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/*
* serial.c:
*
* Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
* All rights reserved.
*
*/
static char rcsid[] = "$Id$";
/*
* $Log$
* Revision 1.2 2008/02/14 16:21:17 james
* *** empty log message ***
*
* Revision 1.1 2008/02/14 12:51:14 james
* *** empty log message ***
*
* Revision 1.4 2008/02/14 10:39:14 james
* *** empty log message ***
*
* Revision 1.3 2008/02/13 09:12:21 james
* *** empty log message ***
*
* Revision 1.2 2008/02/12 22:36:46 james
* *** empty log message ***
*
* Revision 1.1 2008/02/09 15:47:28 james
* *** empty log message ***
*
* Revision 1.2 2008/02/07 11:11:14 staffcvs
* *** empty log message ***
*
* Revision 1.1 2008/02/07 01:02:52 james
* *** empty log message ***
*
* Revision 1.3 2008/02/06 17:53:28 james
* *** empty log message ***
*
* Revision 1.2 2008/02/04 02:05:06 james
* *** empty log message ***
*
* Revision 1.1 2008/02/04 01:32:39 james
* *** empty log message ***
*
*/
#include "project.h"
#include <pwd.h>
#include <dirent.h>
#include <sys/stat.h>
#define LOCK_ASCII
#undef LOCK_BINARY
#define NLOCKFILES 10
typedef struct {
char *lockfiles[NLOCKFILES];
char *potential_lockfiles[NLOCKFILES];
struct timeval last_content_check;
} Serial_lock;
typedef struct
{
TTY_SIGNATURE;
Serial_lock lock;
int fd;
} Serial;
static int
chown_uucp(fd)
int fd;
{
static int uuid = -1, ugid;
struct passwd *pw;
if (uuid <0) {
if (pw = getpwnam("uucp")) {
uuid = pw->pw_uid;
ugid = pw->pw_gid;
} else {
return -1;
}
}
return fchown(fd, uuid, ugid);
}
int make_lockfile(char *name)
{
char buf[1024],tmpfn[1024];
char *ptr;
int fd;
int i;
strcpy(tmpfn,name);
ptr=rindex(tmpfn,'/');
if (!ptr) return -1;
ptr++;
ptr+=sprintf(ptr,"LTMP.%d",getpid());
*ptr=0;
i=sprintf(buf,"%10d\n",getpid());
fd=open(tmpfn,O_WRONLY|O_CREAT|O_TRUNC,0444);
if (fd<0) {
unlink(tmpfn);
return -1;
}
write(fd,buf,i);
fchmod(fd,044);
if( chown_uucp(fd)) {
close(fd);
unlink(tmpfn);
return -1;
}
close(fd);
if (link(tmpfn,name)<0) {
unlink(tmpfn);
return -1;
}
unlink(tmpfn);
return 0;
}
void construct_lock_file_name_by_name(char *ptr)
{
printf("lock by file %s\n",ptr);
}
void construct_lock_file_name_by_device(dev_t dev)
{
printf("lock by dev %x\n",dev);
}
#define DEV "/dev/"
int construct_possible_lock_files(char *device)
{
int nl;
struct dirent *de;
DIR *d;
struct stat dev_stat,ent_stat;
char buf[1024];
if (stat(device,&dev_stat)) return -1;
if (!S_ISCHR(dev_stat.st_mode)) return -1;
construct_lock_file_name_by_device(dev_stat.st_rdev);
construct_lock_file_name_by_name(device);
for (d=opendir(DEV);(de=readdir(d));)
{
strcpy(buf,DEV);
strcat(buf,de->d_name);
if (stat(buf,&ent_stat)) continue;
if (!S_ISCHR(ent_stat.st_mode)) continue;
if (ent_stat.st_rdev!=dev_stat.st_rdev) continue;
construct_lock_file_name_by_name(buf);
}
closedir(d);
}
static void
serial_check_lock(Serial *t)
{
}
static void
serial_close (TTY * _t)
{
Serial *t = (Serial *) _t;
if (!t)
return;
close (t->fd);
free (t);
}
static int
serial_read (TTY * _t, void *buf, int len)
{
Serial *t = (Serial *) _t;
int red, done = 0;
serial_check_lock(t);
if (t->blocked) return 0;
do
{
red = wrap_read (t->fd, buf, len);
if (red < 0)
return -1;
if (!red)
return done;
buf += red;
len -= red;
done += red;
}
while (len);
return done;
}
static int
ptty_write (TTY * _t, void *buf, int len)
{
int writ, done = 0;
Serial *t = (Serial *) _t;
serial_check_lock(t);
if (t->blocked) return 0;
do
{
writ = wrap_write (t->fd, buf, len);
if (writ < 0)
return -1;
if (!writ)
sleep (1);
buf += writ;
len -= writ;
done += writ;
}
while (len);
return done;
}
TTY *
serial_open (char *path)
{
Serial *t;
pid_t child;
char name[1024];
struct winsize winsize = { 0 };
struct termios termios;
int fd;
default_termios (&termios);
fd=open(path,O_RDWR);
set_nonblocking (fd);
t = (Serial *) malloc (sizeof (Serial));
strncpy (t->name, path, sizeof (t->name));
t->name[sizeof (t->name) - 1] = 0;
t->recv = serial_read;
//t->xmit = serial_write;
t->close = serial_close;
t->fd = fd;
t->rfd = t->fd;
t->wfd = t->fd;
t->size.x = VT102_COLS;
t->size.y = VT102_ROWS;
t->blocked = 0;
return (TTY *) t;
}
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