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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/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/s6rc-utils.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 ;
}
static int s6rc_repo_syncsub (char const *repo, char const *set, char const *sub, uint32_t where, stralloc *sa, genalloc *ga, unsigned int verbosity)
{
size_t repolen = strlen(repo) ;
size_t setlen = strlen(set) ;
size_t sublen = strlen(sub) ;
size_t subfnlen = repolen + setlen + sublen + 10 ;
char subfn[subfnlen + 1] ;
memcpy(subfn, repo, repolen) ;
memcpy(subfn + repolen, "/sources/", 9) ;
memcpy(subfn + repolen + 9, set, setlen) ;
subfn[repolen + 9 + setlen] = '/' ;
memcpy(subfn + repolen + 10 + setlen, sub, sublen + 1) ;
DIR *dir = opendir(subfn) ;
if (!dir)
{
strerr_warnfu2sys("opendir ", subfn) ;
return 0 ;
}
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 fn[subfnlen + len + 2] ;
memcpy(fn, subfn, sublen) ;
fn[sublen] = '/' ;
memcpy(fn + sublen + 1, d->d_name, len+1) ;
if (access(fn, F_OK) == -1)
{
if (errno != ENOENT)
{
strerr_warnfu2sys("access ", fn) ;
goto err ;
}
unlink_void(fn) ;
if (verbosity >= 2)
strerr_warni6x("service ", d->d_name, " does not exist anymore, removed from sub ", sub, " of set ", set) ;
}
else
{
if (!genalloc_append(size_t, ga, &sa->len)) goto err ;
if (!stralloc_catb(sa, d->d_name, len+1)) goto err ;
}
}
if (errno)
{
strerr_warnfu2sys("readdir ", subfn) ;
goto err ;
}
dir_close(dir) ;
return 1 ;
err:
dir_close(dir) ;
return 0 ;
}
static inline int s6rc_repo_syncset (char const *repo, size_t repolen, char const *set, stralloc *sa, genalloc *ga, unsigned int verbosity)
{
static char const subs[3][7] = { "masked", "active", "onboot" } ;
for (unsigned int i = 0 ; i < 3 ; i++)
if (s6rc_repo_syncsub(repo, set, subs[i], i, sa, ga, verbosity)) goto err ;
size_t n = genalloc_len(size_t, ga) ;
if (!n)
{
if (!s6rc_repo_fillset(repo, set)) goto err ;
}
sa->len = 0 ;
genalloc_setlen(size_t, ga, 0) ;
return 1 ;
err:
sa->len = 0 ;
genalloc_setlen(size_t, ga, 0) ;
return 0 ;
}
int s6rc_repo_sync (char const *repo, char const *const *sources, size_t sourceslen, unsigned int verbosity, char const *fdhuser)
{
size_t repolen = strlen(repo) ;
char ato[repolen + 26] ;
char bun[repolen + 26] ;
/* Fill new .atomics/ and .bundles/ with symlinks to real sources */
memcpy(ato, repo, repolen) ;
memcpy(ato + repolen, "/sources/..atomics:XXXXXX", 26) ;
memcpy(bun, ato, repolen + 26) ;
memcpy(bun + repolen + 11, "bundle", 6) ;
if (!mkdtemp(ato))
{
strerr_warnfu2sys("mkdtemp ", ato) ;
return 0 ;
}
if (chmod(ato, 02755) == -1)
{
strerr_warnfu2sys("chmod ", ato) ;
return 0 ;
}
if (!mkdtemp(bun))
{
strerr_warnfu2sys("mkdtemp ", bun) ;
rmdir(ato) ;
return 0 ;
}
if (chmod(bun, 02755) == -1)
{
strerr_warnfu2sys("chmod ", bun) ;
return 0 ;
}
for (size_t i = 0 ; i < sourceslen ; i++)
{
size_t srclen = strlen(sources[i]) ;
DIR *dir = opendir(sources[i]) ;
if (!dir)
{
strerr_warnfu2sys("opendir ", sources[i]) ;
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 + 28 + len] ;
char src[srclen + len + 2] ;
memcpy(src, sources[i], srclen) ;
src[srclen] = '/' ;
memcpy(src + srclen + 1, d->d_name, len+1) ;
switch (s6rc_type_check(-1, src))
{
case 1 :
case 2 : x = ato ; break ;
case 3 : x = bun ; break ;
case 0 :
strerr_warnf2x("invalid service type for ", src) ;
dir_close(dir) ;
goto err ;
default :
strerr_warnfu2sys("check service type of ", src) ;
dir_close(dir) ;
goto err ;
}
memcpy(dst, x, repolen + 26) ;
dst[repolen + 26] = '/' ;
memcpy(dst + repolen + 27, d->d_name, len+1) ;
if (symlink(src, dst) == -1)
{
if (errno != EEXIST)
{
strerr_warnfu4sys("symlink ", src, " to ", dst) ;
dir_close(dir) ;
goto err ;
}
if (verbosity)
{
if (!sareadlink(&satmp, dst) || !stralloc_0(&satmp))
{
strerr_warnwu2sys("readlink ", dst) ;
errno = EEXIST ;
strerr_warnwu4sys("symlink ", src, " to ", dst) ;
}
else
strerr_warnwu6x("symlink ", src, " to ", dst, ": already provided by ", satmp.s) ;
satmp.len = 0 ;
}
}
}
}
dir_close(dir) ;
if (errno)
{
strerr_warnfu2sys("readdir ", sources[i]) ;
goto err ;
}
}
/* Compile the reference db - also checks new sources consistency */
{
char const *subs[2] = { ato + repolen + 9, bun + repolen + 9 } ;
char oldc[repolen + 49] ;
int r = s6rc_repo_compile(repo, ".ref", subs, 2, oldc, verbosity, fdhuser) ;
if (r <= 0) goto err ;
if (r == 2) rm_rf(oldc) ;
}
/* Switch to the new sources, delete the old ones */
{
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 ;
}
memcpy(ato + repolen + 9, oldato, 16) ;
memcpy(bun + repolen + 9, oldbun, 16) ;
cleanup(ato, 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 0 ;
}
for (;;)
{
direntry *d ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.') continue ;
if (!s6rc_repo_syncset(repo, repolen, 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 0 ;
}
}
return 1 ;
err:
cleanup(ato, bun) ;
return 0 ;
}
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