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boinc/sched/file_deleter.C

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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// file_deleter: deletes files that are no longer needed
#include <cstring>
#include <cstdlib>
#include <ctime>
#include <unistd.h>
#include <errno.h>
#include "boinc_db.h"
#include "parse.h"
#include "util.h"
#include "filesys.h"
#include "sched_config.h"
#include "sched_util.h"
#include "sched_msgs.h"
#define LOCKFILE "file_deleter.out"
#define PIDFILE "file_deleter.pid"
#define SLEEP_INTERVAL 5
SCHED_CONFIG config;
// David -- not sure what the previous code was meant to do, since dir_hier_path
// always returns 0 if the last argument (eg, missing below) argument is set to
// false.
//
int get_file_path(char *buf, char* upload_dir, int fanout, char* path) {
dir_hier_path(buf, upload_dir, fanout, true, path);
if (boinc_file_exists(path))
return 0;
// TODO: get rid of the old hash in about 3/2005
//
dir_hier_path(buf, upload_dir, fanout, false, path);
if (boinc_file_exists(path))
return 0;
return 1;
}
int wu_delete_files(WORKUNIT& wu) {
char* p;
char filename[256], pathname[256], buf[LARGE_BLOB_SIZE];
bool no_delete=false;
int count_deleted = 0, retval;
safe_strcpy(buf, wu.xml_doc);
p = strtok(buf, "\n");
strcpy(filename, "");
while (p) {
if (parse_str(p, "<name>", filename, sizeof(filename))) {
} else if (match_tag(p, "<file_info>")) {
no_delete = false;
strcpy(filename, "");
} else if (match_tag(p, "<no_delete/>")) {
no_delete = true;
} else if (match_tag(p, "</file_info>")) {
if (!no_delete) {
retval=get_file_path(filename, config.download_dir, config.uldl_dir_fanout,
pathname
);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL, "[%s] dir_hier_path: %d\n", wu.name, retval);
} else {
log_messages.printf(SCHED_MSG_LOG::NORMAL, "[%s] deleting download/%s\n", wu.name, filename);
retval = unlink(pathname);
if (retval && strlen(config.download_dir_alt)) {
sprintf(pathname, "%s/%s", config.download_dir_alt, filename);
unlink(pathname);
}
++count_deleted;
}
}
}
p = strtok(0, "\n");
}
log_messages.printf(SCHED_MSG_LOG::DEBUG, "[%s] deleted %d file(s)\n", wu.name, count_deleted);
return 0;
}
int result_delete_files(RESULT& result) {
char* p;
char filename[256], pathname[256], buf[LARGE_BLOB_SIZE];
bool no_delete=false;
int count_deleted = 0, retval;
safe_strcpy(buf, result.xml_doc_in);
p = strtok(buf,"\n");
while (p) {
if (parse_str(p, "<name>", filename, sizeof(filename))) {
} else if (match_tag(p, "<file_info>")) {
no_delete = false;
strcpy(filename, "");
} else if (match_tag(p, "<no_delete/>")) {
no_delete = true;
} else if (match_tag(p, "</file_info>")) {
if (!no_delete) {
retval=get_file_path(filename, config.upload_dir, config.uldl_dir_fanout,
pathname
);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL,
"[%s] dir_hier_path: %d\n", result.name, retval
);
} else {
retval = unlink(pathname);
++count_deleted;
log_messages.printf(SCHED_MSG_LOG::NORMAL,
"[%s] unlinked %s; retval %d %s\n",
result.name, filename, retval, (retval && errno)?strerror(errno):""
);
}
}
}
p = strtok(0, "\n");
}
log_messages.printf(SCHED_MSG_LOG::DEBUG,
"[%s] deleted %d file(s)\n", result.name, count_deleted
);
return 0;
}
// set by corresponding command line arguments.
static bool preserve_wu_files=false;
static bool preserve_result_files=false;
// return nonzero if did anything
//
bool do_pass() {
DB_WORKUNIT wu;
DB_RESULT result;
bool did_something = false;
char buf[256];
int retval;
check_stop_daemons();
sprintf(buf, "where file_delete_state=%d limit 1000", FILE_DELETE_READY);
while (!wu.enumerate(buf)) {
did_something = true;
if (!preserve_wu_files) {
wu_delete_files(wu);
}
wu.file_delete_state = FILE_DELETE_DONE;
sprintf(buf, "file_delete_state=%d", wu.file_delete_state);
retval= wu.update_field(buf);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL,
"[%s] workunit failed to update file_delete_state with %d\n",
wu.name, retval
);
}
}
sprintf(buf, "where file_delete_state=%d limit 1000", FILE_DELETE_READY);
while (!result.enumerate(buf)) {
did_something = true;
if (!preserve_result_files) {
result_delete_files(result);
}
result.file_delete_state = FILE_DELETE_DONE;
sprintf(buf, "file_delete_state=%d", result.file_delete_state);
retval= result.update_field(buf);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL,
"[%s] result failed to update file_delete_state with %d\n",
result.name, retval
);
}
}
return did_something;
}
int main(int argc, char** argv) {
int retval;
bool asynch = false, one_pass = false;
int i;
check_stop_daemons();
for (i=1; i<argc; i++) {
if (!strcmp(argv[i], "-asynch")) {
asynch = true;
} else if (!strcmp(argv[i], "-one_pass")) {
one_pass = true;
} else if (!strcmp(argv[i], "-preserve_wu_files")) {
// This option is primarily for testing.
// If enabled, the file_deleter will function 'normally'
// and will update the database,
// but will not actually delete the workunit input files.
// It's equivalent to setting <no_delete/>
// for all workunit input files.
//
preserve_wu_files = true;
} else if (!strcmp(argv[i], "-preserve_result_files")) {
// This option is primarily for testing.
// If enabled, the file_deleter will function 'normally'
// and will update the database,
// but will not actually delete the result output files.
// It's equivalent to setting <no_delete/>
// for all result output files.
//
preserve_result_files = true;
} else if (!strcmp(argv[i], "-d")) {
log_messages.set_debug_level(atoi(argv[++i]));
} else {
log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Unrecognized arg: %s\n", argv[i]);
}
}
retval = config.parse_file("..");
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Can't parse config file\n");
exit(1);
}
if (asynch) {
if (fork()) {
exit(0);
}
}
// // Call lock_file after fork(), because file locks are not always inherited
// if (lock_file(LOCKFILE)) {
// log_messages.printf(SCHED_MSG_LOG::NORMAL, "Another copy of file deleter is running\n");
// exit(1);
// }
// write_pid_file(PIDFILE);
log_messages.printf(SCHED_MSG_LOG::NORMAL, "Starting\n");
retval = boinc_db.open(config.db_name, config.db_host, config.db_user, config.db_passwd);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't open DB\n");
exit(1);
}
install_stop_signal_handler();
if (one_pass) {
do_pass();
} else {
while (1) {
if (!do_pass()) sleep(SLEEP_INTERVAL);
}
}
}
const char *BOINC_RCSID_bd0d4938a6 = "$Id$";
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