busybox

/* vi: set sw=4 ts=4: */

/*

 * pidof implementation for busybox

 *

 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>

 *

 * Licensed under the GPL v2, see the file LICENSE in this tarball.

 */

​

​

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <unistd.h>

#include <signal.h>

#include <ctype.h>

#include <string.h>

#include <sys/types.h>

#include <unistd.h>

#include "busybox.h"

​

#if ENABLE_FEATURE_PIDOF_SINGLE

#define _SINGLE_COMPL(a) a

#define SINGLE (1<<0)

#else

#define _SINGLE_COMPL(a)

#define SINGLE (0)

#endif

​

#if ENABLE_FEATURE_PIDOF_OMIT

#define _OMIT_COMPL(a) a

#define _OMIT(a) ,a

#if ENABLE_FEATURE_PIDOF_SINGLE

#define OMIT (1<<1)

#else

#define OMIT (1<<0)

#endif

#else

#define _OMIT_COMPL(a) ""

#define _OMIT(a)

#define OMIT (0)

#define omitted (0)

#endif

​

extern int pidof_main(int argc, char **argv)

{

    unsigned n = 0;

    unsigned fail = 1;

    unsigned long int opt;

#if ENABLE_FEATURE_PIDOF_OMIT

    llist_t *omits = NULL; /* list of pids to omit */

    bb_opt_complementally = _OMIT_COMPL("o::");

#endif

​

    /* do unconditional option parsing */

    opt = bb_getopt_ulflags(argc, argv,

                    _SINGLE_COMPL("s") _OMIT_COMPL("o:")

                    _OMIT(&omits));

​

#if ENABLE_FEATURE_PIDOF_OMIT

    /* fill omit list.  */

    {

        char getppid_str[32];