closefrom() in Solaris 11.4

gistfile1.txt

Oracle Corporation      SunOS 5.11      11.4    June 2019
solaris% cd /tmp
solaris% cat > closefrom.c
#include <stdlib.h>

int main() {
    closefrom(3);
}
solaris% cc -o closefrom closefrom.c
solaris% truss -u :: ./closefrom
[...]
/1@1:   -> libc:closefrom(0x3, 0x0)
/1@1:     -> libc:fcntl(0x3, 0x36, 0xfe2f9d4c, 0xfe1b573d)
/1@1:       -> libc:s_fcntl(0x3, 0x36, 0xfe2f9d4c, 0xfe289bce)
/1@1:         -> libc:syscall(0x3e, 0x3, 0x36, 0xfe2f9d4c)
fcntl(3, F_CLOSEFROM)                           = 0
/1@1:         <- libc:syscall() = 0
/1@1:       <- libc:s_fcntl() = 0
/1@1:     <- libc:fcntl() = 0
/1@1:   <- libc:closefrom() = 0