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/* ISC license. */
#include <sys/wait.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <skalibs/posixplz.h>
#include <skalibs/types.h>
#include <skalibs/strerr.h>
#include <skalibs/stralloc.h>
#include <skalibs/genalloc.h>
#include <skalibs/cspawn.h>
#include <skalibs/djbunix.h>
#include <s6-rc/config.h>
#include <s6-rc/repo.h>
int s6rc_repo_flattenservices (char const *repo, char const *const *services, uint32_t n, stralloc *storage, genalloc *indices)
{
int swasnull = !storage->s ;
int gwasnull = !indices->s ;
size_t sabase = storage->len ;
size_t gabase = genalloc_len(size_t, indices) ;
{
size_t m = 0 ;
size_t repolen = strlen(repo) ;
pid_t pid ;
int fd ;
int wstat ;
char const *argv[7 + n] ;
char refdb[repolen + 15] ;
memcpy(refdb, repo, repolen) ;
memcpy(refdb + repolen, "/compiled/.ref", 15) ;
argv[m++] = S6RC_BINPREFIX "s6-rc-db" ;
argv[m++] = "-c";
argv[m++] = refdb ;
argv[m++] = "-b" ;
argv[m++] = "--" ;
argv[m++] = "atomics" ;
for (size_t i = 0 ; i < n ; i++) argv[m++] = services[i] ;
argv[m++] = 0 ;
pid = child_spawn1_pipe(argv[0], argv, (char const *const *)environ, &fd, 1) ;
if (!pid) { strerr_warnfu2sys("spawn ", argv[0]) ; return 111 ; }
if (!slurpn(fd, storage, 0)) { strerr_warnfu2sys("read output from ", argv[0]) ; return 111 ; }
fd_close(fd) ;
if (wait_pid(pid, &wstat) == -1)
{
strerr_warnfu2sys("wait for ", argv[0]) ;
goto err ;
}
if (WIFSIGNALED(wstat))
{
char fmt[UINT_FMT] ;
fmt[uint_fmt(fmt, WTERMSIG(wstat))] = 0 ;
strerr_warnf3x(argv[0], " crashed with signal ", fmt) ;
goto err ;
}
if (WEXITSTATUS(wstat)) return WEXITSTATUS(wstat) ;
}
if (!s6rc_repo_nlto0(storage->s + sabase, sabase, storage->len, indices)) goto err ;
return 0 ;
err:
if (gwasnull) genalloc_free(size_t, indices) ;
else genalloc_setlen(size_t, indices, gabase) ;
if (swasnull) stralloc_free(storage) ;
else storage->len = sabase ;
return 111 ;
}
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