src/usr.bin/mg/fileio.c - diff

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version 1.5, 2000/02/27 05:49:14

version 1.6, 2000/02/27 06:02:35

Line 327

#include <sys/wait.h>

#include "kbd.h"

* It's sort of gross to call system commands in a subfork. However

* that's by far the easiest way. These things are used only in

* dired, so they are not performance-critical. The cp program is

* almost certainly faster at copying files than any stupid code that

* we would write. In fact there is no other way to do unlinkdir.

* You don't want to do a simple unlink. To do the whole thing in

* a general way requires root, and rmdir is setuid. We don't really

* want microemacs to have to run setuid. rename is easy to do with

* unlink, link, unlink. However that code will fail if the destination

* is on a different file system. mv will copy in that case. It seems

* easier to let mv worry about this stuff.

copy(frname, toname)

char *frname, *toname;

{

int pid;

pid_t pid;

int status;

if(pid = fork()) {

if(pid = vfork()) {

if(pid == -1) return -1;

execl("/bin/cp", "cp", frname, toname, (char *)NULL);

_exit(1); /* shouldn't happen */