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/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com) and
* geoffrey hing <ghing@net.ohio-state.edu>
* Licensed under the GPL
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include "init.h"
#include "user.h"
#include "os.h"
#define TTY_LOG_DIR "./"
/* Set early in boot and then unchanged */
static char *tty_log_dir = TTY_LOG_DIR;
static int tty_log_fd = -1;
#define TTY_LOG_OPEN 1
#define TTY_LOG_CLOSE 2
#define TTY_LOG_WRITE 3
#define TTY_LOG_EXEC 4
#define TTY_READ 1
#define TTY_WRITE 2
struct tty_log_buf {
int what;
unsigned long tty;
int len;
int direction;
unsigned long sec;
unsigned long usec;
};
int open_tty_log(void *tty, void *current_tty)
{
struct timeval tv;
struct tty_log_buf data;
char buf[strlen(tty_log_dir) + sizeof("01234567890-01234567\0")];
int fd;
gettimeofday(&tv, NULL);
if(tty_log_fd != -1){
data = ((struct tty_log_buf) { .what = TTY_LOG_OPEN,
.tty = (unsigned long) tty,
.len = sizeof(current_tty),
.direction = 0,
.sec = tv.tv_sec,
.usec = tv.tv_usec } );
write(tty_log_fd, &data, sizeof(data));
write(tty_log_fd, ¤t_tty, data.len);
return tty_log_fd;
}
sprintf(buf, "%s/%0u-%0u", tty_log_dir, (unsigned int) tv.tv_sec,
(unsigned int) tv.tv_usec);
fd = os_open_file(buf, of_append(of_create(of_rdwr(OPENFLAGS()))),
0644);
if(fd < 0){
printk("open_tty_log : couldn't open '%s', errno = %d\n",
buf, -fd);
}
return fd;
}
void close_tty_log(int fd, void *tty)
{
struct tty_log_buf data;
struct timeval tv;
if(tty_log_fd != -1){
gettimeofday(&tv, NULL);
data = ((struct tty_log_buf) { .what = TTY_LOG_CLOSE,
.tty = (unsigned long) tty,
.len = 0,
.direction = 0,
.sec = tv.tv_sec,
.usec = tv.tv_usec } );
write(tty_log_fd, &data, sizeof(data));
return;
}
os_close_file(fd);
}
static int log_chunk(int fd, const char *buf, int len)
{
int total = 0, try, missed, n;
char chunk[64];
while(len > 0){
try = (len > sizeof(chunk)) ? sizeof(chunk) : len;
missed = copy_from_user_proc(chunk, (char *) buf, try);
try -= missed;
n = write(fd, chunk, try);
if(n != try) {
if(n < 0)
return -errno;
return -EIO;
}
if(missed != 0)
return -EFAULT;
len -= try;
total += try;
buf += try;
}
return total;
}
int write_tty_log(int fd, const char *buf, int len, void *tty, int is_read)
{
struct timeval tv;
struct tty_log_buf data;
int direction;
if(fd == tty_log_fd){
gettimeofday(&tv, NULL);
direction = is_read ? TTY_READ : TTY_WRITE;
data = ((struct tty_log_buf) { .what = TTY_LOG_WRITE,
.tty = (unsigned long) tty,
.len = len,
.direction = direction,
.sec = tv.tv_sec,
.usec = tv.tv_usec } );
write(tty_log_fd, &data, sizeof(data));
}
return log_chunk(fd, buf, len);
}
void log_exec(char **argv, void *tty)
{
struct timeval tv;
struct tty_log_buf data;
char **ptr,*arg;
int len;
if(tty_log_fd == -1) return;
gettimeofday(&tv, NULL);
len = 0;
for(ptr = argv; ; ptr++){
if(copy_from_user_proc(&arg, ptr, sizeof(arg)))
return;
if(arg == NULL) break;
len += strlen_user_proc(arg);
}
data = ((struct tty_log_buf) { .what = TTY_LOG_EXEC,
.tty = (unsigned long) tty,
.len = len,
.direction = 0,
.sec = tv.tv_sec,
.usec = tv.tv_usec } );
write(tty_log_fd, &data, sizeof(data));
for(ptr = argv; ; ptr++){
if(copy_from_user_proc(&arg, ptr, sizeof(arg)))
return;
if(arg == NULL) break;
log_chunk(tty_log_fd, arg, strlen_user_proc(arg));
}
}
extern void register_tty_logger(int (*opener)(void *, void *),
int (*writer)(int, const char *, int,
void *, int),
void (*closer)(int, void *));
static int register_logger(void)
{
register_tty_logger(open_tty_log, write_tty_log, close_tty_log);
return 0;
}
__uml_initcall(register_logger);
static int __init set_tty_log_dir(char *name, int *add)
{
tty_log_dir = name;
return 0;
}
__uml_setup("tty_log_dir=", set_tty_log_dir,
"tty_log_dir=<directory>\n"
" This is used to specify the directory where the logs of all pty\n"
" data from this UML machine will be written.\n\n"
);
static int __init set_tty_log_fd(char *name, int *add)
{
char *end;
tty_log_fd = strtoul(name, &end, 0);
if((*end != '\0') || (end == name)){
printf("set_tty_log_fd - strtoul failed on '%s'\n", name);
tty_log_fd = -1;
}
*add = 0;
return 0;
}
__uml_setup("tty_log_fd=", set_tty_log_fd,
"tty_log_fd=<fd>\n"
" This is used to specify a preconfigured file descriptor to which all\n"
" tty data will be written. Preconfigure the descriptor with something\n"
" like '10>tty_log tty_log_fd=10'.\n\n"
);
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