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/*
Copyright (C) 2008, 2009, 2010 Jiri Olsa <olsajiri@gmail.com>
This file is part of the latrace.
The latrace 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 3 of the License, or
(at your option) any later version.
The latrace 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 the latrace (file COPYING). If not, see
<http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include "config.h"
static void usage() NORETURN;
static void usage()
{
printf("usage: latrace-ctl [-d] config\n\n");
printf(" -d <0/1> - disable/enable auditing\n");
printf("\n");
exit(1);
}
static int mmap_config(struct lt_config_ctl *cfg)
{
struct lt_config_shared* sh;
int page = sysconf(_SC_PAGE_SIZE);
int fd, len;
if (-1 == (fd = open(cfg->config, O_RDWR))) {
perror("open failed");
return -1;
}
/* align the shared config length */
len = sizeof(struct lt_config_shared);
len = (len + page) & ~(page - 1);
sh = mmap(NULL, len,
PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);
if ((void *) -1 == sh) {
PRINT_VERBOSE(cfg, 1,
"mmap failed: %s\n", strerror(errno));
return -1;
}
cfg->sh = sh;
return 0;
}
static int config_ctl(struct lt_config_ctl *cfg, int argc, char **argv)
{
memset(cfg, 0x0, sizeof(*cfg));
while (1) {
int c;
int option_index = 0;
static struct option long_options[] = {
{"disable", required_argument, 0, 'd'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
c = getopt_long(argc, argv, "+d:",
long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 'd':
cfg->set_disabled = 1;
cfg->disabled = atoi(optarg);
break;
}; /* switch */
} /* while */
if (optind < argc)
cfg->config = argv[optind];
else {
printf("failed: no config specified\n");
usage();
}
return 0;
}
int main_ctl(int argc, char **argv)
{
struct lt_config_ctl cfg;
if (config_ctl(&cfg, argc, argv))
return -1;
if (mmap_config(&cfg))
return -1;
printf("controling config %s\n", cfg.config);
if (cfg.set_disabled) {
printf(" -> disabled = %d\n", cfg.disabled);
lt_sh(&cfg, disabled) = cfg.disabled;
}
return 0;
}
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