github.com/afumu/libc@v0.0.6/musl/src/unistd/fchown.c (about)

     1  #include <unistd.h>
     2  #include <errno.h>
     3  #include <fcntl.h>
     4  #include "syscall.h"
     5  
     6  int fchown(int fd, uid_t uid, gid_t gid)
     7  {
     8  	int ret = __syscall(SYS_fchown, fd, uid, gid);
     9  	if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
    10  		return __syscall_ret(ret);
    11  
    12  	char buf[15+3*sizeof(int)];
    13  	__procfdname(buf, fd);
    14  #ifdef SYS_chown
    15  	return syscall(SYS_chown, buf, uid, gid);
    16  #else
    17  	return syscall(SYS_fchownat, AT_FDCWD, buf, uid, gid, 0);
    18  #endif
    19  
    20  }