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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"

struct genrc_pid_source {
	char *name;
	GENRC_PID_CLOSURE *(*init)(int argc, char **argv);
};

struct genrc_pid_source sourcetab[] = {
	{ "FILE",   genrc_pid_file_init },
	{ "CONFIG", genrc_pid_config_init },
	{ "GREP",   genrc_pid_grep_init },
	{ "PROC",   genrc_pid_proc_init },
	{ "PS",     genrc_pid_ps_init },
	{ NULL }
};

GENRC_PID_CLOSURE *
get_pid_closure(char const *str)
{
	struct genrc_pid_source *s;
	struct wordsplit ws;
	GENRC_PID_CLOSURE *pc;
	
	ws.ws_error = genrc_error;
	ws.ws_delim = ":";
	if (wordsplit(str, &ws, 
		      WRDSF_NOCMD|WRDSF_NOVAR|WRDSF_QUOTE|
		      WRDSF_DELIM|WRDSF_ENOMEMABRT|WRDSF_SHOWERR|WRDSF_ERROR))
		exit(1);

	if (ws.ws_wordc == 0)
		usage_error("GENRC_PID_FROM argument is empty");
	for (s = sourcetab; ; s++) {
		if (!s->name)
			usage_error("%s: unsupported PID source", str);
		if (strcmp(s->name, ws.ws_wordv[0]) == 0)
			break;
	}
	pc = s->init(ws.ws_wordc, ws.ws_wordv);
	if (!pc)
		exit(1);
	pc->name = xstrdup(str);
	return pc;
}

int
get_pid_list(GENRC_PID_CLOSURE *clos, PIDLIST *plist)
{
	pidlist_clear(plist);
	return clos->pid(clos, plist);
}

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