release/src/router/apcupsd/src/lib/apcfile.c

   1 /*
   2  * apcfile.c
   3  *
   4  * Files management.
   5  */
   6
   7 /*
   8  * Copyright (C) 1996-99 Andre M. Hedrick <andre@suse.com>
   9  * Copyright (C) 1999-2000 Riccardo Facchetti <riccardo@master.oasi.gpa.it>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of version 2 of the GNU General
  13  * Public License as published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public
  21  * License along with this program; if not, write to the Free
  22  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  23  * MA 02111-1307, USA.
  24  */
  25
  26 #include "apc.h"
  27
  28 /*
  29  * If this is a Windows machine, we do NOT create a pid file.
  30  * We prevent multiple copies of apcupsd from running by
  31  * ensuring that there is only one system tray entry for
  32  * apcupsd.
  33  */
  34
  35 /*
  36  * Create a file in `path'.  Used for nologin and powerfail
  37  * files.
  38  */
  39 int make_file(UPSINFO *ups, const char *path)
  40 {
  41    int makefd;
  42
  43    if ((makefd = open(path, O_CREAT | O_WRONLY, 0644)) >= 0) {
  44       close(makefd);
  45    } else {
  46       log_event(ups, LOG_ERR, "Unable to create %s: ERR=%s\n",
  47          path, strerror(errno));
  48    }
  49
  50    return makefd;
  51 }
  52
  53 /* Create the pid lock file. */
  54 const char *pidfile = APCPID;
  55 void make_pid_file(void)
  56 {
  57 #if !defined(HAVE_WIN32)
  58    pid_t pid = getpid();
  59    int pfd, len;
  60    char buf[100];
  61
  62    unlink(pidfile);
  63    if ((pfd = open(pidfile, O_CREAT | O_TRUNC | O_WRONLY, 0644)) >= 0) {
  64       len = asnprintf(buf, sizeof(buf), "%ld\n", (long)pid);
  65       write(pfd, buf, len);
  66       close(pfd);
  67    }
  68 #endif
  69 }