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freebsd/usr.bin/unzip/unzip.c
Jilles Tjoelker 7a970ca937 unzip: Don't subvert vfs.timestamp_precision when setting atime to now. 
Also, preserve nanoseconds from libarchive, even though the zip file format
does not currently support nanoseconds in timestamps.
2015-03-15 21:29:20 +00:00

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/*-
* Copyright (c) 2009 Joerg Sonnenberger <joerg@NetBSD.org>
* Copyright (c) 2007-2008 Dag-Erling 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 */
static int Z1_opt; /* zipinfo mode list files only */
/* debug flag */
static int unzip_debug;
/* zipinfo mode */
static int zipinfo_mode;
/* 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;
struct timespec mtime;
struct stat sb;
struct timespec ts[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.tv_sec = archive_entry_mtime(e);
mtime.tv_nsec = archive_entry_mtime_nsec(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_mtim.tv_sec > mtime.tv_sec ||
(sb.st_mtim.tv_sec == mtime.tv_sec &&
sb.st_mtim.tv_nsec >= mtime.tv_nsec)))
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 */
ts[0].tv_sec = 0;
ts[0].tv_nsec = UTIME_NOW;
ts[1] = mtime;
if (futimens(fd, ts) != 0)
error("futimens('%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 (!zipinfo_mode) {
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));
}
} else {
if (Z1_opt)
printf("%s\n",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 ret;
uintmax_t total_size, file_count, error_count;
if ((a = archive_read_new()) == NULL)
error("archive_read_new failed");
ac(archive_read_support_format_zip(a));
ac(archive_read_open_filename(a, fn, 8192));
if (!zipinfo_mode) {
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 (!zipinfo_mode) {
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);
} else {
if (Z1_opt)
list(a, e);
}
total_size += archive_entry_size(e);
++file_count;
}
if (zipinfo_mode) {
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_free(a);
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 [-aCcfjLlnopqtuvZ1] [-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:Z1")) != -1)
switch (opt) {
case '1':
Z1_opt = 1;
break;
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;
case 'Z':
zipinfo_mode = 1;
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);
/*
* When more of the zipinfo mode options are implemented, this
* will need to change.
*/
if (zipinfo_mode && !Z1_opt) {
printf("Zipinfo mode needs additional options\n");
exit(1);
}
if (argc <= nopts)
usage();
zipfile = argv[nopts++];
if (strcmp(zipfile, "-") == 0)
zipfile = NULL; /* STDIN */
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");
unzip(zipfile);
exit(0);
}
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