Module Name: src
Committed By: simonb
Date: Sat Jun 10 04:45:25 UTC 2023
Modified Files:
src/usr.bin/gzip: gzip.c unlz.c unpack.c
Log Message:
Pull git commit way-etc-20140221.tar.bz2 by Xin Li from FreeBSD:
Remove unneeded checks for prelen.
In order to determine the type of a compressed file, we have to read
in the first four bytes which may also be important for decompression
purposes, to do that we would pass the buffer that we have already
read in, along with the size of it.
Rename header1 to fourbytes to make that explicit, and remove all
checks for prelen.
To generate a diff of this commit:
cvs rdiff -u -r1.118 -r1.119 src/usr.bin/gzip/gzip.c
cvs rdiff -u -r1.7 -r1.8 src/usr.bin/gzip/unlz.c
cvs rdiff -u -r1.3 -r1.4 src/usr.bin/gzip/unpack.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/usr.bin/gzip/gzip.c
diff -u src/usr.bin/gzip/gzip.c:1.118 src/usr.bin/gzip/gzip.c:1.119
--- src/usr.bin/gzip/gzip.c:1.118 Sat Jan 22 14:00:45 2022
+++ src/usr.bin/gzip/gzip.c Sat Jun 10 04:45:25 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: gzip.c,v 1.118 2022/01/22 14:00:45 christos Exp $ */
+/* $NetBSD: gzip.c,v 1.119 2023/06/10 04:45:25 simonb Exp $ */
/*
* Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008, 2009, 2010, 2011, 2015, 2017
@@ -31,7 +31,7 @@
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008,\
2009, 2010, 2011, 2015, 2017 Matthew R. Green. All rights reserved.");
-__RCSID("$NetBSD: gzip.c,v 1.118 2022/01/22 14:00:45 christos Exp $");
+__RCSID("$NetBSD: gzip.c,v 1.119 2023/06/10 04:45:25 simonb Exp $");
#endif /* not lint */
/*
@@ -1400,7 +1400,7 @@ file_uncompress(char *file, char *outfil
struct stat isb, osb;
off_t size;
ssize_t rbytes;
- unsigned char header1[4];
+ unsigned char fourbytes[4];
enum filetype method;
int fd, ofd, zfd = -1;
size_t in_size;
@@ -1434,8 +1434,8 @@ file_uncompress(char *file, char *outfil
goto lose;
}
- rbytes = read(fd, header1, sizeof header1);
- if (rbytes != sizeof header1) {
+ rbytes = read(fd, fourbytes, sizeof fourbytes);
+ if (rbytes != sizeof fourbytes) {
/* we don't want to fail here. */
#ifndef SMALL
if (fflag)
@@ -1449,7 +1449,7 @@ file_uncompress(char *file, char *outfil
}
infile_newdata(rbytes);
- method = file_gettype(header1);
+ method = file_gettype(fourbytes);
#ifndef SMALL
if (fflag == 0 && method == FT_UNKNOWN) {
maybe_warnx("%s: not in gzip format", file);
@@ -1473,7 +1473,7 @@ file_uncompress(char *file, char *outfil
infile_newdata(rv);
timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
- if (header1[3] & ORIG_NAME) {
+ if (fourbytes[3] & ORIG_NAME) {
rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
if (rbytes < 0) {
maybe_warn("can't read %s", file);
@@ -1787,7 +1787,7 @@ static void
handle_stdin(void)
{
struct stat isb;
- unsigned char header1[4];
+ unsigned char fourbytes[4];
size_t in_size;
off_t usize, gsize;
enum filetype method;
@@ -1818,16 +1818,16 @@ handle_stdin(void)
goto out;
}
- bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
+ bytes_read = read_retry(STDIN_FILENO, fourbytes, sizeof fourbytes);
if (bytes_read == -1) {
maybe_warn("can't read stdin");
goto out;
- } else if (bytes_read != sizeof(header1)) {
+ } else if (bytes_read != sizeof(fourbytes)) {
maybe_warnx("(stdin): unexpected end of file");
goto out;
}
- method = file_gettype(header1);
+ method = file_gettype(fourbytes);
switch (method) {
default:
#ifndef SMALL
@@ -1835,17 +1835,17 @@ handle_stdin(void)
maybe_warnx("unknown compression format");
goto out;
}
- usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
+ usize = cat_fd(fourbytes, sizeof fourbytes, &gsize, STDIN_FILENO);
break;
#endif
case FT_GZIP:
usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize, "(stdin)");
+ (char *)fourbytes, sizeof fourbytes, &gsize, "(stdin)");
break;
#ifndef NO_BZIP2_SUPPORT
case FT_BZIP2:
usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize);
+ (char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_COMPRESS_SUPPORT
@@ -1855,27 +1855,27 @@ handle_stdin(void)
goto out;
}
- usize = zuncompress(in, stdout, (char *)header1,
- sizeof header1, &gsize);
+ usize = zuncompress(in, stdout, (char *)fourbytes,
+ sizeof fourbytes, &gsize);
fclose(in);
break;
#endif
#ifndef NO_PACK_SUPPORT
case FT_PACK:
usize = unpack(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize);
+ (char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_XZ_SUPPORT
case FT_XZ:
usize = unxz(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize);
+ (char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_LZ_SUPPORT
case FT_LZ:
usize = unlz(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize);
+ (char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
}
Index: src/usr.bin/gzip/unlz.c
diff -u src/usr.bin/gzip/unlz.c:1.7 src/usr.bin/gzip/unlz.c:1.8
--- src/usr.bin/gzip/unlz.c:1.7 Fri Sep 10 21:52:17 2021
+++ src/usr.bin/gzip/unlz.c Sat Jun 10 04:45:25 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: unlz.c,v 1.7 2021/09/10 21:52:17 rillig Exp $ */
+/* $NetBSD: unlz.c,v 1.8 2023/06/10 04:45:25 simonb Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -616,8 +616,6 @@ unlz(int fin, int fout, char *pre, size_
char header[HDR_SIZE];
- if (prelen > sizeof(header))
- return -1;
if (pre && prelen)
memcpy(header, pre, prelen);
Index: src/usr.bin/gzip/unpack.c
diff -u src/usr.bin/gzip/unpack.c:1.3 src/usr.bin/gzip/unpack.c:1.4
--- src/usr.bin/gzip/unpack.c:1.3 Fri Aug 4 07:27:08 2017
+++ src/usr.bin/gzip/unpack.c Sat Jun 10 04:45:25 2023
@@ -1,5 +1,5 @@
/* $FreeBSD: head/usr.bin/gzip/unpack.c 194579 2009-06-21 09:39:43Z delphij $ */
-/* $NetBSD: unpack.c,v 1.3 2017/08/04 07:27:08 mrg Exp $ */
+/* $NetBSD: unpack.c,v 1.4 2023/06/10 04:45:25 simonb Exp $ */
/*-
* Copyright (c) 2009 Xin LI <[email protected]>
@@ -153,9 +153,6 @@ unpack_parse_header(int in, int out, cha
ssize_t bytesread; /* Bytes read from the file */
int i, j, thisbyte;
- if (prelen > sizeof hdr)
- maybe_err("prelen too long");
-
/* Prepend the header buffer if we already read some data */
if (prelen != 0)
memcpy(hdr, pre, prelen);
