yan/archived-lcd4linux
1
0
Fork 0
mirror of https://github.com/netfun2000/lcd4linux.git synced 2026-02-27 09:44:34 +08:00
Code Issues Packages Projects Releases Wiki Activity

[lcd4linux @ 2000-04-07 05:42:20 by reinelt]

Browse Source 
UUCP style lockfiles for the serial port

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@41 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
This commit is contained in:
reinelt
2000-04-07 05:42:20 +00:00
parent ef1af83c23
commit a3e3fa4aaf
6 changed files with 267 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Makefile.am
+1
View File
@@ -14,6 +14,7 @@ endif
lcd4linux_SOURCES = \
lcd4linux.c \
cfg.c cfg.h \
lock.c lock.h \
parser.c parser.h \
processor.c processor.h \
system.c system.h \
Makefile.in
+6 -6
View File
@@ -73,7 +73,7 @@ AM_CFLAGS = $(X_CFLAGS) -Wall
lcd4linux_LDFLAGS = $(X_LIBS)
@WITH_X_TRUE@lcd4linux_LDADD = -lX11
lcd4linux_SOURCES = lcd4linux.c cfg.c cfg.h parser.c parser.h processor.c processor.h system.c system.h isdn.c isdn.h filter.c filter.h display.c display.h pixmap.c pixmap.h fontmap.c fontmap.h Skeleton.c MatrixOrbital.c Raster.c XWindow.c
lcd4linux_SOURCES = lcd4linux.c cfg.c cfg.h lock.c lock.h parser.c parser.h processor.c processor.h system.c system.h isdn.c isdn.h filter.c filter.h display.c display.h pixmap.c pixmap.h fontmap.c fontmap.h Skeleton.c MatrixOrbital.c Raster.c XWindow.c
ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
@@ -89,9 +89,9 @@ X_CFLAGS = @X_CFLAGS@
X_LIBS = @X_LIBS@
X_EXTRA_LIBS = @X_EXTRA_LIBS@
X_PRE_LIBS = @X_PRE_LIBS@
lcd4linux_OBJECTS = lcd4linux.o cfg.o parser.o processor.o system.o \
isdn.o filter.o display.o pixmap.o fontmap.o Skeleton.o MatrixOrbital.o \
Raster.o XWindow.o
lcd4linux_OBJECTS = lcd4linux.o cfg.o lock.o parser.o processor.o \
system.o isdn.o filter.o display.o pixmap.o fontmap.o Skeleton.o \
MatrixOrbital.o Raster.o XWindow.o
@WITH_X_TRUE@lcd4linux_DEPENDENCIES =
CFLAGS = @CFLAGS@
COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
@@ -107,8 +107,8 @@ TAR = tar
GZIP_ENV = --best
DEP_FILES = .deps/MatrixOrbital.P .deps/Raster.P .deps/Skeleton.P \
.deps/XWindow.P .deps/cfg.P .deps/display.P .deps/filter.P \
.deps/fontmap.P .deps/isdn.P .deps/lcd4linux.P .deps/parser.P \
.deps/pixmap.P .deps/processor.P .deps/system.P
.deps/fontmap.P .deps/isdn.P .deps/lcd4linux.P .deps/lock.P \
.deps/parser.P .deps/pixmap.P .deps/processor.P .deps/system.P
SOURCES = $(lcd4linux_SOURCES)
OBJECTS = $(lcd4linux_OBJECTS)
MatrixOrbital.c
+32 -4
View File
@@ -1,4 +1,4 @@
/* $Id: MatrixOrbital.c,v 1.12 2000/03/26 18:46:28 reinelt Exp $
/* $Id: MatrixOrbital.c,v 1.13 2000/04/07 05:42:20 reinelt Exp $
*
* driver for Matrix Orbital serial display modules
*
@@ -20,6 +20,10 @@
*
*
* $Log: MatrixOrbital.c,v $
* Revision 1.13 2000/04/07 05:42:20 reinelt
*
* UUCP style lockfiles for the serial port
*
* Revision 1.12 2000/03/26 18:46:28 reinelt
*
* bug in pixmap.c that leaded to empty bars fixed
@@ -76,13 +80,15 @@
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <termios.h>
#include <fcntl.h>
#include "cfg.h"
#include "lock.h"
#include "display.h"
#define SPEED 19200
@@ -122,8 +128,16 @@ static SEGMENT Segment[128] = {{ len1:0, len2:0, type:255, used:0, ascii:32
static int MO_open (void)
{
int fd;
pid_t pid;
struct termios portset;
if ((pid=lock_port(Port))!=0) {
if (pid==-1)
fprintf (stderr, "MatrixOrbital: port %s could not be locked\n", Port);
else
fprintf (stderr, "MatrixOrbital: port %s is locked by process %d\n", Port, pid);
return -1;
}
fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd==-1) {
fprintf (stderr, "MatrixOrbital: open(%s) failed: %s\n", Port, strerror(errno));
@@ -349,6 +363,8 @@ int MO_clear (void)
return 0;
}
static void MO_quit (int signal); //forward decvlaration
int MO_init (LCD *Self)
{
char *port;
@@ -391,6 +407,10 @@ int MO_init (LCD *Self)
Device=MO_open();
if (Device==-1) return -1;
signal(SIGINT, MO_quit);
signal(SIGQUIT, MO_quit);
signal(SIGTERM, MO_quit);
MO_clear();
MO_contrast();
@@ -522,6 +542,14 @@ int MO_flush (void)
return 0;
}
static void MO_quit (int signal)
{
MO_clear();
MO_flush();
close (Device);
unlock_port(Port);
exit (0);
}
LCD MatrixOrbital[] = {
{ "LCD0821", 2, 8, XRES, YRES, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
lcd4linux.c
+32 -8
View File
@@ -1,4 +1,4 @@
/* $Id: lcd4linux.c,v 1.17 2000/04/03 17:31:52 reinelt Exp $
/* $Id: lcd4linux.c,v 1.18 2000/04/07 05:42:20 reinelt Exp $
*
* LCD4Linux
*
@@ -20,6 +20,10 @@
*
*
* $Log: lcd4linux.c,v $
* Revision 1.18 2000/04/07 05:42:20 reinelt
*
* UUCP style lockfiles for the serial port
*
* Revision 1.17 2000/04/03 17:31:52 reinelt
*
* suppress welcome message if display is smaller than 20x2
@@ -120,11 +124,35 @@ static void usage(void)
printf ("usage: lcd4linux [-h] [-l] [-c key=value] [-f config-file] [-o output-file]\n");
}
static int hello (void)
{
int x, y;
lcd_query (&y, &x, NULL, NULL, NULL);
if (x>=20) {
lcd_put (1, 1, "* LCD4Linux V" VERSION " *");
lcd_put (2, 1, " (c) 2000 M.Reinelt");
} else if (x >=16) {
lcd_put (1, 1, "LCD4Linux " VERSION);
lcd_put (2, 1, "(c) M.Reinelt");
} else if (x >=9) {
lcd_put (1, 1, "LCD4Linux");
} else if (x>=7) {
lcd_put (1, 1, "L4Linux");
} else return 0;
lcd_put (1, 1, "* LCD4Linux V" VERSION " *");
lcd_put (2, 1, " (c) 2000 M.Reinelt");
lcd_flush();
return 1;
}
int main (int argc, char *argv[])
{
char *cfg="/etc/lcd4linux.conf";
char *driver;
int c, x, y, smooth;
int c, smooth;
while ((c=getopt (argc, argv, "c:f:hlo:"))!=EOF) {
switch (c) {
@@ -182,15 +210,11 @@ int main (int argc, char *argv[])
process_init();
lcd_clear();
lcd_query (&y, &x, NULL, NULL, NULL);
if (x>=20 && y>=2) {
lcd_put (1, 1, "* LCD4Linux V" VERSION " *");
lcd_put (2, 1, " (c) 2000 M.Reinelt");
lcd_flush();
if (hello()) {
sleep (3);
lcd_clear();
}
smooth=0;
while (1) {
process (smooth);
lock.c
+159
View File
@@ -0,0 +1,159 @@
/* $Id: lock.c,v 1.1 2000/04/07 05:42:20 reinelt Exp $
*
* UUCP style locking
*
* Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.at)
*
* This program 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.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: lock.c,v $
* Revision 1.1 2000/04/07 05:42:20 reinelt
*
* UUCP style lockfiles for the serial port
*
*/
/*
* exported functions:
*
* pid_t lock_port (char *port)
* returns 0 if port could be successfully locked
* otherwise returns PID of the process holding the lock
*
* pid_t unlock_port (char *port)
* returns 0 if port could be successfully unlocked
* otherwise returns PID of the process holding the lock
*
*/
#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 "lock.h"
pid_t lock_port (char *port)
{
char lockfile[256];
char tempfile[256];
char buffer[16];
char *p;
int fd, len, pid;
if ((p=strrchr (port, '/'))==NULL)
p=port;
else
p++;
snprintf(lockfile, sizeof(lockfile), LOCK, p);
snprintf(tempfile, sizeof(tempfile), LOCK, "TMP.XXXXXX");
if (mktemp(tempfile)==NULL) {
fprintf(stderr, "mktemp(%s) failed.\n", tempfile);
return -1;
}
if ((fd=creat(tempfile, 0664))==-1) {
fprintf(stderr, "creat(%s) failed: %s\n", tempfile, strerror(errno));
return -1;
}
snprintf (buffer, sizeof(buffer), "%10d\n", (int)getpid());
if (write(fd, buffer, strlen(buffer))!=strlen(buffer)) {
fprintf(stderr, "write(%s) failed: %s\n", tempfile, strerror(errno));
close(fd);
unlink(tempfile);
return -1;
}
close (fd);
while (link(tempfile, lockfile)==-1) {
if (errno!=EEXIST) {
fprintf(stderr, "link(%s, %s) failed: %s\n", tempfile, lockfile, strerror(errno));
unlink(tempfile);
return -1;
}
if ((fd=open(lockfile, O_RDONLY))==-1) {
if (errno==ENOENT) continue; // lockfile disappared
fprintf (stderr, "open(%s) failed: %s\n", lockfile, strerror(errno));
unlink (tempfile);
return -1;
}
len=read(fd, buffer, sizeof(buffer)-1);
if (len<0) {
fprintf (stderr, "read(%s) failed: %s\n", lockfile, strerror(errno));
unlink (tempfile);
return -1;
}
buffer[len]='\0';
if (sscanf(buffer, "%d", &pid)!=1 || pid==0) {
fprintf (stderr, "scan(%s) failed.\n", lockfile);
unlink (tempfile);
return -1;
}
if (pid==getpid()) {
fprintf (stderr, "%s already locked by us. uh-oh...\n", lockfile);
unlink(tempfile);
return 0;
}
if ((kill(pid, 0)==-1) && errno==ESRCH) {
fprintf (stderr, "removing stale lockfile %s\n", lockfile);
if (unlink(lockfile)==-1 && errno!=ENOENT) {
fprintf (stderr, "unlink(%s) failed: %s\n", lockfile, strerror(errno));
unlink(tempfile);
return pid;
}
continue;
}
unlink (tempfile);
return pid;
}
unlink (tempfile);
return 0;
}
pid_t unlock_port (char *port)
{
char lockfile[256];
char *p;
if ((p=strrchr (port, '/'))==NULL)
p=port;
else
p++;
snprintf(lockfile, sizeof(lockfile), LOCK, p);
unlink (lockfile);
return 0;
}
lock.h
+37
View File
@@ -0,0 +1,37 @@
/* $Id: lock.h,v 1.1 2000/04/07 05:42:20 reinelt Exp $
*
* UUCP style port locking
*
* Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.at)
*
* This program 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.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: lock.h,v $
* Revision 1.1 2000/04/07 05:42:20 reinelt
*
* UUCP style lockfiles for the serial port
*
*/
#ifndef _LOCK_H_
#define _LOCK_H_
#define LOCK "/var/lock/LCK..%s"
pid_t lock_port (char *port);
pid_t unlock_port (char *port);
#endif