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-rw-r--r--arch/um/os-Linux/tty_log.c218
1 files changed, 218 insertions, 0 deletions
diff --git a/arch/um/os-Linux/tty_log.c b/arch/um/os-Linux/tty_log.c
new file mode 100644
index 00000000000..c6ba56c1560
--- /dev/null
+++ b/arch/um/os-Linux/tty_log.c
@@ -0,0 +1,218 @@
+/*
+ * 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 "kern_util.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 } );
+ os_write_file(tty_log_fd, &data, sizeof(data));
+ os_write_file(tty_log_fd, &current_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 } );
+ os_write_file(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 = os_write_file(fd, chunk, try);
+ if(n != try) {
+ if(n < 0)
+ return(n);
+ 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 } );
+ os_write_file(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 } );
+ os_write_file(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"
+);