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Code Activity

2002-06-05 Timo Schulz <ts@winpt.org>

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* fileutil.c (is_file_compressed): Corrected the magic values
        for bzip2 and gzip. Noted by David.
This commit is contained in:
Timo Schulz 2002-06-05 09:23:51 +00:00
parent fd08b13528
commit 098a5229d1
2 changed files with 35 additions and 22 deletions
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5
util/ChangeLog
View File

@ -1,3 +1,8 @@
2002-06-05 Timo Schulz <ts@winpt.org>
* fileutil.c (is_file_compressed): Corrected the magic values
for bzip2 and gzip. Noted by David.
2002-05-22 Werner Koch <wk@gnupg.org>
* fileutil.c (compare_filenames): Replaced stricmp by strcasecmp.

52
util/fileutil.c
View File

@ -184,47 +184,55 @@ print_fname_stdin( const char *s )
return s;
}
/**
/****************
* Check if the file is compressed.
**/
int
is_file_compressed(const char *s, int *r_status)
is_file_compressed( const char *s, int *ret_rc )
{
IOBUF a;
int i, rc = 0;
byte buf[4];
int i, rc = 0;
const byte sigs[4][4] = {
{0x42, 0x5a, 0x68, 0x39}, /* bzip2 */
{0x1f, 0x8b, 0x08, 0x08}, /* gzip */
{0x50, 0x4b, 0x03, 0x04} /* (pk)zip */
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 == '-' || !r_status)
if ( !s || *s == '-' || !ret_rc )
return 0; /* We can't check stdin or no file was given */
if ( (a = iobuf_open(s)) == NULL ) {
*r_status = G10ERR_OPEN_FILE;
a = iobuf_open( s );
if ( a == NULL ) {
*ret_rc = G10ERR_OPEN_FILE;
return 0;
}
if (iobuf_get_filelength(a) < 4) {
*r_status = 0;
if ( iobuf_get_filelength( a ) < 4 ) {
*ret_rc = 0;
goto leave;
}
iobuf_read(a, buf, 4);
for (i=0; i<DIM(sigs); i++) {
if (!memcmp(buf, sigs[i], 4)) {
*r_status = 0;
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);
iobuf_close( a );
return rc;
}