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authorRobert Griebl2002-05-15 22:13:47 +0000
committerRobert Griebl2002-05-15 22:13:47 +0000
commitf6495eb7670063c0e9040c3eb3a0f1087d762a6a (patch)
treea53533813c8dc4c953532a679fc34d6903e0c3a0 /archival/libunarchive/decompress_unzip.c
parent7ac868460a90e1de4a2f45229f22f1cd07370c05 (diff)
downloadbusybox-f6495eb7670063c0e9040c3eb3a0f1087d762a6a.zip
busybox-f6495eb7670063c0e9040c3eb3a0f1087d762a6a.tar.gz
Support old-style compress (.Z) files via libbb / unzip( ) calls
(configurable) - When enabled an applet "uncompress" is also made available (oddname to gunzip)
Diffstat (limited to 'archival/libunarchive/decompress_unzip.c')
-rw-r--r--archival/libunarchive/decompress_unzip.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/archival/libunarchive/decompress_unzip.c b/archival/libunarchive/decompress_unzip.c
index 9f6ed2e..cde16d0 100644
--- a/archival/libunarchive/decompress_unzip.c
+++ b/archival/libunarchive/decompress_unzip.c
@@ -65,8 +65,13 @@ static char *license_msg[] = {
#include <signal.h>
#include <stdlib.h>
#include <string.h>
+#include "config.h"
#include "libbb.h"
+#ifdef CONFIG_FEATURE_UNCOMPRESS
+int uncompress ( FILE *in, FILE *out );
+#endif
+
static FILE *in_file, *out_file;
/* these are freed by gz_close */
@@ -911,6 +916,7 @@ extern int unzip(FILE *l_in_file, FILE *l_out_file)
unsigned char flags; /* compression flags */
typedef void (*sig_type) (int);
unsigned short i;
+ unsigned char magic [2];
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
(void) signal(SIGINT, (sig_type) abort_gzip);
@@ -926,8 +932,18 @@ extern int unzip(FILE *l_in_file, FILE *l_out_file)
}
#endif
+ magic [0] = fgetc(l_in_file);
+ magic [1] = fgetc(l_in_file);
+
+#ifdef CONFIG_FEATURE_UNCOMPRESS
+ /* Magic header for compress files, 1F 9d = \037\235 */
+ if (( magic [0] == 0x1F ) && ( magic [1] == 0x9d)) {
+ return uncompress ( l_in_file, l_out_file );
+ }
+#endif
+
/* Magic header for gzip files, 1F 8B = \037\213 */
- if ((fgetc(l_in_file) != 0x1F) || (fgetc(l_in_file) != 0x8b)) {
+ if (( magic [0] != 0x1F ) || ( magic [1] != 0x8b)) {
error_msg("Invalid gzip magic");
return EXIT_FAILURE;
}