100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
|
/*
|
||
|
|
fseek.c -- test tool for seeking in zip archives
|
||
|
|
Copyright (C) 2016-2017 Dieter Baron and Thomas Klausner
|
||
|
|
|
||
|
|
This file is part of libzip, a library to manipulate ZIP archives.
|
||
|
|
The authors can be contacted at <libzip@nih.at>
|
||
|
|
|
||
|
|
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. The names of the authors may not be used to endorse or promote
|
||
|
|
products derived from this software without specific prior
|
||
|
|
written permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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 "compat.h"
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
#include "zip.h"
|
||
|
|
|
||
|
|
const char *progname;
|
||
|
|
#define USAGE "usage: %s archive index offset\n"
|
||
|
|
|
||
|
|
int
|
||
|
|
main(int argc, char *argv[]) {
|
||
|
|
int ze;
|
||
|
|
zip_t *z;
|
||
|
|
zip_file_t *zf;
|
||
|
|
char *archive;
|
||
|
|
zip_int64_t offset, n;
|
||
|
|
zip_uint64_t index;
|
||
|
|
char b[1024];
|
||
|
|
|
||
|
|
progname = argv[0];
|
||
|
|
|
||
|
|
if (argc != 4) {
|
||
|
|
fprintf(stderr, USAGE, progname);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
archive = argv[1];
|
||
|
|
index = strtoull(argv[2], NULL, 10);
|
||
|
|
offset = (zip_int64_t)strtoull(argv[3], NULL, 10);
|
||
|
|
|
||
|
|
if ((z = zip_open(archive, 0, &ze)) == NULL) {
|
||
|
|
zip_error_t error;
|
||
|
|
zip_error_init_with_code(&error, ze);
|
||
|
|
fprintf(stderr, "%s: can't open zip archive '%s': %s\n", progname, archive, zip_error_strerror(&error));
|
||
|
|
zip_error_fini(&error);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((zf = zip_fopen_index(z, index, 0)) == NULL) {
|
||
|
|
fprintf(stderr, "%s: can't open file in archive '%s': %s\n", progname, archive, zip_error_strerror(zip_file_get_error(zf)));
|
||
|
|
zip_close(z);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (zip_fseek(zf, offset, SEEK_SET) < 0) {
|
||
|
|
fprintf(stderr, "%s: zip_fseek failed: %s\n", progname, zip_error_strerror(zip_file_get_error(zf)));
|
||
|
|
zip_close(z);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
while ((n = zip_fread(zf, b, sizeof(b))) > 0) {
|
||
|
|
printf("%.*s", (int)n, b);
|
||
|
|
}
|
||
|
|
if (n < 0) {
|
||
|
|
fprintf(stderr, "%s: zip_fread failed: %s\n", progname, zip_error_strerror(zip_file_get_error(zf)));
|
||
|
|
zip_close(z);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (zip_close(z) == -1) {
|
||
|
|
fprintf(stderr, "%s: can't close zip archive '%s': %s\n", progname, archive, zip_strerror(z));
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|