diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_read_support_format_cpio.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_read_support_format_cpio.c | 1086 |
1 files changed, 1086 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_read_support_format_cpio.c b/src/libs/3rdparty/libarchive/archive_read_support_format_cpio.c new file mode 100644 index 000000000..1c96e6ac1 --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_read_support_format_cpio.c @@ -0,0 +1,1086 @@ +/*- + * Copyright (c) 2003-2007 Tim Kientzle + * Copyright (c) 2010-2012 Michihiro NAKAJIMA + * 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. + * 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 "archive_platform.h" +__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_cpio.c 201163 2009-12-29 05:50:34Z kientzle $"); + +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +/* #include <stdint.h> */ /* See archive_platform.h */ +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif + +#include "archive.h" +#include "archive_entry.h" +#include "archive_entry_locale.h" +#include "archive_private.h" +#include "archive_read_private.h" + +#define bin_magic_offset 0 +#define bin_magic_size 2 +#define bin_dev_offset 2 +#define bin_dev_size 2 +#define bin_ino_offset 4 +#define bin_ino_size 2 +#define bin_mode_offset 6 +#define bin_mode_size 2 +#define bin_uid_offset 8 +#define bin_uid_size 2 +#define bin_gid_offset 10 +#define bin_gid_size 2 +#define bin_nlink_offset 12 +#define bin_nlink_size 2 +#define bin_rdev_offset 14 +#define bin_rdev_size 2 +#define bin_mtime_offset 16 +#define bin_mtime_size 4 +#define bin_namesize_offset 20 +#define bin_namesize_size 2 +#define bin_filesize_offset 22 +#define bin_filesize_size 4 +#define bin_header_size 26 + +#define odc_magic_offset 0 +#define odc_magic_size 6 +#define odc_dev_offset 6 +#define odc_dev_size 6 +#define odc_ino_offset 12 +#define odc_ino_size 6 +#define odc_mode_offset 18 +#define odc_mode_size 6 +#define odc_uid_offset 24 +#define odc_uid_size 6 +#define odc_gid_offset 30 +#define odc_gid_size 6 +#define odc_nlink_offset 36 +#define odc_nlink_size 6 +#define odc_rdev_offset 42 +#define odc_rdev_size 6 +#define odc_mtime_offset 48 +#define odc_mtime_size 11 +#define odc_namesize_offset 59 +#define odc_namesize_size 6 +#define odc_filesize_offset 65 +#define odc_filesize_size 11 +#define odc_header_size 76 + +#define newc_magic_offset 0 +#define newc_magic_size 6 +#define newc_ino_offset 6 +#define newc_ino_size 8 +#define newc_mode_offset 14 +#define newc_mode_size 8 +#define newc_uid_offset 22 +#define newc_uid_size 8 +#define newc_gid_offset 30 +#define newc_gid_size 8 +#define newc_nlink_offset 38 +#define newc_nlink_size 8 +#define newc_mtime_offset 46 +#define newc_mtime_size 8 +#define newc_filesize_offset 54 +#define newc_filesize_size 8 +#define newc_devmajor_offset 62 +#define newc_devmajor_size 8 +#define newc_devminor_offset 70 +#define newc_devminor_size 8 +#define newc_rdevmajor_offset 78 +#define newc_rdevmajor_size 8 +#define newc_rdevminor_offset 86 +#define newc_rdevminor_size 8 +#define newc_namesize_offset 94 +#define newc_namesize_size 8 +#define newc_checksum_offset 102 +#define newc_checksum_size 8 +#define newc_header_size 110 + +/* + * An afio large ASCII header, which they named itself. + * afio utility uses this header, if a file size is larger than 2G bytes + * or inode/uid/gid is bigger than 65535(0xFFFF) or mtime is bigger than + * 0x7fffffff, which we cannot record to odc header because of its limit. + * If not, uses odc header. + */ +#define afiol_magic_offset 0 +#define afiol_magic_size 6 +#define afiol_dev_offset 6 +#define afiol_dev_size 8 /* hex */ +#define afiol_ino_offset 14 +#define afiol_ino_size 16 /* hex */ +#define afiol_ino_m_offset 30 /* 'm' */ +#define afiol_mode_offset 31 +#define afiol_mode_size 6 /* oct */ +#define afiol_uid_offset 37 +#define afiol_uid_size 8 /* hex */ +#define afiol_gid_offset 45 +#define afiol_gid_size 8 /* hex */ +#define afiol_nlink_offset 53 +#define afiol_nlink_size 8 /* hex */ +#define afiol_rdev_offset 61 +#define afiol_rdev_size 8 /* hex */ +#define afiol_mtime_offset 69 +#define afiol_mtime_size 16 /* hex */ +#define afiol_mtime_n_offset 85 /* 'n' */ +#define afiol_namesize_offset 86 +#define afiol_namesize_size 4 /* hex */ +#define afiol_flag_offset 90 +#define afiol_flag_size 4 /* hex */ +#define afiol_xsize_offset 94 +#define afiol_xsize_size 4 /* hex */ +#define afiol_xsize_s_offset 98 /* 's' */ +#define afiol_filesize_offset 99 +#define afiol_filesize_size 16 /* hex */ +#define afiol_filesize_c_offset 115 /* ':' */ +#define afiol_header_size 116 + + +struct links_entry { + struct links_entry *next; + struct links_entry *previous; + unsigned int links; + dev_t dev; + int64_t ino; + char *name; +}; + +#define CPIO_MAGIC 0x13141516 +struct cpio { + int magic; + int (*read_header)(struct archive_read *, struct cpio *, + struct archive_entry *, size_t *, size_t *); + struct links_entry *links_head; + int64_t entry_bytes_remaining; + int64_t entry_bytes_unconsumed; + int64_t entry_offset; + int64_t entry_padding; + + struct archive_string_conv *opt_sconv; + struct archive_string_conv *sconv_default; + int init_default_conversion; +}; + +static int64_t atol16(const char *, unsigned); +static int64_t atol8(const char *, unsigned); +static int archive_read_format_cpio_bid(struct archive_read *, int); +static int archive_read_format_cpio_options(struct archive_read *, + const char *, const char *); +static int archive_read_format_cpio_cleanup(struct archive_read *); +static int archive_read_format_cpio_read_data(struct archive_read *, + const void **, size_t *, int64_t *); +static int archive_read_format_cpio_read_header(struct archive_read *, + struct archive_entry *); +static int archive_read_format_cpio_skip(struct archive_read *); +static int64_t be4(const unsigned char *); +static int find_odc_header(struct archive_read *); +static int find_newc_header(struct archive_read *); +static int header_bin_be(struct archive_read *, struct cpio *, + struct archive_entry *, size_t *, size_t *); +static int header_bin_le(struct archive_read *, struct cpio *, + struct archive_entry *, size_t *, size_t *); +static int header_newc(struct archive_read *, struct cpio *, + struct archive_entry *, size_t *, size_t *); +static int header_odc(struct archive_read *, struct cpio *, + struct archive_entry *, size_t *, size_t *); +static int header_afiol(struct archive_read *, struct cpio *, + struct archive_entry *, size_t *, size_t *); +static int is_octal(const char *, size_t); +static int is_hex(const char *, size_t); +static int64_t le4(const unsigned char *); +static int record_hardlink(struct archive_read *a, + struct cpio *cpio, struct archive_entry *entry); + +int +archive_read_support_format_cpio(struct archive *_a) +{ + struct archive_read *a = (struct archive_read *)_a; + struct cpio *cpio; + int r; + + archive_check_magic(_a, ARCHIVE_READ_MAGIC, + ARCHIVE_STATE_NEW, "archive_read_support_format_cpio"); + + cpio = (struct cpio *)calloc(1, sizeof(*cpio)); + if (cpio == NULL) { + archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data"); + return (ARCHIVE_FATAL); + } + cpio->magic = CPIO_MAGIC; + + r = __archive_read_register_format(a, + cpio, + "cpio", + archive_read_format_cpio_bid, + archive_read_format_cpio_options, + archive_read_format_cpio_read_header, + archive_read_format_cpio_read_data, + archive_read_format_cpio_skip, + NULL, + archive_read_format_cpio_cleanup, + NULL, + NULL); + + if (r != ARCHIVE_OK) + free(cpio); + return (ARCHIVE_OK); +} + + +static int +archive_read_format_cpio_bid(struct archive_read *a, int best_bid) +{ + const unsigned char *p; + struct cpio *cpio; + int bid; + + (void)best_bid; /* UNUSED */ + + cpio = (struct cpio *)(a->format->data); + + if ((p = __archive_read_ahead(a, 6, NULL)) == NULL) + return (-1); + + bid = 0; + if (memcmp(p, "070707", 6) == 0) { + /* ASCII cpio archive (odc, POSIX.1) */ + cpio->read_header = header_odc; + bid += 48; + /* + * XXX TODO: More verification; Could check that only octal + * digits appear in appropriate header locations. XXX + */ + } else if (memcmp(p, "070727", 6) == 0) { + /* afio large ASCII cpio archive */ + cpio->read_header = header_odc; + bid += 48; + /* + * XXX TODO: More verification; Could check that almost hex + * digits appear in appropriate header locations. XXX + */ + } else if (memcmp(p, "070701", 6) == 0) { + /* ASCII cpio archive (SVR4 without CRC) */ + cpio->read_header = header_newc; + bid += 48; + /* + * XXX TODO: More verification; Could check that only hex + * digits appear in appropriate header locations. XXX + */ + } else if (memcmp(p, "070702", 6) == 0) { + /* ASCII cpio archive (SVR4 with CRC) */ + /* XXX TODO: Flag that we should check the CRC. XXX */ + cpio->read_header = header_newc; + bid += 48; + /* + * XXX TODO: More verification; Could check that only hex + * digits appear in appropriate header locations. XXX + */ + } else if (p[0] * 256 + p[1] == 070707) { + /* big-endian binary cpio archives */ + cpio->read_header = header_bin_be; + bid += 16; + /* Is more verification possible here? */ + } else if (p[0] + p[1] * 256 == 070707) { + /* little-endian binary cpio archives */ + cpio->read_header = header_bin_le; + bid += 16; + /* Is more verification possible here? */ + } else + return (ARCHIVE_WARN); + + return (bid); +} + +static int +archive_read_format_cpio_options(struct archive_read *a, + const char *key, const char *val) +{ + struct cpio *cpio; + int ret = ARCHIVE_FAILED; + + cpio = (struct cpio *)(a->format->data); + if (strcmp(key, "compat-2x") == 0) { + /* Handle filenames as libarchive 2.x */ + cpio->init_default_conversion = (val != NULL)?1:0; + return (ARCHIVE_OK); + } else if (strcmp(key, "hdrcharset") == 0) { + if (val == NULL || val[0] == 0) + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "cpio: hdrcharset option needs a character-set name"); + else { + cpio->opt_sconv = + archive_string_conversion_from_charset( + &a->archive, val, 0); + if (cpio->opt_sconv != NULL) + ret = ARCHIVE_OK; + else + ret = ARCHIVE_FATAL; + } + return (ret); + } + + /* Note: The "warn" return is just to inform the options + * supervisor that we didn't handle it. It will generate + * a suitable error if no one used this option. */ + return (ARCHIVE_WARN); +} + +static int +archive_read_format_cpio_read_header(struct archive_read *a, + struct archive_entry *entry) +{ + struct cpio *cpio; + const void *h, *hl; + struct archive_string_conv *sconv; + size_t namelength; + size_t name_pad; + int r; + + cpio = (struct cpio *)(a->format->data); + sconv = cpio->opt_sconv; + if (sconv == NULL) { + if (!cpio->init_default_conversion) { + cpio->sconv_default = + archive_string_default_conversion_for_read( + &(a->archive)); + cpio->init_default_conversion = 1; + } + sconv = cpio->sconv_default; + } + + r = (cpio->read_header(a, cpio, entry, &namelength, &name_pad)); + + if (r < ARCHIVE_WARN) + return (r); + + /* Read name from buffer. */ + h = __archive_read_ahead(a, namelength + name_pad, NULL); + if (h == NULL) + return (ARCHIVE_FATAL); + if (archive_entry_copy_pathname_l(entry, + (const char *)h, namelength, sconv) != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Pathname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Pathname can't be converted from %s to current locale.", + archive_string_conversion_charset_name(sconv)); + r = ARCHIVE_WARN; + } + cpio->entry_offset = 0; + + __archive_read_consume(a, namelength + name_pad); + + /* If this is a symlink, read the link contents. */ + if (archive_entry_filetype(entry) == AE_IFLNK) { + if (cpio->entry_bytes_remaining > 1024 * 1024) { + archive_set_error(&a->archive, ENOMEM, + "Rejecting malformed cpio archive: symlink contents exceed 1 megabyte"); + return (ARCHIVE_FATAL); + } + hl = __archive_read_ahead(a, + (size_t)cpio->entry_bytes_remaining, NULL); + if (hl == NULL) + return (ARCHIVE_FATAL); + if (archive_entry_copy_symlink_l(entry, (const char *)hl, + (size_t)cpio->entry_bytes_remaining, sconv) != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Linkname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, + ARCHIVE_ERRNO_FILE_FORMAT, + "Linkname can't be converted from %s to " + "current locale.", + archive_string_conversion_charset_name(sconv)); + r = ARCHIVE_WARN; + } + __archive_read_consume(a, cpio->entry_bytes_remaining); + cpio->entry_bytes_remaining = 0; + } + + /* XXX TODO: If the full mode is 0160200, then this is a Solaris + * ACL description for the following entry. Read this body + * and parse it as a Solaris-style ACL, then read the next + * header. XXX */ + + /* Compare name to "TRAILER!!!" to test for end-of-archive. */ + if (namelength == 11 && strncmp((const char *)h, "TRAILER!!!", + 11) == 0) { + /* TODO: Store file location of start of block. */ + archive_clear_error(&a->archive); + return (ARCHIVE_EOF); + } + + /* Detect and record hardlinks to previously-extracted entries. */ + if (record_hardlink(a, cpio, entry) != ARCHIVE_OK) { + return (ARCHIVE_FATAL); + } + + return (r); +} + +static int +archive_read_format_cpio_read_data(struct archive_read *a, + const void **buff, size_t *size, int64_t *offset) +{ + ssize_t bytes_read; + struct cpio *cpio; + + cpio = (struct cpio *)(a->format->data); + + if (cpio->entry_bytes_unconsumed) { + __archive_read_consume(a, cpio->entry_bytes_unconsumed); + cpio->entry_bytes_unconsumed = 0; + } + + if (cpio->entry_bytes_remaining > 0) { + *buff = __archive_read_ahead(a, 1, &bytes_read); + if (bytes_read <= 0) + return (ARCHIVE_FATAL); + if (bytes_read > cpio->entry_bytes_remaining) + bytes_read = (ssize_t)cpio->entry_bytes_remaining; + *size = bytes_read; + cpio->entry_bytes_unconsumed = bytes_read; + *offset = cpio->entry_offset; + cpio->entry_offset += bytes_read; + cpio->entry_bytes_remaining -= bytes_read; + return (ARCHIVE_OK); + } else { + if (cpio->entry_padding != + __archive_read_consume(a, cpio->entry_padding)) { + return (ARCHIVE_FATAL); + } + cpio->entry_padding = 0; + *buff = NULL; + *size = 0; + *offset = cpio->entry_offset; + return (ARCHIVE_EOF); + } +} + +static int +archive_read_format_cpio_skip(struct archive_read *a) +{ + struct cpio *cpio = (struct cpio *)(a->format->data); + int64_t to_skip = cpio->entry_bytes_remaining + cpio->entry_padding + + cpio->entry_bytes_unconsumed; + + if (to_skip != __archive_read_consume(a, to_skip)) { + return (ARCHIVE_FATAL); + } + cpio->entry_bytes_remaining = 0; + cpio->entry_padding = 0; + cpio->entry_bytes_unconsumed = 0; + return (ARCHIVE_OK); +} + +/* + * Skip forward to the next cpio newc header by searching for the + * 07070[12] string. This should be generalized and merged with + * find_odc_header below. + */ +static int +is_hex(const char *p, size_t len) +{ + while (len-- > 0) { + if ((*p >= '0' && *p <= '9') + || (*p >= 'a' && *p <= 'f') + || (*p >= 'A' && *p <= 'F')) + ++p; + else + return (0); + } + return (1); +} + +static int +find_newc_header(struct archive_read *a) +{ + const void *h; + const char *p, *q; + size_t skip, skipped = 0; + ssize_t bytes; + + for (;;) { + h = __archive_read_ahead(a, newc_header_size, &bytes); + if (h == NULL) + return (ARCHIVE_FATAL); + p = h; + q = p + bytes; + + /* Try the typical case first, then go into the slow search.*/ + if (memcmp("07070", p, 5) == 0 + && (p[5] == '1' || p[5] == '2') + && is_hex(p, newc_header_size)) + return (ARCHIVE_OK); + + /* + * Scan ahead until we find something that looks + * like a newc header. + */ + while (p + newc_header_size <= q) { + switch (p[5]) { + case '1': + case '2': + if (memcmp("07070", p, 5) == 0 + && is_hex(p, newc_header_size)) { + skip = p - (const char *)h; + __archive_read_consume(a, skip); + skipped += skip; + if (skipped > 0) { + archive_set_error(&a->archive, + 0, + "Skipped %d bytes before " + "finding valid header", + (int)skipped); + return (ARCHIVE_WARN); + } + return (ARCHIVE_OK); + } + p += 2; + break; + case '0': + p++; + break; + default: + p += 6; + break; + } + } + skip = p - (const char *)h; + __archive_read_consume(a, skip); + skipped += skip; + } +} + +static int +header_newc(struct archive_read *a, struct cpio *cpio, + struct archive_entry *entry, size_t *namelength, size_t *name_pad) +{ + const void *h; + const char *header; + int r; + + r = find_newc_header(a); + if (r < ARCHIVE_WARN) + return (r); + + /* Read fixed-size portion of header. */ + h = __archive_read_ahead(a, newc_header_size, NULL); + if (h == NULL) + return (ARCHIVE_FATAL); + + /* Parse out hex fields. */ + header = (const char *)h; + + if (memcmp(header + newc_magic_offset, "070701", 6) == 0) { + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC; + a->archive.archive_format_name = "ASCII cpio (SVR4 with no CRC)"; + } else if (memcmp(header + newc_magic_offset, "070702", 6) == 0) { + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_CRC; + a->archive.archive_format_name = "ASCII cpio (SVR4 with CRC)"; + } else { + /* TODO: Abort here? */ + } + + archive_entry_set_devmajor(entry, + (dev_t)atol16(header + newc_devmajor_offset, newc_devmajor_size)); + archive_entry_set_devminor(entry, + (dev_t)atol16(header + newc_devminor_offset, newc_devminor_size)); + archive_entry_set_ino(entry, atol16(header + newc_ino_offset, newc_ino_size)); + archive_entry_set_mode(entry, + (mode_t)atol16(header + newc_mode_offset, newc_mode_size)); + archive_entry_set_uid(entry, atol16(header + newc_uid_offset, newc_uid_size)); + archive_entry_set_gid(entry, atol16(header + newc_gid_offset, newc_gid_size)); + archive_entry_set_nlink(entry, + (unsigned int)atol16(header + newc_nlink_offset, newc_nlink_size)); + archive_entry_set_rdevmajor(entry, + (dev_t)atol16(header + newc_rdevmajor_offset, newc_rdevmajor_size)); + archive_entry_set_rdevminor(entry, + (dev_t)atol16(header + newc_rdevminor_offset, newc_rdevminor_size)); + archive_entry_set_mtime(entry, atol16(header + newc_mtime_offset, newc_mtime_size), 0); + *namelength = (size_t)atol16(header + newc_namesize_offset, newc_namesize_size); + /* Pad name to 2 more than a multiple of 4. */ + *name_pad = (2 - *namelength) & 3; + + /* Make sure that the padded name length fits into size_t. */ + if (*name_pad > SIZE_MAX - *namelength) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "cpio archive has invalid namelength"); + return (ARCHIVE_FATAL); + } + + /* + * Note: entry_bytes_remaining is at least 64 bits and + * therefore guaranteed to be big enough for a 33-bit file + * size. + */ + cpio->entry_bytes_remaining = + atol16(header + newc_filesize_offset, newc_filesize_size); + archive_entry_set_size(entry, cpio->entry_bytes_remaining); + /* Pad file contents to a multiple of 4. */ + cpio->entry_padding = 3 & -cpio->entry_bytes_remaining; + __archive_read_consume(a, newc_header_size); + return (r); +} + +/* + * Skip forward to the next cpio odc header by searching for the + * 070707 string. This is a hand-optimized search that could + * probably be easily generalized to handle all character-based + * cpio variants. + */ +static int +is_octal(const char *p, size_t len) +{ + while (len-- > 0) { + if (*p < '0' || *p > '7') + return (0); + ++p; + } + return (1); +} + +static int +is_afio_large(const char *h, size_t len) +{ + if (len < afiol_header_size) + return (0); + if (h[afiol_ino_m_offset] != 'm' + || h[afiol_mtime_n_offset] != 'n' + || h[afiol_xsize_s_offset] != 's' + || h[afiol_filesize_c_offset] != ':') + return (0); + if (!is_hex(h + afiol_dev_offset, afiol_ino_m_offset - afiol_dev_offset)) + return (0); + if (!is_hex(h + afiol_mode_offset, afiol_mtime_n_offset - afiol_mode_offset)) + return (0); + if (!is_hex(h + afiol_namesize_offset, afiol_xsize_s_offset - afiol_namesize_offset)) + return (0); + if (!is_hex(h + afiol_filesize_offset, afiol_filesize_size)) + return (0); + return (1); +} + +static int +find_odc_header(struct archive_read *a) +{ + const void *h; + const char *p, *q; + size_t skip, skipped = 0; + ssize_t bytes; + + for (;;) { + h = __archive_read_ahead(a, odc_header_size, &bytes); + if (h == NULL) + return (ARCHIVE_FATAL); + p = h; + q = p + bytes; + + /* Try the typical case first, then go into the slow search.*/ + if (memcmp("070707", p, 6) == 0 && is_octal(p, odc_header_size)) + return (ARCHIVE_OK); + if (memcmp("070727", p, 6) == 0 && is_afio_large(p, bytes)) { + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_AFIO_LARGE; + return (ARCHIVE_OK); + } + + /* + * Scan ahead until we find something that looks + * like an odc header. + */ + while (p + odc_header_size <= q) { + switch (p[5]) { + case '7': + if ((memcmp("070707", p, 6) == 0 + && is_octal(p, odc_header_size)) + || (memcmp("070727", p, 6) == 0 + && is_afio_large(p, q - p))) { + skip = p - (const char *)h; + __archive_read_consume(a, skip); + skipped += skip; + if (p[4] == '2') + a->archive.archive_format = + ARCHIVE_FORMAT_CPIO_AFIO_LARGE; + if (skipped > 0) { + archive_set_error(&a->archive, + 0, + "Skipped %d bytes before " + "finding valid header", + (int)skipped); + return (ARCHIVE_WARN); + } + return (ARCHIVE_OK); + } + p += 2; + break; + case '0': + p++; + break; + default: + p += 6; + break; + } + } + skip = p - (const char *)h; + __archive_read_consume(a, skip); + skipped += skip; + } +} + +static int +header_odc(struct archive_read *a, struct cpio *cpio, + struct archive_entry *entry, size_t *namelength, size_t *name_pad) +{ + const void *h; + int r; + const char *header; + + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX; + a->archive.archive_format_name = "POSIX octet-oriented cpio"; + + /* Find the start of the next header. */ + r = find_odc_header(a); + if (r < ARCHIVE_WARN) + return (r); + + if (a->archive.archive_format == ARCHIVE_FORMAT_CPIO_AFIO_LARGE) { + int r2 = (header_afiol(a, cpio, entry, namelength, name_pad)); + if (r2 == ARCHIVE_OK) + return (r); + else + return (r2); + } + + /* Read fixed-size portion of header. */ + h = __archive_read_ahead(a, odc_header_size, NULL); + if (h == NULL) + return (ARCHIVE_FATAL); + + /* Parse out octal fields. */ + header = (const char *)h; + + archive_entry_set_dev(entry, + (dev_t)atol8(header + odc_dev_offset, odc_dev_size)); + archive_entry_set_ino(entry, atol8(header + odc_ino_offset, odc_ino_size)); + archive_entry_set_mode(entry, + (mode_t)atol8(header + odc_mode_offset, odc_mode_size)); + archive_entry_set_uid(entry, atol8(header + odc_uid_offset, odc_uid_size)); + archive_entry_set_gid(entry, atol8(header + odc_gid_offset, odc_gid_size)); + archive_entry_set_nlink(entry, + (unsigned int)atol8(header + odc_nlink_offset, odc_nlink_size)); + archive_entry_set_rdev(entry, + (dev_t)atol8(header + odc_rdev_offset, odc_rdev_size)); + archive_entry_set_mtime(entry, atol8(header + odc_mtime_offset, odc_mtime_size), 0); + *namelength = (size_t)atol8(header + odc_namesize_offset, odc_namesize_size); + *name_pad = 0; /* No padding of filename. */ + + /* + * Note: entry_bytes_remaining is at least 64 bits and + * therefore guaranteed to be big enough for a 33-bit file + * size. + */ + cpio->entry_bytes_remaining = + atol8(header + odc_filesize_offset, odc_filesize_size); + archive_entry_set_size(entry, cpio->entry_bytes_remaining); + cpio->entry_padding = 0; + __archive_read_consume(a, odc_header_size); + return (r); +} + +/* + * NOTE: if a filename suffix is ".z", it is the file gziped by afio. + * it would be nice that we can show uncompressed file size and we can + * uncompressed file contents automatically, unfortunately we have nothing + * to get a uncompressed file size while reading each header. It means + * we also cannot uncompress file contents under our framework. + */ +static int +header_afiol(struct archive_read *a, struct cpio *cpio, + struct archive_entry *entry, size_t *namelength, size_t *name_pad) +{ + const void *h; + const char *header; + + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_AFIO_LARGE; + a->archive.archive_format_name = "afio large ASCII"; + + /* Read fixed-size portion of header. */ + h = __archive_read_ahead(a, afiol_header_size, NULL); + if (h == NULL) + return (ARCHIVE_FATAL); + + /* Parse out octal fields. */ + header = (const char *)h; + + archive_entry_set_dev(entry, + (dev_t)atol16(header + afiol_dev_offset, afiol_dev_size)); + archive_entry_set_ino(entry, atol16(header + afiol_ino_offset, afiol_ino_size)); + archive_entry_set_mode(entry, + (mode_t)atol8(header + afiol_mode_offset, afiol_mode_size)); + archive_entry_set_uid(entry, atol16(header + afiol_uid_offset, afiol_uid_size)); + archive_entry_set_gid(entry, atol16(header + afiol_gid_offset, afiol_gid_size)); + archive_entry_set_nlink(entry, + (unsigned int)atol16(header + afiol_nlink_offset, afiol_nlink_size)); + archive_entry_set_rdev(entry, + (dev_t)atol16(header + afiol_rdev_offset, afiol_rdev_size)); + archive_entry_set_mtime(entry, atol16(header + afiol_mtime_offset, afiol_mtime_size), 0); + *namelength = (size_t)atol16(header + afiol_namesize_offset, afiol_namesize_size); + *name_pad = 0; /* No padding of filename. */ + + cpio->entry_bytes_remaining = + atol16(header + afiol_filesize_offset, afiol_filesize_size); + archive_entry_set_size(entry, cpio->entry_bytes_remaining); + cpio->entry_padding = 0; + __archive_read_consume(a, afiol_header_size); + return (ARCHIVE_OK); +} + + +static int +header_bin_le(struct archive_read *a, struct cpio *cpio, + struct archive_entry *entry, size_t *namelength, size_t *name_pad) +{ + const void *h; + const unsigned char *header; + + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_LE; + a->archive.archive_format_name = "cpio (little-endian binary)"; + + /* Read fixed-size portion of header. */ + h = __archive_read_ahead(a, bin_header_size, NULL); + if (h == NULL) { + archive_set_error(&a->archive, 0, + "End of file trying to read next cpio header"); + return (ARCHIVE_FATAL); + } + + /* Parse out binary fields. */ + header = (const unsigned char *)h; + + archive_entry_set_dev(entry, header[bin_dev_offset] + header[bin_dev_offset + 1] * 256); + archive_entry_set_ino(entry, header[bin_ino_offset] + header[bin_ino_offset + 1] * 256); + archive_entry_set_mode(entry, header[bin_mode_offset] + header[bin_mode_offset + 1] * 256); + archive_entry_set_uid(entry, header[bin_uid_offset] + header[bin_uid_offset + 1] * 256); + archive_entry_set_gid(entry, header[bin_gid_offset] + header[bin_gid_offset + 1] * 256); + archive_entry_set_nlink(entry, header[bin_nlink_offset] + header[bin_nlink_offset + 1] * 256); + archive_entry_set_rdev(entry, header[bin_rdev_offset] + header[bin_rdev_offset + 1] * 256); + archive_entry_set_mtime(entry, le4(header + bin_mtime_offset), 0); + *namelength = header[bin_namesize_offset] + header[bin_namesize_offset + 1] * 256; + *name_pad = *namelength & 1; /* Pad to even. */ + + cpio->entry_bytes_remaining = le4(header + bin_filesize_offset); + archive_entry_set_size(entry, cpio->entry_bytes_remaining); + cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ + __archive_read_consume(a, bin_header_size); + return (ARCHIVE_OK); +} + +static int +header_bin_be(struct archive_read *a, struct cpio *cpio, + struct archive_entry *entry, size_t *namelength, size_t *name_pad) +{ + const void *h; + const unsigned char *header; + + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_BE; + a->archive.archive_format_name = "cpio (big-endian binary)"; + + /* Read fixed-size portion of header. */ + h = __archive_read_ahead(a, bin_header_size, NULL); + if (h == NULL) { + archive_set_error(&a->archive, 0, + "End of file trying to read next cpio header"); + return (ARCHIVE_FATAL); + } + + /* Parse out binary fields. */ + header = (const unsigned char *)h; + + archive_entry_set_dev(entry, header[bin_dev_offset] * 256 + header[bin_dev_offset + 1]); + archive_entry_set_ino(entry, header[bin_ino_offset] * 256 + header[bin_ino_offset + 1]); + archive_entry_set_mode(entry, header[bin_mode_offset] * 256 + header[bin_mode_offset + 1]); + archive_entry_set_uid(entry, header[bin_uid_offset] * 256 + header[bin_uid_offset + 1]); + archive_entry_set_gid(entry, header[bin_gid_offset] * 256 + header[bin_gid_offset + 1]); + archive_entry_set_nlink(entry, header[bin_nlink_offset] * 256 + header[bin_nlink_offset + 1]); + archive_entry_set_rdev(entry, header[bin_rdev_offset] * 256 + header[bin_rdev_offset + 1]); + archive_entry_set_mtime(entry, be4(header + bin_mtime_offset), 0); + *namelength = header[bin_namesize_offset] * 256 + header[bin_namesize_offset + 1]; + *name_pad = *namelength & 1; /* Pad to even. */ + + cpio->entry_bytes_remaining = be4(header + bin_filesize_offset); + archive_entry_set_size(entry, cpio->entry_bytes_remaining); + cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ + __archive_read_consume(a, bin_header_size); + return (ARCHIVE_OK); +} + +static int +archive_read_format_cpio_cleanup(struct archive_read *a) +{ + struct cpio *cpio; + + cpio = (struct cpio *)(a->format->data); + /* Free inode->name map */ + while (cpio->links_head != NULL) { + struct links_entry *lp = cpio->links_head->next; + + free(cpio->links_head->name); + free(cpio->links_head); + cpio->links_head = lp; + } + free(cpio); + (a->format->data) = NULL; + return (ARCHIVE_OK); +} + +static int64_t +le4(const unsigned char *p) +{ + return ((p[0] << 16) + (((int64_t)p[1]) << 24) + (p[2] << 0) + (p[3] << 8)); +} + + +static int64_t +be4(const unsigned char *p) +{ + return ((((int64_t)p[0]) << 24) + (p[1] << 16) + (p[2] << 8) + (p[3])); +} + +/* + * Note that this implementation does not (and should not!) obey + * locale settings; you cannot simply substitute strtol here, since + * it does obey locale. + */ +static int64_t +atol8(const char *p, unsigned char_cnt) +{ + int64_t l; + int digit; + + l = 0; + while (char_cnt-- > 0) { + if (*p >= '0' && *p <= '7') + digit = *p - '0'; + else + return (l); + p++; + l <<= 3; + l |= digit; + } + return (l); +} + +static int64_t +atol16(const char *p, unsigned char_cnt) +{ + int64_t l; + int digit; + + l = 0; + while (char_cnt-- > 0) { + if (*p >= 'a' && *p <= 'f') + digit = *p - 'a' + 10; + else if (*p >= 'A' && *p <= 'F') + digit = *p - 'A' + 10; + else if (*p >= '0' && *p <= '9') + digit = *p - '0'; + else + return (l); + p++; + l <<= 4; + l |= digit; + } + return (l); +} + +static int +record_hardlink(struct archive_read *a, + struct cpio *cpio, struct archive_entry *entry) +{ + struct links_entry *le; + dev_t dev; + int64_t ino; + + if (archive_entry_nlink(entry) <= 1) + return (ARCHIVE_OK); + + dev = archive_entry_dev(entry); + ino = archive_entry_ino64(entry); + + /* + * First look in the list of multiply-linked files. If we've + * already dumped it, convert this entry to a hard link entry. + */ + for (le = cpio->links_head; le; le = le->next) { + if (le->dev == dev && le->ino == ino) { + archive_entry_copy_hardlink(entry, le->name); + + if (--le->links <= 0) { + if (le->previous != NULL) + le->previous->next = le->next; + if (le->next != NULL) + le->next->previous = le->previous; + if (cpio->links_head == le) + cpio->links_head = le->next; + free(le->name); + free(le); + } + + return (ARCHIVE_OK); + } + } + + le = (struct links_entry *)malloc(sizeof(struct links_entry)); + if (le == NULL) { + archive_set_error(&a->archive, + ENOMEM, "Out of memory adding file to list"); + return (ARCHIVE_FATAL); + } + if (cpio->links_head != NULL) + cpio->links_head->previous = le; + le->next = cpio->links_head; + le->previous = NULL; + cpio->links_head = le; + le->dev = dev; + le->ino = ino; + le->links = archive_entry_nlink(entry) - 1; + le->name = strdup(archive_entry_pathname(entry)); + if (le->name == NULL) { + archive_set_error(&a->archive, + ENOMEM, "Out of memory adding file to list"); + return (ARCHIVE_FATAL); + } + + return (ARCHIVE_OK); +} |