diff options
Diffstat (limited to 'src/commands/rpm2cpio.c')
| -rw-r--r-- | src/commands/rpm2cpio.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/commands/rpm2cpio.c b/src/commands/rpm2cpio.c new file mode 100644 index 0000000..034cd89 --- /dev/null +++ b/src/commands/rpm2cpio.c @@ -0,0 +1,134 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ + +/* + * File-Roller + * + * Copyright (C) 2001 The Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA. + */ + +#include <config.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <glib.h> + + +static const char * +get_mime_type_from_magic_numbers (char *buffer) +{ + static struct { + const char *mime_type; + const char *first_bytes; + int offset; + int len; + } sniffer_data [] = { + { "application/x-bzip2", "BZh", 0, 3 }, + { "application/x-gzip", "\037\213", 0, 2 }, + { "application/x-xz", "\3757zXZ\000", 0, 6 }, + { NULL, NULL, 0 } + }; + int i; + + for (i = 0; sniffer_data[i].mime_type != NULL; i++) + if (memcmp (sniffer_data[i].first_bytes, + buffer + sniffer_data[i].offset, + sniffer_data[i].len) == 0) + { + return sniffer_data[i].mime_type; + } + + return NULL; +} + + +int +main (int argc, char **argv) +{ + const char *filename; + GString *cpio_args; + int i; + FILE *stream; + guchar bytes[8]; + int il, dl, sigsize, offset; + const char *mime_type; + const char *archive_command; + char *command; + + if (argc < 3) + return 0; + + filename = argv[1]; + cpio_args = g_string_new (argv[2]); + for (i = 3; i < argc; i++) { + g_string_append (cpio_args, " "); + g_string_append (cpio_args, argv[i]); + } + + stream = fopen (filename, "r"); + if (stream == NULL) + return 1; + + if (fseek (stream, 104 , SEEK_CUR) != 0) { + fclose (stream); + return 1; + } + if (fread (bytes, 1, 8, stream) == 0) { + fclose (stream); + return 1; + } + il = 256 * (256 * (256 * bytes[0] + bytes[1]) + bytes[2]) + bytes[3]; + dl = 256 * (256 * (256 * bytes[4] + bytes[5]) + bytes[6]) + bytes[7]; + sigsize = 8 + 16 * il + dl; + offset = 104 + sigsize + (8 - (sigsize % 8)) % 8 + 8; + if (fseek (stream, offset, SEEK_SET) != 0) { + fclose (stream); + return 1; + } + if (fread (bytes, 1, 8, stream) == 0) { + fclose (stream); + return 1; + } + il = 256 * (256 * (256 * bytes[0] + bytes[1]) + bytes[2]) + bytes[3]; + dl = 256 * (256 * (256 * bytes[4] + bytes[5]) + bytes[6]) + bytes[7]; + sigsize = 8 + 16 * il + dl; + offset = offset + sigsize; + + /* get the payload type */ + + if (fseek (stream, offset, SEEK_SET) != 0) { + fclose (stream); + return 1; + } + if (fread (bytes, 1, 8, stream) == 0) { + fclose (stream); + return 1; + } + mime_type = get_mime_type_from_magic_numbers ((char *)bytes); + if (mime_type == NULL) + archive_command = "lzma -dc"; + else if (strcmp (mime_type, "application/x-xz") == 0) + archive_command = "xz -dc"; + else if (strcmp (mime_type, "application/x-gzip") == 0) + archive_command = "gzip -dc"; + else + archive_command = "bzip2 -dc"; + fclose (stream); + + command = g_strdup_printf ("sh -c \"dd if=%s ibs=%u skip=1 2>/dev/null | %s | cpio %s\"", g_shell_quote (filename), offset, archive_command, cpio_args->str); + + return system (command); +} |