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/* ISC license. */
#include <sys/uio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <skalibs/djbunix.h>
#define SUFFIX ":skalibs-openwritevnclose:XXXXXX"
int openwritevnclose_internal (char const *fn, struct iovec const *v, unsigned int vlen, dev_t *dev, ino_t *ino, int dosync)
{
dev_t tmpdev ;
ino_t tmpino ;
size_t fnlen = strlen(fn) ;
int fd ;
char tmp[fnlen + sizeof(SUFFIX)] ;
memcpy(tmp, fn, fnlen) ;
memcpy(tmp + fnlen, SUFFIX, sizeof(SUFFIX)) ;
fd = mkstemp(tmp) ;
if (fd < 0) return 0 ;
if (!writevnclose_unsafe_internal(fd, v, vlen, dev ? &tmpdev : 0, ino ? &tmpino : 0, dosync)) goto failclose ;
if (rename(tmp, fn) < 0) goto fail ;
if (dev) *dev = tmpdev ;
if (ino) *ino = tmpino ;
return 1 ;
failclose:
fd_close(fd) ;
fail:
{
int e = errno ;
unlink(tmp) ;
errno = e ;
}
return 0 ;
}
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