[Minios-devel] [UNIKRAFT PATCH 2/3] lib/vfscore: Add pipe2() implementation and mkfifo() stub

[Costin Lupu <costin.lupu@xxxxxxxxx>]

For pipe2() we have just adapted musl's version. It basically calls pipe()
and apply the flags by calling fcntl() internally. mkfifo() is just a stub.

Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
---
 lib/vfscore/exportsyms.uk |  2 ++
 lib/vfscore/pipe.c        | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/lib/vfscore/exportsyms.uk b/lib/vfscore/exportsyms.uk
index b2957cc6..225cd730 100644
--- a/lib/vfscore/exportsyms.uk
+++ b/lib/vfscore/exportsyms.uk
@@ -110,6 +110,8 @@ vn_stat
 vn_unlock
 vfs_busy
 pipe
+pipe2
+mkfifo
 futimes
 futimesat
 utimensat
diff --git a/lib/vfscore/pipe.c b/lib/vfscore/pipe.c
index 4c561304..8d382965 100644
--- a/lib/vfscore/pipe.c
+++ b/lib/vfscore/pipe.c
@@ -571,3 +571,31 @@ ERR_EXIT:
        UK_ASSERT(ret < 0);
        return ret;
 }
+
+/* TODO find a more efficient way to implement pipe2() */
+int pipe2(int pipefd[2], int flags)
+{
+       int rc;
+
+       rc = pipe(pipefd);
+       if (rc)
+               return rc;
+
+       if (flags & O_CLOEXEC) {
+               fcntl(pipefd[0], F_SETFD, FD_CLOEXEC);
+               fcntl(pipefd[1], F_SETFD, FD_CLOEXEC);
+       }
+       if (flags & O_NONBLOCK) {
+               fcntl(pipefd[0], F_SETFL, O_NONBLOCK);
+               fcntl(pipefd[1], F_SETFL, O_NONBLOCK);
+       }
+       return 0;
+}
+
+/* TODO maybe find a better place for this when it will be implemented */
+int mkfifo(const char *path __unused, mode_t mode __unused)
+{
+       WARN_STUBBED();
+       errno = ENOTSUP;
+       return -1;
+}
-- 
2.20.1


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