/* $Id: pid.c,v 1.6 2004/03/19 06:37:47 reinelt Exp $ * * PID file handling * * Copyright 1999, 2000 Michael Reinelt * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: pid.c,v $ * Revision 1.6 2004/03/19 06:37:47 reinelt * asynchronous thread handling started * * Revision 1.5 2004/03/03 04:44:16 reinelt * changes (cosmetics?) to the big patch from Martin * hash patch un-applied * * Revision 1.4 2004/03/03 03:47:04 reinelt * big patch from Martin Hejl: * - use qprintf() where appropriate * - save CPU cycles on gettimeofday() * - add quit() functions to free allocated memory * - fixed lots of memory leaks * * Revision 1.3 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.2 2003/10/05 17:58:50 reinelt * libtool junk; copyright messages cleaned up * * Revision 1.1 2003/08/08 08:05:23 reinelt * added PID file handling * */ /* * exported functions: * * int pid_init (const char *pidfile) * returns 0 if PID file could be successfully created * returns PID of an already running process * returns -1 in case of an error * int pid_exit (const char *pidfile) * returns 0 if PID file could be successfully deleted * otherwise returns error from unlink() call * */ #include "config.h" #include #include #include #include #include #include #include #include #include #include "debug.h" #include "pid.h" #include "qprintf.h" #ifdef WITH_DMALLOC #include #endif int pid_init (const char *pidfile) { char tmpfile[256]; char buffer[16]; int fd, len, pid; qprintf(tmpfile, sizeof(tmpfile), "%s.%s", pidfile, "XXXXXX"); if ((fd=mkstemp(tmpfile))==-1) { error ("mkstemp(%s) failed: %s", tmpfile, strerror(errno)); return -1; } if (fchmod(fd,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)==-1) { error ("fchmod(%s) failed: %s", tmpfile, strerror(errno)); close(fd); unlink(tmpfile); return -1; } qprintf(buffer, sizeof(buffer), "%d\n", (int)getpid()); if (write(fd, buffer, strlen(buffer))!=strlen(buffer)) { error ("write(%s) failed: %s", tmpfile, strerror(errno)); close(fd); unlink(tmpfile); return -1; } close (fd); while (link(tmpfile, pidfile)==-1) { if (errno!=EEXIST) { error ("link(%s, %s) failed: %s", tmpfile, pidfile, strerror(errno)); unlink(tmpfile); return -1; } if ((fd=open(pidfile, O_RDONLY))==-1) { if (errno==ENOENT) continue; // pidfile disappared error ("open(%s) failed: %s", pidfile, strerror(errno)); unlink (tmpfile); return -1; } len=read(fd, buffer, sizeof(buffer)-1); if (len<0) { error ("read(%s) failed: %s", pidfile, strerror(errno)); unlink (tmpfile); return -1; } buffer[len]='\0'; if (sscanf(buffer, "%d", &pid)!=1 || pid==0) { error ("scan(%s) failed.", pidfile); unlink (tmpfile); return -1; } if (pid==getpid()) { error ("%s already locked by us. uh-oh...", pidfile); unlink(tmpfile); return 0; } if ((kill(pid, 0)==-1) && errno==ESRCH) { error ("removing stale PID file %s", pidfile); if (unlink(pidfile)==-1 && errno!=ENOENT) { error ("unlink(%s) failed: %s", pidfile, strerror(errno)); unlink(tmpfile); return pid; } continue; } unlink (tmpfile); return pid; } unlink (tmpfile); return 0; } int pid_exit (const char *pidfile) { return unlink(pidfile); } color: #ffffc0; padding: 0 5px 0 5px; } .highlight .hll { background-color: #ffffcc } .highlight .c { color: #888888 } /* Comment */ .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */ .highlight .k { color: #008800; font-weight: bold } /* Keyword */ .highlight .ch { color: #888888 } /* Comment.Hashbang */ .highlight .cm { color: #888888 } /* Comment.Multiline */ .highlight .cp { color: #cc0000; 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/* $Id$
 * $URL$
 *
 * config file stuff
 *
 * Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
 * Copyright (C) 2004, 2009 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef _CFG_H_
#define _CFG_H_

int cfg_init(const char *file);
char *cfg_source(void);
int cfg_cmd(const char *arg);
char *cfg_list(const char *section);
int cfg_rename(const char *section, const char *old, const char *new);
char *cfg_get_raw(const char *section, const char *key, const char *defval);
char *cfg_get(const char *section, const char *key, const char *defval);
int cfg_number(const char *section, const char *key, const int defval, const int min, const int max, int *value);
int cfg_exit(void);

#endif