From 8caabe19ec31e101a51c2ad7b493359d5d2f731c Mon Sep 17 00:00:00 2001
From: tjr <tjr@FreeBSD.org>
Date: Sun, 2 May 2004 02:54:37 +0000
Subject: Apply patch from gzip web page to correctly decompress files larger
 than 4GB on architectures with 64-bit long integers.

---
 gnu/usr.bin/gzip/unzip.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

(limited to 'gnu/usr.bin')

diff --git a/gnu/usr.bin/gzip/unzip.c b/gnu/usr.bin/gzip/unzip.c
index e36555a..f06994f 100644
--- a/gnu/usr.bin/gzip/unzip.c
+++ b/gnu/usr.bin/gzip/unzip.c
@@ -35,6 +35,7 @@ static char rcsid[] = "$FreeBSD$";
 #define LOCEXT 28               /* offset of extra field length */
 #define LOCHDR 30               /* size of local header, including sig */
 #define EXTHDR 16               /* size of extended local header, inc sig */
+#define RAND_HEAD_LEN  12       /* length of encryption random header */
 
 
 /* Globals */
@@ -103,6 +104,7 @@ int unzip(in, out)
     ulg orig_len = 0;       /* original uncompressed length */
     int n;
     uch buf[EXTHDR];        /* extended local header */
+    int err = OK;
 
     ifd = in;
     ofd = out;
@@ -136,9 +138,6 @@ int unzip(in, out)
 	}
 	while (n--) {
 	    uch c = (uch)get_byte();
-#ifdef CRYPT
-	    if (decrypt) zdecode(c);
-#endif
 	    put_ubyte(c);
 	}
 	flush_window();
@@ -172,10 +171,14 @@ int unzip(in, out)
 
     /* Validate decompression */
     if (orig_crc != updcrc(outbuf, 0)) {
-	error("invalid compressed data--crc error");
+	fprintf(stderr, "\n%s: %s: invalid compressed data--crc error\n",
+		progname, ifname);
+	err = ERROR;
     }
-    if (orig_len != (ulg)bytes_out) {
-	error("invalid compressed data--length error");
+    if (((orig_len - (ulg)bytes_out) & 0x0ffffffffL) != 0) {
+	fprintf(stderr, "\n%s: %s: invalid compressed data--length error\n",
+		progname, ifname);
+	err = ERROR;
     }
 
     /* Check if there are more entries in a pkzip file */
@@ -189,11 +192,12 @@ int unzip(in, out)
 	    fprintf(stderr,
 		    "%s: %s has more than one entry -- unchanged\n",
 		    progname, ifname);
-	    exit_code = ERROR;
-	    ext_header = pkzip = 0;
-	    return ERROR;
+	    err = ERROR;
 	}
     }
     ext_header = pkzip = 0; /* for next file */
-    return OK;
+    if (err == OK) return OK;
+    exit_code = ERROR;
+    if (!test) abort_gzip();
+    return err;
 }
-- 
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