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/* ISC license. */
#include <skalibs/bsdsnowflake.h> /* stat */
#include <skalibs/nonposix.h> /* mkdtemp */
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.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/unix-transactional.h>
#include <s6-rc/repo.h>
static inline void cleanup (char const *fn)
{
int e = errno ;
rm_rf(fn) ;
errno = e ;
}
int s6rc_repo_sync (char const *repo, char const *const *sources, size_t sourceslen, unsigned int verbosity)
{
stralloc sa = STRALLOC_ZERO ;
size_t repolen = strlen(repo) ;
char newdir[repolen + 24] ;
memcpy(newdir, repo, repolen) ;
memcpy(newdir + repolen, "/.everything:cur:XXXXXX", 24) ;
if (!mkdtemp(newdir))
{
strerr_warnfu2sys("mkdtemp ", newdir) ;
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) ;
{
struct stat st ;
char dst[repolen + 25 + len] ;
char src[srclen + len + 2] ;
memcpy(dst, newdir, repolen + 23) ;
dst[repolen + 23] = '/' ;
memcpy(dst + repolen + 24, d->d_name, len + 1) ;
memcpy(src, sources[i], srclen) ;
src[srclen] = '/' ;
memcpy(src + srclen + 1, d->d_name, len + 1) ;
if (stat(src, &st) == -1)
{
if (verbosity) strerr_warnwu2sys("stat ", src) ;
continue ;
}
if (!S_ISDIR(st.st_mode))
{
errno = ENOTDIR ;
if (verbosity) strerr_warnwu2sys("link ", src) ;
continue ;
}
if (symlink(src, dst) == -1)
{
if (errno != EEXIST)
{
strerr_warnfu4sys("symlink ", src, " to ", dst) ;
dir_close(dir) ;
goto err ;
}
if (verbosity)
{
sa.len = 0 ;
if (!sareadlink(&sa, dst) || !stralloc_0(&sa))
{
strerr_warnwu2sys("readlink ", dst) ;
errno = EEXIST ;
strerr_warnwu4sys("symlink ", src, " to ", dst) ;
}
else
strerr_warnwu6x("symlink ", src, " to ", dst, ": service is already provided by ", sa.s) ;
}
}
}
}
dir_close(dir) ;
if (errno)
{
strerr_warnfu2sys("readdir ", sources[i]) ;
goto err ;
}
}
if (chmod(newdir, 02755) == -1)
{
goto err ;
}
{
char curdir[repolen + 13] ;
memcpy(curdir, repo, repolen) ;
memcpy(curdir + repolen, "/.everything", 13) ;
if (!atomic_symlink(newdir + repolen + 1, curdir, "tmp")) goto err ;
}
stralloc_free(&sa) ;
return s6rc_repo_cleanup(repo) ;
err:
stralloc_free(&sa) ;
cleanup(newdir) ;
return 0 ;
}
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