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refactor(fileio): use os_copy() to copy file (#30030)

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It uses sendfile(), which is faster than combining read() and write(),
and it also copies permissions.
This commit is contained in:
zeertzjq 2024-08-13 07:09:55 +08:00 committed by GitHub
parent 88f07d6ca4
commit 9768e88f38
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1 changed files with 2 additions and 41 deletions
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43
src/nvim/fileio.c
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@ -2733,53 +2733,14 @@ int vim_copyfile(const char *from, const char *to)
}
#endif
int perm = os_getperm(from);
// For systems that support ACL: get the ACL from the original file.
vim_acl_T acl = os_get_acl(from);
int fd_in = os_open(from, O_RDONLY, 0);
if (fd_in < 0) {
if (os_copy(from, to, UV_FS_COPYFILE_EXCL) != 0) {
os_free_acl(acl);
return FAIL;
}
// Create the new file with same permissions as the original.
int fd_out = os_open(to, O_CREAT|O_EXCL|O_WRONLY|O_NOFOLLOW, perm);
if (fd_out < 0) {
close(fd_in);
os_free_acl(acl);
return FAIL;
}
// Avoid xmalloc() here as vim_rename() is called by buf_write() when nvim
// is `preserve_exit()`ing.
char *buffer = try_malloc(WRITEBUFSIZE);
if (buffer == NULL) {
close(fd_out);
close(fd_in);
os_free_acl(acl);
return FAIL;
}
int n;
while ((n = read_eintr(fd_in, buffer, WRITEBUFSIZE)) > 0) {
if (write_eintr(fd_out, buffer, (size_t)n) != n) {
errmsg = _("E208: Error writing to \"%s\"");
break;
}
}
xfree(buffer);
close(fd_in);
if (close(fd_out) < 0) {
errmsg = _("E209: Error closing \"%s\"");
}
if (n < 0) {
errmsg = _("E210: Error reading \"%s\"");
to = from;
}
#ifndef UNIX // For Unix os_open() already set the permission.
os_setperm(to, perm);
#endif
os_set_acl(to, acl);
os_free_acl(acl);
if (errmsg != NULL) {