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/*
* Copyright 2005-2021 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2005-2010 Ned Ludd - <solar@gentoo.org>
* Copyright 2005-2014 Mike Frysinger - <vapier@gentoo.org>
*/
#include "main.h"
#include "applets.h"
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "basename.h"
#include "safe_io.h"
#include "scandirat.h"
#include "xpak.h"
#define QXPAK_FLAGS "lxcd:O" COMMON_FLAGS
static struct option const qxpak_long_opts[] = {
{"list", no_argument, NULL, 'l'},
{"extract", no_argument, NULL, 'x'},
{"create", no_argument, NULL, 'c'},
{"dir", a_argument, NULL, 'd'},
{"stdout", no_argument, NULL, 'O'},
COMMON_LONG_OPTS
};
static const char * const qxpak_opts_help[] = {
"List the contents of an archive",
"Extract the contents of an archive",
"Create an archive of a directory/files",
"Change to specified directory",
"Write files to stdout",
COMMON_OPTS_HELP
};
#define qxpak_usage(ret) usage(ret, QXPAK_FLAGS, qxpak_long_opts, qxpak_opts_help, NULL, lookup_applet_idx("qxpak"))
static char xpak_stdout;
struct qxpak_cb {
int dir_fd;
int argc;
char **argv;
bool extract;
};
static void
_xpak_callback(
void *ctx,
char *pathname,
int pathname_len,
int data_offset,
int data_len,
char *data)
{
FILE *out;
struct qxpak_cb *xctx = (struct qxpak_cb *)ctx;
/* see if there is a match when there is a selection */
if (xctx->argc > 0) {
int i;
for (i = 0; i < xctx->argc; i++) {
if (xctx->argv[i] && !strcmp(pathname, xctx->argv[i])) {
xctx->argv[i] = NULL;
break;
}
}
if (i == xctx->argc)
return;
}
if (verbose == 0 + (xctx->extract ? 1 : 0))
printf("%.*s\n", pathname_len, pathname);
else if (verbose == 1 + (xctx->extract ? 1 : 0))
printf("%.*s: %d byte%s\n",
pathname_len, pathname,
data_len, (data_len > 1 ? "s" : ""));
else if (verbose != 0)
printf("%.*s: %d byte%s @ offset byte %d\n",
pathname_len, pathname,
data_len, (data_len > 1 ? "s" : ""), data_offset);
if (!xctx->extract)
return;
if (!xpak_stdout) {
int fd = openat(xctx->dir_fd, pathname,
O_WRONLY | O_CLOEXEC | O_CREAT | O_TRUNC, 0644);
if (fd < 0)
return;
out = fdopen(fd, "w");
if (!out)
return;
} else
out = stdout;
fwrite(data + data_offset, 1, data_len, out);
if (!xpak_stdout)
fclose(out);
}
int qxpak_main(int argc, char **argv)
{
enum { XPAK_ACT_NONE, XPAK_ACT_LIST, XPAK_ACT_EXTRACT, XPAK_ACT_CREATE };
int i, ret;
char *xpak;
char action = XPAK_ACT_NONE;
struct qxpak_cb cbctx;
xpak_stdout = 0;
cbctx.dir_fd = AT_FDCWD;
cbctx.extract = false;
while ((i = GETOPT_LONG(QXPAK, qxpak, "")) != -1) {
switch (i) {
COMMON_GETOPTS_CASES(qxpak)
case 'l': action = XPAK_ACT_LIST; break;
case 'x': action = XPAK_ACT_EXTRACT; break;
case 'c': action = XPAK_ACT_CREATE; break;
case 'O': xpak_stdout = 1; break;
case 'd':
if (cbctx.dir_fd != AT_FDCWD)
err("Only use -d once");
cbctx.dir_fd = open(optarg, O_RDONLY|O_CLOEXEC|O_PATH);
if (cbctx.dir_fd < 0)
errp("Could not open directory %s", optarg);
break;
}
}
if (optind == argc || action == XPAK_ACT_NONE)
qxpak_usage(EXIT_FAILURE);
xpak = argv[optind++];
argc -= optind;
argv += optind;
cbctx.argc = argc;
cbctx.argv = argv;
switch (action) {
case XPAK_ACT_LIST:
ret = xpak_list(xpak, &cbctx, &_xpak_callback);
break;
case XPAK_ACT_EXTRACT:
cbctx.extract = true;
ret = xpak_extract(xpak, &cbctx, &_xpak_callback);
break;
case XPAK_ACT_CREATE:
ret = xpak_create(cbctx.dir_fd, xpak, argc, argv, 0, verbose);
break;
default:
ret = -1;
}
ret = ret < 0 ? EXIT_FAILURE : 0;
if (cbctx.dir_fd != AT_FDCWD)
close(cbctx.dir_fd);
/* warn about non-matched args */
if (argc > 0 && (action == XPAK_ACT_LIST || action == XPAK_ACT_EXTRACT))
for (i = 0; i < argc; ++i)
if (argv[i])
warn("Could not locate '%s' in archive", argv[i]);
return ret;
}
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