source: MondoRescue/branches/2.2.5/mindi-busybox/procps/pidof.c@ 1765

/* vi: set sw=4 ts=4: */
/*
 * pidof implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
 */

#include "libbb.h"

enum {
    USE_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
    USE_FEATURE_PIDOF_OMIT(  OPTBIT_OMIT  ,)
    OPT_SINGLE = USE_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
    OPT_OMIT   = USE_FEATURE_PIDOF_OMIT(  (1<<OPTBIT_OMIT  )) + 0,
};

int pidof_main(int argc, char **argv);
int pidof_main(int argc, char **argv)
{
    unsigned first = 1;
    unsigned opt;
#if ENABLE_FEATURE_PIDOF_OMIT
    char ppid_str[sizeof(int)*3 + 1];
    llist_t *omits = NULL; /* list of pids to omit */
    opt_complementary = "o::";
#endif

    /* do unconditional option parsing */
    opt = getopt32(argv, ""
            USE_FEATURE_PIDOF_SINGLE ("s")
            USE_FEATURE_PIDOF_OMIT("o:", &omits));

#if ENABLE_FEATURE_PIDOF_OMIT
    /* fill omit list.  */
    {
        llist_t *omits_p = omits;
        while (omits_p) {
            /* are we asked to exclude the parent's process ID?  */
            if (strcmp(omits_p->data, "%PPID") == 0) {
                sprintf(ppid_str, "%u", (unsigned)getppid());
                omits_p->data = ppid_str;
            }
            omits_p = omits_p->link;
        }
    }
#endif
    /* Looks like everything is set to go.  */
    while (optind < argc) {
        pid_t *pidList;
        pid_t *pl;

        /* reverse the pidlist like GNU pidof does.  */
        pidList = pidlist_reverse(find_pid_by_name(argv[optind]));
        for (pl = pidList; *pl; pl++) {
#if ENABLE_FEATURE_PIDOF_OMIT
            if (opt & OPT_OMIT) {
                llist_t *omits_p = omits;
                while (omits_p) {
                    if (xatoul(omits_p->data) == *pl) {
                        goto omitting;
                    }
                    omits_p = omits_p->link;
                }
            }
#endif
            printf(" %u" + first, (unsigned)*pl);
            first = 0;
            if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE))
                break;
#if ENABLE_FEATURE_PIDOF_OMIT
 omitting: ;
#endif
        }
        free(pidList);
        optind++;
    }
    putchar('\n');

#if ENABLE_FEATURE_PIDOF_OMIT
    if (ENABLE_FEATURE_CLEAN_UP)
        llist_free(omits, NULL);
#endif
    return first; /* 1 (failure) - no processes found */
}