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#define _GNU_SOURCE
#include "grok.h"
#include "grok_program.h"
#include "grok_config.h"
#include "conf.tab.h"
#include <unistd.h>
#include <getopt.h>
extern char *optarg; /* from unistd.h, getopt */
extern FILE *yyin; /* from conf.lex (flex provides this) */
static char *g_prog;
void usage() {
printf("Usage: %s [-d] <-f config_file>\n", g_prog);
printf(" -d (optional) Daemonize/background\n");
printf(" -f file (required) Use specified config file\n");
}
int main(int argc, char **argv) {
struct config c;
grok_collection_t *gcol = NULL;
int i = 0;
int opt = 0;
int want_daemon = 0;
char *config_file = NULL;
struct option options[] = {
{ "daemon", no_argument, NULL, 'd' },
{ "config", required_argument, NULL, 'f' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'v' },
{ 0, 0, 0, 0 }
};
g_prog = argv[0];
while ((opt = getopt_long_only(argc, argv, "vhdf:", options, &optind)) != -1) {
switch (opt) {
case 'd':
want_daemon = 1;
break;
case 'f':
config_file = strdup(optarg);
break;
case 'h':
usage();
return 0;
case 'v':
printf("grok %s\n", GROK_VERSION);
return 0;
default:
usage();
return 1;
}
}
if (config_file == NULL) {
fprintf(stderr, "No config file given.\n");
usage();
return 1;
}
yyin = fopen(config_file, "r");
free(config_file);
conf_init(&c);
i = yyparse(&c);
if (i != 0) {
fprintf(stderr, "Parsing error in config file\n");
return 1;
}
/* We want to background after parsing the config so we can check for syntax
* errors */
if (want_daemon && (daemon(0, 0) != 0)) {
perror("Error while daemonizing");
}
gcol = grok_collection_init();
for (i = 0; i < c.nprograms; i++) {
grok_collection_add(gcol, &(c.programs[i]));
}
grok_collection_loop(gcol);
return gcol->exit_code;
}
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