aa1eeda578
* Actually use the HAVE_<header>_H macros to conditionally include
system headers. They've been defined for a long time, but only
used in a few places. Now they're used pretty consistently
throughout.
* Fill in a lot of missing casts for conversions from void*.
Although Standard C doesn't require this, some people have been
trying to use C++ compilers with this code, and they do require it.
Bit-for-bit, the compiled object files are identical, except for
one assert() whose line number changed, so I'm pretty confident I
didn't break anything. ;-)
509 lines
14 KiB
C
509 lines
14 KiB
C
/*-
|
|
* Copyright (c) 2003-2004 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 "archive_platform.h"
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#ifdef HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#ifdef MAJOR_IN_MKDEV
|
|
#include <sys/mkdev.h>
|
|
#else
|
|
#ifdef MAJOR_IN_SYSMACROS
|
|
#include <sys/sysmacros.h>
|
|
#endif
|
|
#endif
|
|
#ifdef HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
#include <stdio.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_private.h"
|
|
|
|
struct ustar {
|
|
uint64_t entry_bytes_remaining;
|
|
uint64_t entry_padding;
|
|
char written;
|
|
};
|
|
|
|
/*
|
|
* Define structure of POSIX 'ustar' tar header.
|
|
*/
|
|
struct archive_entry_header_ustar {
|
|
char name[100];
|
|
char mode[6];
|
|
char mode_padding[2];
|
|
char uid[6];
|
|
char uid_padding[2];
|
|
char gid[6];
|
|
char gid_padding[2];
|
|
char size[11];
|
|
char size_padding[1];
|
|
char mtime[11];
|
|
char mtime_padding[1];
|
|
char checksum[8];
|
|
char typeflag[1];
|
|
char linkname[100];
|
|
char magic[6]; /* For POSIX: "ustar\0" */
|
|
char version[2]; /* For POSIX: "00" */
|
|
char uname[32];
|
|
char gname[32];
|
|
char rdevmajor[6];
|
|
char rdevmajor_padding[2];
|
|
char rdevminor[6];
|
|
char rdevminor_padding[2];
|
|
char prefix[155];
|
|
char padding[12];
|
|
};
|
|
|
|
/*
|
|
* A filled-in copy of the header for initialization.
|
|
*/
|
|
static const struct archive_entry_header_ustar template_header = {
|
|
{ "" }, /* name */
|
|
{ '0','0','0','0','0','0' }, { ' ', '\0' }, /* mode, space-null term.*/
|
|
{ '0','0','0','0','0','0' }, { ' ', '\0' }, /* uid, space-null term. */
|
|
{ '0','0','0','0','0','0' }, { ' ', '\0' }, /* gid, space-null term. */
|
|
{ '0','0','0','0','0','0','0','0','0','0','0' }, { ' ' },
|
|
/* size, space termination. */
|
|
{ '0','0','0','0','0','0','0','0','0','0','0' }, { ' ' },
|
|
/* mtime, space termination. */
|
|
{ ' ',' ',' ',' ',' ',' ',' ',' ' }, /* Initial checksum value. */
|
|
{ '0' }, /* default: regular file */
|
|
{ "" }, /* linkname */
|
|
{ 'u','s','t','a','r' }, /* magic */
|
|
{ '0', '0' }, /* version */
|
|
{ "" }, /* uname */
|
|
{ "" }, /* gname */
|
|
{ '0','0','0','0','0','0' }, { ' ', '\0' }, /* rdevmajor, space-null */
|
|
{ '0','0','0','0','0','0' }, { ' ', '\0' }, /* rdevminor, space-null */
|
|
{ "" }, /* prefix */
|
|
{ "" } /* padding */
|
|
};
|
|
|
|
static int archive_write_ustar_data(struct archive *a, const void *buff,
|
|
size_t s);
|
|
static int archive_write_ustar_finish(struct archive *);
|
|
static int archive_write_ustar_finish_entry(struct archive *);
|
|
static int archive_write_ustar_header(struct archive *,
|
|
struct archive_entry *entry);
|
|
static int format_256(int64_t, char *, int);
|
|
static int format_number(int64_t, char *, int size, int max, int strict);
|
|
static int format_octal(int64_t, char *, int);
|
|
static int write_nulls(struct archive *a, size_t);
|
|
|
|
/*
|
|
* Set output format to 'ustar' format.
|
|
*/
|
|
int
|
|
archive_write_set_format_ustar(struct archive *a)
|
|
{
|
|
struct ustar *ustar;
|
|
|
|
/* If someone else was already registered, unregister them. */
|
|
if (a->format_finish != NULL)
|
|
(a->format_finish)(a);
|
|
|
|
ustar = (struct ustar *)malloc(sizeof(*ustar));
|
|
if (ustar == NULL) {
|
|
archive_set_error(a, ENOMEM, "Can't allocate ustar data");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
memset(ustar, 0, sizeof(*ustar));
|
|
a->format_data = ustar;
|
|
|
|
a->pad_uncompressed = 1; /* Mimic gtar in this respect. */
|
|
a->format_write_header = archive_write_ustar_header;
|
|
a->format_write_data = archive_write_ustar_data;
|
|
a->format_finish = archive_write_ustar_finish;
|
|
a->format_finish_entry = archive_write_ustar_finish_entry;
|
|
a->archive_format = ARCHIVE_FORMAT_TAR_USTAR;
|
|
a->archive_format_name = "POSIX ustar";
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_header(struct archive *a, struct archive_entry *entry)
|
|
{
|
|
char buff[512];
|
|
int ret;
|
|
struct ustar *ustar;
|
|
|
|
ustar = (struct ustar *)a->format_data;
|
|
ustar->written = 1;
|
|
|
|
/* Only regular files (not hardlinks) have data. */
|
|
if (archive_entry_hardlink(entry) != NULL ||
|
|
archive_entry_symlink(entry) != NULL ||
|
|
!S_ISREG(archive_entry_mode(entry)))
|
|
archive_entry_set_size(entry, 0);
|
|
|
|
ret = __archive_write_format_header_ustar(a, buff, entry, -1, 1);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
ret = (a->compression_write)(a, buff, 512);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
|
|
ustar->entry_bytes_remaining = archive_entry_size(entry);
|
|
ustar->entry_padding = 0x1ff & (- ustar->entry_bytes_remaining);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* Format a basic 512-byte "ustar" header.
|
|
*
|
|
* Returns -1 if format failed (due to field overflow).
|
|
* Note that this always formats as much of the header as possible.
|
|
* If "strict" is set to zero, it will extend numeric fields as
|
|
* necessary (overwriting terminators or using base-256 extensions).
|
|
*
|
|
* This is exported so that other 'tar' formats can use it.
|
|
*/
|
|
int
|
|
__archive_write_format_header_ustar(struct archive *a, char buff[512],
|
|
struct archive_entry *entry, int tartype, int strict)
|
|
{
|
|
unsigned int checksum;
|
|
struct archive_entry_header_ustar *h;
|
|
int i, ret;
|
|
size_t copy_length;
|
|
const char *p, *pp;
|
|
const struct stat *st;
|
|
int mytartype;
|
|
|
|
ret = 0;
|
|
mytartype = -1;
|
|
/*
|
|
* The "template header" already includes the "ustar"
|
|
* signature, various end-of-field markers and other required
|
|
* elements.
|
|
*/
|
|
memcpy(buff, &template_header, 512);
|
|
|
|
h = (struct archive_entry_header_ustar *)buff;
|
|
|
|
/*
|
|
* Because the block is already null-filled, and strings
|
|
* are allowed to exactly fill their destination (without null),
|
|
* I use memcpy(dest, src, strlen()) here a lot to copy strings.
|
|
*/
|
|
|
|
pp = archive_entry_pathname(entry);
|
|
if (strlen(pp) <= sizeof(h->name))
|
|
memcpy(h->name, pp, strlen(pp));
|
|
else {
|
|
/* Store in two pieces, splitting at a '/'. */
|
|
p = strchr(pp + strlen(pp) - sizeof(h->name) - 1, '/');
|
|
/*
|
|
* If there is no path separator, or the prefix or
|
|
* remaining name are too large, return an error.
|
|
*/
|
|
if (!p) {
|
|
archive_set_error(a, ENAMETOOLONG,
|
|
"Pathname too long");
|
|
ret = ARCHIVE_WARN;
|
|
} else if (p > pp + sizeof(h->prefix)) {
|
|
archive_set_error(a, ENAMETOOLONG,
|
|
"Pathname too long");
|
|
ret = ARCHIVE_WARN;
|
|
} else {
|
|
/* Copy prefix and remainder to appropriate places */
|
|
memcpy(h->prefix, pp, p - pp);
|
|
memcpy(h->name, p + 1, pp + strlen(pp) - p - 1);
|
|
}
|
|
}
|
|
|
|
p = archive_entry_hardlink(entry);
|
|
if (p != NULL)
|
|
mytartype = '1';
|
|
else
|
|
p = archive_entry_symlink(entry);
|
|
if (p != NULL && p[0] != '\0') {
|
|
copy_length = strlen(p);
|
|
if (copy_length > sizeof(h->linkname)) {
|
|
archive_set_error(a, ENAMETOOLONG,
|
|
"Link contents too long");
|
|
ret = ARCHIVE_WARN;
|
|
copy_length = sizeof(h->linkname);
|
|
}
|
|
memcpy(h->linkname, p, copy_length);
|
|
}
|
|
|
|
p = archive_entry_uname(entry);
|
|
if (p != NULL && p[0] != '\0') {
|
|
copy_length = strlen(p);
|
|
if (copy_length > sizeof(h->uname)) {
|
|
archive_set_error(a, ARCHIVE_ERRNO_MISC,
|
|
"Username too long");
|
|
ret = ARCHIVE_WARN;
|
|
copy_length = sizeof(h->uname);
|
|
}
|
|
memcpy(h->uname, p, copy_length);
|
|
}
|
|
|
|
p = archive_entry_gname(entry);
|
|
if (p != NULL && p[0] != '\0') {
|
|
copy_length = strlen(p);
|
|
if (strlen(p) > sizeof(h->gname)) {
|
|
archive_set_error(a, ARCHIVE_ERRNO_MISC,
|
|
"Group name too long");
|
|
ret = ARCHIVE_WARN;
|
|
copy_length = sizeof(h->gname);
|
|
}
|
|
memcpy(h->gname, p, copy_length);
|
|
}
|
|
|
|
st = archive_entry_stat(entry);
|
|
|
|
if (format_number(st->st_mode & 07777, h->mode, sizeof(h->mode), 8, strict)) {
|
|
archive_set_error(a, ERANGE, "Numeric mode too large");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
|
|
if (format_number(st->st_uid, h->uid, sizeof(h->uid), 8, strict)) {
|
|
archive_set_error(a, ERANGE, "Numeric user ID too large");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
|
|
if (format_number(st->st_gid, h->gid, sizeof(h->gid), 8, strict)) {
|
|
archive_set_error(a, ERANGE, "Numeric group ID too large");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
|
|
if (format_number(st->st_size, h->size, sizeof(h->size), 12, strict)) {
|
|
archive_set_error(a, ERANGE, "File size out of range");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
|
|
if (format_number(st->st_mtime, h->mtime, sizeof(h->mtime), 12, strict)) {
|
|
archive_set_error(a, ERANGE,
|
|
"File modification time too large");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
|
|
if (S_ISBLK(st->st_mode) || S_ISCHR(st->st_mode)) {
|
|
if (format_number(major(st->st_rdev), h->rdevmajor,
|
|
sizeof(h->rdevmajor), 8, strict)) {
|
|
archive_set_error(a, ERANGE,
|
|
"Major device number too large");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
|
|
if (format_number(minor(st->st_rdev), h->rdevminor,
|
|
sizeof(h->rdevminor), 8, strict)) {
|
|
archive_set_error(a, ERANGE,
|
|
"Minor device number too large");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
|
|
if (tartype >= 0) {
|
|
h->typeflag[0] = tartype;
|
|
} else if (mytartype >= 0) {
|
|
h->typeflag[0] = mytartype;
|
|
} else {
|
|
switch (st->st_mode & S_IFMT) {
|
|
case S_IFREG: h->typeflag[0] = '0' ; break;
|
|
case S_IFLNK: h->typeflag[0] = '2' ; break;
|
|
case S_IFCHR: h->typeflag[0] = '3' ; break;
|
|
case S_IFBLK: h->typeflag[0] = '4' ; break;
|
|
case S_IFDIR: h->typeflag[0] = '5' ; break;
|
|
case S_IFIFO: h->typeflag[0] = '6' ; break;
|
|
case S_IFSOCK:
|
|
archive_set_error(a, ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"tar format cannot archive socket");
|
|
ret = ARCHIVE_WARN;
|
|
break;
|
|
default:
|
|
archive_set_error(a, ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"tar format cannot archive this (mode=0%lo)",
|
|
(unsigned long)st->st_mode);
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
|
|
checksum = 0;
|
|
for (i = 0; i < 512; i++)
|
|
checksum += 255 & (unsigned int)buff[i];
|
|
h->checksum[6] = '\0'; /* Can't be pre-set in the template. */
|
|
/* h->checksum[7] = ' '; */ /* This is pre-set in the template. */
|
|
format_octal(checksum, h->checksum, 6);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Format a number into a field, with some intelligence.
|
|
*/
|
|
static int
|
|
format_number(int64_t v, char *p, int s, int maxsize, int strict)
|
|
{
|
|
int64_t limit;
|
|
|
|
limit = ((int64_t)1 << (s*3));
|
|
|
|
/* "Strict" only permits octal values with proper termination. */
|
|
if (strict)
|
|
return (format_octal(v, p, s));
|
|
|
|
/*
|
|
* In non-strict mode, we allow the number to overwrite one or
|
|
* more bytes of the field termination. Even old tar
|
|
* implementations should be able to handle this with no
|
|
* problem.
|
|
*/
|
|
if (v >= 0) {
|
|
while (s <= maxsize) {
|
|
if (v < limit)
|
|
return (format_octal(v, p, s));
|
|
s++;
|
|
limit <<= 3;
|
|
}
|
|
}
|
|
|
|
/* Base-256 can handle any number, positive or negative. */
|
|
return (format_256(v, p, maxsize));
|
|
}
|
|
|
|
/*
|
|
* Format a number into the specified field using base-256.
|
|
*/
|
|
static int
|
|
format_256(int64_t v, char *p, int s)
|
|
{
|
|
p += s;
|
|
while (s-- > 0) {
|
|
*--p = (char)(v & 0xff);
|
|
v >>= 8;
|
|
}
|
|
*p |= 0x80; /* Set the base-256 marker bit. */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Format a number into the specified field.
|
|
*/
|
|
static int
|
|
format_octal(int64_t v, char *p, int s)
|
|
{
|
|
int len;
|
|
|
|
len = s;
|
|
|
|
/* Octal values can't be negative, so use 0. */
|
|
if (v < 0) {
|
|
while (len-- > 0)
|
|
*p++ = '0';
|
|
return (-1);
|
|
}
|
|
|
|
p += s; /* Start at the end and work backwards. */
|
|
while (s-- > 0) {
|
|
*--p = '0' + (v & 7);
|
|
v >>= 3;
|
|
}
|
|
|
|
if (v == 0)
|
|
return (0);
|
|
|
|
/* If it overflowed, fill field with max value. */
|
|
while (len-- > 0)
|
|
*p++ = '7';
|
|
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_finish(struct archive *a)
|
|
{
|
|
struct ustar *ustar;
|
|
int r;
|
|
|
|
r = ARCHIVE_OK;
|
|
ustar = (struct ustar *)a->format_data;
|
|
/*
|
|
* Suppress end-of-archive if nothing else was ever written.
|
|
* This fixes a problem where setting one format, then another
|
|
* ends up writing a gratuitous end-of-archive marker.
|
|
*/
|
|
if (ustar->written && a->compression_write != NULL)
|
|
r = write_nulls(a, 512*2);
|
|
free(ustar);
|
|
a->format_data = NULL;
|
|
return (r);
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_finish_entry(struct archive *a)
|
|
{
|
|
struct ustar *ustar;
|
|
int ret;
|
|
|
|
ustar = (struct ustar *)a->format_data;
|
|
ret = write_nulls(a,
|
|
ustar->entry_bytes_remaining + ustar->entry_padding);
|
|
ustar->entry_bytes_remaining = ustar->entry_padding = 0;
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
write_nulls(struct archive *a, size_t padding)
|
|
{
|
|
int ret, to_write;
|
|
|
|
while (padding > 0) {
|
|
to_write = padding < a->null_length ? padding : a->null_length;
|
|
ret = (a->compression_write)(a, a->nulls, to_write);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
padding -= to_write;
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_data(struct archive *a, const void *buff, size_t s)
|
|
{
|
|
struct ustar *ustar;
|
|
int ret;
|
|
|
|
ustar = (struct ustar *)a->format_data;
|
|
if (s > ustar->entry_bytes_remaining)
|
|
s = ustar->entry_bytes_remaining;
|
|
ret = (a->compression_write)(a, buff, s);
|
|
ustar->entry_bytes_remaining -= s;
|
|
return (ret);
|
|
}
|