static int
call_builtin(struct tbl *tp, const char **wp, const char *where)
{
int rv;
if (!tp)
internal_errorf("%s: %s", where, wp[0]);
builtin_argv0 = wp[0];
builtin_flag = tp->flag;
shf_reopen(1, SHF_WR, shl_stdout);
shl_stdout_ok = true;
ksh_getopt_reset(&builtin_opt, GF_ERROR);
rv = (*tp->val.f)(wp);
shf_flush(shl_stdout);
shl_stdout_ok = false;
builtin_flag = 0;
builtin_argv0 = NULL;
return (rv);
}
static int
call_builtin(struct tbl *tp, const char **wp, const char *where, bool resetspec)
{
int rv;
if (!tp)
internal_errorf("%s: %s", where, wp[0]);
builtin_argv0 = wp[0];
builtin_spec = tobool(!resetspec &&
/*XXX odd use of KEEPASN */
((tp->flag & SPEC_BI) || (Flag(FPOSIX) && (tp->flag & KEEPASN))));
shf_reopen(1, SHF_WR, shl_stdout);
shl_stdout_ok = true;
ksh_getopt_reset(&builtin_opt, GF_ERROR);
rv = (*tp->val.f)(wp);
shf_flush(shl_stdout);
shl_stdout_ok = false;
builtin_argv0 = NULL;
builtin_spec = false;
return (rv);
}
/* Open a file. First three args are for open(), last arg is flags for
* this package. Returns NULL if file could not be opened, or if a dup
* fails.
*/
struct shf *
shf_open(const char *name, int oflags, int mode, int sflags)
{
struct shf *shf;
int bsize = sflags & SHF_UNBUF ? (sflags & SHF_RD ? 1 : 0) : SHF_BSIZE;
int fd;
/* Done before open so if alloca fails, fd won't be lost. */
shf = alloc(sizeof(struct shf) + bsize, ATEMP);
shf->areap = ATEMP;
shf->buf = (unsigned char *) &shf[1];
shf->bsize = bsize;
shf->flags = SHF_ALLOCS;
/* Rest filled in by reopen. */
fd = open(name, oflags, mode);
if (fd < 0) {
afree(shf, shf->areap);
return NULL;
}
if ((sflags & SHF_MAPHI) && fd < FDBASE) {
int nfd;
nfd = fcntl(fd, F_DUPFD, FDBASE);
close(fd);
if (nfd < 0) {
afree(shf, shf->areap);
return NULL;
}
fd = nfd;
}
sflags &= ~SHF_ACCMODE;
sflags |= (oflags & O_ACCMODE) == O_RDONLY ? SHF_RD :
((oflags & O_ACCMODE) == O_WRONLY ? SHF_WR : SHF_RDWR);
return shf_reopen(fd, sflags, shf);
}
/*
* set up redirection, saving old fds in e->savefd
*/
static int
iosetup(struct ioword *iop, struct tbl *tp)
{
int u = -1;
char *cp = iop->name;
int iotype = iop->flag & IOTYPE;
bool do_open = true, do_close = false;
int flags = 0;
struct ioword iotmp;
struct stat statb;
if (iotype != IOHERE)
cp = evalonestr(cp, DOTILDE|(Flag(FTALKING_I) ? DOGLOB : 0));
/* Used for tracing and error messages to print expanded cp */
iotmp = *iop;
iotmp.name = (iotype == IOHERE) ? NULL : cp;
iotmp.flag |= IONAMEXP;
if (Flag(FXTRACE))
shellf("%s%s\n",
substitute(str_val(global("PS4")), 0),
snptreef(NULL, 32, "%R", &iotmp));
switch (iotype) {
case IOREAD:
flags = O_RDONLY;
break;
case IOCAT:
flags = O_WRONLY | O_APPEND | O_CREAT;
break;
case IOWRITE:
flags = O_WRONLY | O_CREAT | O_TRUNC;
/*
* The stat() is here to allow redirections to
* things like /dev/null without error.
*/
if (Flag(FNOCLOBBER) && !(iop->flag & IOCLOB) &&
(stat(cp, &statb) < 0 || S_ISREG(statb.st_mode)))
flags |= O_EXCL;
break;
case IORDWR:
flags = O_RDWR | O_CREAT;
break;
case IOHERE:
do_open = false;
/* herein() returns -2 if error has been printed */
u = herein(iop, NULL);
/* cp may have wrong name */
break;
case IODUP: {
const char *emsg;
do_open = false;
if (*cp == '-' && !cp[1]) {
/* prevent error return below */
u = 1009;
do_close = true;
} else if ((u = check_fd(cp,
X_OK | ((iop->flag & IORDUP) ? R_OK : W_OK),
&emsg)) < 0) {
warningf(true, "%s: %s",
snptreef(NULL, 32, "%R", &iotmp), emsg);
return (-1);
}
if (u == iop->unit)
/* "dup from" == "dup to" */
return (0);
break;
}
}
if (do_open) {
if (Flag(FRESTRICTED) && (flags & O_CREAT)) {
warningf(true, "%s: %s", cp, "restricted");
return (-1);
}
u = open(cp, flags, 0666);
}
if (u < 0) {
/* herein() may already have printed message */
if (u == -1) {
u = errno;
warningf(true, "can't %s %s: %s",
iotype == IODUP ? "dup" :
(iotype == IOREAD || iotype == IOHERE) ?
"open" : "create", cp, cstrerror(u));
}
return (-1);
}
/* Do not save if it has already been redirected (i.e. "cat >x >y"). */
if (e->savefd[iop->unit] == 0) {
/* If these are the same, it means unit was previously closed */
if (u == iop->unit)
e->savefd[iop->unit] = -1;
else
/*
* c_exec() assumes e->savefd[fd] set for any
* redirections. Ask savefd() not to close iop->unit;
* this allows error messages to be seen if iop->unit
* is 2; also means we can't lose the fd (eg, both
* dup2 below and dup2 in restfd() failing).
*/
e->savefd[iop->unit] = savefd(iop->unit);
}
if (do_close)
close(iop->unit);
else if (u != iop->unit) {
if (ksh_dup2(u, iop->unit, true) < 0) {
int eno;
eno = errno;
warningf(true, "%s %s %s",
"can't finish (dup) redirection",
snptreef(NULL, 32, "%R", &iotmp),
cstrerror(eno));
if (iotype != IODUP)
close(u);
return (-1);
}
if (iotype != IODUP)
close(u);
/*
* Touching any co-process fd in an empty exec
* causes the shell to close its copies
*/
else if (tp && tp->type == CSHELL && tp->val.f == c_exec) {
if (iop->flag & IORDUP)
/* possible exec <&p */
coproc_read_close(u);
else
/* possible exec >&p */
coproc_write_close(u);
}
}
if (u == 2)
/* Clear any write errors */
shf_reopen(2, SHF_WR, shl_out);
return (0);
}
int
c_read(char **wp)
{
int c = 0;
int expand = 1, history = 0;
int expanding;
int ecode = 0;
char *cp;
int fd = 0;
struct shf *shf;
int optc;
const char *emsg;
XString cs, xs;
struct tbl *vp;
char *xp = NULL;
while ((optc = ksh_getopt(wp, &builtin_opt, "prsu,")) != -1)
switch (optc) {
case 'p':
if ((fd = coproc_getfd(R_OK, &emsg)) < 0) {
bi_errorf("-p: %s", emsg);
return 1;
}
break;
case 'r':
expand = 0;
break;
case 's':
history = 1;
break;
case 'u':
if (!*(cp = builtin_opt.optarg))
fd = 0;
else if ((fd = check_fd(cp, R_OK, &emsg)) < 0) {
bi_errorf("-u: %s: %s", cp, emsg);
return 1;
}
break;
case '?':
return 1;
}
wp += builtin_opt.optind;
if (*wp == NULL)
*--wp = "REPLY";
/* Since we can't necessarily seek backwards on non-regular files,
* don't buffer them so we can't read too much.
*/
shf = shf_reopen(fd, SHF_RD | SHF_INTERRUPT | can_seek(fd), shl_spare);
if ((cp = strchr(*wp, '?')) != NULL) {
*cp = 0;
if (isatty(fd)) {
/* at&t ksh says it prints prompt on fd if it's open
* for writing and is a tty, but it doesn't do it
* (it also doesn't check the interactive flag,
* as is indicated in the Kornshell book).
*/
shellf("%s", cp+1);
}
}
/* If we are reading from the co-process for the first time,
* make sure the other side of the pipe is closed first. This allows
* the detection of eof.
*
* This is not compatible with at&t ksh... the fd is kept so another
* coproc can be started with same output, however, this means eof
* can't be detected... This is why it is closed here.
* If this call is removed, remove the eof check below, too.
* coproc_readw_close(fd);
*/
if (history)
Xinit(xs, xp, 128, ATEMP);
expanding = 0;
Xinit(cs, cp, 128, ATEMP);
for (; *wp != NULL; wp++) {
for (cp = Xstring(cs, cp); ; ) {
if (c == '\n' || c == EOF)
break;
while (1) {
c = shf_getc(shf);
if (c == '\0')
continue;
if (c == EOF && shf_error(shf) &&
shf_errno(shf) == EINTR) {
/* Was the offending signal one that
* would normally kill a process?
* If so, pretend the read was killed.
*/
ecode = fatal_trap_check();
/* non fatal (eg, CHLD), carry on */
if (!ecode) {
shf_clearerr(shf);
continue;
}
}
break;
}
if (history) {
Xcheck(xs, xp);
Xput(xs, xp, c);
}
Xcheck(cs, cp);
if (expanding) {
expanding = 0;
if (c == '\n') {
c = 0;
if (Flag(FTALKING_I) && isatty(fd)) {
/* set prompt in case this is
* called from .profile or $ENV
*/
set_prompt(PS2, NULL);
pprompt(prompt, 0);
}
} else if (c != EOF)
Xput(cs, cp, c);
continue;
}
if (expand && c == '\\') {
expanding = 1;
continue;
}
if (c == '\n' || c == EOF)
break;
if (ctype(c, C_IFS)) {
if (Xlength(cs, cp) == 0 && ctype(c, C_IFSWS))
continue;
if (wp[1])
break;
}
Xput(cs, cp, c);
}
/* strip trailing IFS white space from last variable */
if (!wp[1])
while (Xlength(cs, cp) && ctype(cp[-1], C_IFS) &&
ctype(cp[-1], C_IFSWS))
cp--;
Xput(cs, cp, '\0');
vp = global(*wp);
/* Must be done before setting export. */
if (vp->flag & RDONLY) {
shf_flush(shf);
bi_errorf("%s is read only", *wp);
return 1;
}
if (Flag(FEXPORT))
typeset(*wp, EXPORT, 0, 0, 0);
if (!setstr(vp, Xstring(cs, cp), KSH_RETURN_ERROR)) {
shf_flush(shf);
return 1;
}
}
shf_flush(shf);
if (history) {
Xput(xs, xp, '\0');
source->line++;
histsave(source->line, Xstring(xs, xp), 1);
Xfree(xs, xp);
}
/* if this is the co-process fd, close the file descriptor
* (can get eof if and only if all processes are have died, ie,
* coproc.njobs is 0 and the pipe is closed).
*/
if (c == EOF && !ecode)
coproc_read_close(fd);
return ecode ? ecode : c == EOF;
}
void
quitenv(struct shf *shf)
{
struct env *ep = e;
char *cp;
int fd;
yyrecursive_pop(true);
while (ep->oenv && ep->oenv->loc != ep->loc)
popblock();
if (ep->savefd != NULL) {
for (fd = 0; fd < NUFILE; fd++)
/* if ep->savefd[fd] < 0, means fd was closed */
if (ep->savefd[fd])
restfd(fd, ep->savefd[fd]);
if (ep->savefd[2])
/* Clear any write errors */
shf_reopen(2, SHF_WR, shl_out);
}
/*
* Bottom of the stack.
* Either main shell is exiting or cleanup_parents_env() was called.
*/
if (ep->oenv == NULL) {
#ifdef DEBUG_LEAKS
int i;
#endif
if (ep->type == E_NONE) {
/* Main shell exiting? */
#if HAVE_PERSISTENT_HISTORY
if (Flag(FTALKING))
hist_finish();
#endif
j_exit();
if (ep->flags & EF_FAKE_SIGDIE) {
int sig = (exstat & 0xFF) - 128;
/*
* ham up our death a bit (AT&T ksh
* only seems to do this for SIGTERM)
* Don't do it for SIGQUIT, since we'd
* dump a core..
*/
if ((sig == SIGINT || sig == SIGTERM) &&
(kshpgrp == kshpid)) {
setsig(&sigtraps[sig], SIG_DFL,
SS_RESTORE_CURR | SS_FORCE);
kill(0, sig);
}
}
}
if (shf)
shf_close(shf);
reclaim();
#ifdef DEBUG_LEAKS
#ifndef MKSH_NO_CMDLINE_EDITING
x_done();
#endif
#ifndef MKSH_NOPROSPECTOFWORK
/* block at least SIGCHLD during/after afreeall */
sigprocmask(SIG_BLOCK, &sm_sigchld, NULL);
#endif
afreeall(APERM);
for (fd = 3; fd < NUFILE; fd++)
if ((i = fcntl(fd, F_GETFD, 0)) != -1 &&
(i & FD_CLOEXEC))
close(fd);
close(2);
close(1);
close(0);
#endif
exit(exstat & 0xFF);
}
if (shf)
shf_close(shf);
reclaim();
e = e->oenv;
/* free the struct env - tricky due to the ALLOC_ITEM inside */
cp = (void *)ep;
afree(cp + sizeof(ALLOC_ITEM), ATEMP);
}
/*
* Called only when a process in j has exited/stopped (ie, called only
* from j_sigchld()). If no processes are running, the job status
* and state are updated, asynchronous job notification is done and,
* if unneeded, the job is removed.
*
* If jobs are compiled in then this routine expects sigchld to be blocked.
*/
static void
check_job(Job *j)
{
int jstate;
Proc *p;
/* XXX debugging (nasty - interrupt routine using shl_out) */
if (!(j->flags & JF_STARTED)) {
internal_errorf(0, "check_job: job started (flags 0x%x)",
j->flags);
return;
}
jstate = PRUNNING;
for (p=j->proc_list; p != (Proc *) 0; p = p->next) {
if (p->state == PRUNNING)
return; /* some processes still running */
if (p->state > jstate)
jstate = p->state;
}
j->state = jstate;
switch (j->last_proc->state) {
case PEXITED:
j->status = WEXITSTATUS(j->last_proc->status);
break;
case PSIGNALLED:
j->status = 128 + WTERMSIG(j->last_proc->status);
break;
default:
j->status = 0;
break;
}
/* Note when co-process dies: can't be done in j_wait() nor
* remove_job() since neither may be called for non-interactive
* shells.
*/
if (j->state == PEXITED || j->state == PSIGNALLED) {
/* No need to keep co-process input any more
* (at least, this is what ksh93d thinks)
*/
if (coproc.job == j) {
coproc.job = (void *) 0;
/* XXX would be nice to get the closes out of here
* so they aren't done in the signal handler.
* Would mean a check in coproc_getfd() to
* do "if job == 0 && write >= 0, close write".
*/
coproc_write_close(coproc.write);
}
/* Do we need to keep the output? */
if (j->coproc_id && j->coproc_id == coproc.id &&
--coproc.njobs == 0)
coproc_readw_close(coproc.read);
}
j->flags |= JF_CHANGED;
#ifdef JOBS
if (Flag(FMONITOR) && !(j->flags & JF_XXCOM)) {
/* Only put stopped jobs at the front to avoid confusing
* the user (don't want finished jobs effecting %+ or %-)
*/
if (j->state == PSTOPPED)
put_job(j, PJ_ON_FRONT);
if (Flag(FNOTIFY) &&
(j->flags & (JF_WAITING|JF_W_ASYNCNOTIFY)) != JF_WAITING) {
/* Look for the real file descriptor 2 */
{
struct env *ep;
int fd = 2;
for (ep = e; ep; ep = ep->oenv)
if (ep->savefd && ep->savefd[2])
fd = ep->savefd[2];
shf_reopen(fd, SHF_WR, shl_j);
}
/* Can't call j_notify() as it removes jobs. The job
* must stay in the job list as j_waitj() may be
* running with this job.
*/
j_print(j, JP_MEDIUM, shl_j);
shf_flush(shl_j);
if (!(j->flags & JF_WAITING) && j->state != PSTOPPED)
remove_job(j, "notify");
}
}
#endif /* JOBS */
if (!Flag(FMONITOR) && !(j->flags & (JF_WAITING|JF_FG)) &&
j->state != PSTOPPED) {
if (j == async_job || (j->flags & JF_KNOWN)) {
j->flags |= JF_ZOMBIE;
j->job = -1;
nzombie++;
} else
remove_job(j, "checkjob");
}
}
