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/* fileutil.c - file utilities
* Copyright (C) 1998 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG 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.
*
* GnuPG 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
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#ifdef __riscos__
#include <kernel.h>
#include <swis.h>
#endif /* __riscos__ */
#include "util.h"
#include "memory.h"
#include "ttyio.h"
/***************
* Extract from a given path the filename component.
*
*/
char *
make_basename(const char *filepath)
{
char *p;
if ( !(p=strrchr(filepath, DIRSEP_C)) )
#ifdef HAVE_DRIVE_LETTERS
if ( !(p=strrchr(filepath, '\\')) )
if ( !(p=strrchr(filepath, ':')) )
#endif
{
return m_strdup(filepath);
}
return m_strdup(p+1);
}
/***************
* Extract from a given filename the path prepended to it.
* If their isn't a path prepended to the filename, a dot
* is returned ('.').
*
*/
char *
make_dirname(const char *filepath)
{
char *dirname;
int dirname_length;
char *p;
if ( !(p=strrchr(filepath, DIRSEP_C)) )
#ifdef HAVE_DRIVE_LETTERS
if ( !(p=strrchr(filepath, '\\')) )
if ( !(p=strrchr(filepath, ':')) )
#endif
{
return m_strdup(EXTSEP_S);
}
dirname_length = p-filepath;
dirname = m_alloc(dirname_length+1);
strncpy(dirname, filepath, dirname_length);
dirname[dirname_length] = 0;
return dirname;
}
/****************
* Construct a filename from the NULL terminated list of parts.
* Tilde expansion is done here.
*/
char *
make_filename( const char *first_part, ... )
{
va_list arg_ptr ;
size_t n;
const char *s;
char *name, *home, *p;
va_start( arg_ptr, first_part ) ;
n = strlen(first_part)+1;
while( (s=va_arg(arg_ptr, const char *)) )
n += strlen(s) + 1;
va_end(arg_ptr);
#ifndef __riscos__
home = NULL;
if( *first_part == '~' && first_part[1] == DIRSEP_C
&& (home = getenv("HOME")) && *home )
n += strlen(home);
name = m_alloc(n);
p = home ? stpcpy(stpcpy(name,home), first_part+1)
: stpcpy(name, first_part);
#else /* __riscos__ */
name = m_alloc(n);
p = stpcpy(name, first_part);
#endif /* __riscos__ */
va_start( arg_ptr, first_part ) ;
while( (s=va_arg(arg_ptr, const char *)) )
p = stpcpy(stpcpy(p, DIRSEP_S), s);
va_end(arg_ptr);
#ifndef __riscos__
return name;
#else /* __riscos__ */
p = gstrans(name);
m_free(name);
return p;
#endif /* __riscos__ */
}
int
compare_filenames( const char *a, const char *b )
{
/* ? check whether this is an absolute filename and
* resolve symlinks?
*/
#ifndef __riscos__
#ifdef HAVE_DRIVE_LETTERS
return ascii_strcasecmp(a,b);
#else
return strcmp(a,b);
#endif
#else /* __riscos__ */
int c = 0;
char *abuf, *bbuf;
abuf = gstrans(a);
bbuf = gstrans(b);
c = strcasecmp (abuf, bbuf);
m_free(abuf);
m_free(bbuf);
return c;
#endif /* __riscos__ */
}
/****************
* A simple function to decide whether the filename is stdout
* or a real filename.
*/
const char *
print_fname_stdout( const char *s )
{
if( !s || (*s == '-' && !s[1]) )
return "[stdout]";
return s;
}
const char *
print_fname_stdin( const char *s )
{
if( !s || (*s == '-' && !s[1]) )
return "[stdin]";
return s;
}
/****************
* Check if the file is compressed.
**/
int
is_file_compressed( const char *s, int *ret_rc )
{
IOBUF a;
byte buf[4];
int i, rc = 0;
struct magic_compress_s {
size_t len;
byte magic[4];
} magic[] = {
{ 3, { 0x42, 0x5a, 0x68, 0x00 } }, /* bzip2 */
{ 3, { 0x1f, 0x8b, 0x08, 0x00 } }, /* gzip */
{ 4, { 0x50, 0x4b, 0x03, 0x04 } }, /* (pk)zip */
};
if ( !s || *s == '-' || !ret_rc )
return 0; /* We can't check stdin or no file was given */
a = iobuf_open( s );
if ( a == NULL ) {
*ret_rc = G10ERR_OPEN_FILE;
return 0;
}
if ( iobuf_get_filelength( a ) < 4 ) {
*ret_rc = 0;
goto leave;
}
if ( iobuf_read( a, buf, 4 ) == -1 ) {
*ret_rc = G10ERR_READ_FILE;
goto leave;
}
for ( i = 0; i < DIM( magic ); i++ ) {
if ( !memcmp( buf, magic[i].magic, magic[i].len ) ) {
*ret_rc = 0;
rc = 1;
break;
}
}
leave:
iobuf_close( a );
return rc;
}
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