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-rw-r--r--src/libunixonacid/dd_commit.c68
1 files changed, 0 insertions, 68 deletions
diff --git a/src/libunixonacid/dd_commit.c b/src/libunixonacid/dd_commit.c
deleted file mode 100644
index 1c940d2..0000000
--- a/src/libunixonacid/dd_commit.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/* ISC license. */
-
-#include <unistd.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <skalibs/stralloc.h>
-#include <skalibs/djbunix.h>
-#include <skalibs/random.h>
-#include <skalibs/unix-transactional.h>
-
-static char const *mybasename (char const *s, size_t len)
-{
- size_t i = len ;
- while (i--) if (s[i] == '/') return s + i + 1 ;
- return s ;
-}
-
-int dd_commit (dirdescriptor_t *dd)
-{
- dirdescriptor_t zero = DIRDESCRIPTOR_ZERO ;
- size_t len = strlen(dd->lnkfn) ;
- size_t oldbase = dd->new.len ;
- size_t newlnkbase ;
- char const *lnkbn = mybasename(dd->lnkfn, len) ;
- if (!sadirname(&dd->new, dd->lnkfn, len)) return 0 ;
- if (!stralloc_catb(&dd->new, "/", 1)) goto fail ;
- if (sareadlink(&dd->new, dd->lnkfn) < 0)
- {
- size_t lnkbnbase = dd->new.len ;
- if (errno != EINVAL) goto fail ;
- if (!stralloc_cats(&dd->new, lnkbn)) goto fail ;
- if (!random_sauniquename(&dd->new, 8)) goto fail ;
- if (!stralloc_0(&dd->new)) goto fail ;
- if (rename(dd->lnkfn, dd->new.s + oldbase) < 0) goto fail ;
- /* /!\ race condition right here: there's no lnkfn in the fs */
- if (symlink(dd->new.s + lnkbnbase, dd->lnkfn) < 0) /* now that's VERY BAD if it fails */
- {
- int e = errno ;
- rename(dd->new.s + oldbase, dd->lnkfn) ; /* attempt to revert to initial situation */
- errno = e ;
- goto fail ; /* and hope for the best */
- }
- }
- if (!stralloc_0(&dd->new)) goto fail ;
- newlnkbase = dd->new.len ;
- if (!stralloc_catb(&dd->new, dd->lnkfn, len)) goto fail ;
- if (!random_sauniquename(&dd->new, 8)) goto fail ;
- if (!stralloc_0(&dd->new)) goto fail ;
- if (symlink(dd->new.s, dd->new.s + newlnkbase) < 0) goto fail ;
- if (rename(dd->new.s + newlnkbase, dd->lnkfn) < 0)
- {
- int e = errno ;
- unlink(dd->new.s + newlnkbase) ;
- errno = e ;
- goto fail ;
- }
- fd_close(dd->fd) ;
- dd->new.len = newlnkbase ;
- rm_rf_in_tmp(&dd->new, oldbase) ;
- stralloc_free(&dd->new) ;
- *dd = zero ;
- return 1 ;
-
- fail:
- dd->new.len = oldbase ;
- return 0 ;
-}