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fileio: set group of backup file

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Restores code removed in #9709.

uv_fs_copyfile() copies the perm bits but not the group name.
https://github.com/libuv/libuv/pull/1547

ref #9709
ref #8288
This commit is contained in:
Justin M. Keyes
2019-05-20 22:43:10 +02:00
parent 7cc01c704c
commit 646c3423dd
2 changed files with 33 additions and 4 deletions
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17
src/nvim/fileio.c
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@@ -2868,6 +2868,23 @@ buf_write (
/* remove old backup, if present */
os_remove((char *)backup);
// set file protection same as original file, but
// strip s-bit.
(void)os_setperm((const char *)backup, perm & 0777);
#ifdef UNIX
//
// Try to set the group of the backup same as the original file. If
// this fails, set the protection bits for the group same as the
// protection bits for others.
//
if (file_info_new.stat.st_gid != file_info_old.stat.st_gid
&& os_chown((char *)backup, -1, file_info_old.stat.st_gid) != 0) {
os_setperm((const char *)backup,
(perm & 0707) | ((perm & 07) << 3));
}
#endif
// copy the file
if (os_copy((char *)fname, (char *)backup, UV_FS_COPYFILE_FICLONE)
!= 0) {