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fileinfo: implement os_fileinfo_hardlinks

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This commit is contained in:
Stefan Hoffmann 2014-08-08 16:53:03 +02:00
parent aa378acdf5
commit e85fe0957d
3 changed files with 26 additions and 3 deletions
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6
src/nvim/fileio.c
View File

@ -2712,7 +2712,7 @@ buf_write (
* - it's a symbolic link
* - we don't have write permission in the directory
*/
if (file_info_old.stat.st_nlink > 1
if (os_fileinfo_hardlinks(&file_info_old) > 1
|| !os_get_file_info_link((char *)fname, &file_info)
|| !os_file_info_id_equal(&file_info, &file_info_old)) {
backup_copy = TRUE;
@ -2770,7 +2770,7 @@ buf_write (
/* Hardlinks. */
if ((bkc_flags & BKC_BREAKHARDLINK)
&& file_info_old.stat.st_nlink > 1
&& os_fileinfo_hardlinks(&file_info_old) > 1
&& (!file_info_link_ok
|| os_file_info_id_equal(&file_info, &file_info_old))) {
backup_copy = FALSE;
@ -3201,7 +3201,7 @@ nobackup:
FileInfo file_info;
/* Don't delete the file when it's a hard or symbolic link. */
if ((!newfile && file_info_old.stat.st_nlink > 1)
if ((!newfile && os_fileinfo_hardlinks(&file_info) > 1)
|| (os_get_file_info_link((char *)fname, &file_info)
&& !os_file_info_id_equal(&file_info, &file_info_old))) {
errmsg = (char_u *)_("E166: Can't open linked file for writing");

9
src/nvim/os/fs.c
View File

@ -403,6 +403,15 @@ off_t os_fileinfo_size(const FileInfo *file_info)
return file_info->stat.st_size;
}
/// Get the number of hardlinks from a `FileInfo`.
///
/// @return number of hardlinks.
uint64_t os_fileinfo_hardlinks(const FileInfo *file_info)
FUNC_ATTR_NONNULL_ALL
{
return file_info->stat.st_nlink;
}
/// Get the `FileID` for a given path
///
/// @param path Path to the file.

14
test/unit/os/fs_spec.lua
View File

@ -47,6 +47,7 @@ describe('fs function', function()
os.remove('unit-test-directory/test.file')
os.remove('unit-test-directory/test_2.file')
os.remove('unit-test-directory/test_link.file')
os.remove('unit-test-directory/test_hlink.file')
lfs.rmdir('unit-test-directory')
end)
@ -611,6 +612,19 @@ describe('fs function', function()
end)
end)
describe('os_fileinfo_hardlinks', function()
it('returns the correct number of hardlinks', function()
local path = 'unit-test-directory/test.file'
local path_link = 'unit-test-directory/test_hlink.file'
local file_info = file_info_new()
assert.is_true(fs.os_get_file_info(path, file_info))
eq(1, fs.os_fileinfo_hardlinks(file_info))
lfs.link(path, path_link)
assert.is_true(fs.os_get_file_info(path, file_info))
eq(2, fs.os_fileinfo_hardlinks(file_info))
end)
end)
describe('os_get_file_id', function()
it('returns false if given an non-existing file', function()
local file_id = file_id_new()