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/*
W32 version of 'cat' program
Copyright (C) 2012 LRN
cat 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 3, or (at your
option) any later version.
cat 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 cat; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <windows.h>
#include <stdint.h>
#include <signal.h>
DWORD WINAPI
parent_control_thread (LPVOID lpParameter)
{
HANDLE h = (HANDLE) lpParameter;
while (TRUE)
{
DWORD dw;
BOOL b;
unsigned char c;
b = ReadFile (h, &c, 1, &dw, NULL);
if (!b)
{
ExitProcess (0);
}
raise ((int) c);
}
}
void
install_parent_control_handler ()
{
const char *env_buf;
char *env_buf_end;
uint64_t pipe_fd;
HANDLE pipe_handle;
env_buf = getenv ("GNUNET_OS_CONTROL_PIPE");
if ( (NULL == env_buf) || (strlen (env_buf) <= 0) )
return;
errno = 0;
pipe_fd = strtoull (env_buf, &env_buf_end, 16);
if ((0 != errno) || (env_buf == env_buf_end))
return;
/* Gcc will issue a warning here. What to do with it? */
pipe_handle = (HANDLE) (uintptr_t) pipe_fd;
CreateThread (NULL, 0, parent_control_thread, (LPVOID) pipe_handle, 0, NULL);
}
int
main (int argc, char **argv)
{
HANDLE stdi, stdo;
BOOL b;
wchar_t *commandlinew, **argvw;
int argcw;
int i;
stdo = GetStdHandle (STD_OUTPUT_HANDLE);
if (stdo == INVALID_HANDLE_VALUE || stdo == NULL)
return 1;
commandlinew = GetCommandLineW ();
argvw = CommandLineToArgvW (commandlinew, &argcw);
if (argvw == NULL)
return 1;
install_parent_control_handler ();
for (i = 1; i < argcw || argcw == 1; i++)
{
DWORD r, w;
int is_dash = wcscmp (NULL == argvw[i] ? L"-" : argvw[i], L"-") == 0;
if (argcw == 1 || is_dash)
{
stdi = GetStdHandle (STD_INPUT_HANDLE);
if (stdi == INVALID_HANDLE_VALUE)
{
fprintf (stderr, "cat: Failed to obtain stdin handle.\n");
return 4;
}
if (stdi == NULL)
{
fprintf (stderr, "cat: Have no stdin.\n");
return 5;
}
}
else
{
stdi = CreateFileW (argvw[i], GENERIC_READ, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
if (stdi == INVALID_HANDLE_VALUE)
{
wchar_t *msgbuf;
DWORD le = GetLastError ();
if (0 < FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, 0, le, 0, (wchar_t *) &msgbuf, 0, NULL))
{
fprintf (stderr, "cat: Failed to open file `%S'. Error %lu.\n", argvw[i], le);
return 3;
}
fprintf (stderr, "cat: Failed to open file `%S'. Error %lu: %S\n", argvw[i], le, msgbuf);
if (msgbuf != NULL)
LocalFree (msgbuf);
return 2;
}
}
do
{
unsigned char c;
b = ReadFile (stdi, &c, 1, &r, NULL);
if (b && r > 0)
{
b = WriteFile (stdo, &c, 1, &w, NULL);
if (b == 0)
{
wchar_t *msgbuf;
DWORD le = GetLastError ();
if (0 < FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, 0, le, 0, (wchar_t *) &msgbuf, 0, NULL))
{
fprintf (stderr, "cat: Failed to write into stdout. Error %lu.\n", le);
return 3;
}
fprintf (stderr, "cat: Failed to write into stdout. Error %lu: %S\n", le, msgbuf);
if (msgbuf != NULL)
LocalFree (msgbuf);
return 6;
}
}
} while (b && r > 0);
if (argcw == 1)
break;
if (!is_dash)
CloseHandle (stdi);
}
LocalFree (argvw);
return 0;
}
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