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Diffstat (limited to 'src/fcntl/fcntl.c')
-rw-r--r--src/fcntl/fcntl.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/fcntl/fcntl.c b/src/fcntl/fcntl.c
index fb7806a3..390ef758 100644
--- a/src/fcntl/fcntl.c
+++ b/src/fcntl/fcntl.c
@@ -22,5 +22,21 @@ int fcntl(int fd, int cmd, ...)
if (ret) return __syscall_ret(ret);
return ex.type == F_OWNER_PGRP ? -ex.pid : ex.pid;
}
+ if (cmd == F_DUPFD_CLOEXEC) {
+ int ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, arg);
+ if (ret != -EINVAL) {
+ if (ret >= 0)
+ __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+ return __syscall_ret(ret);
+ }
+ ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, 0);
+ if (ret != -EINVAL) {
+ if (ret >= 0) __syscall(SYS_close, ret);
+ return __syscall_ret(-EINVAL);
+ }
+ ret = __syscall(SYS_fcntl, fd, F_DUPFD, arg);
+ if (ret >= 0) __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+ return __syscall_ret(ret);
+ }
return syscall(SYS_fcntl, fd, cmd, arg);
}