[PATCH v2] Fix detection of uname failure

[Charles Bailey <charles@hashpling.org>]

From: Charles Bailey <cbailey32@bloomberg.net>

According to POSIX specification uname must return -1 on failure and a
non-negative value on success. Although many implementations do return 0
on success it is valid to return any positive value for success.  In
particular, Solaris returns 1.

Signed-off-by: Charles Bailey <cbailey32@bloomberg.net>
---
 dir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dir.c b/dir.c
index 8209f8b..1d42811 100644
--- a/dir.c
+++ b/dir.c
@@ -1848,7 +1848,7 @@ static const char *get_ident_string(void)
 
 	if (sb.len)
 		return sb.buf;
-	if (uname(&uts))
+	if (uname(&uts) < 0)
 		die_errno(_("failed to get kernel name and information"));
 	strbuf_addf(&sb, "Location %s, system %s %s %s", get_git_work_tree(),
 		    uts.sysname, uts.release, uts.version);
-- 
2.4.0.53.g8440f74