source: projects/initscripts/tags/initscripts-8.91.3/src/netreport.c @ 1108

/*
 * Copyright (c) 1997-2002 Red Hat, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 *
 */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

/* this will be running setgid root, so be careful! */

static void
usage(void) {
    fprintf(stderr, "usage: netreport [-r]\n");
    exit(1);
}

#define ADD 1
#define DEL 0
int main(int argc, char ** argv) {
    int action = ADD;
    /* more than long enough for "/var/run/netreport/<pid>\0" */
    char netreport_name[64];
    int  netreport_file;

    if (argc > 2) {
        usage();
    }

    if (argc > 1) {
          if (argc == 2 && strcmp(argv[1], "-r") == 0) {
                  action = DEL;
          } else {
                  usage();
          }
    }

    snprintf(netreport_name, sizeof(netreport_name),
             "/var/run/netreport/%d", getppid());
    if (action == ADD) {
        netreport_file = open(netreport_name,
                              O_EXCL|O_CREAT|O_WRONLY|O_TRUNC|O_NOFOLLOW, 0);
        if (netreport_file == -1) {
            if (errno != EEXIST) {
                perror("Could not create netreport file");
                exit (1);
            }
        } else {
            close(netreport_file);
        }
    } else {
        /* ignore errors; not much we can do, won't hurt anything */
        unlink(netreport_name);
    }

    return 0;
}