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/* ISC license. */
#include <skalibs/nonposix.h> /* mkdtemp */
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <skalibs/uint16.h>
#include <skalibs/stat.h>
#include <skalibs/direntry.h>
#include <skalibs/posixplz.h>
#include <skalibs/strerr.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
#include <skalibs/skamisc.h>
#include <skalibs/unix-transactional.h>
#include <s6-rc/repo.h>
static inline void cleanup (char const *ato, char const *bun)
{
int e = errno ;
rm_rf(ato) ;
rm_rf(bun) ;
errno = e ;
}
int s6rc_repo_sync (char const *repo, unsigned int verbosity, char const *fdhuser)
{
size_t repolen = strlen(repo) ;
mode_t m ;
char store[repolen + 13] ;
char ato[repolen + 26] ;
char bun[repolen + 26] ;
memcpy(store, repo, repolen) ;
memcpy(store + repolen, "/stores/", 8) ;
store[repolen + 12] = 0 ;
/* Fill new .atomics/ and .bundles/ with symlinks to real stores */
memcpy(ato, repo, repolen) ;
memcpy(ato + repolen, "/sources/..atomics:XXXXXX", 26) ;
memcpy(bun, ato, repolen + 26) ;
memcpy(bun + repolen + 11, "bundle", 6) ;
m = umask(0) ;
if (!mkdtemp(ato))
{
strerr_warnfu2sys("mkdtemp ", ato) ;
umask(m) ;
return -1 ;
}
if (chmod(ato, 02755) == -1)
{
strerr_warnfu2sys("chmod ", ato) ;
umask(m) ;
return -1 ;
}
if (!mkdtemp(bun))
{
strerr_warnfu2sys("mkdtemp ", bun) ;
rmdir(ato) ;
umask(m) ;
return -1 ;
}
umask(m) ;
if (chmod(bun, 02755) == -1)
{
strerr_warnfu2sys("chmod ", bun) ;
return -1 ;
}
for (uint16_t istore = 0 ;; istore++)
{
DIR *dir ;
uint160_xfmt(store + repolen + 8, istore, 4) ;
dir = opendir(store) ;
if (!dir)
{
strerr_warnfu2sys("opendir ", store) ;
goto err ;
}
for (;;)
{
size_t len ;
direntry *d ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.') continue ;
len = strlen(d->d_name) ;
{
char const *x ;
char dst[repolen + 27 + len] ;
char src[19 + len] ;
char oldsrc[19 + len] ;
char fn[repolen + 14 + len] ;
oldsrc[0] = 0 ;
memcpy(src, "../../stores/", 13) ;
memcpy(src + 13, store + repolen + 8, 4) ;
src[17] = '/' ;
memcpy(src + 18, d->d_name, len+1) ;
memcpy(fn, store, repolen + 12) ;
fn[repolen + 12] = '/' ;
memcpy(fn + repolen + 13, d->d_name, len+1) ;
switch (s6rc_repo_type_check(fn))
{
case 1 :
case 2 : x = ato ; break ;
case 3 : x = bun ; break ;
case 0 :
strerr_warnf2x("invalid service type for ", fn) ;
dir_close(dir) ;
goto err ;
default :
strerr_warnfu2sys("check service type of ", fn) ;
dir_close(dir) ;
goto err ;
}
memcpy(dst, x, repolen + 25) ;
dst[repolen + 25] = '/' ;
memcpy(dst + repolen + 26, d->d_name, len+1) ;
if (!atomic_symlink4(src, dst, oldsrc, 19 + len))
{
strerr_warnfu4sys("symlink ", src, " to ", dst) ;
dir_close(dir) ;
goto err ;
}
if (oldsrc[0] && verbosity)
{
oldsrc[17] = 0 ;
strerr_warnw6x("service ", d->d_name, " provided in store ", oldsrc + 13, "; overridden by new definition in store ", store + repolen + 8) ;
}
}
}
dir_close(dir) ;
if (errno)
{
strerr_warnfu2sys("readdir ", store) ;
goto err ;
}
}
/* Compile the reference db - also checks consistency of new stores */
{
char const *rxs[2] = { ato + repolen + 9, bun + repolen + 9 } ;
char oldc[repolen + 49] ;
int r = s6rc_repo_compile(repo, ".ref", rxs, 2, oldc, verbosity, fdhuser) ;
if (r < 0) goto err ;
if (!r) { cleanup(ato, bun) ; return 0 ; }
if (r == 2) rm_rf(oldc) ;
}
/* Switch, delete links to old stores */
{
char fn[repolen + 18] ;
char oldato[17] ;
char oldbun[17] ;
memcpy(fn, repo, repolen) ;
memcpy(fn + repolen, "/sources/.atomics", 18) ;
if (!atomic_symlink4(ato + repolen + 9, fn, oldato, 17)) goto err ;
memcpy(fn + repolen + 10, "bundle", 6) ;
if (!atomic_symlink4(bun + repolen + 9, fn, oldbun, 17))
{
strerr_warnfu4sys("symlink ", bun + repolen + 9, " to ", fn) ;
memcpy(fn + repolen + 10, "atomic", 6) ;
if (!atomic_symlink4(oldato, fn, 0, 0))
{
strerr_warnfu6sys("symlink ", oldato, " back to ", fn, " - weird race, manually check ", repo) ;
goto err ;
}
goto err ;
}
if (oldato[0])
{
memcpy(ato + repolen + 9, oldato, 16) ;
rm_rf(ato) ;
}
if (oldbun[0])
{
memcpy(bun + repolen + 9, oldbun, 16) ;
rm_rf(bun) ;
}
}
/* Update the existing sets */
ato[repolen + 8] = 0 ;
{
stralloc sa = STRALLOC_ZERO ;
genalloc ga = GENALLOC_ZERO ; /* size_t */
DIR *dir = opendir(ato) ;
if (!dir)
{
strerr_warnfu2sys("opendir ", ato) ;
return -1 ;
}
for (;;)
{
direntry *d ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.') continue ;
if (!s6rc_repo_syncset_tmp(repo, d->d_name, &sa, &ga, verbosity)) break ;
}
dir_close(dir) ;
genalloc_free(size_t, &ga) ;
stralloc_free(&sa) ;
if (errno)
{
strerr_warnfu2sys("readdir ", ato) ;
return -1 ;
}
}
return 1 ;
err:
cleanup(ato, bun) ;
return -1 ;
}
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