diff options
author | kientzle <kientzle@FreeBSD.org> | 2008-05-26 17:15:35 +0000 |
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committer | kientzle <kientzle@FreeBSD.org> | 2008-05-26 17:15:35 +0000 |
commit | 30d8209b8c69c616197b5e55f065d60b16235e77 (patch) | |
tree | 77cecd8fd6408385dac912ef7066edb8f24181a8 /usr.bin/cpio/cpio.c | |
parent | 0280e5aa4936e9ec440f688cb114b582e7926d28 (diff) | |
download | FreeBSD-src-30d8209b8c69c616197b5e55f065d60b16235e77.zip FreeBSD-src-30d8209b8c69c616197b5e55f065d60b16235e77.tar.gz |
Initial commit of bsdcpio 0.9.11b.
A new implementation of cpio that uses libarchive as it's back-end
archiving/dearchiving infrastructure. Includes test harness;
"make check" in the bsdcpio directory to build and run the test
harness.
Diffstat (limited to 'usr.bin/cpio/cpio.c')
-rw-r--r-- | usr.bin/cpio/cpio.c | 946 |
1 files changed, 946 insertions, 0 deletions
diff --git a/usr.bin/cpio/cpio.c b/usr.bin/cpio/cpio.c new file mode 100644 index 0000000..1d78ce1 --- /dev/null +++ b/usr.bin/cpio/cpio.c @@ -0,0 +1,946 @@ +/*- + * Copyright (c) 2003-2007 Tim Kientzle + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +#include "cpio_platform.h" +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <archive.h> +#include <archive_entry.h> + +#ifdef HAVE_SYS_STAT_H +#include <sys/stat.h> +#endif +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_FCNTL_H +#include <fcntl.h> +#endif +#ifdef HAVE_STDARG_H +#include <stdarg.h> +#endif +#include <stdio.h> +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "cpio.h" +#include "matching.h" + +static int copy_data(struct archive *, struct archive *); +static const char *cpio_rename(const char *name); +static int entry_to_archive(struct cpio *, struct archive_entry *); +static int file_to_archive(struct cpio *, const char *); +static void long_help(void); +static void mode_in(struct cpio *); +static void mode_list(struct cpio *); +static void mode_out(struct cpio *); +static void mode_pass(struct cpio *, const char *); +static void restore_time(struct cpio *, struct archive_entry *, + const char *, int fd); +static void usage(void); +static void version(void); + +int +main(int argc, char *argv[]) +{ + static char buff[16384]; + struct cpio _cpio; /* Allocated on stack. */ + struct cpio *cpio; + int uid, gid; + int opt; + + cpio = &_cpio; + memset(cpio, 0, sizeof(*cpio)); + cpio->buff = buff; + cpio->buff_size = sizeof(buff); + + /* Need cpio_progname before calling cpio_warnc. */ + if (*argv == NULL) + cpio_progname = "bsdcpio"; + else { + cpio_progname = strrchr(*argv, '/'); + if (cpio_progname != NULL) + cpio_progname++; + else + cpio_progname = *argv; + } + + cpio->uid_override = -1; + cpio->gid_override = -1; + cpio->argv = argv; + cpio->argc = argc; + cpio->mode = '\0'; + cpio->verbose = 0; + cpio->compress = '\0'; + /* TODO: Implement old binary format in libarchive, use that here. */ + cpio->format = "odc"; /* Default format */ + cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR; + cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; + cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS; + cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT; + /* TODO: If run by root, set owner as well. */ + cpio->bytes_per_block = 512; + cpio->filename = NULL; + + while ((opt = cpio_getopt(cpio)) != -1) { + switch (opt) { + case 'A': /* NetBSD/OpenBSD */ + cpio->option_append = 1; + break; + case 'a': /* POSIX 1997 */ + cpio->option_atime_restore = 1; + break; + case 'B': /* POSIX 1997 */ + cpio->bytes_per_block = 5120; + break; + case 'C': /* NetBSD/OpenBSD */ + cpio->bytes_per_block = atoi(optarg); + if (cpio->bytes_per_block <= 0) + cpio_errc(1, 0, "Invalid blocksize %s", optarg); + break; + case 'c': /* POSIX 1997 */ + cpio->format = "odc"; + break; + case 'd': /* POSIX 1997 */ + cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR; + break; + case 'E': /* NetBSD/OpenBSD */ + include_from_file(cpio, optarg); + break; + case 'F': /* NetBSD/OpenBSD/GNU cpio */ + cpio->filename = optarg; + break; + case 'f': /* POSIX 1997 */ + exclude(cpio, optarg); + break; + case 'H': /* GNU cpio (also --format) */ + cpio->format = optarg; + break; + case 'h': + long_help(); + break; + case 'I': /* NetBSD/OpenBSD */ + cpio->filename = optarg; + break; + case 'i': /* POSIX 1997 */ + cpio->mode = opt; + break; + case OPTION_INSECURE: + cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS; + cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; + break; + case 'L': /* GNU cpio */ + cpio->option_follow_links = 1; + break; + case 'l': /* POSIX 1997 */ + cpio->option_link = 1; + break; + case 'm': /* POSIX 1997 */ + cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; + break; + case 'O': /* GNU cpio */ + cpio->filename = optarg; + break; + case 'o': /* POSIX 1997 */ + cpio->mode = opt; + break; + case 'p': /* POSIX 1997 */ + cpio->mode = opt; + break; + case OPTION_QUIET: /* GNU cpio */ + cpio->quiet = 1; + break; + case 'R': /* GNU cpio, also --owner */ + if (owner_parse(optarg, &uid, &gid)) + usage(); + if (uid != -1) + cpio->uid_override = uid; + if (gid != -1) + cpio->gid_override = gid; + break; + case 'r': /* POSIX 1997 */ + cpio->option_rename = 1; + break; + case 't': /* POSIX 1997 */ + cpio->option_list = 1; + break; + case 'u': /* POSIX 1997 */ + cpio->extract_flags + &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; + break; + case 'v': /* POSIX 1997 */ + cpio->verbose++; + break; + case OPTION_VERSION: /* GNU convention */ + version(); + break; +#if 0 + /* + * cpio_getopt() handles -W specially, so it's not + * available here. + */ + case 'W': /* Obscure, but useful GNU convention. */ + break; +#endif + case 'y': /* tar convention */ + cpio->compress = opt; + break; + case 'Z': /* tar convention */ + cpio->compress = opt; + break; + case 'z': /* tar convention */ + cpio->compress = opt; + break; + default: + usage(); + } + } + + /* TODO: Sanity-check args, error out on nonsensical combinations. */ + + cpio->argc -= optind; + cpio->argv += optind; + + switch (cpio->mode) { + case 'o': + mode_out(cpio); + break; + case 'i': + while (*cpio->argv != NULL) { + include(cpio, *cpio->argv); + --cpio->argc; + ++cpio->argv; + } + if (cpio->option_list) + mode_list(cpio); + else + mode_in(cpio); + break; + case 'p': + if (*cpio->argv == NULL || **cpio->argv == '\0') + cpio_errc(1, 0, + "-p mode requires a target directory"); + mode_pass(cpio, *cpio->argv); + break; + default: + cpio_errc(1, 0, + "Must specify at least one of -i, -o, or -p"); + } + + return (0); +} + +void +usage(void) +{ + const char *p; + + p = cpio_progname; + + fprintf(stderr, "Brief Usage:\n"); + fprintf(stderr, " List: %s -it < archive\n", p); + fprintf(stderr, " Extract: %s -i < archive\n", p); + fprintf(stderr, " Create: %s -o < filenames > archive\n", p); +#ifdef HAVE_GETOPT_LONG + fprintf(stderr, " Help: %s --help\n", p); +#else + fprintf(stderr, " Help: %s -h\n", p); +#endif + exit(1); +} + +static const char *long_help_msg = + "First option must be a mode specifier:\n" + " -i Input -o Output -p Pass\n" + "Common Options:\n" + " -v Verbose\n" + "Create: %p -o [options] < [list of files] > [archive]\n" + " -z, -y Compress archive with gzip/bzip2\n" + " --format {odc|newc|ustar} Select archive format\n" + "List: %p -it < [archive]\n" + "Extract: %p -i [options] < [archive]\n"; + + +/* + * Note that the word 'bsdcpio' will always appear in the first line + * of output. + * + * In particular, /bin/sh scripts that need to test for the presence + * of bsdcpio can use the following template: + * + * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ + * echo bsdcpio; else echo not bsdcpio; fi + */ +static void +long_help(void) +{ + const char *prog; + const char *p; + + prog = cpio_progname; + + fflush(stderr); + + p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; + printf("%s%s: manipulate archive files\n", prog, p); + + for (p = long_help_msg; *p != '\0'; p++) { + if (*p == '%') { + if (p[1] == 'p') { + fputs(prog, stdout); + p++; + } else + putchar('%'); + } else + putchar(*p); + } + version(); +} + +static void +version(void) +{ + fprintf(stdout,"bsdcpio %s -- %s\n", + BSDCPIO_VERSION_STRING, + archive_version()); + exit(0); +} + +static void +mode_out(struct cpio *cpio) +{ + struct archive_entry *entry, *spare; + unsigned long blocks; + int r; + + if (cpio->option_append) + cpio_errc(1, 0, "Append mode not yet supported."); + cpio->archive = archive_write_new(); + if (cpio->archive == NULL) + cpio_errc(1, 0, "Failed to allocate archive object"); + switch (cpio->compress) { + case 'j': case 'y': + archive_write_set_compression_bzip2(cpio->archive); + break; + case 'z': + archive_write_set_compression_gzip(cpio->archive); + break; + case 'Z': + archive_write_set_compression_compress(cpio->archive); + break; + default: + archive_write_set_compression_none(cpio->archive); + break; + } + r = archive_write_set_format_by_name(cpio->archive, cpio->format); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(cpio->archive)); + archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); + cpio->linkresolver = archive_entry_linkresolver_new(); + archive_entry_linkresolver_set_strategy(cpio->linkresolver, + archive_format(cpio->archive)); + + r = archive_write_open_file(cpio->archive, cpio->filename); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(cpio->archive)); + process_lines(cpio, "-", file_to_archive); + + /* + * The hardlink detection may have queued up a couple of entries + * that can now be flushed. + */ + entry = NULL; + archive_entry_linkify(cpio->linkresolver, &entry, &spare); + while (entry != NULL) { + entry_to_archive(cpio, entry); + archive_entry_free(entry); + entry = NULL; + archive_entry_linkify(cpio->linkresolver, &entry, &spare); + } + + r = archive_write_close(cpio->archive); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(cpio->archive)); + + if (!cpio->quiet) { + blocks = (archive_position_uncompressed(cpio->archive) + 511) + / 512; + fprintf(stderr, "%lu %s\n", blocks, + blocks == 1 ? "block" : "blocks"); + } + archive_write_finish(cpio->archive); +} + +/* + * This is used by both out mode (to copy objects from disk into + * an archive) and pass mode (to copy objects from disk to + * an archive_write_disk "archive"). + */ +static int +file_to_archive(struct cpio *cpio, const char *srcpath) +{ + struct stat st; + const char *destpath; + struct archive_entry *entry, *spare; + size_t len; + const char *p; + int lnklen; + int r; + + /* + * Create an archive_entry describing the source file. + */ + entry = archive_entry_new(); + if (entry == NULL) + cpio_errc(1, 0, "Couldn't allocate entry"); + archive_entry_copy_sourcepath(entry, srcpath); + + /* Get stat information. */ + if (cpio->option_follow_links) + r = stat(srcpath, &st); + else + r = lstat(srcpath, &st); + if (r != 0) { + cpio_warnc(errno, "Couldn't stat \"%s\"", srcpath); + archive_entry_free(entry); + return (0); + } + + if (cpio->uid_override >= 0) + st.st_uid = cpio->uid_override; + if (cpio->gid_override >= 0) + st.st_gid = cpio->uid_override; + archive_entry_copy_stat(entry, &st); + + /* If its a symlink, pull the target. */ + if (S_ISLNK(st.st_mode)) { + lnklen = readlink(srcpath, cpio->buff, cpio->buff_size); + if (lnklen < 0) { + cpio_warnc(errno, + "%s: Couldn't read symbolic link", srcpath); + archive_entry_free(entry); + return (0); + } + cpio->buff[lnklen] = 0; + archive_entry_set_symlink(entry, cpio->buff); + } + + /* + * Generate a destination path for this entry. + * "destination path" is the name to which it will be copied in + * pass mode or the name that will go into the archive in + * output mode. + */ + destpath = srcpath; + if (cpio->destdir) { + len = strlen(cpio->destdir) + strlen(srcpath) + 8; + if (len >= cpio->pass_destpath_alloc) { + while (len >= cpio->pass_destpath_alloc) { + cpio->pass_destpath_alloc += 512; + cpio->pass_destpath_alloc *= 2; + } + free(cpio->pass_destpath); + cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); + if (cpio->pass_destpath == NULL) + cpio_errc(1, ENOMEM, + "Can't allocate path buffer"); + } + strcpy(cpio->pass_destpath, cpio->destdir); + p = srcpath; + while (p[0] == '/') + ++p; + strcat(cpio->pass_destpath, p); + destpath = cpio->pass_destpath; + } + if (cpio->option_rename) + destpath = cpio_rename(destpath); + if (destpath == NULL) + return (0); + archive_entry_copy_pathname(entry, destpath); + + /* + * If we're trying to preserve hardlinks, match them here. + */ + spare = NULL; + if (cpio->linkresolver != NULL + && !S_ISDIR(st.st_mode)) { + archive_entry_linkify(cpio->linkresolver, &entry, &spare); + } + + if (entry != NULL) { + r = entry_to_archive(cpio, entry); + archive_entry_free(entry); + } + if (spare != NULL) { + if (r == 0) + r = entry_to_archive(cpio, spare); + archive_entry_free(spare); + } + return (r); +} + +static int +entry_to_archive(struct cpio *cpio, struct archive_entry *entry) +{ + const char *destpath = archive_entry_pathname(entry); + const char *srcpath = archive_entry_sourcepath(entry); + int fd = -1; + ssize_t bytes_read; + int r; + + /* Print out the destination name to the user. */ + if (cpio->verbose) + fprintf(stderr,"%s", destpath); + + /* + * Obviously, this only gets invoked in pass mode. + */ + if (cpio->option_link) { + /* Note: link(2) doesn't create parent directories. */ + archive_entry_set_hardlink(entry, srcpath); + r = archive_write_header(cpio->archive, entry); + if (r != ARCHIVE_OK) + cpio_warnc(archive_errno(cpio->archive), + archive_error_string(cpio->archive)); + if (r == ARCHIVE_FATAL) + exit(1); + return (0); + } + + /* + * Make sure we can open the file (if necessary) before + * trying to write the header. + */ + if (archive_entry_filetype(entry) == AE_IFREG) { + if (archive_entry_size(entry) > 0) { + fd = open(srcpath, O_RDONLY); + if (fd < 0) { + cpio_warnc(errno, + "%s: could not open file", srcpath); + goto cleanup; + } + } + } else { + archive_entry_set_size(entry, 0); + } + + r = archive_write_header(cpio->archive, entry); + + if (r != ARCHIVE_OK) + cpio_warnc(archive_errno(cpio->archive), + "%s: %s", + destpath, + archive_error_string(cpio->archive)); + + if (r == ARCHIVE_FATAL) + exit(1); + + if (r >= ARCHIVE_WARN && fd >= 0) { + bytes_read = read(fd, cpio->buff, cpio->buff_size); + while (bytes_read > 0) { + r = archive_write_data(cpio->archive, + cpio->buff, bytes_read); + if (r < 0) + cpio_errc(1, archive_errno(cpio->archive), + archive_error_string(cpio->archive)); + if (r < bytes_read) { + cpio_warnc(0, + "Truncated write; file may have grown while being archived."); + } + bytes_read = read(fd, cpio->buff, cpio->buff_size); + } + } + + restore_time(cpio, entry, srcpath, fd); + +cleanup: + if (cpio->verbose) + fprintf(stderr,"\n"); + if (fd >= 0) + close(fd); + return (0); +} + +static void +restore_time(struct cpio *cpio, struct archive_entry *entry, + const char *name, int fd) +{ +#ifndef HAVE_UTIMES + static int warned = 0; + + (void)cpio; /* UNUSED */ + (void)entry; /* UNUSED */ + (void)name; /* UNUSED */ + (void)fd; /* UNUSED */ + + if (!warned) + cpio_warnc(0, "Can't restore access times on this platform"); + warned = 1; + return; +#else + struct timeval times[2]; + + if (!cpio->option_atime_restore) + return; + + times[1].tv_sec = archive_entry_mtime(entry); + times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; + + times[0].tv_sec = archive_entry_atime(entry); + times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; + +#ifdef HAVE_FUTIMES + if (fd >= 0 && futimes(fd, times) == 0) + return; +#endif + +#ifdef HAVE_LUTIMES + if (lutimes(name, times) != 0) +#else + if (!S_ISLNK(archive_entry_mode(entry)) && utimes(name, times) != 0) +#endif + cpio_warnc(errno, "Can't update time for %s", name); +#endif +} + + +static void +mode_in(struct cpio *cpio) +{ + struct archive *a; + struct archive_entry *entry; + struct archive *ext; + const char *destpath; + unsigned long blocks; + int r; + + ext = archive_write_disk_new(); + if (ext == NULL) + cpio_errc(1, 0, "Couldn't allocate restore object"); + r = archive_write_disk_set_options(ext, cpio->extract_flags); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(ext)); + a = archive_read_new(); + if (a == NULL) + cpio_errc(1, 0, "Couldn't allocate archive object"); + archive_read_support_compression_all(a); + archive_read_support_format_all(a); + + if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block)) + cpio_errc(1, archive_errno(a), + archive_error_string(a)); + for (;;) { + r = archive_read_next_header(a, &entry); + if (r == ARCHIVE_EOF) + break; + if (r != ARCHIVE_OK) { + cpio_errc(1, archive_errno(a), + archive_error_string(a)); + } + if (excluded(cpio, archive_entry_pathname(entry))) + continue; + if (cpio->option_rename) { + destpath = cpio_rename(archive_entry_pathname(entry)); + archive_entry_set_pathname(entry, destpath); + } else + destpath = archive_entry_pathname(entry); + if (destpath == NULL) + continue; + if (cpio->verbose) + fprintf(stdout, "%s\n", destpath); + if (cpio->uid_override >= 0) + archive_entry_set_uid(entry, cpio->uid_override); + if (cpio->gid_override >= 0) + archive_entry_set_gid(entry, cpio->gid_override); + r = archive_write_header(ext, entry); + if (r != ARCHIVE_OK) { + fprintf(stderr, "%s: %s\n", + archive_entry_pathname(entry), + archive_error_string(ext)); + } else if (archive_entry_size(entry) > 0) { + r = copy_data(a, ext); + } + } + r = archive_read_close(a); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(a)); + r = archive_write_close(ext); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(ext)); + if (!cpio->quiet) { + blocks = (archive_position_uncompressed(a) + 511) + / 512; + fprintf(stderr, "%lu %s\n", blocks, + blocks == 1 ? "block" : "blocks"); + } + archive_read_finish(a); + archive_write_finish(ext); + exit(0); +} + +static int +copy_data(struct archive *ar, struct archive *aw) +{ + int r; + size_t size; + const void *block; + off_t offset; + + for (;;) { + r = archive_read_data_block(ar, &block, &size, &offset); + if (r == ARCHIVE_EOF) + return (ARCHIVE_OK); + if (r != ARCHIVE_OK) { + cpio_warnc(archive_errno(ar), + "%s", archive_error_string(ar)); + return (r); + } + r = archive_write_data_block(aw, block, size, offset); + if (r != ARCHIVE_OK) { + cpio_warnc(archive_errno(aw), + archive_error_string(aw)); + return (r); + } + } +} + +static void +mode_list(struct cpio *cpio) +{ + struct archive *a; + struct archive_entry *entry; + unsigned long blocks; + int r; + + a = archive_read_new(); + if (a == NULL) + cpio_errc(1, 0, "Couldn't allocate archive object"); + archive_read_support_compression_all(a); + archive_read_support_format_all(a); + + if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block)) + cpio_errc(1, archive_errno(a), + archive_error_string(a)); + for (;;) { + r = archive_read_next_header(a, &entry); + if (r == ARCHIVE_EOF) + break; + if (r != ARCHIVE_OK) { + cpio_errc(1, archive_errno(a), + archive_error_string(a)); + } + if (excluded(cpio, archive_entry_pathname(entry))) + continue; + if (cpio->verbose) { + /* TODO: uname/gname lookups */ + /* TODO: Clean this up. */ + fprintf(stdout, + "%s%3d %8s%8s " CPIO_FILESIZE_PRINTF " %s\n", + archive_entry_strmode(entry), + archive_entry_nlink(entry), + archive_entry_uname(entry), + archive_entry_gname(entry), + (CPIO_FILESIZE_TYPE)archive_entry_size(entry), + archive_entry_pathname(entry)); + } else + fprintf(stdout, "%s\n", archive_entry_pathname(entry)); + } + r = archive_read_close(a); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(a)); + if (!cpio->quiet) { + blocks = (archive_position_uncompressed(a) + 511) + / 512; + fprintf(stderr, "%lu %s\n", blocks, + blocks == 1 ? "block" : "blocks"); + } + archive_read_finish(a); + exit(0); +} + +static void +mode_pass(struct cpio *cpio, const char *destdir) +{ + int r; + + /* Ensure target dir has a trailing '/' to simplify path surgery. */ + cpio->destdir = malloc(strlen(destdir) + 8); + strcpy(cpio->destdir, destdir); + if (destdir[strlen(destdir) - 1] != '/') + strcat(cpio->destdir, "/"); + + cpio->archive = archive_write_disk_new(); + if (cpio->archive == NULL) + cpio_errc(1, 0, "Failed to allocate archive object"); + r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(cpio->archive)); + cpio->linkresolver = archive_entry_linkresolver_new(); + archive_write_disk_set_standard_lookup(cpio->archive); + process_lines(cpio, "-", file_to_archive); + + archive_entry_linkresolver_free(cpio->linkresolver); + r = archive_write_close(cpio->archive); + if (r != ARCHIVE_OK) + cpio_errc(1, 0, archive_error_string(cpio->archive)); + archive_write_finish(cpio->archive); +} + +/* + * Prompt for a new name for this entry. Returns a pointer to the + * new name or NULL if the entry should not be copied. This + * implements the semantics defined in POSIX.1-1996, which specifies + * that an input of '.' means the name should be unchanged. GNU cpio + * treats '.' as a literal new name. + */ +static const char * +cpio_rename(const char *name) +{ + static char buff[1024]; + FILE *t; + char *p, *ret; + + t = fopen("/dev/tty", "r+"); + if (t == NULL) + return (name); + fprintf(t, "%s (Enter/./(new name))? ", name); + fflush(t); + + p = fgets(buff, sizeof(buff), t); + fclose(t); + if (p == NULL) + /* End-of-file is a blank line. */ + return (NULL); + + while (*p == ' ' || *p == '\t') + ++p; + if (*p == '\n' || *p == '\0') + /* Empty line. */ + return (NULL); + if (*p == '.' && p[1] == '\n') + /* Single period preserves original name. */ + return (name); + ret = p; + /* Trim the final newline. */ + while (*p != '\0' && *p != '\n') + ++p; + /* Overwrite the final \n with a null character. */ + *p = '\0'; + return (ret); +} + + +/* + * Read lines from file and do something with each one. If option_null + * is set, lines are terminated with zero bytes; otherwise, they're + * terminated with newlines. + * + * This uses a self-sizing buffer to handle arbitrarily-long lines. + * If the "process" function returns non-zero for any line, this + * function will return non-zero after attempting to process all + * remaining lines. + */ +int +process_lines(struct cpio *cpio, const char *pathname, + int (*process)(struct cpio *, const char *)) +{ + FILE *f; + char *buff, *buff_end, *line_start, *line_end, *p; + size_t buff_length, bytes_read, bytes_wanted; + int separator; + int ret; + + separator = cpio->option_null ? '\0' : '\n'; + ret = 0; + + if (strcmp(pathname, "-") == 0) + f = stdin; + else + f = fopen(pathname, "r"); + if (f == NULL) + cpio_errc(1, errno, "Couldn't open %s", pathname); + buff_length = 8192; + buff = malloc(buff_length); + if (buff == NULL) + cpio_errc(1, ENOMEM, "Can't read %s", pathname); + line_start = line_end = buff_end = buff; + for (;;) { + /* Get some more data into the buffer. */ + bytes_wanted = buff + buff_length - buff_end; + bytes_read = fread(buff_end, 1, bytes_wanted, f); + buff_end += bytes_read; + /* Process all complete lines in the buffer. */ + while (line_end < buff_end) { + if (*line_end == separator) { + *line_end = '\0'; + if ((*process)(cpio, line_start) != 0) + ret = -1; + line_start = line_end + 1; + line_end = line_start; + } else + line_end++; + } + if (feof(f)) + break; + if (ferror(f)) + cpio_errc(1, errno, "Can't read %s", pathname); + if (line_start > buff) { + /* Move a leftover fractional line to the beginning. */ + memmove(buff, line_start, buff_end - line_start); + buff_end -= line_start - buff; + line_end -= line_start - buff; + line_start = buff; + } else { + /* Line is too big; enlarge the buffer. */ + p = realloc(buff, buff_length *= 2); + if (p == NULL) + cpio_errc(1, ENOMEM, + "Line too long in %s", pathname); + buff_end = p + (buff_end - buff); + line_end = p + (line_end - buff); + line_start = buff = p; + } + } + /* At end-of-file, handle the final line. */ + if (line_end > line_start) { + *line_end = '\0'; + if ((*process)(cpio, line_start) != 0) + ret = -1; + } + free(buff); + if (f != stdin) + fclose(f); + return (ret); +} |