[Tarantool-patches] [PATCH v2 1/3] sql: add missing diag_set on failure when working with files inside SQL module

[Leonid Vasiliev <lvasiliev@tarantool.org>]

From: Mergen Imeev <imeevma@gmail.com>

SQL module didn't set an error in the diagnostics area on a file
operation failure. This could lead to a crash like in #5537.

Part of #5537
---
 src/box/sql/os_unix.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/box/sql/os_unix.c b/src/box/sql/os_unix.c
index b351c55..557d709 100644
--- a/src/box/sql/os_unix.c
+++ b/src/box/sql/os_unix.c
@@ -159,14 +159,17 @@ robust_open(const char *z, int f, mode_t m)
 		if (fd < 0) {
 			if (errno == EINTR)
 				continue;
+			diag_set(SystemError, strerror(errno));
 			break;
 		}
 		if (fd >= SQL_MINIMUM_FILE_DESCRIPTOR)
 			break;
 		close(fd);
 		fd = -1;
-		if (open("/dev/null", f, m) < 0)
+		if (open("/dev/null", f, m) < 0) {
+			diag_set(SystemError, strerror(errno));
 			break;
+		}
 	}
 	if (fd >= 0) {
 		if (m != 0) {
@@ -831,8 +834,10 @@ seekAndWriteFd(int fd,		/* File descriptor to write to */
 		rc = write(fd, pBuf, nBuf);
 	} while (rc < 0 && errno == EINTR);
 
-	if (rc < 0)
+	if (rc < 0) {
+		diag_set(SystemError, strerror(errno));
 		*piErrno = errno;
+	}
 	return rc;
 }
 
-- 
2.7.4