diff options
Diffstat (limited to 'Utilities/cmlibarchive/examples/minitar/minitar.c')
| -rw-r--r-- | Utilities/cmlibarchive/examples/minitar/minitar.c | 421 |
1 files changed, 0 insertions, 421 deletions
diff --git a/Utilities/cmlibarchive/examples/minitar/minitar.c b/Utilities/cmlibarchive/examples/minitar/minitar.c deleted file mode 100644 index 73b4baf..0000000 --- a/Utilities/cmlibarchive/examples/minitar/minitar.c +++ /dev/null @@ -1,421 +0,0 @@ -/*- - * This file is in the public domain. - * Do with it as you will. - */ - -/*- - * This is a compact "tar" program whose primary goal is small size. - * Statically linked, it can be very small indeed. This serves a number - * of goals: - * o a testbed for libarchive (to check for link pollution), - * o a useful tool for space-constrained systems (boot floppies, etc), - * o a place to experiment with new implementation ideas for bsdtar, - * o a small program to demonstrate libarchive usage. - * - * Use the following macros to suppress features: - * NO_BZIP2 - Implies NO_BZIP2_CREATE and NO_BZIP2_EXTRACT - * NO_BZIP2_CREATE - Suppress bzip2 compression support. - * NO_BZIP2_EXTRACT - Suppress bzip2 auto-detection and decompression. - * NO_COMPRESS - Implies NO_COMPRESS_CREATE and NO_COMPRESS_EXTRACT - * NO_COMPRESS_CREATE - Suppress compress(1) compression support - * NO_COMPRESS_EXTRACT - Suppress compress(1) auto-detect and decompression. - * NO_CREATE - Suppress all archive creation support. - * NO_CPIO_EXTRACT - Suppress auto-detect and dearchiving of cpio archives. - * NO_GZIP - Implies NO_GZIP_CREATE and NO_GZIP_EXTRACT - * NO_GZIP_CREATE - Suppress gzip compression support. - * NO_GZIP_EXTRACT - Suppress gzip auto-detection and decompression. - * NO_LOOKUP - Try to avoid getpw/getgr routines, which can be very large - * NO_TAR_EXTRACT - Suppress tar extraction - * - * With all of the above macros defined (except NO_TAR_EXTRACT), you - * get a very small program that can recognize and extract essentially - * any uncompressed tar archive. On FreeBSD 5.1, this minimal program - * is under 64k, statically linked, which compares rather favorably to - * main(){printf("hello, world");} - * which is over 60k statically linked on the same operating system. - * Without any of the above macros, you get a static executable of - * about 180k with a lot of very sophisticated modern features. - * Obviously, it's trivial to add support for ISO, Zip, mtree, - * lzma/xz, etc. Just fill in the appropriate setup calls. - */ - -#include <sys/types.h> -__FBSDID("$FreeBSD$"); - -#include <sys/stat.h> - -#include <archive.h> -#include <archive_entry.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#ifndef NO_CREATE -#include "tree.h" -#endif - -/* - * NO_CREATE implies NO_BZIP2_CREATE and NO_GZIP_CREATE and NO_COMPRESS_CREATE. - */ -#ifdef NO_CREATE -#undef NO_BZIP2_CREATE -#define NO_BZIP2_CREATE -#undef NO_COMPRESS_CREATE -#define NO_COMPRESS_CREATE -#undef NO_GZIP_CREATE -#define NO_GZIP_CREATE -#endif - -/* - * The combination of NO_BZIP2_CREATE and NO_BZIP2_EXTRACT is - * equivalent to NO_BZIP2. - */ -#ifdef NO_BZIP2_CREATE -#ifdef NO_BZIP2_EXTRACT -#undef NO_BZIP2 -#define NO_BZIP2 -#endif -#endif - -#ifdef NO_BZIP2 -#undef NO_BZIP2_EXTRACT -#define NO_BZIP2_EXTRACT -#undef NO_BZIP2_CREATE -#define NO_BZIP2_CREATE -#endif - -/* - * The combination of NO_COMPRESS_CREATE and NO_COMPRESS_EXTRACT is - * equivalent to NO_COMPRESS. - */ -#ifdef NO_COMPRESS_CREATE -#ifdef NO_COMPRESS_EXTRACT -#undef NO_COMPRESS -#define NO_COMPRESS -#endif -#endif - -#ifdef NO_COMPRESS -#undef NO_COMPRESS_EXTRACT -#define NO_COMPRESS_EXTRACT -#undef NO_COMPRESS_CREATE -#define NO_COMPRESS_CREATE -#endif - -/* - * The combination of NO_GZIP_CREATE and NO_GZIP_EXTRACT is - * equivalent to NO_GZIP. - */ -#ifdef NO_GZIP_CREATE -#ifdef NO_GZIP_EXTRACT -#undef NO_GZIP -#define NO_GZIP -#endif -#endif - -#ifdef NO_GZIP -#undef NO_GZIP_EXTRACT -#define NO_GZIP_EXTRACT -#undef NO_GZIP_CREATE -#define NO_GZIP_CREATE -#endif - -#ifndef NO_CREATE -static void create(const char *filename, int compress, const char **argv); -#endif -static void errmsg(const char *); -static void extract(const char *filename, int do_extract, int flags); -static int copy_data(struct archive *, struct archive *); -static void msg(const char *); -static void usage(void); - -static int verbose = 0; - -int -main(int argc, const char **argv) -{ - const char *filename = NULL; - int compress, flags, mode, opt; - - (void)argc; - mode = 'x'; - verbose = 0; - compress = '\0'; - flags = ARCHIVE_EXTRACT_TIME; - - /* Among other sins, getopt(3) pulls in printf(3). */ - while (*++argv != NULL && **argv == '-') { - const char *p = *argv + 1; - - while ((opt = *p++) != '\0') { - switch (opt) { -#ifndef NO_CREATE - case 'c': - mode = opt; - break; -#endif - case 'f': - if (*p != '\0') - filename = p; - else - filename = *++argv; - p += strlen(p); - break; -#ifndef NO_BZIP2_CREATE - case 'j': - compress = opt; - break; -#endif - case 'p': - flags |= ARCHIVE_EXTRACT_PERM; - flags |= ARCHIVE_EXTRACT_ACL; - flags |= ARCHIVE_EXTRACT_FFLAGS; - break; - case 't': - mode = opt; - break; - case 'v': - verbose++; - break; - case 'x': - mode = opt; - break; -#ifndef NO_BZIP2_CREATE - case 'y': - compress = opt; - break; -#endif -#ifndef NO_COMPRESS_CREATE - case 'Z': - compress = opt; - break; -#endif -#ifndef NO_GZIP_CREATE - case 'z': - compress = opt; - break; -#endif - default: - usage(); - } - } - } - - switch (mode) { -#ifndef NO_CREATE - case 'c': - create(filename, compress, argv); - break; -#endif - case 't': - extract(filename, 0, flags); - break; - case 'x': - extract(filename, 1, flags); - break; - } - - return (0); -} - - -#ifndef NO_CREATE -static char buff[16384]; - -static void -create(const char *filename, int compress, const char **argv) -{ - struct archive *a; - struct archive *disk; - struct archive_entry *entry; - ssize_t len; - int fd; - - a = archive_write_new(); - switch (compress) { -#ifndef NO_BZIP2_CREATE - case 'j': case 'y': - archive_write_set_compression_bzip2(a); - break; -#endif -#ifndef NO_COMPRESS_CREATE - case 'Z': - archive_write_set_compression_compress(a); - break; -#endif -#ifndef NO_GZIP_CREATE - case 'z': - archive_write_set_compression_gzip(a); - break; -#endif - default: - archive_write_set_compression_none(a); - break; - } - archive_write_set_format_ustar(a); - if (strcmp(filename, "-") == 0) - filename = NULL; - archive_write_open_file(a, filename); - - disk = archive_read_disk_new(); -#ifndef NO_LOOKUP - archive_read_disk_set_standard_lookup(disk); -#endif - while (*argv != NULL) { - struct tree *t = tree_open(*argv); - while (tree_next(t)) { - entry = archive_entry_new(); - archive_entry_set_pathname(entry, tree_current_path(t)); - archive_read_disk_entry_from_file(disk, entry, -1, - tree_current_stat(t)); - if (verbose) { - msg("a "); - msg(tree_current_path(t)); - } - archive_write_header(a, entry); - fd = open(tree_current_access_path(t), O_RDONLY); - len = read(fd, buff, sizeof(buff)); - while (len > 0) { - archive_write_data(a, buff, len); - len = read(fd, buff, sizeof(buff)); - } - close(fd); - archive_entry_free(entry); - if (verbose) - msg("\n"); - } - argv++; - } - archive_write_close(a); - archive_write_finish(a); -} -#endif - -static void -extract(const char *filename, int do_extract, int flags) -{ - struct archive *a; - struct archive *ext; - struct archive_entry *entry; - int r; - - a = archive_read_new(); - ext = archive_write_disk_new(); - archive_write_disk_set_options(ext, flags); -#ifndef NO_BZIP2_EXTRACT - archive_read_support_compression_bzip2(a); -#endif -#ifndef NO_GZIP_EXTRACT - archive_read_support_compression_gzip(a); -#endif -#ifndef NO_COMPRESS_EXTRACT - archive_read_support_compression_compress(a); -#endif -#ifndef NO_TAR_EXTRACT - archive_read_support_format_tar(a); -#endif -#ifndef NO_CPIO_EXTRACT - archive_read_support_format_cpio(a); -#endif -#ifndef NO_LOOKUP - archive_write_disk_set_standard_lookup(ext); -#endif - if (filename != NULL && strcmp(filename, "-") == 0) - filename = NULL; - if ((r = archive_read_open_file(a, filename, 10240))) { - errmsg(archive_error_string(a)); - errmsg("\n"); - exit(r); - } - for (;;) { - r = archive_read_next_header(a, &entry); - if (r == ARCHIVE_EOF) - break; - if (r != ARCHIVE_OK) { - errmsg(archive_error_string(a)); - errmsg("\n"); - exit(1); - } - if (verbose && do_extract) - msg("x "); - if (verbose || !do_extract) - msg(archive_entry_pathname(entry)); - if (do_extract) { - r = archive_write_header(ext, entry); - if (r != ARCHIVE_OK) - errmsg(archive_error_string(a)); - else - copy_data(a, ext); - } - if (verbose || !do_extract) - msg("\n"); - } - archive_read_close(a); - archive_read_finish(a); - exit(0); -} - -static int -copy_data(struct archive *ar, struct archive *aw) -{ - int r; - const void *buff; - size_t size; - off_t offset; - - for (;;) { - r = archive_read_data_block(ar, &buff, &size, &offset); - if (r == ARCHIVE_EOF) { - errmsg(archive_error_string(ar)); - return (ARCHIVE_OK); - } - if (r != ARCHIVE_OK) - return (r); - r = archive_write_data_block(aw, buff, size, offset); - if (r != ARCHIVE_OK) { - errmsg(archive_error_string(ar)); - return (r); - } - } -} - -static void -msg(const char *m) -{ - write(1, m, strlen(m)); -} - -static void -errmsg(const char *m) -{ - write(2, m, strlen(m)); -} - -static void -usage(void) -{ -/* Many program options depend on compile options. */ - const char *m = "Usage: minitar [-" -#ifndef NO_CREATE - "c" -#endif -#ifndef NO_BZIP2 - "j" -#endif - "tvx" -#ifndef NO_BZIP2 - "y" -#endif -#ifndef NO_COMPRESS - "Z" -#endif -#ifndef NO_GZIP - "z" -#endif - "] [-f file] [file]\n"; - - errmsg(m); - exit(1); -} |