diff options
| -rw-r--r-- | contrib/cpio/copyout.c | 142 |
1 files changed, 140 insertions, 2 deletions
diff --git a/contrib/cpio/copyout.c b/contrib/cpio/copyout.c index 22e9a0c..39890b0 100644 --- a/contrib/cpio/copyout.c +++ b/contrib/cpio/copyout.c @@ -35,6 +35,7 @@ static void add_link_defer (); static void writeout_other_defers (); static void writeout_final_defers(); static void writeout_defered_file (); +static int check_rdev (); /* Write out header FILE_HDR, including the file name, to file descriptor OUT_DES. */ @@ -293,8 +294,32 @@ process_copy_out () file_hdr.c_uid = file_stat.st_uid; file_hdr.c_gid = file_stat.st_gid; file_hdr.c_nlink = file_stat.st_nlink; - file_hdr.c_rdev_maj = major (file_stat.st_rdev); - file_hdr.c_rdev_min = minor (file_stat.st_rdev); + + /* The rdev is meaningless except for block and character + special files (POSIX standard) and perhaps fifos and + sockets. Clear it for other types of files so that + check_rdev() doesn't reject files just because stat() + put garbage in st_rdev and so that the output doesn't + depend on the garbage. */ + switch (file_hdr.c_mode & CP_IFMT) + { + case CP_IFBLK: + case CP_IFCHR: +#ifdef CP_IFIFO + case CP_IFIFO: +#endif +#ifdef CP_IFSOCK + case CP_IFSOCK: +#endif + file_hdr.c_rdev_maj = major (file_stat.st_rdev); + file_hdr.c_rdev_min = minor (file_stat.st_rdev); + break; + default: + file_hdr.c_rdev_maj = 0; + file_hdr.c_rdev_min = 0; + break; + } + file_hdr.c_mtime = file_stat.st_mtime; file_hdr.c_filesize = file_stat.st_size; file_hdr.c_chksum = 0; @@ -338,6 +363,23 @@ process_copy_out () continue; } + switch (check_rdev (&file_hdr)) + { + case 1: + error (0, 0, "%s not dumped: major number would be truncated", + file_hdr.c_name); + continue; + case 2: + error (0, 0, "%s not dumped: minor number would be truncated", + file_hdr.c_name); + continue; + case 4: + error (0, 0, "%s not dumped: device number would be truncated", + file_hdr.c_name); + continue; + } + + /* Copy the named file to the output. */ switch (file_hdr.c_mode & CP_IFMT) { @@ -805,3 +847,99 @@ writeout_defered_file (header, out_file_des) } return; } + + +static int +check_rdev (file_hdr) + struct new_cpio_header *file_hdr; +{ + if (archive_format == arf_newascii || archive_format == arf_crcascii) + { + if ((file_hdr->c_rdev_maj & 0xFFFFFFFF) != file_hdr->c_rdev_maj) + return 1; + if ((file_hdr->c_rdev_min & 0xFFFFFFFF) != file_hdr->c_rdev_min) + return 2; + } + else if (archive_format == arf_oldascii || archive_format == arf_hpoldascii) + { +#ifndef __MSDOS__ + dev_t rdev; + + rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min); + if (archive_format == arf_oldascii) + { + if ((rdev & 0xFFFF) != rdev) + return 4; + } + else + { + switch (file_hdr->c_mode & CP_IFMT) + { + case CP_IFCHR: + case CP_IFBLK: +#ifdef CP_IFSOCK + case CP_IFSOCK: +#endif +#ifdef CP_IFIFO + case CP_IFIFO: +#endif + /* We could handle one more bit if longs are >= 33 bits. */ + if ((rdev & 037777777777) != rdev) + return 4; + break; + default: + if ((rdev & 0xFFFF) != rdev) + return 4; + break; + } + } +#endif + } + else if (archive_format == arf_tar || archive_format == arf_ustar) + { + /* The major and minor formats are limited to 7 octal digits in ustar + format, and to_oct () adds a gratuitous trailing blank to further + limit the format to 6 octal digits. */ + if ((file_hdr->c_rdev_maj & 0777777) != file_hdr->c_rdev_maj) + return 1; + if ((file_hdr->c_rdev_min & 0777777) != file_hdr->c_rdev_min) + return 2; + } + else + { +#ifndef __MSDOS__ + dev_t rdev; + + rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min); + if (archive_format != arf_hpbinary) + { + if ((rdev & 0xFFFF) != rdev) + return 4; + } + else + { + switch (file_hdr->c_mode & CP_IFMT) + { + case CP_IFCHR: + case CP_IFBLK: +#ifdef CP_IFSOCK + case CP_IFSOCK: +#endif +#ifdef CP_IFIFO + case CP_IFIFO: +#endif + if ((rdev & 0xFFFFFFFF) != rdev) + return 4; + file_hdr->c_filesize = rdev; + rdev = makedev (0, 1); + break; + default: + if ((rdev & 0xFFFF) != rdev) + return 4; + break; + } + } +#endif + } + return 0; +} |
