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/*
* Unix SMB/CIFS implementation.
* Performance Counter Daemon
*
* Copyright (C) Marcin Krzysztof Porwit 2005
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "perf.h"
extern sig_atomic_t keep_running;
void fatal(char *msg)
{
perror(msg);
exit(1);
}
void add_key_raw(TDB_CONTEXT *db, char *keystring, void *databuf, size_t datasize, int flags)
{
TDB_DATA key, data;
key.dptr = keystring;
key.dsize = strlen(keystring);
data.dptr = databuf;
data.dsize = datasize;
tdb_store(db, key, data, flags);
}
void add_key(TDB_CONTEXT *db, char *keystring, char *datastring, int flags)
{
TDB_DATA key, data;
key.dptr = keystring;
key.dsize = strlen(keystring);
data.dptr = datastring;
data.dsize = strlen(datastring);
tdb_store(db, key, data, flags);
}
void make_key(char *buf, int buflen, int key_part1, char *key_part2)
{
memset(buf, 0, buflen);
if(key_part2 != NULL)
sprintf(buf, "%d%s", key_part1, key_part2);
else
sprintf(buf, "%d", key_part1);
return;
}
void usage(char *progname)
{
fprintf(stderr, "Usage: %s [-d] [-f <file_path>].\n", progname);
fprintf(stderr, "\t-d: run as a daemon.\n");
fprintf(stderr, "\t-f <file_path>: path where the TDB files reside.\n");
fprintf(stderr, "\t\tDEFAULT is /var/lib/samba/perfmon\n");
exit(1);
}
void parse_flags(RuntimeSettings *rt, int argc, char **argv)
{
int flag;
while((flag = getopt(argc, argv, "df:")) != -1)
{
switch(flag)
{
case 'd':
{
rt->dflag = TRUE;
break;
}
case 'f':
{
memcpy(rt->dbDir, optarg, strlen(optarg));
break;
}
default:
{
usage(argv[0]);
}
}
}
return;
}
void setup_file_paths(RuntimeSettings *rt)
{
int status;
if(strlen(rt->dbDir) == 0)
{
/* No file path was passed in, use default */
sprintf(rt->dbDir, "/var/lib/samba/perfmon");
}
sprintf(rt->nameFile, "%s/names.tdb", rt->dbDir);
sprintf(rt->counterFile, "%s/data.tdb", rt->dbDir);
mkdir(rt->dbDir, 0755);
rt->cnames = tdb_open(rt->nameFile, 0, TDB_CLEAR_IF_FIRST, O_RDWR | O_CREAT, 0644);
rt->cdata = tdb_open(rt->counterFile, 0, TDB_CLEAR_IF_FIRST, O_RDWR | O_CREAT, 0644);
if(rt->cnames == NULL || rt->cdata == NULL)
{
perror("setup_file_paths");
exit(1);
}
return;
}
void sigterm_handler()
{
keep_running = FALSE;
return;
}
void daemonize(RuntimeSettings *rt)
{
pid_t pid;
int i;
int fd;
/* Check if we're already a daemon */
if(getppid() == 1)
return;
pid = fork();
if(pid < 0)
/* can't fork */
exit(1);
else if(pid > 0)
{
/* we're the parent */
tdb_close(rt->cnames);
tdb_close(rt->cdata);
exit(0);
}
/* get a new session */
if(setsid() == -1)
exit(2);
/* Change CWD */
chdir("/");
/* close file descriptors */
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
/* And reopen them as safe defaults */
fd = open("/dev/null", O_RDONLY);
if(fd != 0)
{
dup2(fd, 0);
close(fd);
}
fd = open("/dev/null", O_WRONLY);
if(fd != 1)
{
dup2(fd, 1);
close(fd);
}
fd = open("/dev/null", O_WRONLY);
if(fd != 2)
{
dup2(fd, 2);
close(fd);
}
/* handle signals */
signal(SIGINT, SIG_IGN);
signal(SIGHUP, SIG_IGN);
signal(SIGTERM, sigterm_handler);
return;
}
int get_counter_id(PERF_DATA_BLOCK *data)
{
data->counter_id += 2;
data->num_counters++;
return data->counter_id;
}
void init_perf_counter(PerfCounter *counter,
PerfCounter *parent,
unsigned int index,
char *name,
char *help,
int counter_type,
int record_type)
{
counter->index = index;
memcpy(counter->name, name, strlen(name));
memcpy(counter->help, help, strlen(help));
counter->counter_type = counter_type;
counter->record_type = record_type;
switch(record_type)
{
case PERF_OBJECT:
sprintf(counter->relationships, "p");
break;
case PERF_COUNTER:
sprintf(counter->relationships, "c[%d]", parent->index);
break;
case PERF_INSTANCE:
sprintf(counter->relationships, "i[%d]", parent->index);
break;
default:
perror("init_perf_counter: unknown record type");
exit(1);
}
return;
}
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