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-rw-r--r--usr.bin/unzip/unzip.c237
1 files changed, 94 insertions, 143 deletions
diff --git a/usr.bin/unzip/unzip.c b/usr.bin/unzip/unzip.c
index cb639fb..fb123db 100644
--- a/usr.bin/unzip/unzip.c
+++ b/usr.bin/unzip/unzip.c
@@ -403,7 +403,7 @@ extract_dir(struct archive *a, struct archive_entry *e, const char *path)
if (mode & 0004)
mode |= 0001;
- info("d %s\n", path);
+ info(" creating: %s/\n", path);
make_dir(path, mode);
ac(archive_read_data_skip(a));
}
@@ -466,7 +466,9 @@ handle_existing_file(char **path)
* one white-listed byte has to be found.
*
* Black-listed: 0..6, 14..25, 28..31
+ * 0xf3ffc07f = 11110011111111111100000001111111b
* White-listed: 9..10, 13, >= 32
+ * 0x00002600 = 00000000000000000010011000000000b
*
* See the proginfo/txtvsbin.txt in the zip sources for a detailed discussion.
*/
@@ -488,6 +490,92 @@ check_binary(const unsigned char *buf, size_t len)
}
/*
+ * Extract to a file descriptor
+ */
+static int
+extract2fd(struct archive *a, char *pathname, int fd)
+{
+ int cr, text, warn;
+ ssize_t len;
+ unsigned char *p, *q, *end;
+
+ text = a_opt;
+ warn = 0;
+ cr = 0;
+
+ /* loop over file contents and write to fd */
+ for (int n = 0; ; n++) {
+ if (fd != STDOUT_FILENO)
+ 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')", 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 provide access to this field, 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) {
+ if (check_binary(buffer, len))
+ text = 0;
+ }
+
+ /* simple case */
+ if (!a_opt || !text) {
+ if (write(fd, buffer, len) != 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 && BYTE_IS_BINARY(*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 (write(fd, p, q - p) != q - p)
+ error("write('%s')", pathname);
+ }
+ }
+
+ return text;
+}
+
+/*
* Extract a regular file.
*/
static void
@@ -497,10 +585,8 @@ extract_file(struct archive *a, struct archive_entry *e, char **path)
struct timespec mtime;
struct stat sb;
struct timespec ts[2];
- int cr, fd, text, warn, check;
- ssize_t len;
+ int fd, check, text;
const char *linkname;
- unsigned char *p, *q, *end;
mode = archive_entry_mode(e) & 0777;
if (mode == 0)
@@ -558,77 +644,10 @@ recheck:
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);
+ text = extract2fd(a, *path, fd);
- 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) {
- if (check_binary(buffer, len))
- text = 0;
- }
-
- /* 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 && BYTE_IS_BINARY(*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)
@@ -726,9 +745,6 @@ 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);
@@ -758,73 +774,7 @@ extract_stdout(struct archive *a, struct archive_entry *e)
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) {
- if (check_binary(buffer, len))
- text = 0;
- }
-
- /* 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 && BYTE_IS_BINARY(*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);
- }
- }
+ (void)extract2fd(a, pathname, STDOUT_FILENO);
free(pathname);
}
@@ -982,7 +932,8 @@ static void
usage(void)
{
- fprintf(stderr, "Usage: unzip [-aCcfjLlnopqtuvyZ1] [-d dir] [-x pattern] zipfile\n");
+ fprintf(stderr, "Usage: unzip [-aCcfjLlnopqtuvyZ1] [-d dir] [-x pattern] "
+ "zipfile\n");
exit(1);
}
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