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Add watch query/enumeration

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This commit is contained in:
Julien BLACHE 2009-06-11 16:44:49 +02:00
parent 129ca8dfff
commit 07e22d8870
2 changed files with 103 additions and 0 deletions
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86
src/db.c
View File

@ -2546,6 +2546,92 @@ db_watch_cookie_known(uint32_t cookie)
#undef Q_TMPL
}
int
db_watch_enum_start(struct watch_enum *we)
{
#define Q_MATCH_TMPL "SELECT wd FROM inotify WHERE path LIKE '%q/%%';"
#define Q_COOKIE_TMPL "SELECT wd FROM inotify WHERE cookie = %" PRIi64 ";"
char *query;
int ret;
we->stmt = NULL;
if (we->match)
query = sqlite3_mprintf(Q_MATCH_TMPL, we->match);
else if (we->cookie != 0)
query = sqlite3_mprintf(Q_COOKIE_TMPL, we->cookie);
else
{
DPRINTF(E_LOG, L_DB, "Could not start enum, no parameter given\n");
return -1;
}
if (!query)
{
DPRINTF(E_LOG, L_DB, "Out of memory for query string\n");
return -1;
}
DPRINTF(E_DBG, L_DB, "Starting enum '%s'\n", query);
ret = sqlite3_prepare_v2(hdl, query, -1, &we->stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Could not prepare statement: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return -1;
}
sqlite3_free(query);
return 0;
#undef Q_MATCH_TMPL
#undef Q_COOKIE_TMPL
}
void
db_watch_enum_end(struct watch_enum *we)
{
if (!we->stmt)
return;
sqlite3_finalize(we->stmt);
we->stmt = NULL;
}
int
db_watch_enum_fetchwd(struct watch_enum *we, uint32_t *wd)
{
int ret;
*wd = 0;
if (!we->stmt)
{
DPRINTF(E_LOG, L_DB, "Watch enum not started!\n");
return -1;
}
ret = sqlite3_step(we->stmt);
if (ret == SQLITE_DONE)
{
DPRINTF(E_INFO, L_DB, "End of watch enum results\n");
return 0;
}
else if (ret != SQLITE_ROW)
{
DPRINTF(E_LOG, L_DB, "Could not step: %s\n", sqlite3_errmsg(hdl));
return -1;
}
*wd = (uint32_t)sqlite3_column_int(we->stmt, 0);
return 0;
}
int
db_perthread_init(void)

17
src/db.h
View File

@ -183,6 +183,14 @@ struct watch_info {
int libidx;
};
struct watch_enum {
uint32_t cookie;
char *match;
/* Private enum context, keep out */
sqlite3_stmt *stmt;
};
char *
db_escape_string(const char *str);
@ -320,6 +328,15 @@ db_watch_move_bycookie(uint32_t cookie, char *path);
int
db_watch_cookie_known(uint32_t cookie);
int
db_watch_enum_start(struct watch_enum *we);
void
db_watch_enum_end(struct watch_enum *we);
int
db_watch_enum_fetchwd(struct watch_enum *we, uint32_t *wd);
int
db_perthread_init(void);