fseek.c File Reference

#include <stdlib.h>
#include "zip.h"

Go to the source code of this file.

Macros
#define	USAGE   "usage: %s archive index offset\n"

Functions
int	main (int argc, char *argv[])

Variables
const char *	progname

Macro Definition Documentation

USAGE

#define USAGE   "usage: %s archive index offset\n"

Definition at line 39 of file fseek.c.

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 42 of file fseek.c.

                             {
    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_fclose(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_fclose(zf);
        zip_close(z);
        return 1;
    }
 
    if (zip_fclose(zf) == -1) {
        fprintf(stderr, "%s: can't close zip archive entry %" PRIu64 " in '%s': %s\n", progname, index, archive, zip_strerror(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;
}

References argv, b, error(), n, NULL, printf(), PRIu64, progname, SEEK_SET, USAGE, zip_close(), zip_error_fini(), zip_error_init_with_code(), zip_error_strerror(), zip_fclose(), zip_file_get_error(), zip_fopen_index(), zip_fread(), zip_fseek(), zip_open(), and zip_strerror().

Variable Documentation

progname

const char* progname

Definition at line 38 of file fseek.c.

Referenced by main().