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/* ISC license. */
#include <unistd.h>
#include <signal.h>
#include <skalibs/uint.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr2.h>
#include <skalibs/sig.h>
#include <skalibs/djbunix.h>
#define USAGE "s6-setsid [ -s | -b | -f | -g ] [ -i | -I | -q ] [ -d ctty ] prog..."
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv, char const *const *envp)
{
unsigned int ctty = 0, what = 0, insist = 1 ;
PROG = "s6-setsid" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "sbfgiIqd:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 's' : what = 0 ; break ;
case 'b' : what = 1 ; break ;
case 'f' : what = 2 ; break ;
case 'g' : what = 3 ; break ;
case 'i' : insist = 2 ; break ;
case 'I' : insist = 1 ; break ;
case 'q' : insist = 0 ; break ;
case 'd' : if (!uint0_scan(l.arg, &ctty)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!argc) dieusage() ;
if (what)
{
if (setpgid(0, 0) < 0) switch (insist)
{
case 2 : strerr_diefu1sys(111, "setpgid") ;
case 1 : strerr_warnwu1sys("setpgid") ; break ;
default : break ;
}
if (what >= 2)
{
if (what == 3) sig_ignore(SIGTTOU) ;
if (tcsetpgrp(ctty, getpid()) < 0) switch (insist)
{
case 2 : strerr_diefu1sys(111, "tcsetpgrp") ;
case 1 : strerr_warnwu1sys("tcsetpgrp") ; break ;
default : break ;
}
if (what == 3) sig_restore(SIGTTOU) ;
}
}
else if (setsid() < 0) switch (insist)
{
case 2 : strerr_diefu1sys(111, "setsid") ;
case 1 : strerr_warnwu1sys("setsid") ; break ;
default : break ;
}
pathexec_run(argv[0], argv, envp) ;
strerr_dieexec(111, argv[0]) ;
}
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