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/* ISC license. */
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <skalibs/posixplz.h>
#include <skalibs/types.h>
#include <skalibs/tai.h>
#include <skalibs/cspawn.h>
#include <skalibs/strerr.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include <s6-rc/config.h>
#include <s6-rc/repo.h>
int s6rc_repo_compile (char const *repo, char const *set, char const *const *subs, uint8_t nsubs, char *oldc, unsigned int verbosity, char const *fdhuser)
{
size_t repolen = strlen(repo) ;
size_t setlen = strlen(set) ;
size_t totsublen = 0 ;
int needprefix = strcmp(set, ".ref") ;
char newc[repolen + setlen + 45] ;
memcpy(newc, repo, repolen) ;
memcpy(newc + repolen, "/compiled/.", 11) ;
memcpy(newc + repolen + 11, set, setlen) ;
newc[repolen + 11 + setlen] = ':' ;
timestamp_g(newc + repolen + 12 + setlen) ;
memcpy(newc + repolen + 37 + setlen, ":XXXXXX", 8) ;
memcpy(oldc, newc, repolen + 10) ;
if (mkntemp(newc) == -1) { strerr_warnfu2sys("mkntemp ", newc) ; return -1 ; }
for (uint8_t i = 0 ; i < nsubs ; i++) totsublen += strlen(subs[i]) + 1 ;
{
pid_t pid ;
size_t m = 0 ;
int wstat ;
char const *argv[9 + nsubs] ;
char fmtv[UINT_FMT] ;
char src[nsubs * (repolen + 10 + (needprefix ? setlen + 1 : 0)) + totsublen] ;
char *w = src ;
fmtv[uint_fmt(fmtv, verbosity)] = 0 ;
argv[m++] = S6RC_BINPREFIX "s6-rc-compile" ;
argv[m++] = "-v";
argv[m++] = fmtv ;
argv[m++] = "-b" ;
if (fdhuser)
{
argv[m++] = "-h" ;
argv[m++] = fdhuser ;
}
argv[m++] = "--" ;
argv[m++] = newc ;
for (uint8_t i = 0 ; i < nsubs ; i++)
{
size_t sublen = strlen(subs[i]) ;
argv[m++] = w ;
memcpy(w, repo, repolen) ; w += repolen ;
memcpy(w, "/sources/", 9) ; w += 9 ;
if (needprefix)
{
memcpy(w, set, setlen) ; w += setlen ;
*w++ = '/' ;
}
memcpy(w, subs[i], sublen+1) ; w += sublen + 1 ;
}
argv[m++] = 0 ;
pid = cspawn(argv[0], argv, (char const *const *)environ, 0, 0, 0) ;
if (!pid) { strerr_warnfu2sys("spawn ", argv[0]) ; return -1 ; }
if (wait_pid(pid, &wstat) == -1)
{
strerr_warnfu2sys("wait for ", argv[0]) ;
return -1 ;
}
if (WIFSIGNALED(wstat))
{
char fmt[UINT_FMT] ;
fmt[uint_fmt(fmt, WTERMSIG(wstat))] = 0 ;
strerr_warnf3x(argv[0], " crashed with signal ", fmt) ;
return -1 ;
}
if (WEXITSTATUS(wstat))
{
char fmt[UINT_FMT] ;
fmt[uint_fmt(fmt, WEXITSTATUS(wstat))] = 0 ;
strerr_warnf3x(argv[0], " exited with code ", fmt) ;
return (WEXITSTATUS(wstat) == 1) - 1 ;
}
}
{
char fn[repolen + setlen + 11] ;
memcpy(fn, newc, repolen + 10) ;
memcpy(fn + repolen + 10, set, setlen + 1) ;
if (!atomic_symlink4(newc + repolen + 10, fn, oldc + repolen + 10, setlen + 35))
{
int e = errno ;
rm_rf(newc) ;
errno = e ;
strerr_warnfu4sys("atomically symlink ", newc + repolen + 10, " to ", fn) ;
return -1 ;
}
}
return 1 + !!oldc[repolen + 10] ;
}
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