diff options
Diffstat (limited to 'usr.bin/unzip/unzip.c')
| -rw-r--r-- | usr.bin/unzip/unzip.c | 1078 |
1 files changed, 1078 insertions, 0 deletions
diff --git a/usr.bin/unzip/unzip.c b/usr.bin/unzip/unzip.c new file mode 100644 index 0000000..f3c6f97 --- /dev/null +++ b/usr.bin/unzip/unzip.c @@ -0,0 +1,1078 @@ +/*- + * 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 */ + +/* time when unzip started */ +static time_t now; + +/* 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; + 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 (!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 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 (!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_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 [-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++]; + + 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); +} |
