From a60936da062fc569328cd643c460dcf215ed9966 Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Sat, 28 Jun 2008 05:04:09 +0000 Subject: [PATCH] libunarchive: stop using static data in archivers - archive_handle_t can trivially provide space for that. rpm: code shrink tar: simplify autodetection of bz2/.gz function old new delta static.not_first 1 - -1 static.end 1 - -1 bb_makedev 51 49 -2 static.saved_hardlinks_created 4 - -4 static.saved_hardlinks 4 - -4 longname 4 - -4 linkname 4 - -4 hash_file 251 247 -4 get_header_tar 1528 1521 -7 rpm_main 1711 1697 -14 get_header_cpio 965 944 -21 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 0/5 up/down: 0/-66) Total: -66 bytes text data bss dec hex filename 804926 611 6868 812405 c6575 busybox_old 804878 611 6852 812341 c6535 busybox_unstripped --- archival/ar.c | 2 +- archival/cpio.c | 10 +-- archival/dpkg.c | 4 +- archival/libunarchive/data_extract_all.c | 22 ++--- archival/libunarchive/get_header_ar.c | 2 +- archival/libunarchive/get_header_cpio.c | 11 ++- archival/libunarchive/get_header_tar.c | 93 ++++++++++----------- archival/libunarchive/get_header_tar_lzma.c | 2 +- archival/rpm.c | 5 +- archival/tar.c | 12 +-- include/unarchive.h | 12 ++- 11 files changed, 89 insertions(+), 86 deletions(-) diff --git a/archival/ar.c b/archival/ar.c index ddc12095c..d49329ce9 100644 --- a/archival/ar.c +++ b/archival/ar.c @@ -63,7 +63,7 @@ int ar_main(int argc, char **argv) archive_handle->action_data = data_extract_all; } if (opt & AR_OPT_PRESERVE_DATE) { - archive_handle->flags |= ARCHIVE_PRESERVE_DATE; + archive_handle->ah_flags |= ARCHIVE_PRESERVE_DATE; } if (opt & AR_OPT_VERBOSE) { archive_handle->action_header = header_verbose_list_ar; diff --git a/archival/cpio.c b/archival/cpio.c index 0147d0e96..a10bfa85f 100644 --- a/archival/cpio.c +++ b/archival/cpio.c @@ -204,7 +204,7 @@ int cpio_main(int argc ATTRIBUTE_UNUSED, char **argv) archive_handle = init_handle(); archive_handle->src_fd = STDIN_FILENO; archive_handle->seek = seek_by_read; - archive_handle->flags = ARCHIVE_EXTRACT_NEWER; + archive_handle->ah_flags = ARCHIVE_EXTRACT_NEWER; #if ENABLE_FEATURE_CPIO_O opt = getopt32(argv, "ituvF:dmoH:", &cpio_filename, &cpio_fmt); @@ -241,8 +241,8 @@ int cpio_main(int argc ATTRIBUTE_UNUSED, char **argv) archive_handle->action_data = data_extract_all; } if (opt & CPIO_OPT_UNCONDITIONAL) { - archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; - archive_handle->flags &= ~ARCHIVE_EXTRACT_NEWER; + archive_handle->ah_flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; + archive_handle->ah_flags &= ~ARCHIVE_EXTRACT_NEWER; } if (opt & CPIO_OPT_VERBOSE) { if (archive_handle->action_header == header_list) { @@ -256,10 +256,10 @@ int cpio_main(int argc ATTRIBUTE_UNUSED, char **argv) archive_handle->seek = seek_by_jump; } if (opt & CPIO_OPT_CREATE_LEADING_DIR) { - archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS; + archive_handle->ah_flags |= ARCHIVE_CREATE_LEADING_DIRS; } if (opt & CPIO_OPT_PRESERVE_MTIME) { - archive_handle->flags |= ARCHIVE_PRESERVE_DATE; + archive_handle->ah_flags |= ARCHIVE_PRESERVE_DATE; } while (*argv) { diff --git a/archival/dpkg.c b/archival/dpkg.c index 34e5f80e4..22e26f566 100644 --- a/archival/dpkg.c +++ b/archival/dpkg.c @@ -1532,7 +1532,7 @@ static void unpack_package(deb_file_t *deb_file) archive_handle->sub_archive->filter = filter_accept_list; archive_handle->sub_archive->action_data = data_extract_all_prefix; archive_handle->sub_archive->buffer = info_prefix; - archive_handle->sub_archive->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; + archive_handle->sub_archive->ah_flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; unpack_ar_archive(archive_handle); /* Run the preinst prior to extracting */ @@ -1543,7 +1543,7 @@ static void unpack_package(deb_file_t *deb_file) init_archive_deb_data(archive_handle); archive_handle->sub_archive->action_data = data_extract_all_prefix; archive_handle->sub_archive->buffer = (char*)"/"; /* huh? */ - archive_handle->sub_archive->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; + archive_handle->sub_archive->ah_flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; unpack_ar_archive(archive_handle); /* Create the list file */ diff --git a/archival/libunarchive/data_extract_all.c b/archival/libunarchive/data_extract_all.c index 1b4876799..a67587d72 100644 --- a/archival/libunarchive/data_extract_all.c +++ b/archival/libunarchive/data_extract_all.c @@ -12,14 +12,14 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) int dst_fd; int res; - if (archive_handle->flags & ARCHIVE_CREATE_LEADING_DIRS) { + if (archive_handle->ah_flags & ARCHIVE_CREATE_LEADING_DIRS) { char *name = xstrdup(file_header->name); bb_make_directory(dirname(name), -1, FILEUTILS_RECUR); free(name); } /* Check if the file already exists */ - if (archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) { + if (archive_handle->ah_flags & ARCHIVE_EXTRACT_UNCONDITIONAL) { /* Remove the entry if it exists */ if (((file_header->mode & S_IFMT) != S_IFDIR) && (unlink(file_header->name) == -1) @@ -29,7 +29,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) file_header->name); } } - else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) { + else if (archive_handle->ah_flags & ARCHIVE_EXTRACT_NEWER) { /* Remove the existing entry if its older than the extracted entry */ struct stat statbuf; if (lstat(file_header->name, &statbuf) == -1) { @@ -38,7 +38,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) } } else if (statbuf.st_mtime <= file_header->mtime) { - if (!(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) { + if (!(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) { bb_error_msg("%s not created: newer or " "same age file exists", file_header->name); } @@ -58,7 +58,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) ) { /* hard link */ res = link(file_header->link_target, file_header->name); - if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) { + if ((res == -1) && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) { bb_perror_msg("cannot create %slink " "from %s to %s", "hard", file_header->name, @@ -78,7 +78,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) case S_IFDIR: res = mkdir(file_header->name, file_header->mode); if ((res == -1) && (errno != EISDIR) - && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET) + && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET) ) { bb_perror_msg("cannot make dir %s", file_header->name); } @@ -87,7 +87,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) /* Symlink */ res = symlink(file_header->link_target, file_header->name); if ((res == -1) - && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET) + && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET) ) { bb_perror_msg("cannot create %slink " "from %s to %s", "sym", @@ -101,7 +101,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) case S_IFIFO: res = mknod(file_header->name, file_header->mode, file_header->device); if ((res == -1) - && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET) + && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET) ) { bb_perror_msg("cannot create node %s", file_header->name); } @@ -111,7 +111,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) } } - if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) { + if (!(archive_handle->ah_flags & ARCHIVE_NOPRESERVE_OWN)) { #if ENABLE_FEATURE_TAR_UNAME_GNAME uid_t uid = file_header->uid; gid_t gid = file_header->gid; @@ -133,11 +133,11 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) /* uclibc has no lchmod, glibc is even stranger - * it has lchmod which seems to do nothing! * so we use chmod... */ - if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM)) { + if (!(archive_handle->ah_flags & ARCHIVE_NOPRESERVE_PERM)) { chmod(file_header->name, file_header->mode); } /* same for utime */ - if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) { + if (archive_handle->ah_flags & ARCHIVE_PRESERVE_DATE) { struct utimbuf t; t.actime = t.modtime = file_header->mtime; utime(file_header->name, &t); diff --git a/archival/libunarchive/get_header_ar.c b/archival/libunarchive/get_header_ar.c index 05222992d..59fd34c73 100644 --- a/archival/libunarchive/get_header_ar.c +++ b/archival/libunarchive/get_header_ar.c @@ -110,7 +110,7 @@ char FAST_FUNC get_header_ar(archive_handle_t *archive_handle) archive_handle->action_header(typed); if (archive_handle->sub_archive) { while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS) - /* repeat */; + continue; } else { archive_handle->action_data(archive_handle); } diff --git a/archival/libunarchive/get_header_cpio.c b/archival/libunarchive/get_header_cpio.c index 4ed18c68f..96be4b5ac 100644 --- a/archival/libunarchive/get_header_cpio.c +++ b/archival/libunarchive/get_header_cpio.c @@ -19,9 +19,6 @@ typedef struct hardlinks_s { char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle) { - static hardlinks_t *saved_hardlinks = NULL; - static hardlinks_t *saved_hardlinks_created = NULL; - file_header_t *file_header = archive_handle->file_header; char cpio_header[110]; char dummy[16]; @@ -29,6 +26,14 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle) int major, minor, nlink, mode, inode; unsigned size, uid, gid, mtime; +#define saved_hardlinks (*(hardlinks_t **)(&archive_handle->ah_priv[0])) +#define saved_hardlinks_created (*(hardlinks_t **)(&archive_handle->ah_priv[1])) +// if (!archive_handle->ah_priv_inited) { +// archive_handle->ah_priv_inited = 1; +// saved_hardlinks = NULL; +// saved_hardlinks_created = NULL; +// } + /* There can be padding before archive header */ data_align(archive_handle, 4); diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c index a0a53c908..69362f1cc 100644 --- a/archival/libunarchive/get_header_tar.c +++ b/archival/libunarchive/get_header_tar.c @@ -14,26 +14,13 @@ #include "libbb.h" #include "unarchive.h" -#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS -static char *longname; -static char *linkname; -#else -enum { - longname = 0, - linkname = 0, -}; -#endif - /* NB: _DESTROYS_ str[len] character! */ static unsigned long long getOctal(char *str, int len) { unsigned long long v; - /* Actually, tar header allows leading spaces also. - * Oh well, we will be liberal and skip this... - * The only downside probably is that we allow "-123" too :) - if (*str < '0' || *str > '7') - bb_error_msg_and_die("corrupted octal value in tar header"); - */ + /* NB: leading spaces are allowed. Using strtoull to handle that. + * The downside is that we accept e.g. "-123" too :) + */ str[len] = '\0'; v = strtoull(str, &str, 8); if (*str && (!ENABLE_FEATURE_TAR_OLDGNU_COMPATIBILITY || *str != ' ')) @@ -45,11 +32,6 @@ static unsigned long long getOctal(char *str, int len) void BUG_tar_header_size(void); char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) { - static smallint end; -#if ENABLE_FEATURE_TAR_AUTODETECT - static smallint not_first; -#endif - file_header_t *file_header = archive_handle->file_header; struct { /* ustar header, Posix 1003.1 */ @@ -65,7 +47,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) /* POSIX: "ustar" NUL "00" */ /* GNU tar: "ustar " NUL */ /* Normally it's defined as magic[6] followed by - * version[2], but we put them together to save code. + * version[2], but we put them together to simplify code */ char magic[8]; /* 257-264 */ char uname[32]; /* 265-296 */ @@ -82,6 +64,22 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) #endif int parse_names; + /* Our "private data" */ +#define p_end (*(smallint *)(&archive_handle->ah_priv[0])) +#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS +#define p_longname (*(char* *)(&archive_handle->ah_priv[1])) +#define p_linkname (*(char* *)(&archive_handle->ah_priv[2])) +#else +#define p_longname 0 +#define p_linkname 0 +#endif +// if (!archive_handle->ah_priv_inited) { +// archive_handle->ah_priv_inited = 1; +// p_end = 0; +// USE_FEATURE_TAR_GNU_EXTENSIONS(p_longname = NULL;) +// USE_FEATURE_TAR_GNU_EXTENSIONS(p_linkname = NULL;) +// } + if (sizeof(tar) != 512) BUG_tar_header_size(); @@ -95,7 +93,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) #if ENABLE_DESKTOP i = full_read(archive_handle->src_fd, &tar, 512); - /* if GNU tar sees EOF in above read, it says: + /* If GNU tar sees EOF in above read, it says: * "tar: A lone zero block at N", where N = kilobyte * where EOF was met (not EOF block, actual EOF!), * and tar will exit with error code 0. @@ -113,18 +111,18 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) /* If there is no filename its an empty header */ if (tar.name[0] == 0 && tar.prefix[0] == 0) { - if (end) { - /* This is the second consecutive empty header! End of archive! + if (p_end) { + /* Second consecutive empty header - end of archive. * Read until the end to empty the pipe from gz or bz2 */ while (full_read(archive_handle->src_fd, &tar, 512) == 512) continue; return EXIT_FAILURE; } - end = 1; + p_end = 1; return EXIT_SUCCESS; } - end = 0; + p_end = 0; /* Check header has valid magic, "ustar" is for the proper tar, * five NULs are for the old tar format */ @@ -136,12 +134,10 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) char FAST_FUNC (*get_header_ptr)(archive_handle_t *); /* tar gz/bz autodetect: check for gz/bz2 magic. - * If it is the very first block, and we see the magic, + * If we see the magic, and it is the very first block, * we can switch to get_header_tar_gz/bz2/lzma(). * Needs seekable fd. I wish recv(MSG_PEEK) works * on any fd... */ - if (not_first) - goto err; #if ENABLE_FEATURE_TAR_GZIP if (tar.name[0] == 0x1f && tar.name[1] == (char)0x8b) { /* gzip */ get_header_ptr = get_header_tar_gz; @@ -155,6 +151,9 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) } else #endif goto err; + /* Two different causes for lseek() != 0: + * unseekable fd (would like to support that too, but...), + * or not first block (false positive, it's not .gz/.bz2!) */ if (lseek(archive_handle->src_fd, -512, SEEK_CUR) != 0) goto err; while (get_header_ptr(archive_handle) == EXIT_SUCCESS) @@ -165,10 +164,6 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) bb_error_msg_and_die("invalid tar magic"); } -#if ENABLE_FEATURE_TAR_AUTODETECT - not_first = 1; -#endif - /* Do checksum on headers. * POSIX says that checksum is done on unsigned bytes, but * Sun and HP-UX gets it wrong... more details in @@ -219,7 +214,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) tar.prefix[0] = t; } file_header->link_target = NULL; - if (!linkname && parse_names && tar.linkname[0]) { + if (!p_linkname && parse_names && tar.linkname[0]) { file_header->link_target = xstrndup(tar.linkname, sizeof(tar.linkname)); /* FIXME: what if we have non-link object with link_target? */ /* Will link_target be free()ed? */ @@ -236,7 +231,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) file_header->mode = 07777 & GET_OCTAL(tar.mode); file_header->name = NULL; - if (!longname && parse_names) { + if (!p_longname && parse_names) { /* we trash mode[0] here, it's ok */ //tar.name[sizeof(tar.name)] = '\0'; - gcc 4.3.0 would complain tar.mode[0] = '\0'; @@ -284,20 +279,20 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS case 'L': /* free: paranoia: tar with several consecutive longnames */ - free(longname); + free(p_longname); /* For paranoia reasons we allocate extra NUL char */ - longname = xzalloc(file_header->size + 1); + p_longname = xzalloc(file_header->size + 1); /* We read ASCIZ string, including NUL */ - xread(archive_handle->src_fd, longname, file_header->size); + xread(archive_handle->src_fd, p_longname, file_header->size); archive_handle->offset += file_header->size; /* return get_header_tar(archive_handle); */ /* gcc 4.1.1 didn't optimize it into jump */ /* so we will do it ourself, this also saves stack */ goto again; case 'K': - free(linkname); - linkname = xzalloc(file_header->size + 1); - xread(archive_handle->src_fd, linkname, file_header->size); + free(p_linkname); + p_linkname = xzalloc(file_header->size + 1); + xread(archive_handle->src_fd, p_linkname, file_header->size); archive_handle->offset += file_header->size; /* return get_header_tar(archive_handle); */ goto again; @@ -324,13 +319,13 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) } #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS - if (longname) { - file_header->name = longname; - longname = NULL; + if (p_longname) { + file_header->name = p_longname; + p_longname = NULL; } - if (linkname) { - file_header->link_target = linkname; - linkname = NULL; + if (p_linkname) { + file_header->link_target = p_linkname; + p_linkname = NULL; } #endif if (!strncmp(file_header->name, "/../"+1, 3) @@ -349,7 +344,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) /* Note that we kill the '/' only after action_header() */ /* (like GNU tar 1.15.1: verbose mode outputs "dir/dir/") */ if (cp) *cp = '\0'; - archive_handle->flags |= ARCHIVE_EXTRACT_QUIET; + archive_handle->ah_flags |= ARCHIVE_EXTRACT_QUIET; archive_handle->action_data(archive_handle); llist_add_to(&(archive_handle->passed), file_header->name); } else { diff --git a/archival/libunarchive/get_header_tar_lzma.c b/archival/libunarchive/get_header_tar_lzma.c index 4ae125f4a..730c1b1bb 100644 --- a/archival/libunarchive/get_header_tar_lzma.c +++ b/archival/libunarchive/get_header_tar_lzma.c @@ -9,7 +9,7 @@ #include "libbb.h" #include "unarchive.h" -char FAST_FUNC get_header_tar_lzma(archive_handle_t * archive_handle) +char FAST_FUNC get_header_tar_lzma(archive_handle_t *archive_handle) { /* Can't lseek over pipes */ archive_handle->seek = seek_by_read; diff --git a/archival/rpm.c b/archival/rpm.c index 3d03dbcce..c4bcd605d 100644 --- a/archival/rpm.c +++ b/archival/rpm.c @@ -202,10 +202,9 @@ static void extract_cpio_gz(int fd) archive_handle->seek = seek_by_read; //archive_handle->action_header = header_list; archive_handle->action_data = data_extract_all; - archive_handle->flags |= ARCHIVE_PRESERVE_DATE; - archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS; + archive_handle->ah_flags = ARCHIVE_PRESERVE_DATE | ARCHIVE_CREATE_LEADING_DIRS; archive_handle->src_fd = fd; - archive_handle->offset = 0; + /*archive_handle->offset = 0; - init_handle() did it */ xread(archive_handle->src_fd, &magic, 2); #if BB_MMU diff --git a/archival/tar.c b/archival/tar.c index 2a140184c..526edb69d 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -814,9 +814,9 @@ int tar_main(int argc ATTRIBUTE_UNUSED, char **argv) /* Initialise default values */ tar_handle = init_handle(); - tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS - | ARCHIVE_PRESERVE_DATE - | ARCHIVE_EXTRACT_UNCONDITIONAL; + tar_handle->ah_flags = ARCHIVE_CREATE_LEADING_DIRS + | ARCHIVE_PRESERVE_DATE + | ARCHIVE_EXTRACT_UNCONDITIONAL; /* Prepend '-' to the first argument if required */ opt_complementary = "--:" // first arg is options @@ -862,13 +862,13 @@ int tar_main(int argc ATTRIBUTE_UNUSED, char **argv) tar_handle->action_data = data_extract_to_stdout; if (opt & OPT_KEEP_OLD) - tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL; + tar_handle->ah_flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL; if (opt & OPT_NOPRESERVE_OWN) - tar_handle->flags |= ARCHIVE_NOPRESERVE_OWN; + tar_handle->ah_flags |= ARCHIVE_NOPRESERVE_OWN; if (opt & OPT_NOPRESERVE_PERM) - tar_handle->flags |= ARCHIVE_NOPRESERVE_PERM; + tar_handle->ah_flags |= ARCHIVE_NOPRESERVE_PERM; if (opt & OPT_GZIP) get_header_ptr = get_header_tar_gz; diff --git a/include/unarchive.h b/include/unarchive.h index 721f879a4..1fab570c3 100644 --- a/include/unarchive.h +++ b/include/unarchive.h @@ -30,7 +30,7 @@ typedef struct file_header_t { } file_header_t; typedef struct archive_handle_t { - /* define if the header and data component should be processed */ + /* Define if the header and data component should be processed */ char FAST_FUNC (*filter)(struct archive_handle_t *); llist_t *accept; /* List of files that have been rejected */ @@ -41,10 +41,10 @@ typedef struct archive_handle_t { /* Contains the processed header entry */ file_header_t *file_header; - /* process the header component, e.g. tar -t */ + /* Process the header component, e.g. tar -t */ void FAST_FUNC (*action_header)(const file_header_t *); - /* process the data component, e.g. extract to filesystem */ + /* Process the data component, e.g. extract to filesystem */ void FAST_FUNC (*action_data)(struct archive_handle_t *); /* How to process any sub archive, e.g. get_header_tar_gz */ @@ -66,7 +66,11 @@ typedef struct archive_handle_t { char *buffer; /* Flags and misc. stuff */ - unsigned char flags; + unsigned char ah_flags; + + /* "Private" storage for archivers */ +// unsigned char ah_priv_inited; + void *ah_priv[8]; } archive_handle_t;