[PATCH 1/3] index-helper: fix UNIX_PATH_MAX redefinition error on cygwin

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
---
 git-compat-util.h | 17 -----------------
 index-helper.c    |  4 ++--
 read-cache.c      |  2 +-
 3 files changed, 3 insertions(+), 20 deletions(-)

diff --git a/git-compat-util.h b/git-compat-util.h
index 0e35c13..c90c8c6 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -1043,21 +1043,4 @@ struct tm *git_gmtime_r(const time_t *, struct tm *);
 #define getc_unlocked(fh) getc(fh)
 #endif
 
-#ifdef __linux__
-#define UNIX_PATH_MAX 108
-#elif defined(__APPLE__) || defined(BSD)
-#define UNIX_PATH_MAX 104
-#else
-/*
- * Quoth POSIX: The size of sun_path has intentionally been left
- * undefined. This is because different implementations use different
- * sizes. For example, 4.3 BSD uses a size of 108, and 4.4 BSD uses a
- * size of 104. Since most implementations originate from BSD
- * versions, the size is typically in the range 92 to 108.
- *
- * Thanks, POSIX!  Super-helpful!  Hope we don't overflow any buffers!
- */
-#define UNIX_PATH_MAX 92
-#endif
-
 #endif
diff --git a/index-helper.c b/index-helper.c
index 4d08ff4..4a8e2ae 100644
--- a/index-helper.c
+++ b/index-helper.c
@@ -309,7 +309,7 @@ static int setup_socket(const char *socket_path)
 	int len;
 
 	len = strlen(socket_path);
-	if (len > UNIX_PATH_MAX - 1)
+	if (len > sizeof(address.sun_path) - 1)
 		die("path %s is too long for a socket", socket_path);
 
 	fd = socket(PF_UNIX, SOCK_STREAM, 0);
@@ -317,7 +317,7 @@ static int setup_socket(const char *socket_path)
 		return -1;
 
 	address.sun_family = AF_UNIX;
-	strncpy(address.sun_path, socket_path, UNIX_PATH_MAX);
+	strncpy(address.sun_path, socket_path, sizeof(address.sun_path));
 
 	if (bind(fd, (struct sockaddr *) &address, sizeof(address)))
 		die_errno(_("failed to bind to socket %s"), socket_path);
diff --git a/read-cache.c b/read-cache.c
index ab2fbaa..c7053d8 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1728,7 +1728,7 @@ int connect_to_index_helper(void)
 	int fd;
 
 	if (readlink(git_path("index-helper.path"), address.sun_path,
-		     UNIX_PATH_MAX) < 0)
+		     sizeof(address.sun_path)) < 0)
 		return -1;
 
 	fd = socket(PF_UNIX, SOCK_STREAM, 0);
-- 
2.8.0