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/* ISC license. */
#include <stdint.h>
#include <unistd.h>
#include <skalibs/posixplz.h>
#include <skalibs/strerr2.h>
#include <skalibs/env.h>
#include <skalibs/djbunix.h>
#include "s6tls-internal.h"
#define MAXENVSIZE 2048
void s6tls_sync_and_exec_app (char const *const *argv, int const p[4][2], pid_t pid, uint32_t options)
{
char buf[sizeof(s6tls_envvars) + MAXENVSIZE] ;
size_t m = 0 ;
ssize_t r ;
close(p[2][1]) ;
close(p[1][1]) ;
close(p[0][0]) ;
if (fd_move(p[3][0], p[1][0]) < 0 || fd_move(p[3][1], p[0][1]) < 0)
strerr_diefu1sys(111, "move file descriptors") ;
if (options & 1)
{
memcpy(buf + m, s6tls_envvars, sizeof(s6tls_envvars)) ;
m += sizeof(s6tls_envvars) ;
}
r = read(p[2][0], buf + m, MAXENVSIZE) ;
if (r < 0) strerr_diefu1sys(111, "read from handshake notification pipe") ;
if (!r)
{
int wstat ;
if (wait_pid(pid, &wstat) < 0)
strerr_diefu1sys(111, "wait") ;
_exit(wait_estatus(wstat)) ;
}
if (r >= MAXENVSIZE)
strerr_dief1x(100, "SSL data too large") ;
m += r - 1 ;
xpathexec_r(argv, (char const *const *)environ, env_len((char const *const *)environ), buf, m) ;
}
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