/* change a Flag(*) value; takes care of special actions */
void
change_flag(enum sh_flag f,
int what, /* flag to change */
int newval) /* what is changing the flag (command line vs set) */
{
int oldval;
oldval = Flag(f);
Flag(f) = newval;
#ifdef JOBS
if (f == FMONITOR) {
if (what != OF_CMDLINE && newval != oldval)
j_change();
} else
#endif /* JOBS */
#ifdef EDIT
if (0
# ifdef VI
|| f == FVI
# endif /* VI */
# ifdef EMACS
|| f == FEMACS || f == FGMACS
# endif /* EMACS */
)
{
if (newval) {
# ifdef VI
Flag(FVI) = 0;
# endif /* VI */
# ifdef EMACS
Flag(FEMACS) = Flag(FGMACS) = 0;
# endif /* EMACS */
Flag(f) = newval;
}
} else
#endif /* EDIT */
/* Turning off -p? */
if (f == FPRIVILEGED && oldval && !newval) {
gid_t gid = getgid();
setresgid(gid, gid, gid);
setgroups(1, &gid);
setresuid(ksheuid, ksheuid, ksheuid);
} else if (f == FPOSIX && newval) {
#ifdef BRACE_EXPAND
Flag(FBRACEEXPAND) = 0
#endif /* BRACE_EXPAND */
;
}
/* Changing interactive flag? */
if (f == FTALKING) {
if ((what == OF_CMDLINE || what == OF_SET) && procpid == kshpid)
Flag(FTALKING_I) = newval;
}
}
/* job cleanup before shell exit */
void
j_exit(void)
{
/* kill stopped, and possibly running, jobs */
Job *j;
int killed = 0;
for (j = job_list; j != (Job *) 0; j = j->next) {
if (j->ppid == procpid &&
(j->state == PSTOPPED ||
(j->state == PRUNNING &&
((j->flags & JF_FG) ||
(Flag(FLOGIN) && !Flag(FNOHUP) && procpid == kshpid))))) {
killed = 1;
if (j->pgrp == 0)
kill_job(j, SIGHUP);
else
killpg(j->pgrp, SIGHUP);
#ifdef JOBS
if (j->state == PSTOPPED) {
if (j->pgrp == 0)
kill_job(j, SIGCONT);
else
killpg(j->pgrp, SIGCONT);
}
#endif /* JOBS */
}
}
if (killed)
sleep(1);
j_notify();
#ifdef JOBS
if (kshpid == procpid && restore_ttypgrp >= 0) {
/* Need to restore the tty pgrp to what it was when the
* shell started up, so that the process that started us
* will be able to access the tty when we are done.
* Also need to restore our process group in case we are
* about to do an exec so that both our parent and the
* process we are to become will be able to access the tty.
*/
tcsetpgrp(tty_fd, restore_ttypgrp);
setpgid(0, restore_ttypgrp);
}
if (Flag(FMONITOR)) {
Flag(FMONITOR) = 0;
j_change();
}
#endif /* JOBS */
}
/* change a Flag(*) value; takes care of special actions */
void
change_flag(enum sh_flag f, int what, unsigned int newval)
{
unsigned char oldval;
oldval = Flag(f);
Flag(f) = newval ? 1 : 0; /* needed for tristates */
#ifndef MKSH_UNEMPLOYED
if (f == FMONITOR) {
if (what != OF_CMDLINE && newval != oldval)
j_change();
} else
#endif
if ((
#if !MKSH_S_NOVI
f == FVI ||
#endif
f == FEMACS || f == FGMACS) && newval) {
#if !MKSH_S_NOVI
Flag(FVI) =
#endif
Flag(FEMACS) = Flag(FGMACS) = 0;
Flag(f) = (unsigned char)newval;
} else if (f == FPRIVILEGED && oldval && !newval) {
/* Turning off -p? */
#if HAVE_SETRESUGID
gid_t kshegid = getgid();
setresgid(kshegid, kshegid, kshegid);
#if HAVE_SETGROUPS
setgroups(1, &kshegid);
#endif
setresuid(ksheuid, ksheuid, ksheuid);
#else
seteuid(ksheuid = kshuid = getuid());
setuid(ksheuid);
setegid(kshegid = kshgid = getgid());
setgid(kshegid);
#endif
} else if ((f == FPOSIX || f == FSH) && newval) {
Flag(FPOSIX) = Flag(FSH) = Flag(FBRACEEXPAND) = 0;
Flag(f) = (unsigned char)newval;
}
/* Changing interactive flag? */
if (f == FTALKING) {
if ((what == OF_CMDLINE || what == OF_SET) && procpid == kshpid)
Flag(FTALKING_I) = (unsigned char)newval;
}
}
/* initialize job control */
void
j_init(int mflagset)
{
if(!child_max)
child_max = sysconf(_SC_CHILD_MAX);
sigemptyset(&sm_default);
sigprocmask(SIG_SETMASK, &sm_default, (sigset_t *) 0);
sigemptyset(&sm_sigchld);
sigaddset(&sm_sigchld, SIGCHLD);
setsig(&sigtraps[SIGCHLD], j_sigchld,
SS_RESTORE_ORIG|SS_FORCE|SS_SHTRAP);
#ifdef JOBS
if (!mflagset && Flag(FTALKING))
Flag(FMONITOR) = 1;
/* shl_j is used to do asynchronous notification (used in
* an interrupt handler, so need a distinct shf)
*/
shl_j = shf_fdopen(2, SHF_WR, (struct shf *) 0);
if (Flag(FMONITOR) || Flag(FTALKING)) {
int i;
/* the TF_SHELL_USES test is a kludge that lets us know if
* if the signals have been changed by the shell.
*/
for (i = NELEM(tt_sigs); --i >= 0; ) {
sigtraps[tt_sigs[i]].flags |= TF_SHELL_USES;
/* j_change() sets this to SS_RESTORE_DFL if FMONITOR */
setsig(&sigtraps[tt_sigs[i]], SIG_IGN,
SS_RESTORE_IGN|SS_FORCE);
}
}
/* j_change() calls tty_init() */
if (Flag(FMONITOR))
j_change();
else
#endif /* JOBS */
if (Flag(FTALKING))
tty_init(true);
}
/* change a Flag(*) value; takes care of special actions */
void
change_flag(enum sh_flag f, int what, bool newset)
{
unsigned char oldval;
unsigned char newval = (newset ? 1 : 0);
if (f == FXTRACE) {
change_xtrace(newval, true);
return;
}
oldval = Flag(f);
Flag(f) = newval = (newset ? 1 : 0);
#ifndef MKSH_UNEMPLOYED
if (f == FMONITOR) {
if (what != OF_CMDLINE && newval != oldval)
j_change();
} else
#endif
#ifndef MKSH_NO_CMDLINE_EDITING
if ((
#if !MKSH_S_NOVI
f == FVI ||
#endif
f == FEMACS || f == FGMACS) && newval) {
#if !MKSH_S_NOVI
Flag(FVI) =
#endif
Flag(FEMACS) = Flag(FGMACS) = 0;
Flag(f) = newval;
} else
#endif
if (f == FPRIVILEGED && oldval && !newval) {
/* Turning off -p? */
/*XXX this can probably be optimised */
kshegid = kshgid = getgid();
ksheuid = kshuid = getuid();
#if HAVE_SETRESUGID
DO_SETUID(setresgid, (kshegid, kshegid, kshegid));
#if HAVE_SETGROUPS
/* setgroups doesn't EAGAIN on Linux */
setgroups(1, &kshegid);
#endif
DO_SETUID(setresuid, (ksheuid, ksheuid, ksheuid));
#else /* !HAVE_SETRESUGID */
/* setgid, setegid, seteuid don't EAGAIN on Linux */
setgid(kshegid);
#ifndef MKSH__NO_SETEUGID
setegid(kshegid);
#endif
DO_SETUID(setuid, (ksheuid));
#ifndef MKSH__NO_SETEUGID
seteuid(ksheuid);
#endif
#endif /* !HAVE_SETRESUGID */
} else if ((f == FPOSIX || f == FSH) && newval) {
/* Turning on -o posix or -o sh? */
Flag(FBRACEEXPAND) = 0;
} else if (f == FTALKING) {
/* Changing interactive flag? */
if ((what == OF_CMDLINE || what == OF_SET) && procpid == kshpid)
Flag(FTALKING_I) = newval;
}
}
