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/* ISC license. */
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <skalibs/types.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/djbunix.h>
#include <skalibs/cspawn.h>
pid_t gcspawn (char const *prog, char const *const *argv, char const *const *envp, uint16_t flags, cspawn_fileaction const *fa, size_t n)
{
pid_t pid = 0 ;
int wstat ;
int p[2] ;
char pack[PID_PACK] ;
if (pipecoe(p) == -1) return 0 ;
pid = fork() ;
switch (pid)
{
case -1:
{
fd_close(p[1]) ;
fd_close(p[0]) ;
return 0 ;
}
case 0:
{
fd_close(p[0]) ;
pid = cspawn(prog, argv, envp, flags, fa, n) ;
if (!pid) _exit(errno) ;
pid_pack_big(pack, pid) ;
_exit(fd_write(p[1], pack, PID_PACK) < PID_PACK ? errno : 0) ;
}
}
fd_close(p[1]) ;
if (fd_read(p[0], pack, PID_PACK) < PID_PACK) goto err ;
fd_close(p[0]) ;
wait_pid(pid, &wstat) ;
pid_unpack_big(pack, &pid) ;
return pid ;
err:
fd_close(p[0]) ;
wait_pid(pid, &wstat) ;
return (errno = WIFSIGNALED(wstat) ? EINTR : WEXITSTATUS(wstat), 0) ;
}
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