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/* $OpenBSD: common.c,v 1.1 1999/09/27 21:40:03 espie Exp $ */
/*-
* Copyright (c) 1999 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Marc Espie for the OpenBSD
* Project.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include "stand.h"
#include "gzip.h"
#include "pgp.h"
#include "extern.h"
/* Ensure consistent diagnostics */
int
read_header_and_diagnose(file, h, sign, filename)
FILE *file;
struct mygzip_header *h;
char sign[];
const char *filename;
{
switch(gzip_read_header(file, h, sign)) {
case GZIP_SIGNED:
if (sign == NULL) {
fprintf(stderr, "File %s is already signed\n", filename);
return 0;
} else
return 1;
case GZIP_UNSIGNED:
if (sign != NULL) {
fprintf(stderr, "File %s is not a signed gzip file\n", filename);
return 0;
} else
return 1;
case GZIP_NOT_GZIP:
fprintf(stderr, "File %s is not a gzip file\n", filename);
return 0;
case GZIP_NOT_PGPSIGNED:
fprintf(stderr, "File %s contains an unknown extension\n", filename);
return 0;
default:
/* this should not happen */
abort();
}
}
/* Check command existence */
int check_helpers()
{
struct stat sbuf;
if (stat(GZCAT, &sbuf) == -1) {
fprintf(stderr, "Tool %s does not exist\n", GZCAT);
return 0;
}
if (stat(PGP, &sbuf) == -1) {
fprintf(stderr, "Tool %s does not exist\n", PGP);
return 0;
}
return 1;
}
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