99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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fseek.c -- test tool for seeking in zip archives
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Copyright (C) 2016-2017 Dieter Baron and Thomas Klausner
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This file is part of libzip, a library to manipulate ZIP archives.
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The authors can be contacted at <libzip@nih.at>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. The names of the authors may not be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "compat.h"
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#include <stdlib.h>
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#include "zip.h"
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const char *progname;
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#define USAGE "usage: %s archive index offset\n"
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int
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main(int argc, char *argv[]) {
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int ze;
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zip_t *z;
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zip_file_t *zf;
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char *archive;
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zip_int64_t offset, n;
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zip_uint64_t index;
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char b[1024];
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progname = argv[0];
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if (argc != 4) {
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fprintf(stderr, USAGE, progname);
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return 1;
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}
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archive = argv[1];
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index = strtoull(argv[2], NULL, 10);
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offset = (zip_int64_t)strtoull(argv[3], NULL, 10);
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if ((z = zip_open(archive, 0, &ze)) == NULL) {
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zip_error_t error;
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zip_error_init_with_code(&error, ze);
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fprintf(stderr, "%s: can't open zip archive '%s': %s\n", progname, archive, zip_error_strerror(&error));
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zip_error_fini(&error);
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return 1;
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}
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if ((zf = zip_fopen_index(z, index, 0)) == NULL) {
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fprintf(stderr, "%s: can't open file in archive '%s': %s\n", progname, archive, zip_error_strerror(zip_file_get_error(zf)));
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zip_close(z);
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return 1;
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}
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if (zip_fseek(zf, offset, SEEK_SET) < 0) {
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fprintf(stderr, "%s: zip_fseek failed: %s\n", progname, zip_error_strerror(zip_file_get_error(zf)));
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zip_close(z);
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return 1;
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}
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while ((n = zip_fread(zf, b, sizeof(b))) > 0) {
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printf("%.*s", (int)n, b);
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}
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if (n < 0) {
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fprintf(stderr, "%s: zip_fread failed: %s\n", progname, zip_error_strerror(zip_file_get_error(zf)));
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zip_close(z);
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return 1;
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}
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if (zip_close(z) == -1) {
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fprintf(stderr, "%s: can't close zip archive '%s': %s\n", progname, archive, zip_strerror(z));
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return 1;
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}
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return 0;
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}
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