closefrom: add NetBSD, OpenBSD, DragonflyBSD

Author: tobhe

libc-test/semver/dragonfly.txt

@@ -1296,6 +1296,7 @@ clock_getcpuclockid
 clock_getres
 clock_nanosleep
 clock_settime
+closefrom
 cmsgcred
 cmsghdr
 cpuctl_cpuid_args_t

libc-test/semver/netbsd.txt

@@ -1252,6 +1252,7 @@ clearerr
 clock_getres
 clock_nanosleep
 clock_settime
+closefrom
 cmsghdr
 consttime_memequal
 daemon

libc-test/semver/openbsd.txt

@@ -1064,6 +1064,7 @@ chroot
 clearerr
 clock_getres
 clock_settime
+closefrom
 cmsghdr
 daemon
 devname

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -5546,7 +5546,6 @@ extern "C" {
         new_value: *const itimerspec,
         old_value: *mut itimerspec,
     ) -> c_int;
-    pub fn closefrom(lowfd: c_int);
     pub fn close_range(lowfd: c_uint, highfd: c_uint, flags: c_int) -> c_int;
 
     pub fn execvpe(

src/unix/bsd/freebsdlike/mod.rs

@@ -1792,6 +1792,8 @@ extern "C" {
         search_path: *const c_char,
         argv: *const *mut c_char,
     ) -> c_int;
+
+    pub fn closefrom(lowfd: c_int);
 }
 
 #[link(name = "rt")]

src/unix/bsd/netbsdlike/mod.rs

@@ -856,6 +856,8 @@ extern "C" {
         flags: c_int,
         timeout: *mut crate::timespec,
     ) -> c_int;
+
+    pub fn closefrom(lowfd: c_int);
 }
 
 cfg_if! {