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/*
* This file is part of the Green End SFTP Server.
* Copyright (C) 2007, 2011 Richard Kettlewell
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
/** @file debug.c @brief Debug support implementation */
#include "sftpserver.h"
#include "debug.h"
#include <ctype.h>
#include <stdarg.h>
#include <errno.h>
#include <stdio.h>
#include <assert.h>
#include <fcntl.h>
#include <string.h>
/** @brief Output file for debug information */
static FILE *debugfp;
const char *sftp_debugpath;
int sftp_debugging;
/** @brief Ensure that @ref debugfp is open */
static void opendebug(void) {
assert(sftp_debugging);
if(!debugfp) {
if(sftp_debugpath) {
int fd;
if((fd = open(sftp_debugpath, O_WRONLY|O_CREAT|O_TRUNC, 0600)) >= 0)
debugfp = fdopen(fd, "w");
else
fprintf(stderr, "%s: %s\n", sftp_debugpath, strerror(errno));
}
if(!debugfp)
debugfp = stderr;
}
}
void sftp_debug_hexdump(const void *ptr, size_t n) {
const unsigned char *p = ptr;
size_t i, j;
char buffer[80], *output;
opendebug();
for(i = 0; i < n; i += 16) {
output = buffer;
output += sprintf(output, "%4lx ", (unsigned long)i);
for(j = 0; j < 16; ++j)
if(i + j < n)
output += sprintf(output, " %02x", p[i + j]);
else {
strcpy(output, " ");
output += 3;
}
strcpy(output, " ");
output += 2;
for(j = 0; j < 16; ++j)
if(i + j < n)
*output++ = isprint(p[i + j]) ? p[i+j] : '.';
*output++ = '\n';
*output = 0;
fputs(buffer, debugfp);
}
fflush(debugfp);
}
void sftp_debug_printf(const char *fmt, ...) {
va_list ap;
const int save_errno = errno;
opendebug();
va_start(ap, fmt);
vfprintf(debugfp, fmt, ap);
va_end(ap);
fputc('\n', debugfp);
fflush(debugfp);
errno = save_errno;
}
/*
Local Variables:
c-basic-offset:2
comment-column:40
fill-column:79
indent-tabs-mode:nil
End:
*/
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