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tagfs.lc
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tagfs.lc
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#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
#include "params.h"
#include "types.h"
#include "log.h"
#include "search_fs.h"
#include "stage.h"
#include "tagdb.h"
#include "set_ops.h"
#include "path_util.h"
#include "subfs.h"
#include "sql.h"
/* configuration variables */
int c_log_level = -1;
char *c_db_file_name = NULL;
char *c_log_file_name = NULL;
char *c_data_prefix = NULL;
int c_do_logging = FALSE;
int do_drop_db = FALSE;
%(tagfs_operations
getattr
readdir
mkdir
create
symlink
readlink
unlink
rename
rmdir
write
read
truncate
open
chown
utimens
chmod);
void destroy_tagfs_data(struct tagfs_state *data)
{
static gboolean cleaned_up = FALSE;
if (!cleaned_up)
{
cleaned_up = TRUE;
TagDB *db = data->db;
Stage *stage = data->stage;
debug("SAVING TO DATABASE : %s", db->db_fname);
tagdb_save(db, db->db_fname);
tagdb_destroy(db);
stage_destroy(stage);
log_close();
g_free(data->copiesdir);
g_free(data->log_file);
g_free(data);
}
}
%(op destroy user_data)
{
%(log)
destroy_tagfs_data(user_data);
}
%(fuse_operations);
static GOptionEntry command_line_options[] =
{
{ "debug", 'g', 0, G_OPTION_ARG_INT, &c_log_level, "The default logging level", NULL },
{ "log-file", 'l', 0, G_OPTION_ARG_STRING, &c_log_file_name, "The log file", NULL },
{ "db-file", 'b', 0, G_OPTION_ARG_STRING, &c_db_file_name, "The database file", NULL },
{ "data-dir", 0, 0, G_OPTION_ARG_STRING, &c_data_prefix, "Location of the data directory", NULL },
{ "drop-db", 0, 0, G_OPTION_ARG_NONE, &do_drop_db, "Delete the entire database. Retains file content, but will be overwritten upon further use.", NULL},
{NULL},
};
void process_options (int *argc_ptr, char ***argv_ptr)
{
GError *error = NULL;
GOptionContext *context;
context = g_option_context_new("- mount a tagfs file system");
g_option_context_set_ignore_unknown_options(context, TRUE);
g_option_context_add_main_entries(context, command_line_options, NULL);
if (!g_option_context_parse(context, argc_ptr, argv_ptr, &error))
{
g_print("option parsing failed: %s\n", error->message);
exit(1);
}
g_option_context_free(context);
}
/* Eats a relative path and spits out one relative to the x */
char *absolutize(const char *cwd, char **path)
{
if (!g_path_is_absolute(*path))
{
char *tmp = *path;
*path = g_build_filename(cwd, *path, NULL);
g_free(tmp);
}
return *path;
}
int main (int argc, char **argv)
{
int fuse_stat = 0;
struct tagfs_state *tagfs_data = g_try_malloc(sizeof(struct tagfs_state));
char *cwd = g_get_current_dir();
if (!tagfs_data)
{
perror("Cannot alloc tagfs_data");
abort();
}
process_options(&argc, &argv);
char *prefix = (c_data_prefix != NULL)?g_strdup(c_data_prefix):g_build_filename(g_get_user_data_dir(), "tagfs", NULL);
/* absolutize prefix if necessary */
absolutize(cwd, &prefix);
if (mkdir(prefix, (mode_t) 0755) && errno != EEXIST)
{
perror("could not make data directory");
}
if (c_log_level >= 0)
{
tagfs_data->log_file = (c_log_file_name==NULL)?g_build_filename(prefix, "tagfs.log", NULL):g_strdup(c_log_file_name);
/* absolutize log_file if necessary */
absolutize(cwd, &tagfs_data->log_file);
log_open(tagfs_data->log_file, c_log_level);
}
char *db_fname = NULL;
if (c_db_file_name)
{
db_fname = g_strdup(c_db_file_name);
debug("cwd = %s", cwd);
absolutize(cwd, &db_fname);
}
else
{
debug("prefix = %s", prefix);
db_fname = g_build_filename(prefix, "tagfs.db", NULL);
}
tagfs_data->copiesdir = g_build_filename(prefix, "copies", NULL);
debug("cwd = %s", cwd);
if (mkdir(tagfs_data->copiesdir, (mode_t) 0755))
{
if (errno != EEXIST)
{
error("could not make copies directory");
fprintf(stderr, "could not make copies directory\n");
abort();
}
else if (do_drop_db)
{
DIR *d = opendir(tagfs_data->copiesdir);
struct dirent *de = NULL;
char path[PATH_MAX];
while ((de = readdir(d)) != NULL)
{
sprintf(path, "%s/%s", tagfs_data->copiesdir, de->d_name);
if (unlink(path) && !(strcmp(path, ".") == 0 || strcmp(path, "..") == 0))
{
warn("Couldn't remove a file %s from the copies directory", de->d_name);
}
}
closedir(d);
}
}
debug("argc = %d",argc);
debug("tagfs_data->copiesdir = \"%s\"", tagfs_data->copiesdir);
if (argc < 2)
{
error("Must provide mount point for %s");
fprintf(stderr, "Must provide mount point for %s\n", argv[0]);
abort();
}
for (int i = 0; i < argc; i++)
{
debug("argv[%d] = '%s'", i, argv[i]);
}
if (do_drop_db)
{
unlink(db_fname);
}
sqlite3* sqldb = sql_init(db_fname);
if (!sqldb)
{
fprintf(stderr, "Couldn't set up the database. Exiting.\n");
g_free(cwd);
abort();
}
tagfs_data->db = tagdb_new1(sqldb, 0);
if (!tagfs_data->db)
{
fprintf(stderr, "Couldn't set up the database. Exiting.\n");
g_free(cwd);
abort();
}
/*tagfs_data->rqm = query_result_manager_new();*/
debug("setting up the stage");
tagfs_data->stage = new_stage();
subfs_init();
//tagfs_data->search_results = new_search_list();
fprintf(stderr, "about to call fuse_main\n");
debug("entering fuse main");
fuse_stat = fuse_main(argc, argv, &%(operations_struct_name), tagfs_data);
fprintf(stderr, "fuse_main returned %d\n", fuse_stat);
debug("fuse_main returned %d", fuse_stat);
if (fuse_stat != 0)
{
error("fuse_main:\"%s\"", strerror(errno));
}
g_free(prefix);
g_free(cwd);
g_free(db_fname);
debug("leaving main");
return fuse_stat;
}