1046 lines
23 KiB
C
1046 lines
23 KiB
C
/*-
|
|
* Copyright (c) 2009 Joerg Sonnenberger <joerg@NetBSD.org>
|
|
* Copyright (c) 2007-2008 Dag-Erling Coïdan Smørgrav
|
|
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
* This file would be much shorter if we didn't care about command-line
|
|
* compatibility with Info-ZIP's UnZip, which requires us to duplicate
|
|
* parts of libarchive in order to gain more detailed control of its
|
|
* behaviour for the purpose of implementing the -n, -o, -L and -a
|
|
* options.
|
|
*/
|
|
|
|
#include <sys/queue.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <fnmatch.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <archive.h>
|
|
#include <archive_entry.h>
|
|
|
|
/* command-line options */
|
|
static int a_opt; /* convert EOL */
|
|
static int C_opt; /* match case-insensitively */
|
|
static int c_opt; /* extract to stdout */
|
|
static const char *d_arg; /* directory */
|
|
static int f_opt; /* update existing files only */
|
|
static int j_opt; /* junk directories */
|
|
static int L_opt; /* lowercase names */
|
|
static int n_opt; /* never overwrite */
|
|
static int o_opt; /* always overwrite */
|
|
static int p_opt; /* extract to stdout, quiet */
|
|
static int q_opt; /* quiet */
|
|
static int t_opt; /* test */
|
|
static int u_opt; /* update */
|
|
static int v_opt; /* verbose/list */
|
|
|
|
/* time when unzip started */
|
|
static time_t now;
|
|
|
|
/* debug flag */
|
|
static int unzip_debug;
|
|
|
|
/* running on tty? */
|
|
static int tty;
|
|
|
|
/* convenience macro */
|
|
/* XXX should differentiate between ARCHIVE_{WARN,FAIL,RETRY} */
|
|
#define ac(call) \
|
|
do { \
|
|
int acret = (call); \
|
|
if (acret != ARCHIVE_OK) \
|
|
errorx("%s", archive_error_string(a)); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Indicates that last info() did not end with EOL. This helps error() et
|
|
* al. avoid printing an error message on the same line as an incomplete
|
|
* informational message.
|
|
*/
|
|
static int noeol;
|
|
|
|
/* fatal error message + errno */
|
|
static void
|
|
error(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (noeol)
|
|
fprintf(stdout, "\n");
|
|
fflush(stdout);
|
|
fprintf(stderr, "unzip: ");
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, ": %s\n", strerror(errno));
|
|
exit(1);
|
|
}
|
|
|
|
/* fatal error message, no errno */
|
|
static void
|
|
errorx(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (noeol)
|
|
fprintf(stdout, "\n");
|
|
fflush(stdout);
|
|
fprintf(stderr, "unzip: ");
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, "\n");
|
|
exit(1);
|
|
}
|
|
|
|
#if 0
|
|
/* non-fatal error message + errno */
|
|
static void
|
|
warning(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (noeol)
|
|
fprintf(stdout, "\n");
|
|
fflush(stdout);
|
|
fprintf(stderr, "unzip: ");
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, ": %s\n", strerror(errno));
|
|
}
|
|
#endif
|
|
|
|
/* non-fatal error message, no errno */
|
|
static void
|
|
warningx(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (noeol)
|
|
fprintf(stdout, "\n");
|
|
fflush(stdout);
|
|
fprintf(stderr, "unzip: ");
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/* informational message (if not -q) */
|
|
static void
|
|
info(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (q_opt && !unzip_debug)
|
|
return;
|
|
va_start(ap, fmt);
|
|
vfprintf(stdout, fmt, ap);
|
|
va_end(ap);
|
|
fflush(stdout);
|
|
|
|
if (*fmt == '\0')
|
|
noeol = 1;
|
|
else
|
|
noeol = fmt[strlen(fmt) - 1] != '\n';
|
|
}
|
|
|
|
/* debug message (if unzip_debug) */
|
|
static void
|
|
debug(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (!unzip_debug)
|
|
return;
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fflush(stderr);
|
|
|
|
if (*fmt == '\0')
|
|
noeol = 1;
|
|
else
|
|
noeol = fmt[strlen(fmt) - 1] != '\n';
|
|
}
|
|
|
|
/* duplicate a path name, possibly converting to lower case */
|
|
static char *
|
|
pathdup(const char *path)
|
|
{
|
|
char *str;
|
|
size_t i, len;
|
|
|
|
len = strlen(path);
|
|
while (len && path[len - 1] == '/')
|
|
len--;
|
|
if ((str = malloc(len + 1)) == NULL) {
|
|
errno = ENOMEM;
|
|
error("malloc()");
|
|
}
|
|
if (L_opt) {
|
|
for (i = 0; i < len; ++i)
|
|
str[i] = tolower((unsigned char)path[i]);
|
|
} else {
|
|
memcpy(str, path, len);
|
|
}
|
|
str[len] = '\0';
|
|
|
|
return (str);
|
|
}
|
|
|
|
/* concatenate two path names */
|
|
static char *
|
|
pathcat(const char *prefix, const char *path)
|
|
{
|
|
char *str;
|
|
size_t prelen, len;
|
|
|
|
prelen = prefix ? strlen(prefix) + 1 : 0;
|
|
len = strlen(path) + 1;
|
|
if ((str = malloc(prelen + len)) == NULL) {
|
|
errno = ENOMEM;
|
|
error("malloc()");
|
|
}
|
|
if (prefix) {
|
|
memcpy(str, prefix, prelen); /* includes zero */
|
|
str[prelen - 1] = '/'; /* splat zero */
|
|
}
|
|
memcpy(str + prelen, path, len); /* includes zero */
|
|
|
|
return (str);
|
|
}
|
|
|
|
/*
|
|
* Pattern lists for include / exclude processing
|
|
*/
|
|
struct pattern {
|
|
STAILQ_ENTRY(pattern) link;
|
|
char pattern[];
|
|
};
|
|
|
|
STAILQ_HEAD(pattern_list, pattern);
|
|
static struct pattern_list include = STAILQ_HEAD_INITIALIZER(include);
|
|
static struct pattern_list exclude = STAILQ_HEAD_INITIALIZER(exclude);
|
|
|
|
/*
|
|
* Add an entry to a pattern list
|
|
*/
|
|
static void
|
|
add_pattern(struct pattern_list *list, const char *pattern)
|
|
{
|
|
struct pattern *entry;
|
|
size_t len;
|
|
|
|
debug("adding pattern '%s'\n", pattern);
|
|
len = strlen(pattern);
|
|
if ((entry = malloc(sizeof *entry + len + 1)) == NULL) {
|
|
errno = ENOMEM;
|
|
error("malloc()");
|
|
}
|
|
memcpy(entry->pattern, pattern, len + 1);
|
|
STAILQ_INSERT_TAIL(list, entry, link);
|
|
}
|
|
|
|
/*
|
|
* Match a string against a list of patterns
|
|
*/
|
|
static int
|
|
match_pattern(struct pattern_list *list, const char *str)
|
|
{
|
|
struct pattern *entry;
|
|
|
|
STAILQ_FOREACH(entry, list, link) {
|
|
if (fnmatch(entry->pattern, str, C_opt ? FNM_CASEFOLD : 0) == 0)
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Verify that a given pathname is in the include list and not in the
|
|
* exclude list.
|
|
*/
|
|
static int
|
|
accept_pathname(const char *pathname)
|
|
{
|
|
|
|
if (!STAILQ_EMPTY(&include) && !match_pattern(&include, pathname))
|
|
return (0);
|
|
if (!STAILQ_EMPTY(&exclude) && match_pattern(&exclude, pathname))
|
|
return (0);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Create the specified directory with the specified mode, taking certain
|
|
* precautions on they way.
|
|
*/
|
|
static void
|
|
make_dir(const char *path, int mode)
|
|
{
|
|
struct stat sb;
|
|
|
|
if (lstat(path, &sb) == 0) {
|
|
if (S_ISDIR(sb.st_mode))
|
|
return;
|
|
/*
|
|
* Normally, we should either ask the user about removing
|
|
* the non-directory of the same name as a directory we
|
|
* wish to create, or respect the -n or -o command-line
|
|
* options. However, this may lead to a later failure or
|
|
* even compromise (if this non-directory happens to be a
|
|
* symlink to somewhere unsafe), so we don't.
|
|
*/
|
|
|
|
/*
|
|
* Don't check unlink() result; failure will cause mkdir()
|
|
* to fail later, which we will catch.
|
|
*/
|
|
(void)unlink(path);
|
|
}
|
|
if (mkdir(path, mode) != 0 && errno != EEXIST)
|
|
error("mkdir('%s')", path);
|
|
}
|
|
|
|
/*
|
|
* Ensure that all directories leading up to (but not including) the
|
|
* specified path exist.
|
|
*
|
|
* XXX inefficient + modifies the file in-place
|
|
*/
|
|
static void
|
|
make_parent(char *path)
|
|
{
|
|
struct stat sb;
|
|
char *sep;
|
|
|
|
sep = strrchr(path, '/');
|
|
if (sep == NULL || sep == path)
|
|
return;
|
|
*sep = '\0';
|
|
if (lstat(path, &sb) == 0) {
|
|
if (S_ISDIR(sb.st_mode)) {
|
|
*sep = '/';
|
|
return;
|
|
}
|
|
unlink(path);
|
|
}
|
|
make_parent(path);
|
|
mkdir(path, 0755);
|
|
*sep = '/';
|
|
|
|
#if 0
|
|
for (sep = path; (sep = strchr(sep, '/')) != NULL; sep++) {
|
|
/* root in case of absolute d_arg */
|
|
if (sep == path)
|
|
continue;
|
|
*sep = '\0';
|
|
make_dir(path, 0755);
|
|
*sep = '/';
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Extract a directory.
|
|
*/
|
|
static void
|
|
extract_dir(struct archive *a, struct archive_entry *e, const char *path)
|
|
{
|
|
int mode;
|
|
|
|
mode = archive_entry_mode(e) & 0777;
|
|
if (mode == 0)
|
|
mode = 0755;
|
|
|
|
/*
|
|
* Some zipfiles contain directories with weird permissions such
|
|
* as 0644 or 0444. This can cause strange issues such as being
|
|
* unable to extract files into the directory we just created, or
|
|
* the user being unable to remove the directory later without
|
|
* first manually changing its permissions. Therefore, we whack
|
|
* the permissions into shape, assuming that the user wants full
|
|
* access and that anyone who gets read access also gets execute
|
|
* access.
|
|
*/
|
|
mode |= 0700;
|
|
if (mode & 0040)
|
|
mode |= 0010;
|
|
if (mode & 0004)
|
|
mode |= 0001;
|
|
|
|
info("d %s\n", path);
|
|
make_dir(path, mode);
|
|
ac(archive_read_data_skip(a));
|
|
}
|
|
|
|
static unsigned char buffer[8192];
|
|
static char spinner[] = { '|', '/', '-', '\\' };
|
|
|
|
static int
|
|
handle_existing_file(char **path)
|
|
{
|
|
size_t alen;
|
|
ssize_t len;
|
|
char buf[4];
|
|
|
|
for (;;) {
|
|
fprintf(stderr,
|
|
"replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ",
|
|
*path);
|
|
if (fgets(buf, sizeof(buf), stdin) == NULL) {
|
|
clearerr(stdin);
|
|
printf("NULL\n(EOF or read error, "
|
|
"treating as \"[N]one\"...)\n");
|
|
n_opt = 1;
|
|
return -1;
|
|
}
|
|
switch (*buf) {
|
|
case 'A':
|
|
o_opt = 1;
|
|
/* FALLTHROUGH */
|
|
case 'y':
|
|
case 'Y':
|
|
(void)unlink(*path);
|
|
return 1;
|
|
case 'N':
|
|
n_opt = 1;
|
|
/* FALLTHROUGH */
|
|
case 'n':
|
|
return -1;
|
|
case 'r':
|
|
case 'R':
|
|
printf("New name: ");
|
|
fflush(stdout);
|
|
free(*path);
|
|
*path = NULL;
|
|
alen = 0;
|
|
len = getdelim(path, &alen, '\n', stdin);
|
|
if ((*path)[len - 1] == '\n')
|
|
(*path)[len - 1] = '\0';
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Extract a regular file.
|
|
*/
|
|
static void
|
|
extract_file(struct archive *a, struct archive_entry *e, char **path)
|
|
{
|
|
int mode;
|
|
time_t mtime;
|
|
struct stat sb;
|
|
struct timeval tv[2];
|
|
int cr, fd, text, warn, check;
|
|
ssize_t len;
|
|
unsigned char *p, *q, *end;
|
|
|
|
mode = archive_entry_mode(e) & 0777;
|
|
if (mode == 0)
|
|
mode = 0644;
|
|
mtime = archive_entry_mtime(e);
|
|
|
|
/* look for existing file of same name */
|
|
recheck:
|
|
if (lstat(*path, &sb) == 0) {
|
|
if (u_opt || f_opt) {
|
|
/* check if up-to-date */
|
|
if (S_ISREG(sb.st_mode) && sb.st_mtime >= mtime)
|
|
return;
|
|
(void)unlink(*path);
|
|
} else if (o_opt) {
|
|
/* overwrite */
|
|
(void)unlink(*path);
|
|
} else if (n_opt) {
|
|
/* do not overwrite */
|
|
return;
|
|
} else {
|
|
check = handle_existing_file(path);
|
|
if (check == 0)
|
|
goto recheck;
|
|
if (check == -1)
|
|
return; /* do not overwrite */
|
|
}
|
|
} else {
|
|
if (f_opt)
|
|
return;
|
|
}
|
|
|
|
if ((fd = open(*path, O_RDWR|O_CREAT|O_TRUNC, mode)) < 0)
|
|
error("open('%s')", *path);
|
|
|
|
/* loop over file contents and write to disk */
|
|
info(" extracting: %s", *path);
|
|
text = a_opt;
|
|
warn = 0;
|
|
cr = 0;
|
|
for (int n = 0; ; n++) {
|
|
if (tty && (n % 4) == 0)
|
|
info(" %c\b\b", spinner[(n / 4) % sizeof spinner]);
|
|
|
|
len = archive_read_data(a, buffer, sizeof buffer);
|
|
|
|
if (len < 0)
|
|
ac(len);
|
|
|
|
/* left over CR from previous buffer */
|
|
if (a_opt && cr) {
|
|
if (len == 0 || buffer[0] != '\n')
|
|
if (write(fd, "\r", 1) != 1)
|
|
error("write('%s')", *path);
|
|
cr = 0;
|
|
}
|
|
|
|
/* EOF */
|
|
if (len == 0)
|
|
break;
|
|
end = buffer + len;
|
|
|
|
/*
|
|
* Detect whether this is a text file. The correct way to
|
|
* do this is to check the least significant bit of the
|
|
* "internal file attributes" field of the corresponding
|
|
* file header in the central directory, but libarchive
|
|
* does not read the central directory, so we have to
|
|
* guess by looking for non-ASCII characters in the
|
|
* buffer. Hopefully we won't guess wrong. If we do
|
|
* guess wrong, we print a warning message later.
|
|
*/
|
|
if (a_opt && n == 0) {
|
|
for (p = buffer; p < end; ++p) {
|
|
if (!isascii((unsigned char)*p)) {
|
|
text = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* simple case */
|
|
if (!a_opt || !text) {
|
|
if (write(fd, buffer, len) != len)
|
|
error("write('%s')", *path);
|
|
continue;
|
|
}
|
|
|
|
/* hard case: convert \r\n to \n (sigh...) */
|
|
for (p = buffer; p < end; p = q + 1) {
|
|
for (q = p; q < end; q++) {
|
|
if (!warn && !isascii(*q)) {
|
|
warningx("%s may be corrupted due"
|
|
" to weak text file detection"
|
|
" heuristic", *path);
|
|
warn = 1;
|
|
}
|
|
if (q[0] != '\r')
|
|
continue;
|
|
if (&q[1] == end) {
|
|
cr = 1;
|
|
break;
|
|
}
|
|
if (q[1] == '\n')
|
|
break;
|
|
}
|
|
if (write(fd, p, q - p) != q - p)
|
|
error("write('%s')", *path);
|
|
}
|
|
}
|
|
if (tty)
|
|
info(" \b\b");
|
|
if (text)
|
|
info(" (text)");
|
|
info("\n");
|
|
|
|
/* set access and modification time */
|
|
tv[0].tv_sec = now;
|
|
tv[0].tv_usec = 0;
|
|
tv[1].tv_sec = mtime;
|
|
tv[1].tv_usec = 0;
|
|
if (futimes(fd, tv) != 0)
|
|
error("utimes('%s')", *path);
|
|
if (close(fd) != 0)
|
|
error("close('%s')", *path);
|
|
}
|
|
|
|
/*
|
|
* Extract a zipfile entry: first perform some sanity checks to ensure
|
|
* that it is either a directory or a regular file and that the path is
|
|
* not absolute and does not try to break out of the current directory;
|
|
* then call either extract_dir() or extract_file() as appropriate.
|
|
*
|
|
* This is complicated a bit by the various ways in which we need to
|
|
* manipulate the path name. Case conversion (if requested by the -L
|
|
* option) happens first, but the include / exclude patterns are applied
|
|
* to the full converted path name, before the directory part of the path
|
|
* is removed in accordance with the -j option. Sanity checks are
|
|
* intentionally done earlier than they need to be, so the user will get a
|
|
* warning about insecure paths even for files or directories which
|
|
* wouldn't be extracted anyway.
|
|
*/
|
|
static void
|
|
extract(struct archive *a, struct archive_entry *e)
|
|
{
|
|
char *pathname, *realpathname;
|
|
mode_t filetype;
|
|
char *p, *q;
|
|
|
|
pathname = pathdup(archive_entry_pathname(e));
|
|
filetype = archive_entry_filetype(e);
|
|
|
|
/* sanity checks */
|
|
if (pathname[0] == '/' ||
|
|
strncmp(pathname, "../", 3) == 0 ||
|
|
strstr(pathname, "/../") != NULL) {
|
|
warningx("skipping insecure entry '%s'", pathname);
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
/* I don't think this can happen in a zipfile.. */
|
|
if (!S_ISDIR(filetype) && !S_ISREG(filetype)) {
|
|
warningx("skipping non-regular entry '%s'", pathname);
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
/* skip directories in -j case */
|
|
if (S_ISDIR(filetype) && j_opt) {
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
/* apply include / exclude patterns */
|
|
if (!accept_pathname(pathname)) {
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
/* apply -j and -d */
|
|
if (j_opt) {
|
|
for (p = q = pathname; *p; ++p)
|
|
if (*p == '/')
|
|
q = p + 1;
|
|
realpathname = pathcat(d_arg, q);
|
|
} else {
|
|
realpathname = pathcat(d_arg, pathname);
|
|
}
|
|
|
|
/* ensure that parent directory exists */
|
|
make_parent(realpathname);
|
|
|
|
if (S_ISDIR(filetype))
|
|
extract_dir(a, e, realpathname);
|
|
else
|
|
extract_file(a, e, &realpathname);
|
|
|
|
free(realpathname);
|
|
free(pathname);
|
|
}
|
|
|
|
static void
|
|
extract_stdout(struct archive *a, struct archive_entry *e)
|
|
{
|
|
char *pathname;
|
|
mode_t filetype;
|
|
int cr, text, warn;
|
|
ssize_t len;
|
|
unsigned char *p, *q, *end;
|
|
|
|
pathname = pathdup(archive_entry_pathname(e));
|
|
filetype = archive_entry_filetype(e);
|
|
|
|
/* I don't think this can happen in a zipfile.. */
|
|
if (!S_ISDIR(filetype) && !S_ISREG(filetype)) {
|
|
warningx("skipping non-regular entry '%s'", pathname);
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
/* skip directories in -j case */
|
|
if (S_ISDIR(filetype)) {
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
/* apply include / exclude patterns */
|
|
if (!accept_pathname(pathname)) {
|
|
ac(archive_read_data_skip(a));
|
|
free(pathname);
|
|
return;
|
|
}
|
|
|
|
if (c_opt)
|
|
info("x %s\n", pathname);
|
|
|
|
text = a_opt;
|
|
warn = 0;
|
|
cr = 0;
|
|
for (int n = 0; ; n++) {
|
|
len = archive_read_data(a, buffer, sizeof buffer);
|
|
|
|
if (len < 0)
|
|
ac(len);
|
|
|
|
/* left over CR from previous buffer */
|
|
if (a_opt && cr) {
|
|
if (len == 0 || buffer[0] != '\n') {
|
|
if (fwrite("\r", 1, 1, stderr) != 1)
|
|
error("write('%s')", pathname);
|
|
}
|
|
cr = 0;
|
|
}
|
|
|
|
/* EOF */
|
|
if (len == 0)
|
|
break;
|
|
end = buffer + len;
|
|
|
|
/*
|
|
* Detect whether this is a text file. The correct way to
|
|
* do this is to check the least significant bit of the
|
|
* "internal file attributes" field of the corresponding
|
|
* file header in the central directory, but libarchive
|
|
* does not read the central directory, so we have to
|
|
* guess by looking for non-ASCII characters in the
|
|
* buffer. Hopefully we won't guess wrong. If we do
|
|
* guess wrong, we print a warning message later.
|
|
*/
|
|
if (a_opt && n == 0) {
|
|
for (p = buffer; p < end; ++p) {
|
|
if (!isascii((unsigned char)*p)) {
|
|
text = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* simple case */
|
|
if (!a_opt || !text) {
|
|
if (fwrite(buffer, 1, len, stdout) != (size_t)len)
|
|
error("write('%s')", pathname);
|
|
continue;
|
|
}
|
|
|
|
/* hard case: convert \r\n to \n (sigh...) */
|
|
for (p = buffer; p < end; p = q + 1) {
|
|
for (q = p; q < end; q++) {
|
|
if (!warn && !isascii(*q)) {
|
|
warningx("%s may be corrupted due"
|
|
" to weak text file detection"
|
|
" heuristic", pathname);
|
|
warn = 1;
|
|
}
|
|
if (q[0] != '\r')
|
|
continue;
|
|
if (&q[1] == end) {
|
|
cr = 1;
|
|
break;
|
|
}
|
|
if (q[1] == '\n')
|
|
break;
|
|
}
|
|
if (fwrite(p, 1, q - p, stdout) != (size_t)(q - p))
|
|
error("write('%s')", pathname);
|
|
}
|
|
}
|
|
|
|
free(pathname);
|
|
}
|
|
|
|
/*
|
|
* Print the name of an entry to stdout.
|
|
*/
|
|
static void
|
|
list(struct archive *a, struct archive_entry *e)
|
|
{
|
|
char buf[20];
|
|
time_t mtime;
|
|
|
|
mtime = archive_entry_mtime(e);
|
|
strftime(buf, sizeof(buf), "%m-%d-%g %R", localtime(&mtime));
|
|
|
|
if (v_opt == 1) {
|
|
printf(" %8ju %s %s\n",
|
|
(uintmax_t)archive_entry_size(e),
|
|
buf, archive_entry_pathname(e));
|
|
} else if (v_opt == 2) {
|
|
printf("%8ju Stored %7ju 0%% %s %08x %s\n",
|
|
(uintmax_t)archive_entry_size(e),
|
|
(uintmax_t)archive_entry_size(e),
|
|
buf,
|
|
0U,
|
|
archive_entry_pathname(e));
|
|
}
|
|
ac(archive_read_data_skip(a));
|
|
}
|
|
|
|
/*
|
|
* Extract to memory to check CRC
|
|
*/
|
|
static int
|
|
test(struct archive *a, struct archive_entry *e)
|
|
{
|
|
ssize_t len;
|
|
int error_count;
|
|
|
|
error_count = 0;
|
|
if (S_ISDIR(archive_entry_filetype(e)))
|
|
return 0;
|
|
|
|
info(" testing: %s\t", archive_entry_pathname(e));
|
|
while ((len = archive_read_data(a, buffer, sizeof buffer)) > 0)
|
|
/* nothing */;
|
|
if (len < 0) {
|
|
info(" %s\n", archive_error_string(a));
|
|
++error_count;
|
|
} else {
|
|
info(" OK\n");
|
|
}
|
|
|
|
/* shouldn't be necessary, but it doesn't hurt */
|
|
ac(archive_read_data_skip(a));
|
|
|
|
return error_count;
|
|
}
|
|
|
|
|
|
/*
|
|
* Main loop: open the zipfile, iterate over its contents and decide what
|
|
* to do with each entry.
|
|
*/
|
|
static void
|
|
unzip(const char *fn)
|
|
{
|
|
struct archive *a;
|
|
struct archive_entry *e;
|
|
int fd, ret;
|
|
uintmax_t total_size, file_count, error_count;
|
|
|
|
if (strcmp(fn, "-") == 0)
|
|
fd = STDIN_FILENO;
|
|
else if ((fd = open(fn, O_RDONLY)) < 0)
|
|
error("%s", fn);
|
|
|
|
if ((a = archive_read_new()) == NULL)
|
|
error("archive_read_new failed");
|
|
|
|
ac(archive_read_support_format_zip(a));
|
|
ac(archive_read_open_fd(a, fd, 8192));
|
|
|
|
if (!p_opt && !q_opt)
|
|
printf("Archive: %s\n", fn);
|
|
if (v_opt == 1) {
|
|
printf(" Length Date Time Name\n");
|
|
printf(" -------- ---- ---- ----\n");
|
|
} else if (v_opt == 2) {
|
|
printf(" Length Method Size Ratio Date Time CRC-32 Name\n");
|
|
printf("-------- ------ ------- ----- ---- ---- ------ ----\n");
|
|
}
|
|
|
|
total_size = 0;
|
|
file_count = 0;
|
|
error_count = 0;
|
|
for (;;) {
|
|
ret = archive_read_next_header(a, &e);
|
|
if (ret == ARCHIVE_EOF)
|
|
break;
|
|
ac(ret);
|
|
if (t_opt)
|
|
error_count += test(a, e);
|
|
else if (v_opt)
|
|
list(a, e);
|
|
else if (p_opt || c_opt)
|
|
extract_stdout(a, e);
|
|
else
|
|
extract(a, e);
|
|
|
|
total_size += archive_entry_size(e);
|
|
++file_count;
|
|
}
|
|
|
|
if (v_opt == 1) {
|
|
printf(" -------- -------\n");
|
|
printf(" %8ju %ju file%s\n",
|
|
total_size, file_count, file_count != 1 ? "s" : "");
|
|
} else if (v_opt == 2) {
|
|
printf("-------- ------- --- -------\n");
|
|
printf("%8ju %7ju 0%% %ju file%s\n",
|
|
total_size, total_size, file_count,
|
|
file_count != 1 ? "s" : "");
|
|
}
|
|
|
|
ac(archive_read_close(a));
|
|
(void)archive_read_finish(a);
|
|
|
|
if (fd != STDIN_FILENO && close(fd) != 0)
|
|
error("%s", fn);
|
|
|
|
if (t_opt) {
|
|
if (error_count > 0) {
|
|
errorx("%d checksum error(s) found.", error_count);
|
|
}
|
|
else {
|
|
printf("No errors detected in compressed data of %s.\n",
|
|
fn);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "usage: unzip [-aCcfjLlnopqtuv] [-d dir] [-x pattern] zipfile\n");
|
|
exit(1);
|
|
}
|
|
|
|
static int
|
|
getopts(int argc, char *argv[])
|
|
{
|
|
int opt;
|
|
|
|
optreset = optind = 1;
|
|
while ((opt = getopt(argc, argv, "aCcd:fjLlnopqtuvx:")) != -1)
|
|
switch (opt) {
|
|
case 'a':
|
|
a_opt = 1;
|
|
break;
|
|
case 'C':
|
|
C_opt = 1;
|
|
break;
|
|
case 'c':
|
|
c_opt = 1;
|
|
break;
|
|
case 'd':
|
|
d_arg = optarg;
|
|
break;
|
|
case 'f':
|
|
f_opt = 1;
|
|
break;
|
|
case 'j':
|
|
j_opt = 1;
|
|
break;
|
|
case 'L':
|
|
L_opt = 1;
|
|
break;
|
|
case 'l':
|
|
if (v_opt == 0)
|
|
v_opt = 1;
|
|
break;
|
|
case 'n':
|
|
n_opt = 1;
|
|
break;
|
|
case 'o':
|
|
o_opt = 1;
|
|
q_opt = 1;
|
|
break;
|
|
case 'p':
|
|
p_opt = 1;
|
|
break;
|
|
case 'q':
|
|
q_opt = 1;
|
|
break;
|
|
case 't':
|
|
t_opt = 1;
|
|
break;
|
|
case 'u':
|
|
u_opt = 1;
|
|
break;
|
|
case 'v':
|
|
v_opt = 2;
|
|
break;
|
|
case 'x':
|
|
add_pattern(&exclude, optarg);
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
return (optind);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
const char *zipfile;
|
|
int nopts;
|
|
|
|
if (isatty(STDOUT_FILENO))
|
|
tty = 1;
|
|
|
|
if (getenv("UNZIP_DEBUG") != NULL)
|
|
unzip_debug = 1;
|
|
for (int i = 0; i < argc; ++i)
|
|
debug("%s%c", argv[i], (i < argc - 1) ? ' ' : '\n');
|
|
|
|
/*
|
|
* Info-ZIP's unzip(1) expects certain options to come before the
|
|
* zipfile name, and others to come after - though it does not
|
|
* enforce this. For simplicity, we accept *all* options both
|
|
* before and after the zipfile name.
|
|
*/
|
|
nopts = getopts(argc, argv);
|
|
|
|
if (argc <= nopts)
|
|
usage();
|
|
zipfile = argv[nopts++];
|
|
|
|
while (nopts < argc && *argv[nopts] != '-')
|
|
add_pattern(&include, argv[nopts++]);
|
|
|
|
nopts--; /* fake argv[0] */
|
|
nopts += getopts(argc - nopts, argv + nopts);
|
|
|
|
if (n_opt + o_opt + u_opt > 1)
|
|
errorx("-n, -o and -u are contradictory");
|
|
|
|
time(&now);
|
|
|
|
unzip(zipfile);
|
|
|
|
exit(0);
|
|
}
|