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/* ISC license. */
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <skalibs/posixplz.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include <s6-rc/repo.h>
static void cleanup (char const *s)
{
int e = errno ;
rm_rf(s) ;
errno = e ;
}
int s6rc_repo_setcopy (char const *repo, char const *srcname, char const *dstname, unsigned int flags)
{
size_t repolen = strlen(repo) ;
size_t srclen = strlen(srcname) ;
size_t dstlen = strlen(dstname) ;
size_t r ;
char src[repolen + srclen + 10] ;
char dst[repolen + dstlen + 10] ;
char realsrc[repolen + srclen + 18] ;
char realdst[repolen + dstlen + 18] ;
char olddst[repolen + dstlen + 18] ;
memcpy(src, repo, repolen) ;
memcpy(src + repolen, "/sources/", 9) ;
memcpy(src + repolen + 9, srcname, srclen + 1) ;
memcpy(dst, src, repolen + 9) ;
memcpy(dst + repolen + 9, dstname, dstlen + 1) ;
memcpy(olddst, dst, repolen + 9) ;
olddst[repolen + 9] = 0 ;
if (access(dst, F_OK) == -1)
{
if (errno != ENOENT) return errno ;
}
else if (!(flags & 1)) return -1 ;
memcpy(realsrc, src, repolen + 9) ;
r = readlink(src, realsrc + repolen + 9, srclen + 9) ;
if (r == -1) return errno ;
if (r != srclen + 8) return -2 ;
realsrc[repolen + srclen + 17] = 0 ;
memcpy(realdst, dst, repolen + 9) ;
realdst[repolen + 9] = '.' ;
memcpy(realdst + repolen + 10, dstname, dstlen) ;
memcpy(realdst + repolen + 10 + dstlen, ":XXXXXX", 8) ;
if (mkntemp(realdst) == -1) return errno ;
if (!hiercopy(realsrc, realdst))
{
cleanup(realdst) ;
return errno ;
}
if (!atomic_symlink4(realdst + repolen + 9, dst, olddst + repolen + 9, dstlen + 9))
{
cleanup(realdst) ;
return errno ;
}
if (olddst[repolen + 9]) cleanup(olddst) ;
return 0 ;
}
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