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job_init(): don't call setpgid() if non-interactive (re: 41ebb55a)

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This returns job_init() to a version quite close to the original
93u+ version. Upon further code analysis, really everything after
the init_savelist() call is only relevant to interactive shells, so
we can just return at that point for non-interactive shells as 93u+
did. All the script-only job control regression tests still pass.

Resolves: https://github.com/ksh93/ksh/issues/320
This commit is contained in:
Martijn Dekker 2022-08-25 16:33:34 +01:00
parent 58233b4c50
commit 713260340b
1 changed files with 24 additions and 33 deletions
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19
src/cmd/ksh93/sh/jobs.c
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@ -540,9 +540,9 @@ void job_init(int lflag)
# endif
if(njob_savelist < NJOB_SAVELIST)
init_savelist();
if(!sh_isoption(SH_INTERACTIVE))
return;
/* use new line discipline when available */
if(sh_isoption(SH_INTERACTIVE))
{
#ifdef NTTYDISC
# ifdef FIOLOOKLD
if((job.linedisc = ioctl(JOBTTY, FIOLOOKLD, 0)) <0)
@ -560,9 +560,7 @@ void job_init(int lflag)
}
if(job.linedisc==NTTYDISC)
job.linedisc = -1;
}
#endif /* NTTYDISC */
job.mypgid = getpgrp();
/* some systems have job control, but not initialized */
if(job.mypgid<=0)
@ -574,8 +572,6 @@ void job_init(int lflag)
#ifndef SIGTSTP
setpgid(0,sh.pid);
#endif /*SIGTSTP */
if(sh_isoption(SH_INTERACTIVE))
{
if(job.mypgid<0 || !(ttynam=ttyname(JOBTTY)))
return;
while(close(JOBTTY)<0 && errno==EINTR)
@ -587,12 +583,11 @@ void job_init(int lflag)
#ifdef SIGTSTP
tcsetpgrp(JOBTTY,sh.pid);
#endif /* SIGTSTP */
}
job.mypgid = sh.pid;
}
#ifdef SIGTSTP
possible = (setpgid(0,job.mypgid) >= 0) || errno==EPERM;
if(sh_isoption(SH_INTERACTIVE) && possible)
if(possible)
{
/* wait until we are in the foreground */
while((job.mytgid=tcgetpgrp(JOBTTY)) != job.mypgid)
@ -611,10 +606,9 @@ void job_init(int lflag)
}
}
#endif /* SIGTTIN */
#ifdef NTTYDISC
/* set the line discipline */
if(sh_isoption(SH_INTERACTIVE) && job.linedisc>=0)
if(job.linedisc>=0)
{
int linedisc = NTTYDISC;
# ifdef FIOPUSHLD
@ -635,17 +629,14 @@ void job_init(int lflag)
errormsg(SH_DICT,0,e_newtty);
else
job.linedisc = -1;
#endif /* NTTYDISC */
}
#endif /* NTTYDISC */
if(!possible)
return;
#ifdef SIGTSTP
/* make sure that we are a process group leader */
setpgid(0,sh.pid);
job.mypid = sh.pid;
if(!sh_isoption(SH_INTERACTIVE))
return;
# if defined(SA_NOCLDSTOP) || defined(SA_NOCLDWAIT)
# if !defined(SA_NOCLDSTOP)
# define SA_NOCLDSTOP 0