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119 lines
2.7 KiB
119 lines
2.7 KiB
/* SPDX-License-Identifier: ISC */
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#include <getopt.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include "util/util.h"
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#include "pkgreader.h"
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#include "command.h"
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#include "pkgio.h"
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static const struct option long_opts[] = {
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{ "root", required_argument, NULL, 'r' },
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{ "no-chown", no_argument, NULL, 'o' },
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{ "no-chmod", no_argument, NULL, 'm' },
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{ "no-symlinks", no_argument, NULL, 'L' },
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{ "no-devices", no_argument, NULL, 'D' },
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{ NULL, 0, NULL, 0 },
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};
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static const char *short_opts = "r:omLD";
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static int cmd_unpack(int argc, char **argv)
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{
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const char *root = NULL, *filename;
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int i, rootfd, flags = 0;
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pkg_reader_t *rd;
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for (;;) {
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i = getopt_long(argc, argv, short_opts, long_opts, NULL);
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if (i == -1)
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break;
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switch (i) {
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case 'r':
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root = optarg;
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break;
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case 'L':
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flags |= UNPACK_NO_SYMLINKS;
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break;
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case 'D':
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flags |= UNPACK_NO_DEVICES;
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break;
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case 'o':
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flags |= UNPACK_NO_CHOWN;
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break;
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case 'm':
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flags |= UNPACK_NO_CHMOD;
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break;
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default:
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tell_read_help(argv[0]);
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return EXIT_FAILURE;
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}
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}
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if (optind >= argc) {
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fputs("missing argument: package file\n", stderr);
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return EXIT_FAILURE;
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}
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filename = argv[optind++];
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if (optind < argc)
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fputs("warning: ignoring extra arguments\n", stderr);
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if (root == NULL) {
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rootfd = AT_FDCWD;
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} else {
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if (mkdir_p(root))
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return EXIT_FAILURE;
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rootfd = open(root, O_RDONLY | O_DIRECTORY);
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if (rootfd < 0) {
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perror(root);
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return EXIT_FAILURE;
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}
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}
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rd = pkg_reader_open(filename);
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if (rd == NULL)
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goto fail_rootfd;
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if (pkg_unpack(rootfd, flags, rd))
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goto fail;
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pkg_reader_close(rd);
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if (rootfd != AT_FDCWD)
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close(rootfd);
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return EXIT_SUCCESS;
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fail:
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pkg_reader_close(rd);
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fail_rootfd:
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if (rootfd != AT_FDCWD)
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close(rootfd);
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return EXIT_FAILURE;
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}
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static command_t unpack = {
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.cmd = "unpack",
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.usage = "[OPTIONS...] <pkgfile>",
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.s_desc = "unpack the contents of a package file",
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.l_desc =
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"The unpack command extracts the file hierarchy stored in a package into\n"
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"a destination directory (default: current working directory).\n"
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"\n"
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"Possible options:\n"
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" --root, -r <directory> A root directory to unpack the package. Defaults\n"
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" to the current working directory if not set.\n"
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" --no-chown, -o Do not change ownership of the extracted data.\n"
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" Keep the uid/gid of the user who runs the program.\n"
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" --no-chmod, -m Do not change permission flags of the extarcted\n"
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" data. Use 0644 for all files and 0755 for all\n"
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" directories.\n",
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.run_cmd = cmd_unpack,
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};
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REGISTER_COMMAND(unpack)
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