From acf5ea72c70ddbdb90b18a2ae1169ad82e455876 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Mon, 6 Apr 2009 22:58:44 +0000
Subject: [PATCH] contrib/lar: 	- fix short read of index table 	-
 properly handle errno by using errno.h 	- extend lar_find_archive() to
 take a base search path a second argument 	- extend cli.c to allow
 specifing the base search path 	- print index number in lar.pl

---
 contrib/lar/cli.c  |  8 ++++----
 contrib/lar/lar.c  | 25 ++++++++++++++++++-------
 contrib/lar/lar.h  |  6 ++----
 contrib/lar/lar.pl |  4 ++--
 4 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/contrib/lar/cli.c b/contrib/lar/cli.c
index e8daf63a53..098f55d9d6 100644
--- a/contrib/lar/cli.c
+++ b/contrib/lar/cli.c
@@ -30,13 +30,13 @@ int do_print_index( lar_archive *ar )
 	return 0;
 }
 
-int do_require( const char *package )
+int do_require( const char *package, const char *path )
 {
 	int stat = 1;
 	lar_archive *ar;
 	lar_member *mb;
 
-	if( (ar = lar_find_archive(package)) != NULL )
+	if( (ar = lar_find_archive(package, path)) != NULL )
 	{
 		if( (mb = lar_find_member(ar, package)) != NULL )
 		{
@@ -78,7 +78,7 @@ int main( int argc, const char* argv[] )
 				break;
 
 			case 'r':
-				stat = do_require(argv[2]);
+				stat = do_require(argv[2], argv[3]);
 				break;
 		}
 
@@ -88,7 +88,7 @@ int main( int argc, const char* argv[] )
 	{
 		printf("Usage:\n");
 		printf("\tlar show <archive> [<member>]\n");
-		printf("\tlar require <package>\n");
+		printf("\tlar require <package> [<path>]\n");
 
 		return 1;
 	}
diff --git a/contrib/lar/lar.c b/contrib/lar/lar.c
index 839b29299b..6bac9d6b82 100644
--- a/contrib/lar/lar.c
+++ b/contrib/lar/lar.c
@@ -46,7 +46,7 @@ lar_index * lar_get_index( lar_archive *ar )
 	idx_map = NULL;
 
 	for( i = 0; i < idx_length; \
-		i += (sizeof(lar_index) - sizeof(char))
+		i += (sizeof(lar_index) - sizeof(char *))
 	) {
 		idx_ptr = (lar_index *)malloc(sizeof(lar_index));
 
@@ -174,16 +174,27 @@ int lar_close( lar_archive *ar )
 	return 0;
 }
 
-lar_archive * lar_find_archive( const char *package )
+lar_archive * lar_find_archive( const char *package, const char *path )
 {
 	int seg = 1;
-	int i, j, len;
+	int len = 0;
+	int pln = 0;
+	int i, j;
 	struct stat s;
 	LAR_FNAME(buffer);
 
+	if( path )
+	{
+		for( pln = 0; path[pln] != '\0'; pln++ )
+			if( pln >= (sizeof(buffer) - 5) )
+				LAR_DIE("Library path exceeds maximum allowed length");
+
+		memcpy(buffer, path, pln);
+	}
+
 	for( len = 0; package[len] != '\0'; len++ )
 	{
-		if( len >= (sizeof(buffer) - 5) )
+		if( len >= (sizeof(buffer) - 5 - pln) )
 			LAR_DIE("Package name exceeds maximum allowed length");
 
 		if( package[len] == '.' ) seg++;
@@ -197,11 +208,11 @@ lar_archive * lar_find_archive( const char *package )
 				if( j < seg ) j++; else break;
 			}
 
-			buffer[i] = ( package[i] == '.' ) ? LAR_DIRSEP : package[i];
+			buffer[pln+i] = ( package[i] == '.' ) ? LAR_DIRSEP : package[i];
 		}
 
-		buffer[i+0] = '.'; buffer[i+1] = 'l'; buffer[i+2] = 'a';
-		buffer[i+3] = 'r'; buffer[i+4] = '\0';
+		buffer[pln+i+0] = '.'; buffer[pln+i+1] = 'l'; buffer[pln+i+2] = 'a';
+		buffer[pln+i+3] = 'r'; buffer[pln+i+4] = '\0';
 
 		if( (stat(buffer, &s) > -1) && (s.st_mode & S_IFREG) )
 			return lar_open(buffer);
diff --git a/contrib/lar/lar.h b/contrib/lar/lar.h
index 59e6fa6209..04245ce632 100644
--- a/contrib/lar/lar.h
+++ b/contrib/lar/lar.h
@@ -7,14 +7,13 @@
 #include <stdint.h>
 #include <fcntl.h>
 #include <string.h>
+#include <errno.h>
 #include <arpa/inet.h>
 #include <sys/types.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 
 
-int errno;
-
 #define LAR_DIE(s) \
 	do { \
 		fprintf(stderr, "%s(%i): %s(): %s\n", \
@@ -82,9 +81,8 @@ lar_archive * lar_open( const char *filename );
 
 int lar_close( lar_archive *ar );
 
-lar_archive * lar_find_archive( const char *package );
+lar_archive * lar_find_archive( const char *package, const char *path );
 
 lar_member * lar_find_member( lar_archive *ar, const char *package );
 
 #endif
-
diff --git a/contrib/lar/lar.pl b/contrib/lar/lar.pl
index 56e4897958..2f9f3dd65f 100755
--- a/contrib/lar/lar.pl
+++ b/contrib/lar/lar.pl
@@ -38,10 +38,10 @@ foreach my $file ( @ARGV )
 	}
 }
 
-
+my $count = 1;
 foreach my $file ( @index )
 {
-	warn sprintf "Index: 0x%08X 0x%08X 0x%08X 0x%08X\n", $file->[0], $file->[1], $file->[2], $file->[3];
+	warn sprintf "Index[%4d]: 0x%08X 0x%08X 0x%08X 0x%08X\n", $count++, $file->[0], $file->[1], $file->[2], $file->[3];
 	print pack "NNNNnn", $file->[0], $file->[1], $file->[2], $file->[3], 0x0000, 0x0000;
 }
 
-- 
2.30.2