dnl $Id$ dnl $URL$ dnl Curses detection: Munged from Midnight Commander's configure.in dnl dnl What it does: dnl ============= dnl dnl - Determine which version of curses is installed on your system dnl and set the -I/-L/-l compiler entries and add a few preprocessor dnl symbols dnl - Do an AC_SUBST on the CURSES_INCLUDEDIR and CURSES_LIBS so that dnl @CURSES_INCLUDEDIR@ and @CURSES_LIBS@ will be available in dnl Makefile.in's dnl - Modify the following configure variables (these are the only dnl curses.m4 variables you can access from within configure.in) dnl CURSES_INCLUDEDIR - contains -I's and possibly -DRENAMED_CURSES if dnl an ncurses.h that's been renamed to curses.h dnl is found. dnl CURSES_LIBS - sets -L and -l's appropriately dnl CFLAGS - if --with-sco, add -D_SVID3 dnl has_curses - exports result of tests to rest of configure dnl dnl Usage: dnl ====== dnl 1) Add lines indicated below to acconfig.h dnl 2) call AC_CHECK_CURSES after AC_PROG_CC in your configure.in dnl 3) Instead of #include you should use the following to dnl properly locate ncurses or curses header file dnl dnl #if defined(USE_NCURSES) && !defined(RENAMED_NCURSES) dnl #include dnl #else dnl #include dnl #endif dnl dnl 4) Make sure to add @CURSES_INCLUDEDIR@ to your preprocessor flags dnl 5) Make sure to add @CURSES_LIBS@ to your linker flags or LIBS dnl dnl Notes with automake: dnl - call AM_CONDITIONAL(HAS_CURSES, test "$has_curses" = true) from dnl configure.in dnl - your Makefile.am can look something like this dnl ----------------------------------------------- dnl INCLUDES= blah blah blah $(CURSES_INCLUDEDIR) dnl if HAS_CURSES dnl CURSES_TARGETS=name_of_curses_prog dnl endif dnl bin_PROGRAMS = other_programs $(CURSES_TARGETS) dnl other_programs_SOURCES = blah blah blah dnl name_of_curses_prog_SOURCES = blah blah blah dnl other_programs_LDADD = blah dnl name_of_curses_prog_LDADD = blah $(CURSES_LIBS) dnl ----------------------------------------------- dnl dnl dnl The following lines should be added to acconfig.h: dnl ================================================== dnl dnl /*=== Curses version detection defines ===*/ dnl /* Found some version of curses that we're going to use */ dnl #undef HAS_CURSES dnl dnl /* Use SunOS SysV curses? */ dnl #undef USE_SUNOS_CURSES dnl dnl /* Use old BSD curses - not used right now */ dnl #undef USE_BSD_CURSES dnl dnl /* Use SystemV curses? */ dnl #undef USE_SYSV_CURSES dnl dnl /* Use Ncurses? */ dnl #undef USE_NCURSES dnl dnl /* If you Curses does not have color define this one */ dnl #undef NO_COLOR_CURSES dnl dnl /* Define if you want to turn on SCO-specific code */ dnl #undef SCO_FLAVOR dnl dnl /* Set to reflect version of ncurses * dnl * 0 = version 1.* dnl * 1 = version 1.9.9g dnl * 2 = version 4.0/4.1 */ dnl #undef NCURSES_970530 dnl dnl /*=== End new stuff for acconfig.h ===*/ dnl AC_DEFUN([AC_CHECK_CURSES],[ search_ncurses=true screen_manager="" has_curses=false CFLAGS=${CFLAGS--O} AC_SUBST(CURSES_LIBS) AC_SUBST(CURSES_INCLUDEDIR) AC_ARG_WITH(sco, [ --with-sco Use this to turn on SCO-specific code],[ if test x$withval = xyes; then AC_DEFINE(SCO_FLAVOR,1,[Define if you want to turn on SCO-specific code]) CFLAGS="$CFLAGS -D_SVID3" fi ]) AC_ARG_WITH(sunos-curses, [ --with-sunos-curses Used to force SunOS 4.x curses],[ if test x$withval = xyes; then AC_USE_SUNOS_CURSES fi ]) AC_ARG_WITH(osf1-curses, [ --with-osf1-curses Used to force OSF/1 curses],[ if test x$withval = xyes; then AC_USE_OSF1_CURSES fi ]) AC_ARG_WITH(vcurses, [ --with-vcurses[=incdir] Used to force SysV curses], if test x$withval != xyes; then CURSES_INCLUDEDIR="-I$withval" fi AC_USE_SYSV_CURSES ) AC_ARG_WITH(ncurses, [ --with-ncurses[=dir] Compile with ncurses/locate base dir], if test x$withval = xno ; then search_ncurses=false elif test x$withval != xyes ; then CURSES_LIBS="$LIBS -L$withval/lib -lncurses" CURSES_INCLUDEDIR="-I$withval/include" search_ncurses=false screen_manager="ncurses" AC_DEFINE(USE_NCURSES,1,[Use Ncurses?]) AC_DEFINE(HAS_CURSES,1,[Found some version of curses that we're going to use]) has_curses=true fi ) if $search_ncurses then AC_SEARCH_NCURSES() fi ]) AC_DEFUN([AC_USE_SUNOS_CURSES], [ search_ncurses=false screen_manager="SunOS 4.x /usr/5include curses" AC_MSG_RESULT(Using SunOS 4.x /usr/5include curses) AC_DEFINE(USE_SUNOS_CURSES,1,[Use SunOS SysV curses?]) AC_DEFINE(HAS_CURSES,1,[Found some version of curses that we're going to use]) has_curses=true AC_DEFINE(NO_COLOR_CURSES,1,[If you Curses does not have color define this one]) AC_DEFINE(USE_SYSV_CURSES,1,[Use SystemV curses?]) CURSES_INCLUDEDIR="-I/usr/5include" CURSES_LIBS="/usr/5lib/libcurses.a /usr/5lib/libtermcap.a" AC_MSG_RESULT(Please note that some screen refreshs may fail) ]) AC_DEFUN([AC_USE_OSF1_CURSES], [ AC_MSG_RESULT(Using OSF1 curses) search_ncurses=false screen_manager="OSF1 curses" AC_DEFINE(HAS_CURSES,1,[Found some version of curses that we're going to use]) has_curses=true AC_DEFINE(NO_COLOR_CURSES,1,[If you Curses does not have color define this one]) AC_DEFINE(USE_SYSV_CURSES,1,[Use SystemV curses?]) CURSES_LIBS="-lcurses" ]) AC_DEFUN([AC_USE_SYSV_CURSES], [ AC_MSG_RESULT(Using SysV curses) AC_DEFINE(HAS_CURSES,1,[Found some version of curses that we're going to use]) has_curses=true AC_DEFINE(USE_SYSV_CURSES,1,[Use SystemV curses?]) search_ncurses=false screen_manager="SysV/curses" CURSES_LIBS="-lcurses" ]) dnl AC_ARG_WITH(bsd-curses, dnl [--with-bsd-curses Used to compile with bsd curses, not very fancy], dnl search_ncurses=false dnl screen_manager="Ultrix/cursesX" dnl if test $system = ULTRIX dnl then dnl THIS_CURSES=cursesX dnl else dnl THIS_CURSES=curses dnl fi dnl dnl CURSES_LIBS="-l$THIS_CURSES -ltermcap" dnl AC_DEFINE(HAS_CURSES,1,[Found some version of curses that we're going to use]) dnl has_curses=true dnl AC_DEFINE(USE_BSD_CURSES,1,[Use old BSD curses - not used right now]) dnl AC_MSG_RESULT(Please note that some screen refreshs may fail) dnl AC_MSG_WARN(Use of the bsdcurses extension has some) dnl AC_MSG_WARN(display/input problems.) dnl AC_MSG_WARN(Reconsider using xcurses) dnl) 
/* $Id: pid.c,v 1.10 2005/05/08 04:32:44 reinelt Exp $
 *
 * PID file handling
 *
 * Copyright (C) 1999, 2000 Michael Reinelt <reinelt@eunet.at>
 *
 * 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 1.10  2005/05/08 04:32:44  reinelt
 * CodingStyle added and applied
 *
 * Revision 1.9  2005/01/18 06:30:23  reinelt
 * added (C) to all copyright statements
 *
 * Revision 1.8  2004/06/26 12:04:59  reinelt
 *
 * uh-oh... the last CVS log message messed up things a lot...
 *
 * Revision 1.7  2004/06/26 09:27:21  reinelt
 *
 * added '-W' to CFLAGS
 * changed all C++ comments to C ones
 * cleaned up a lot of signed/unsigned mistakes
 *
 * 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "debug.h"
#include "pid.h"
#include "qprintf.h"

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif


int pid_init(const char *pidfile)
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-02 02:59:28 +0000
]; 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()); len = strlen(buffer); if (write(fd, buffer, len) != len) { 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); }