_OREADER | DP_OLCKNB, 0)) == NULL){
clicon_err(OE_DB, dpecode, "dbopen: %s",
dperrmsg(dpecode));
return -1;
}
sleep(1000000);
}
else if (strcmp(verb, "openwrite")==0){
if ((dp = dpopen(filename, DP_OWRITER | DP_OLCKNB, 0)) == NULL){
clicon_err(OE_DB, dpecode, "dbopen: %s",
dperrmsg(dpecode));
return -1;
}
sleep(1000000);
}
return 0;
}
#endif /* Test program */
#endif /* DEPOT */