From 9e1fd8bcb8799216ae29450ae65b1a9d6a094544 Mon Sep 17 00:00:00 2001
From: mengfansheng <mengfansheng@uniontech.com>
Date: Mon, 3 Jun 2024 10:06:47 +0800
Subject: [PATCH] add fd_ispipe

---
 utshell-0.5/r_general/src/lib.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/utshell-0.5/r_general/src/lib.rs b/utshell-0.5/r_general/src/lib.rs
index 5873bfc5..ba8c7b63 100644
--- a/utshell-0.5/r_general/src/lib.rs
+++ b/utshell-0.5/r_general/src/lib.rs
@@ -987,4 +987,23 @@ pub unsafe extern "C" fn sh_unset_nodelay_mode(mut fd: libc::c_int) -> libc::c_i
     }
 
     return 0;
+}
+
+/* Just a wrapper for the define in include/filecntl.h */
+#[no_mangle]
+pub unsafe extern "C" fn sh_setclexec(mut fd: libc::c_int) -> libc::c_int {
+    return SET_CLOSE_ON_EXEC!(fd);
+}
+
+/* Return 1 if file descriptor FD is valid; 0 otherwise. */
+#[no_mangle]
+pub unsafe extern "C" fn sh_validfd(mut fd: libc::c_int) -> libc::c_int {
+    return (fcntl(fd, F_GETFD, 0) >= 0) as libc::c_int;
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn fd_ispipe(mut fd: libc::c_int) -> libc::c_int {
+    *__errno_location() = 0;
+    return (lseek(fd, 0 as libc::c_long, SEEK_CUR) < 0 as libc::c_int as libc::c_long
+        && *__errno_location() == ESPIPE) as libc::c_int;
 }
\ No newline at end of file
-- 
Gitee