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/* This file is part of genrc
Copyryght (C) 2018 Sergey Poznyakoff
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
*/
#include "genrc.h"
typedef struct grecs_node *(*GRECS_PARSER_FUNC)(const char *, int);
struct config_pid_closure {
struct genrc_pid_closure generic;
char *filename;
char *fqrn;
GRECS_PARSER_FUNC parser;
};
static int
pid_config_get(GENRC_PID_CLOSURE *clos, PIDLIST *plist)
{
struct config_pid_closure *config_clos =
(struct config_pid_closure *)clos;
struct grecs_node *tree, *node;
pid_t pid;
grecs_parser_fun = config_clos->parser;
tree = grecs_parse(config_clos->filename);
if (!tree)
exit(1);
node = grecs_find_node(tree, config_clos->fqrn);
if (!node)
usage_error("%s: relation %s not found",
config_clos->filename,
config_clos->fqrn);
if (node->type != grecs_node_stmt)
usage_error("%s: relation %s is not a statement",
config_clos->filename,
config_clos->fqrn);
if (node->v.value->type != GRECS_TYPE_STRING)
usage_error("%s: relation %s is not a string",
config_clos->filename,
config_clos->fqrn);
pid = file_read_pid(node->v.value->v.string);
grecs_tree_free(tree);
if (pid == -1)
return -1;
if (pid > 0)
pidlist_add(plist, pid);
return 0;
}
struct langtab {
char const *lang_name;
GRECS_PARSER_FUNC lang_parser;
};
static struct langtab langtab[] = {
{ "GRECS", grecs_grecs_parser },
{ "META1", grecs_meta1_parser },
{ "BIND", grecs_bind_parser },
{ "DHCPD", grecs_dhcpd_parser },
{ "GIT", grecs_git_parser },
{ "PATH", grecs_path_parser },
{ NULL, NULL }
};
static GRECS_PARSER_FUNC
find_parser(const char *lang)
{
struct langtab *p;
for (p = langtab; p->lang_name; p++)
if (strcmp(p->lang_name, lang) == 0)
break;
return p->lang_parser;
}
GENRC_PID_CLOSURE *
genrc_pid_config_init(int argc, char **argv)
{
struct config_pid_closure *clos;
if (argc != 4)
usage_error("expected format: CONFIG:<LANG>:<FILE>:<FQRN>");
clos = xmalloc(sizeof(*clos));
clos->generic.pid = pid_config_get;
clos->parser = find_parser(argv[1]);
if (!clos->parser)
usage_error("%s: unsupported parser type", argv[1]);
clos->filename = xstrdup(argv[2]);
clos->fqrn = xstrdup(argv[3]);
return (GENRC_PID_CLOSURE *) clos;
}
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