X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=sha1_file.c;h=28ad1598e54200ca8ee1261ed7beb4e31e20b2f1;hb=c6e007b0942a373bbf87fa3e4e11e2d90907de8c;hp=7b7b65d2eb3757ceb83f35a60be07e8d705dc0fb;hpb=f4913f91a960ebcfbc9c6a09dc909ce638cb5c66;p=git.git

diff --git a/sha1_file.c b/sha1_file.c
index 7b7b65d2..28ad1598 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -11,6 +11,16 @@
 
 const char *sha1_file_directory = NULL;
 
+#ifndef O_NOATIME
+#if defined(__linux__) && (defined(__i386__) || defined(__PPC__))
+#define O_NOATIME 01000000
+#else
+#define O_NOATIME 0
+#endif
+#endif
+
+static unsigned int sha1_file_open_flag = O_NOATIME;
+
 static unsigned hexval(char c)
 {
 	if (c >= '0' && c <= '9')
@@ -96,13 +106,26 @@ int check_sha1_signature(unsigned char *sha1, void *map, unsigned long size, con
 void *map_sha1_file(const unsigned char *sha1, unsigned long *size)
 {
 	char *filename = sha1_file_name(sha1);
-	int fd = open(filename, O_RDONLY);
 	struct stat st;
 	void *map;
+	int fd;
 
+	fd = open(filename, O_RDONLY | sha1_file_open_flag);
 	if (fd < 0) {
-		perror(filename);
-		return NULL;
+		/* See if it works without O_NOATIME */
+		switch (sha1_file_open_flag) {
+		default:
+			fd = open(filename, O_RDONLY);
+			if (fd >= 0)
+				break;
+		/* Fallthrough */
+		case 0:
+			perror(filename);
+			return NULL;
+		}
+
+		/* If it failed once, it will probably fail again. Stop using O_NOATIME */
+		sha1_file_open_flag = 0;
 	}
 	if (fstat(fd, &st) < 0) {
 		close(fd);
@@ -132,6 +155,8 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
 
 	inflateInit(&stream);
 	ret = inflate(&stream, 0);
+       if (ret < Z_OK)
+               return NULL;
 	if (sscanf(buffer, "%10s %lu", type, size) != 2)
 		return NULL;
 
@@ -174,7 +199,7 @@ void *read_tree_with_tree_or_commit_sha1(const unsigned char *sha1,
 	void *buffer;
 	unsigned long isize;
 	int was_commit = 0;
-	char tree_sha1[20];
+	unsigned char tree_sha1[20];
 
 	buffer = read_sha1_file(sha1, type, &isize);
 
@@ -197,7 +222,7 @@ void *read_tree_with_tree_or_commit_sha1(const unsigned char *sha1,
 	 */
 	if (!buffer || strcmp(type, "tree")) {
 		free(buffer);
-		return;
+		return NULL;
 	}
 
 	*size = isize;
@@ -305,3 +330,75 @@ int write_sha1_buffer(const unsigned char *sha1, void *buf, unsigned int size)
 	close(fd);
 	return 0;
 }
+
+int write_sha1_from_fd(const unsigned char *sha1, int fd)
+{
+	char *filename = sha1_file_name(sha1);
+
+	int local;
+	z_stream stream;
+	unsigned char real_sha1[20];
+	char buf[4096];
+	char discard[4096];
+	int ret;
+	SHA_CTX c;
+
+	local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
+
+	if (local < 0)
+		return error("Couldn't open %s\n", filename);
+
+	memset(&stream, 0, sizeof(stream));
+
+	inflateInit(&stream);
+
+	SHA1_Init(&c);
+
+	do {
+		ssize_t size;
+		size = read(fd, buf, 4096);
+		if (size <= 0) {
+			close(local);
+			unlink(filename);
+			if (!size)
+				return error("Connection closed?");
+			perror("Reading from connection");
+			return -1;
+		}
+		write(local, buf, size);
+		stream.avail_in = size;
+		stream.next_in = buf;
+		do {
+			stream.next_out = discard;
+			stream.avail_out = sizeof(discard);
+			ret = inflate(&stream, Z_SYNC_FLUSH);
+			SHA1_Update(&c, discard, sizeof(discard) -
+				    stream.avail_out);
+		} while (stream.avail_in && ret == Z_OK);
+		
+	} while (ret == Z_OK);
+	inflateEnd(&stream);
+
+	close(local);
+	SHA1_Final(real_sha1, &c);
+	if (ret != Z_STREAM_END) {
+		unlink(filename);
+		return error("File %s corrupted", sha1_to_hex(sha1));
+	}
+	if (memcmp(sha1, real_sha1, 20)) {
+		unlink(filename);
+		return error("File %s has bad hash\n", sha1_to_hex(sha1));
+	}
+	
+	return 0;
+}
+
+int has_sha1_file(const unsigned char *sha1)
+{
+	char *filename = sha1_file_name(sha1);
+	struct stat st;
+
+	if (!stat(filename, &st))
+		return 1;
+	return 0;
+}